Children's Hospital Colorado

Heart Institute 2025 Annual Report

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Making excellence the standard

In 2025, the Heart Institute continued to set the standard for pediatric and congenital heart care. We received our highest ranking yet from U.S. News & World Report — No. 2 in the nation for Cardiology and Heart Surgery among children’s hospitals. This recognition reflects the unwavering dedication, expertise and compassion of our entire team.

“2025 marked a year of extraordinary accomplishments and growth at the Heart Institute. We continued to set a standard of excellence, provided unparalleled congenital heart care and were proud to have received our highest national ranking yet by U.S. News & World Report. This recognition reflects the unwavering dedication, expertise and compassion of our entire team.”
Jim Jaggers, MD, Chair of Pediatric Congenital Heart Surgery and Co-Director of the Heart Institute

2025 by the numbers

Our numbers mean a whole lot more than a head count. They represent lives saved, families given hope and memories made that may have never been.

Always growing

We’re constantly expanding to meet the rising demand for complex congenital heart care. Our team of more than 500 specialists spans more than 20 locations across Colorado, Montana, New Mexico and Wyoming, helping us treat children in need of heart care across the Rocky Mountain region and beyond. These numbers represent just some of the work we did in 2025: 

“Throughout all our growth in 2025, our outcomes remain among the strongest in the nation and we continue to increase our patient volumes. Our accomplishments reflect the best of who we are — a team with many different skills, working together in the spirit of excellence and collaboration to provide the best possible care for the patients and families we serve.”
Shelley Miyamoto, MD, FAHA, Chair of Pediatric Cardiology and Co-Director of the Heart Institute

Surgical outcomes

One of the best indicators of a medical program’s care is its outcomes. We share our outcomes publicly so families and the physicians that refer them feel confident that children coming here are getting the best complex cardiac treatment. 

Advocacy and community

Our care reaches far beyond the walls of our hospitals. From advocating for our patients by contributing research for FDA approvals to planning events that bring families with shared medical experience together, our commitment to our community, patients and families remains strong and impactful.

Advocacy spotlight

Reaching out to our community and beyond

Hearts in Action

Led by our cardiology fellows, Hearts in Action is a new service initiative designed to bring together the entire Heart Institute — fellows, faculty, staff and their families — to give back to the community. Since its launch in the spring of 2025, Hearts in Action has:

Research and innovation

The Heart Institute is continuously conducting research to determine the best ways to care for children with congenital and acquired heart disease. In 2025, we participated in dozens of studies, published scores of research papers and earned millions in grants to continue vital research.

New grants in 2025

Each year, our team continues to secure grants for impactful research. From exploratory studies to treatment-defining innovations, our research efforts represent the full spectrum of learning that can both open doors to new methods of care and refine treatments to improve outcomes.

Published work

In 2025, our faculty and fellows published more than 100 manuscripts in leading peer-reviewed journals from innovative diagnostic imaging and surgical techniques to long-term outcomes and health equity in pediatric cardiology. Here are just a few:

“Ventricular Assist Device Use in Pediatric Restrictive and Hypertrophic Cardiomyopathy: An ACTION Registry Analysis”

By senior author Kathleen Simpson, MD

Read the publication in the ASAIO Journal

“Development of an Atlas for US Pediatric Acute Care”

By senior author Emily Bucholz, MD, MPH

Read the publication in the JAMA Pediatrics

“The International Society for Heart and Lung Transplantation Guidelines for the Management of Pediatric Heart Failure (Update From 2014)”

By senior author Shelley Miyamoto, MD

Read the publication in the Journal of Heart and Lung Transplantation

“Targeted Immunotherapy with Sphingosine-1-phosphate Improves Myocardial Contractility and Mitochondrial Function in a Novel Murine Ex Vivo Perfusion and Transplantation Model”

By senior author Matthew L. Stone, MD, PhD

Read the publication in the Journal of Thoracic & Cardiovascular Surgery

“Cognitive Outcomes and Delirium After Cardiac Neurodevelopmental Program Implementation for Children with Congenital Heart Disease”

By Kelly R. Wolfe, PhD, ABPP-CN, and Jesse A. Davidson, MD, MPH, MSc

Read the publication in JAMA Network

Q: Advances and Answers

Pediatric cardiologist Dr. Jenny Zablah explores the images of a patient’s heart using a virtual reality headset at Children’s Hospital Colorado.

A strong pulse in research

This year, our dedicated research blog highlighted studies on innovations in imaging and diagnostic accuracy, including new cardiopulmonary exercise testing models that account for altitude-related effects and advancements in fetal cardiac MRI that are transforming prenatal care.

Learn about more advances we made in 2025

Faculty and fellows

Our continuously expanding faculty demonstrates our dedication to building the best medical team. We foster talent and promote those that show great promise. Our vibrant fellows program not only helps us educate the next generation of cardiologists and heart specialists for our hospital, but for many across the nation.

New faculty

We could not be more thrilled to have welcomed 16 new faculty members to the Heart Institute over the course of the year — each bringing expertise, fresh perspectives and a shared passion for advancing children’s heart health. Their diverse backgrounds and innovative approaches strengthen our commitment to providing exceptional care, driving groundbreaking research and training the next generation of pediatric cardiology leaders. Together, they represent an exciting new chapter in our future.

Faculty spotlight

Fellows

Our Pediatric Cardiology Fellowship Program continues to thrive, attracting exceptional physicians dedicated to advancing the care of children with heart disease. This year, we are proud to introduce a diverse and talented group that will help shape the future of pediatric cardiology for years to come.

First year fellows

  • Alexandra Madison Curry, DO
  • Kyle Barrington Grimes, MD
  • Maya Padma Mahendran, MD
  • Phuong “PJ” Tran, MD
  • Margaret “Meg” Van Der Bosch, MD

Second year fellows

  • Khalifa Abdulhadi M. Aldawsari, MD
  • Ricardo Pedro Jesus Cabrera, MD
  • Elaina Loughran Cummer, MD
  • Michael Philip Gould, MD
  • Kelsey Alexa Wilson, MD

Third year fellows

  • Hannah Hollon, MD
  • Umakanthan Kavin, MD
  • Aidan Reid, DO

Advanced fellows

  • Maria Fouad Abou Nader, MD: Pediatric Cardiac Intensive Care
  • Tracey Crooks, MD: Advanced Training in Adult Congenital Heart Disease
  • Chris Iskander, MD: Pediatric Interventional Congenital Cardiology
  • Mehmet Kucuk, MD: Pediatric Interventional Congenital Cardiology
  • Benjamin Olsen, MD: Pediatric Heart Failure and Transplant
  • Nithya Swaminathan, MD: Pediatric Advanced Cardiac Imaging

Advanced fellow spotlight

Graduated fellows

Our seven graduating fellows continue to distinguish themselves as incredible clinicians, scholars and leaders in the field. Their collective accomplishments reflect the strength of our fellowship program and their dedication to advancing pediatric heart care for children everywhere.

Nadia Chaudhry-Waterman, DO

  • Current role: Critical Care Fellow, Boston Children's Hospital

Charles D. Fraser, III, MD

  • Current role: Pediatric Cardiothoracic Surgeon, Texas Center for Pediatric and Congenital Heart Disease

Samantha Holmes, MD

  • Current role: Cardiac Imager, Children's Hospital Colorado/Assistant Professor, University of Colorado

Kelsey G. Iguidbashian, MD

  • Current role: Cardiac Acute Care Hospitalist, Children’s Hospital Colorado/Assistant Professor, University of Colorado

Shannon Murray, MD

  • Current role: ACHD Provider, Children’s Hospital Colorado/Assistant Professor, University of Colorado

Saneeha Shaheed, MD

  • Current role: Assistant Professor of Pediatrics, University of Chicago/Comer Children's Hospital and Advocate Children’s Hospital in Chicago

Charles T. Simpkin, DO

  • Current role: Cardiac Imager, Children's Hospital Colorado/Assistant Professor, University of Colorado

Graduated fellow spotlight

Awards and appointments

We had several team members appointed to important positions within the medical community and among nonprofit organizations and some who received prestigious awards. These appointments and awards are a testament to the passion and dedication that we show not just in our hospital, but across the country.

Shelley D. Miyamoto, MD, FAHA: Chair of the American Heart Association’s Scientific Publishing Committee

Kathleen Simpson, MD: Vice President of Pediatric Heart Transplant Society

Carly Scahill, DO, MSCR: Board of Directors for the Pediatric Cardiac Intensive Care Society

Keila N. Lopez, MD, MPH: National Medical Advisory Council for Make-A-Wish Foundation

Emily Bucholz, MD, MPH: Emerging Leader in Health and Medicine Scholar by the National Academy of Medicine

Dustin Nash, MD: Pediatric Heart Network Scholar Award

Heart Institute Grand Rounds

This year marked the launch of our Heart Institute Grand Rounds, highlighting our faculty’s commitment to continuous learning and knowledge exchange. Kathryn Collins, MD, played a critical role in launching the series and Sherrill Caprarola, MD, did an excellent job of taking on the responsibility for the ongoing management of the lectures. We had a number of experts present, both from Children’s Colorado and other organizations:

Keila N. Lopez, MD, MPH: "Good Trouble: Mobilizing Research and Health Policy to Promote Health Equity"

Former Associate Professor of Pediatrics, Division of Pediatric Cardiology at Baylor College of Medicine and Director of Transition Program at Texas Children’s Hospital. Currently, Dr. Lopez is the Director of Health Policy and Faculty Development at Children’s Colorado and the Jack Cooper Millisor Chair in Pediatric Heart Disease.

Shubhayan Sanatani, MD: "Catecholaminergic Polymorphic Ventricular Tachycardia: Reflecting on the Past 40 Years"

Division Head of Pediatric Cardiology, Medical Director and Section Head of Heart Rhythm Service, Professor of Department of Pediatrics, Faculty of Medicine at University of British Columbia

Joseph W. Turek, MD, PhD, MBA: "Pediatric Heart Transplantation: Understanding History to Shape the Future"

Chief of Pediatric Cardiac Surgery, Division of Cardiovascular and Thoracic Surgery at Duke University Medical Center

Shabnam Peyvandi, MD, MAS: "Early Life Markers of Brain Health in Congenital Heart Disease: From Research to Clinical Applications"

Professor of Children’s Health, University of California - San Francisco and Director of Pediatric Cardiovascular Research and Associate Director of Fetal Cardiovascular Program at Benioff Children’s Hospital

Gareth J. Morgan, MD: "Lifetime Management of the RVOT: The Russian Doll Paradox"

Medical Director of Interventional Cardiology, Heart Institute at Children’s Hospital Colorado and Professor of Pediatrics, Cardiology at University of Colorado School of Medicine

Matthew L. Stone, MD, PhD: "Ex Vivo Heart Perfusion and Targeted Therapies for Donor Heart Treatment in Transplantation"

The Meg F. Rady and Family Chair in Congenital Cardiac Surgery, Heart Institute at Children’s Hospital Colorado and Associate Professor, Division of Congenital Cardiac Surgery at University of Colorado School of Medicine

Alex J. Barker, PhD: "Fetal Cardiac MRI for the In-Utero Assessment of Congenital Heart Disease: A Translational Journey"

Director, Advanced Imaging Lab and Vice Chief of Pediatric Radiology Research at Children's Hospital Colorado and Professor of Radiology and Bioengineering at University of Colorado, Anschutz

Stories of impact

We had stories of hope and triumph in 2025, of innovation and advancement, and of personal accomplishment and hospital-wide success. Here are just a handful of those stories told by our doctors, patients and the media.

Voices in pediatric cardiology

Children’s Colorado’s Charting Pediatrics podcast has 2.3M lifetime downloads and has reached 187 countries, helping our doctors reach more people across the world. Our Spanish-language podcast, Pediatras en Línea, has 98K lifetime downloads and has reached 107 countries.

Cracking the Cardiac Code

Director of the Cardiac Genetics and Aortopathy Program, Katie Chatfield, MD, explored a host of genetic-related topics including how to identify which children should receive a cardiac genetics evaluation and distinguishing inherited, spontaneous and mutation-based diseases.

Downloaded 1,966 times in 69 countries (and counting).

Listen to the episode

Roni Jacobsen, MD

Long-Term Care for Adult Congenital Heart Disease

Director of the Adult Congenital Heart Disease (ACHD) Program, Roni Jacobsen, MD, examined what long-term care looks like for ACHD. She discussed the critical transition to adulthood for patients with congenital heart lesions and explored key topics such as defining adult congenital heart disease and how it differs from other cardiac conditions.

Downloaded 1,691 times in 61 countries (and counting).

Listen to the episode

Silenciando a tu Crítico Interno con la Dra. Jenny Zablah (Silencing your Inner Critic with Dr. Jenny Zablah)

Director of the Pulmonary Vein Stenosis Program and Cath Lab Advanced Imaging Program, Jenny Zablah, MD, discussed the importance of quieting one’s inner voice and reshaping self-talk — an essential practice for healthcare professionals striving to maintain their own wellbeing while navigating the demands of a challenging field.

Listened to in 30 countries (and counting) with the most listeners in Mexico, Peru, Argentina, Spain and the U.S.

Listen to the episode

Media highlights

A young girl walks down a hospital hallway as staff members cheer.

Dual-organ transplant marks new era

More than two years ago, our cardiology and hepatology teams began planning for a surgery they had never completed before at Children’s Colorado. In fact, only 38 pediatric heart-liver dual transplants had ever been performed in the U.S. That careful preparation would ultimately be lifesaving for Gracie, an 11-year-old with hypoplastic left heart syndrome (HLHS), whose dual-transplant was performed last year.

Watch history in the making from KKTV 11

A basketball resting on a gym floor

From the other side of the world to our doorstep

Fourteen-year-old Manasse came to Colorado from Namibia as a political refugee last October with his family. His love of basketball put him on the high school team. In January, he collapsed during a game and was unresponsive with no pulse. Thanks to quick-thinking trainers, an onsite automated external defibrillator and sharp first responders, Manasse was revived before he reached the hospital.

Watch the incredible 9News story

A young girl in a hospital bed holds up a long sheet of paper with signatures

Allyson’s fried pickle petition catches the limelight 

Allyson had a lengthy stay at Children's Colorado post-heart transplant. When the food in our cafeteria wasn't satisfying her cravings during recovery, she took matters into her own hands and crafted a petition to add fried pickles to the menu.

Watch Allyson’s scrumptious story

Penguins in a zoo

Kinsley meets an unlikely friend with the same heart condition

A tough medical experience can be a little easier when you meet someone who has gone through something similar — even if his breath smells like fish. Steppy, an endangered African penguin, and Kinsley were both diagnosed with heart murmurs when they were babies. But thanks to the dedicated care they received, they’re now happy and healthy.

Watch Kinsley’s cuddly story

A young boy stands against a fence smiling. His shirt says heart transplant survivor 5 years strong

Mason gets a new heart faster than most

Mason was born with hypoplastic left heart syndrome and had his first open heart surgery at just four days old. After several more complications and procedures, doctors decided he needed a heart transplant. In just 28 days, he went from a second open heart surgery to a heart transplant.

Watch Mason's amazing transplant story 

A couple smiles holding their young infant at a Rockies game

Lainey’s parents thrown a curveball

As a pitcher for the Colorado Rockies, Lucas knows a thing or two about curveballs. But he and his wife got a much different one at the couple’s 20-week ultrasound, when they learned their daughter would be born with several heart conditions. The very next day, they had an appointment at Children’s Colorado for scans to confirm and learn more about their daughter’s diagnosis: an interrupted aortic arch.

Watch the news feature from CBS