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- This is the Becker's
Healthcare Podcast, created

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Thanks for listening.
Now here's the episode.

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- This is Chris Sosa with the
Becker's Healthcare Podcast.

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I'm thrilled today to be
joined by Amanda Vest, md,

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medical Director

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of the Cardiac Transplant
Program at Tufts Medical Center.

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Dr. Vest, thank you for joining us today.

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- Thank you for having me, Chris.

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- Dr. Vest, could you
please introduce yourself

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and tell us a bit about your background?

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- Yeah, certainly. I'm a heart failure

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and transplant cardiologist,

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and I lead the Advanced Heart
Failure Program here at Tufts

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Medical Center in Boston.

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I'm originally from the uk and
I trained in London, Boston

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and Cleveland, Ohio.

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Currently I mostly see
patients with heart failure,

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cardiomyopathies transplantation,

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and mechanical circulatory support.

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Another area of interest for
me is the treatment of obesity.

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I medically treat obesity in
patients with heart failure

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and also co-direct the clinical
nutrition course here at

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Tufts University School of Medicine.

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And actually my research area
is in nutrition, metabolism

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and body composition

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and for example, learning
how to help patients

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with skeletal muscle wasting

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who have heart failure as a condition.

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But super excited to join
you today to talk on some

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of these transplant topics.

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- Wonderful, thank you Dr. Va.

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So looking at the, the
bigger picture here, so

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what would you say are the three biggest

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issues in cardiology?

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I know that's a lot, so,
so take that as you will.

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- Yes, absolutely.

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Well, I come at it with a
bit of a transplant lean,

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but I'll start on the prevention end.

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And because I am interested in nutrition

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and obesity, I think it's
such an exciting time in terms

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of understanding

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how we prevent people from
developing cardiovascular

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diseases, specifically
including, uh, heart failure

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because obesity is a major risk
factor for it with our, um,

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newer medications that
treat metabolic health.

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So particularly the GLP one agonist.

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We've had some really
interesting data lately

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with a select study at
American Heart Association,

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and I think there are
huge opportunities there

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to help our populations
of patients with diabetes

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and obesity from developing
cardiovascular disease at all.

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In terms of the heart failure realm,

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I think there's a lot more
that we still have to do

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for timely diagnosis

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and implementation of
our medical therapies

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for people with heart failure.

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We have about 6.7 million
American adults living

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with heart failure at this time.

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Um, and not all of them are
picked up in a timely manner,

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and unfortunately not
all of them are treated

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with the therapies that
we know can be lifesaving

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and that can help recover their heart.

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So, uh, there's a lot more there

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to be done in collaboration
across primary care, cardiology,

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um, and, uh, uh, medical, uh, specialties.

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But lastly, getting to
the transplant area,

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it's such an exciting time to
be in heart transplantation

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because we've really been
able to optimize, uh, access

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to heart transplantation,
build up the volumes

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of transplantation in the
United States over the last few

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years, and really start to look at the way

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that we manage patients longer term

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after a heart transplant, for example,

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innovating in the ways that
we surveil for rejection, um,

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and bringing it back
again to metabolic health.

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Thinking about how do we
keep these patients surviving

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and thriving for the long-term
after a heart transplant.

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- Dr. Wess, I'm glad you mentioned
the collaboration aspect.

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What do you see as the
biggest challenges as far as

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that element is concerned
and how can they be overcome?

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- Right. I think we're really
in a phase now of trying

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to break down the silos
between, um, primary care

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and those who specialize in cardiology.

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In endocrinology and nephrology,
we're hearing a lot about,

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um, metabolic kidney,
cardiovascular health,

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and it really takes people
working across those domains,

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collaborating together, um,

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and, um, using often common medications to

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gain in multiple areas
of a patient's health.

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So we saw this a lot as the
SGLT two inhibitors became, um,

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proven and approved for
patients with heart failure

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with reduced ejection fraction

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and also preserved ejection fraction

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that no longer was this
group of medications,

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just the domain of the endocrinologist.

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But now it was very much the
domain of the cardiologist

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and the primary care
provider treating patients

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with heart failure and furthermore,

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has benefits in chronic
kidney disease as well.

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Um, similarly, we are
seeing now in the GLP one

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and GIP GLP one agonist medications,

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the opportunity not only to
treat the type two diabetes,

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but also to treat obesity and
of course optimize metabolic

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and cardiovascular health.

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So it really brings all
those subspecialty, uh,

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and general medicine
groups together to center

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around the patient and figure
out what's gonna be right

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for them for their long-term
cardiovascular wellbeing.

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- Another sort of big picture
question here for you, Dr.

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Vest. So when you see the
evolution of heart, heart care,

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I should say mm-hmm,
<affirmative> the next 18 months

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or so, two, three years,
what do you think is going

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to be the biggest trend
that is coming the way of

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that specialty?

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- Oh, so many exciting developments

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with medications and devices.

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Um, but perhaps I'll focus
on my area of transplant.

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It's really been, uh, a
fantastic few years of innovation

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in the way that heart
transplantation is done

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and how we care for the
patients afterwards.

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And an area that's been
particularly interesting

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is the clinical trial
and subsequent adoption

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and clinical practice of donation

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after circulatory death, DCD,
which is a type of heart donor

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that wasn't previously standard,
um, in the United States,

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but which has helped us to
transplant more patients, um,

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and get very good outcomes

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and was facilitated by the
development of new technology for

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the, um, optimization
of a donor heart graft

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and the transport of it
to the recipient hospital.

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And there are a number of other
innovations ongoing at the

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moment with slightly
different devices that seek

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to really revolutionize
the way that we, um, uh,

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manage that heart and transport it in

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after procurement to get
it in the best states

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for a transplant surgery.

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So I think this is a very
exciting area as we think about

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how can we make sure that we get access to

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as many heart transplants
of excellent quality

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for our patients on the wait list, knowing

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that unfortunately we
still have approximately 9%

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of patients who are listed for transplant

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ultimately passing away
without receiving a heart.

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And so the race is really on to figure out

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how we can bring heart
transplant to those who need it.

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- Uh, Dr. VAs, could you
elaborate a little bit on some

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of the technology that
you find most exciting?

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- Yes, absolutely.

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Um, so the donation

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after circulatory death,
um, option really came about

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because of a type

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of equipment we call
the organ care system.

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Um, the uh, system

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that was developed in a clinical
trial over the last couple

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of years is made by a company called Edix

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and allows us to take
a heart, um, even one

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that has stopped beating,
which is the case

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with DCD transplantation,
which we thought used

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to render the heart
inappropriate for transporting

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and uh, transplantation given
that it had stopped beating.

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But we now know we can place

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that heart onto the organ care system

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and perfuse it with blood
and electrolytes, warm it

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and get it beating again in such a way

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that we're not only able
to improve the quality of

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that organ, but also assess it
whilst it's on the platform.

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So this has opened up,
uh, the option of, uh,

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DCD transplantation,

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which probably adds somewhere
in the realm of another,

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about 15% volume

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of good quality donor hearts being

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available to our patients.

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And furthermore, starts to
give us more flexibility about

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how we can transport hearts over longer

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geographic distances.

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No longer are we beholden to
the cold static storage of a,

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a lowly cooler, which used to be the way

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that we brought hearts to the recipient,

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but now we have platforms where
we can keep that heart, uh,

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in good shape over a longer
period as we bring the heart,

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for example, from coast to coast.

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In the US there are a
number of other technologies

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that are being developed.

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Uh, we can do DCD transplantation
using something called

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Norm Themic Regional Perfusion,
uh, which utilizes some

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of our ECMO technology in circulating

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blood outside the body.

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We have other options for cold
static storage, for example,

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building on the idea of a
heart on ice in the cooler,

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but regulating the temperature
throughout the organ in a

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much more uniform way that's achieved

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by a device called the
Sherpa Pack from Paragons,

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and allows us to monitor
the temperature, um,

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during a period of
transport of the organ, uh,

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with some early data from our
team at Tufts, uh, suggesting

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that that heart can be
transported a little further

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and longer and still be of good quality.

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Another device that's coming
into trials is something called

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the Ex Vivo, um, device

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where the heart is continuously perfused

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and a, a cold eight
degree Celsius oxygenated

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cardioplegic nutrition hormone solution.

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So not yet available, um,
or FDA approved in the us

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but coming into trials

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with some exciting data internationally,

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- 15% Dr.

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Vest, that seems like no
small number when it comes

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to the number of hearts that
are available for transplant.

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- Absolutely. Um, expanding access

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to heart transplantation is so important.

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Um, and looking to, uh,

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utilize all available hearts
is absolutely key to that.

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A lot of work has gone into
the concept of how do we

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optimize hearts, um, ensure that any, um,

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possible donor is being
considered for donation,

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but certainly using DCD hearts, being able

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to be geographically more flexible

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with these organ preservation
and transport systems, um,

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and also using hearts,
for example, from donors

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who have Hepatitis C,
which has become standard

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of care over the last
decade, are all strategies

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that incrementally add up to
bring more heart transplants

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to the patients who need them.

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And amazingly, we're now
at more than 4,000 heart

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transplants a year in the United States.

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Um, so really, uh,
increasing on that volume

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and simultaneously, of course,

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many people doing excellent
work on enhancing the equity

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and access amongst populations
to this lifesaving resource.

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- Dr. West a little bit on the flip side

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of this conversation
that we've been having

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for the last few minutes, uh,

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00:11:50,255 --> 00:11:52,655
what would you say makes
you a little bit nervous and

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00:11:52,655 --> 00:11:55,525
or what would you like
to see improved as far as

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00:11:56,195 --> 00:11:57,525
your specialty is concerned?

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- Yes. Well, with all these
wonderful technologies

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00:12:01,755 --> 00:12:04,925
that has come, of course, the
potential for increasing cost,

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um, so that has certainly
been something that, uh,

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many programs have had
to look carefully at.

250
00:12:12,585 --> 00:12:15,565
And I think we'll see a lot
more over the next few years

251
00:12:15,655 --> 00:12:17,725
about thinking about cost effectiveness

252
00:12:18,185 --> 00:12:21,965
and how we can, um,
geographically share hearts

253
00:12:21,965 --> 00:12:23,365
and get them where we need them to be,

254
00:12:23,425 --> 00:12:25,365
but be smart in our resources.

255
00:12:25,585 --> 00:12:29,525
And already a lot of work is
going on to, um, really think

256
00:12:29,725 --> 00:12:34,205
through the systems of
care whereby teams are, um,

257
00:12:34,555 --> 00:12:37,565
located in hubs and sent
out to recover hearts

258
00:12:37,785 --> 00:12:39,845
and bring them back to the
center that needs them.

259
00:12:39,985 --> 00:12:41,405
So a lot of good work there.

260
00:12:42,095 --> 00:12:44,285
We've also got really
exciting technologies

261
00:12:44,585 --> 00:12:47,285
for monitoring patients
after heart transplantation.

262
00:12:47,865 --> 00:12:49,725
So for example, the surveillance

263
00:12:49,745 --> 00:12:53,165
for rejection has traditionally
been, um, the biopsy,

264
00:12:53,575 --> 00:12:55,605
which goes into the
right side of the heart

265
00:12:55,665 --> 00:12:57,445
and takes a sample of myocardium

266
00:12:57,445 --> 00:12:59,085
to be examined under the microscope.

267
00:12:59,785 --> 00:13:02,365
But we've got real opportunities
now to do a lot more

268
00:13:02,365 --> 00:13:04,445
of the surveillance less invasively using

269
00:13:04,975 --> 00:13:06,845
donor derived cell-free DNA,

270
00:13:07,415 --> 00:13:10,245
which is a blood test currently
commercially available

271
00:13:10,825 --> 00:13:12,645
on next generation sequencing

272
00:13:12,835 --> 00:13:16,165
that quantifies the donor
derived cell-free DNA,

273
00:13:16,705 --> 00:13:19,965
and can use single nucleotide variations

274
00:13:20,545 --> 00:13:22,605
to give a ratio of that

275
00:13:23,295 --> 00:13:27,605
donor derived cell-free DNA
coming from the heart versus the

276
00:13:27,605 --> 00:13:30,845
total pool of DNA that comes
from the recipient's body.

277
00:13:31,505 --> 00:13:34,765
Um, when the heart is under
stress, such as during a episode

278
00:13:34,765 --> 00:13:37,245
of rejection, the donor derived fraction

279
00:13:37,245 --> 00:13:38,925
that's coming from the heart increases

280
00:13:39,145 --> 00:13:41,005
and that can help us understand

281
00:13:41,005 --> 00:13:43,205
that the heart is having some difficulty

282
00:13:43,225 --> 00:13:44,845
and needs further investigation.

283
00:13:45,385 --> 00:13:48,245
Or on the flip side, that the
heart is actually doing well,

284
00:13:48,665 --> 00:13:52,285
um, has a low donor drive
cell-free DNA level, um,

285
00:13:52,305 --> 00:13:54,805
and that the patient can
continue their medications

286
00:13:54,985 --> 00:13:56,765
and continue in the
direction they're going.

287
00:13:57,305 --> 00:13:58,605
But you asked about the challenges

288
00:13:58,665 --> 00:14:02,885
and it can be quite difficult
to, um, roll out some

289
00:14:02,925 --> 00:14:05,485
of these changes in care across programs.

290
00:14:05,665 --> 00:14:06,685
Caring for patients

291
00:14:06,685 --> 00:14:08,925
with heart transplants
is incredibly complex.

292
00:14:09,465 --> 00:14:12,805
Um, it's a high risk situation
where we need a high burden

293
00:14:12,865 --> 00:14:15,605
of proof that changes in our protocols

294
00:14:15,665 --> 00:14:16,765
are safer and effective.

295
00:14:17,105 --> 00:14:19,565
And so we have seen some
differences in the speed

296
00:14:19,635 --> 00:14:22,485
with which these new
technologies are adopted

297
00:14:22,505 --> 00:14:23,845
across different programs.

298
00:14:24,265 --> 00:14:25,685
Um, and I think coming together

299
00:14:25,785 --> 00:14:28,725
as a community providing
educational resources

300
00:14:29,025 --> 00:14:30,925
and disseminating the data that's coming

301
00:14:30,925 --> 00:14:33,365
through from research
studies can be very helpful

302
00:14:33,945 --> 00:14:36,205
in getting pat in getting
programs to the point

303
00:14:36,205 --> 00:14:39,045
where they're comfortable,
uh, taking on some

304
00:14:39,045 --> 00:14:41,485
of these newer innovations for patients

305
00:14:41,485 --> 00:14:42,565
with heart transplantation.

306
00:14:44,545 --> 00:14:48,005
- Doctor, I did wanna ask you
a little bit about a that, uh,

307
00:14:48,005 --> 00:14:51,445
your health system had early
this year where you had a

308
00:14:52,135 --> 00:14:54,925
transplant candidate who received a heart

309
00:14:54,925 --> 00:14:57,525
after seven months in
the care of the hospital.

310
00:14:57,745 --> 00:15:00,805
So can you take me through
just a little bit about how

311
00:15:00,805 --> 00:15:01,925
that process went

312
00:15:02,065 --> 00:15:03,845
and what was it like, what it was like

313
00:15:03,845 --> 00:15:06,725
to finally tell this person,
Hey, we have a heart form?

314
00:15:08,425 --> 00:15:09,805
- Yes, absolutely.

315
00:15:09,945 --> 00:15:13,325
Our, um, patients do sometimes
wait a very long time

316
00:15:13,345 --> 00:15:16,005
for heart transplantation,
which can be an incredibly

317
00:15:16,805 --> 00:15:18,485
challenging journey for
them and their family.

318
00:15:19,385 --> 00:15:23,485
Um, these days, many of
our heart transplants occur

319
00:15:23,585 --> 00:15:26,125
for patients who are supported
on temporary mechanical

320
00:15:26,125 --> 00:15:31,085
circulatory support, so
heart pumps that are, um,

321
00:15:31,335 --> 00:15:33,325
optimizing the blood flow around the body

322
00:15:33,465 --> 00:15:34,765
and for which the patient needs

323
00:15:34,765 --> 00:15:36,565
to stay in the intensive care unit.

324
00:15:37,585 --> 00:15:41,005
We, um, try to get the patient as active

325
00:15:41,305 --> 00:15:44,325
and up moving around as much
as possible during this period,

326
00:15:44,425 --> 00:15:47,405
but still it's very
challenging to be confined

327
00:15:47,405 --> 00:15:51,005
to an intensive care unit for
a long period of time, um,

328
00:15:51,015 --> 00:15:53,565
often with lots of
medical and emotional ups

329
00:15:53,565 --> 00:15:54,565
and downs along the way.

330
00:15:54,705 --> 00:15:57,845
So it's one of the greatest
privileges of my job to be able

331
00:15:57,945 --> 00:16:01,685
to talk to a patient about
receiving a match, um,

332
00:16:01,945 --> 00:16:06,285
and help them to get through
to realizing all those future

333
00:16:06,895 --> 00:16:09,245
goals and, um, achievements

334
00:16:09,245 --> 00:16:10,845
that they're looking for in their life.

335
00:16:11,355 --> 00:16:12,365
Just the nicest thing.

336
00:16:12,505 --> 00:16:16,805
So, um, certainly, uh,
a, a challenging process

337
00:16:17,265 --> 00:16:18,525
for many of our patients,

338
00:16:18,825 --> 00:16:20,885
but really delightful when we're able

339
00:16:20,885 --> 00:16:22,605
to give people a new lease on life.

340
00:16:23,105 --> 00:16:24,525
And really wonderful

341
00:16:24,525 --> 00:16:26,925
that this year we've had a very busy year

342
00:16:26,925 --> 00:16:27,965
at Tufts Medical Center.

343
00:16:28,095 --> 00:16:29,765
We're not quite through 2023,

344
00:16:29,825 --> 00:16:32,405
but we've done 56 heart
transplants this year,

345
00:16:32,855 --> 00:16:36,525
which actually equals our
record in the New England region

346
00:16:36,755 --> 00:16:39,405
that we set back in
2016 for the most number

347
00:16:39,405 --> 00:16:42,245
of heart transplants in
this region in a year.

348
00:16:42,465 --> 00:16:45,125
So hopefully we'll be able
to keep moving forwards

349
00:16:45,125 --> 00:16:46,805
and offer this gift of life

350
00:16:46,805 --> 00:16:49,405
to even more patients on our waiting list

351
00:16:49,505 --> 00:16:50,605
as we wrap up the year.

352
00:16:51,585 --> 00:16:53,725
- Dr. West, thank you so
much for being so generous

353
00:16:53,725 --> 00:16:55,085
with your time and insights today.

354
00:16:55,105 --> 00:16:56,765
We can't wait to share
them with our audience.

355
00:16:56,765 --> 00:16:58,325
Julie, uh, thank you again,

356
00:16:58,385 --> 00:17:00,765
and we look forward to
connecting with you soon. Thanks

357
00:17:00,765 --> 00:17:01,765
- For having me, Chris.

358
00:17:03,595 --> 00:17:06,165
- It's so important for leaders
at the top of organizations

359
00:17:06,185 --> 00:17:08,685
to keep learning, stay
sharp, grow their networks

360
00:17:09,025 --> 00:17:11,565
to help our audience better
do this in a more simplified,

361
00:17:11,565 --> 00:17:13,205
personalized, and meaningful way.

362
00:17:13,805 --> 00:17:16,045
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363
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366
00:17:22,755 --> 00:17:23,805
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367
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368
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