Departments and specialties

Mayo Clinic has one of the largest and most experienced practices in the United States, with campuses in Arizona, Florida and Minnesota. Staff skilled in dozens of specialties work together to ensure quality care and successful recovery.

Doctors who treat this condition

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Displaying 1-7 out of 7 doctors available

  1. Jason H. Anderson, M.D.

    Jason H. Anderson, M.D.

    1. Pediatric Cardiologist
    2. Echocardiographer
    3. Interventional Cardiologist
    1. Rochester, MN
    Areas of focus:

    Congenital heart disease in adults, Coarctation of the aorta, Cardiomyopathy, Atrial septal defect, Patent foramen oval...e, Ventricular septal defect, Hypoplastic left heart syndrome, Atrioventricular septal defect, Patent ductus arteriosus, Congenital heart defects in children, Truncus arteriosus, Congenital heart defects in neonates and infants

  2. Adam R. Cassidy, Ph.D., L.P.

    Adam R. Cassidy, Ph.D., L.P.

    1. Neuropsychologist
    1. Rochester, MN
    Areas of focus:

    Neuropsychological assessment, Tetralogy of Fallot, Atrial septal defect, Congenital heart disease, Transposition of th...e great arteries, Ventricular septal defect, Hypoplastic left heart syndrome, Heart transplant complication

  3. Mohammed A. Faluk, M.D.

    Mohammed A. Faluk, M.D.

    1. Cardiologist
    2. Echocardiographer
    1. Phoenix, AZ
    Areas of focus:

    Cardioversion, Stress echocardiogram, Stress test, Transesophageal echocardiogram, Echocardiogram, Cardiac MRI, Electro...cardiogram, Congenital aortic stenosis, Congenital heart disease in adults, Coarctation of the aorta, Tetralogy of Fallot, Atrial septal defect, Congenital heart disease, Ebstein anomaly, Hypoplastic right heart syndrome, Transposition of the great arteries, Ventricular septal defect, Pulmonary atresia, Hypoplastic left heart syndrome, Pulmonary valve stenosis, Atrioventricular septal defect, Heart disease in pregnancy, Bicuspid aortic valve, Vascular anomaly, Pulmonary atresia with ventricular septum defect, Pulmonary atresia with intact ventricular septum, Tricuspid atresia, Truncus arteriosus, Partial anomalous pulmonary venous return, Total anomalous pulmonary venous return, Double-outlet right ventricle

  4. David S. Majdalany, M.D.

    David S. Majdalany, M.D.

    1. Cardiologist
    2. Echocardiographer
    1. Rochester, MN
    2. Phoenix, AZ
    Areas of focus:

    Stress echocardiogram, Transesophageal echocardiogram, Echocardiogram, Congenital heart disease in adults, Coarctation ...of the aorta, Aortic aneurysm, Tetralogy of Fallot, Atrial septal defect, Eisenmenger syndrome, Marfan syndrome, Patent foramen ovale, Ebstein anomaly, Transposition of the great arteries, Ventricular septal defect, Pulmonary atresia, Hypoplastic left heart syndrome, Pulmonary valve stenosis, Atrioventricular septal defect, Patent ductus arteriosus, Heart disease in pregnancy, Bicuspid aortic valve, Pulmonary atresia with ventricular septum defect, Pulmonary atresia with intact ventricular septum, Tricuspid atresia, Tricuspid valve disease, Truncus arteriosus, Vascular ring, Partial anomalous pulmonary venous return, Total anomalous pulmonary venous return, Congenital mitral valve anomaly, Double-outlet right ventricle

  5. Francois Marcotte, M.D.

    Francois Marcotte, M.D.

    1. Cardiologist
    1. Phoenix, AZ
    Areas of focus:

    Congenital heart disease in adults, Coarctation of the aorta, Tetralogy of Fallot, Atrial septal defect, Eisenmenger sy...ndrome, Patent foramen ovale, Ebstein anomaly, Transposition of the great arteries, Ventricular septal defect, Pulmonary atresia, Hypoplastic left heart syndrome, Pulmonary valve stenosis, Atrioventricular septal defect, Patent ductus arteriosus, Heart disease in pregnancy, Bicuspid aortic valve, Pulmonary atresia with ventricular septum defect, Pulmonary atresia with intact ventricular septum, Tricuspid atresia, Tricuspid valve disease, Truncus arteriosus, Vascular ring, Partial anomalous pulmonary venous return, Total anomalous pulmonary venous return, Congenital mitral valve anomaly, Double-outlet right ventricle

  6. Patrick W. O'Leary, M.D.

    Patrick W. O'Leary, M.D.

    1. Pediatric Cardiologist
    1. Rochester, MN
    Areas of focus:

    Echocardiogram, Heart disease, Congenital heart disease, Hypoplastic left heart syndrome, Congenital heart defects in c...hildren, Truncus arteriosus

  7. M. Yasir Qureshi, M.B.B.S.

    M. Yasir Qureshi, M.B.B.S.

    1. Pediatric Cardiologist
    1. Rochester, MN
    Areas of focus:

    Fetal echocardiogram, Transesophageal echocardiogram, Transthoracic echocardiogram, Coarctation of the aorta, POTS, Tet...ralogy of Fallot, Atrial septal defect, Myocarditis, Congenital heart disease, Syncope, Ebstein anomaly, Hypoplastic right heart syndrome, Transposition of the great arteries, Univentricular heart, Ventricular septal defect, Hypoplastic left heart syndrome, Atrioventricular septal defect, Congenital heart defects in children, Fetal heart disease, Dizziness, Chest pain, Truncus arteriosus, Vascular ring, Double-outlet right ventricle, Congenital heart defects in neonates and infants

Research

Researchers at Mayo Clinic study hypoplastic left heart syndrome (HLHS) and other types of congenital heart defects and congenital heart diseases. They work to find new treatments and surgeries for people with these conditions. Research topics include heart imaging, health outcomes, genes and regenerative medicine strategies. Mayo Clinic healthcare professionals also are gathering personal and family histories, heart images, tissue and cell samples, and genomic information from people with HLHS and their family members to learn more about the condition.

Specialized research

Mayo Clinic's Todd and Karen Wanek Family Program for Hypoplastic Left Heart Syndrome is a specialized center. It's dedicated to finding new ways to diagnose and treat HLHS. Topics of research include:

  • Using stem cells to strengthen the heart.
  • Searching for genes that may be responsible for hypoplastic left heart syndrome.

Read more about research in the Todd and Karen Wanek Family Program for Hypoplastic Left Heart Syndrome (HLHS).

Publications

See a list of publications about hypoplastic left heart syndrome by Mayo Clinic doctors on PubMed, a service of the National Library of Medicine.

Pioneering Treatment for Hypoplastic Left Heart Syndrome

[MUSIC PLAYING]

April Rubeck, Roman's mother: They said hat Roman had hypoplastic left heart syndrome and the best thing that we could do is take him home and it'd probably be 3 or 4 days and he would pass away on his own. I was 25 weeks pregnant when we went back home just absolutely devastated. We decided to come to Mayo. They gave us hope.

1 in 100 babies are born with a heart defect.

It is the No. 1 birth defect.

Dr. Joseph A. Dearani, M.D., Chair, Cardiovascular Surgery, Mayo Clinic: The focus of this initial trial is on the diagnosis of hypoplastic left heart syndrome and that is a congenital heart defect where half of the heart is not really formed. Now the ventricle that the child is left with is a ventricle that now has a much bigger responsibility than what it was initially designed for, and so over time, the function of this ventricle gradually can get reduced to the point that the child or maybe a young adult will start to develop symptoms of heart failure. Once the function of the ventricle goes down, we don't have anything that we can do for that. Stem cell therapy has the ability to improve the function of any of these ventricles that are failing whether it be a child, whether it be an adult, whether it be a congenital defect, whether it be an adult defect.

Mayo Clinic is conducting the first human trials using stem cells to improve congenital heart defects.

Dr. Tim Nelson, M.D., Ph.D., Director, Todd and Karen Wanek Family Program for Hypoplastic Left Heart Syndrome, Mayo Clinic: The study here at Mayo Clinic with hypoplastic left heart children is really the first FDA-approved clinical trial using stem cells to try to regenerate and cure congenital heart disease. So the study is really designed to identify children with this disease before they are born, collect umbilical cord blood at the time of their birth, so these children typically need three surgeries — first starting in the first few days of life, few months of life and a few years of life. These three open-heart surgeries give us an opportunity at the second one to deliver these stem cells into their heart with the intent of trying to make their heart bigger better and stronger. So Roman went through the procedure three months ago and received the stem cells and since that time he has done extremely well. What we believe is happening is that these cells are probably stimulating the underlying regenerative capacity of the heart.

There is 40,000 children born in the United States with congenital heart disease and a good percentage of them develop heart failure so this type of therapy may allow us or help us to delay or ideally prevent the need for cardiac transplantation.

Ryan Rubeck, Roman's father: I hope that Roman, Roman's future has no setbacks and nothing holds him back.

April: My hope for Roman's surgeries is that it'll benefit people in the future.

Dr. Nelson: The reality that we're facing today in biomedical research is funding is being pushed down at the national level, so it really creates this Valley of Death between innovation and applications.

Dr. Dearani: If you look at the major milestones in medicine, I mean, we had antibiotic therapy for the life-threatening infections, then we had the inception of heart surgery using the heart-lung machine, then we had transplantation where we were able to come up with medicines that you know minimized rejection. I mean that was probably the last major miracle in medicine so I mean this is the next potential miracle in medicine where it has the potential to impact the largest number of patients in healthcare in heart failure.

Today, over 5 million American suffer from heart failure.

So we can make a difference, so we should make a difference.

By 2030, heart failure is projected to impact 8 million Americans.

Join us. Make a difference.

Thank you.

American Heart Association/American Stroke Association

[MUSIC PLAYING]

Mayo Clinic Using Regenerative Medicine to Find Answers for Hypoplastic Left Heart Syndrome

Tim Nelson, M.D., Ph.D., Director, Todd and Karen Wanek Family Program for Hypoplastic Left Heart Syndrome, Mayo Clinic: I'm Tim Nelson. I'm the director of the Todd and Karen Wanek Family Program for Hypoplastic Left Heart Syndrome. This hypoplastic left heart research program here at Mayo Clinic comprises of nearly 60 people that work across the enterprise in multiple different areas of basic science all the way to clinical practice.

Our research program is dedicated to children with congenital heart disease with a condition specifically known as hypoplastic left heart. These children are born without a half of their heart and literally require three open heart surgeries to allow their heart to function and be compatible with life. Unfortunately, these hearts are not strong enough to live a normal sustain life span and the need for transplantation becomes real.

Our goal in our program is to invent and discover new regenerative stem cell-based therapies that allows us to rebuild these hearts make them bigger better and stronger with the goal of delaying or even preventing the need for cardiac transplantation down the road.

This multidisciplinary team works across the spectrum of research and discovery all the way to clinical applications. This multidisciplinary team is understanding the genetics, the natural history, and how stem cells work in these babies bodies when they are born. And by understanding the problem we then can engineer a solution. And today we have a clinical trial that we're currently offering patients where we actually use the umbilical cord blood collected at the time of their birth, processed and delivered into their heart muscle at the time of one of their elective surgeries. By doing this we hope that we can show that technology is safe in the congenital heart disease situation and ultimately be able to rebuild and strengthen the heart tissue to make it bigger, better and stronger. As we do the research in the lab and in the clinical setting, we're hoping to constantly improve and iteratively improve upon the cells that we use so we can grow better tissue that's stronger and more effective sustaining cardiac function and ultimately delaying in preventing transplant for children with hypoplastic left heart.

Research Profiles

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Sept. 18, 2026

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