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Program Leadership

Daniel Mauriello, M.D.

Daniel Mauriello, M.D.

Pediatric Cardiology Fellowship Program Director

Dr. Mauriello is a general pediatric cardiologist who treats children with congenital heart disease. His areas of focus include graduate education as well as clinical interests in pulmonary hypertension and autonomic dysfunction. After graduating from the University of South Florida Morsani College of Medicine, he completed a residency in pediatric and adolescent medicine and a pediatric cardiology fellowship at the Mayo School of Graduate Medical Education, located at the Mayo Clinic in Rochester, Minnesota. His research interests include clinical outcomes and quality improvement measures.

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Joy Johnson, M.D., M.S.

Joy Johnson, M.D., M.S.

Pediatric Cardiology Fellowship Associate Program Director

Dr. Johnson is the director of the Fetal Heart Program in the Heart Institute at Johns Hopkins All Children’s. She joined the hospital team in 2021. She was previously a pediatric cardiologist at Ann & Robert H. Lurie Children’s Hospital of Chicago and an assistant professor of pediatrics in the Division of Pediatric Cardiology at Northwestern University Feinberg School of Medicine. Dr. Johnson has published a number of peer-reviewed articles, authored book chapters and given talks nationally. Her clinical expertise is in fetal and pediatric echocardiography, and the care of all children with heart disease. Her research interests center around value, cost and outcomes in congenital heart disease.

View Joy Johnson, M.D., M.S.’s Bio

Jessica Laks, M.D.

Jessica Laks, M.D.

Pediatric Cardiology Fellowship Assistant Program Director

Dr. Laks is a pediatric cardiologist who specializes in heart failure and transplantation. Dr. Laks earned her medical degree from the University of Ottawa in Ottawa, Ontario. She completed a residency in pediatrics at the University of Manitoba in Winnipeg, Manitoba, where she also served as pediatric co-chief resident. She completed a pediatric cardiology fellowship, where she served as chief pediatric cardiology fellow, followed by additional training in a pediatric heart function and transplant fellowship at The Hospital for Sick Children in Toronto. She is also in the process of completing her Master of Science in Community Health with a specialization in Health Practitioner Teacher Education from the University of Toronto. Her clinical and research interests include medical education, cardiomyopathy and VAD management, and heart transplant outcomes.

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Faculty

Alfred Asante-Korang, MD

Alfred Asante-Korang, MD

Pediatric Cardiology
Dr. Asante-Korang is a pediatric cardiologist with the Johns Hopkins All Children’s Heart Institute, and has been working with congenital heart disease and heart transplant patients for more than 20 years. Dr. Asante-Korang graduated from the University of Ghana Medical School, where he completed an internship in pediatrics. He is a fellow of the American College of Cardiology and a member of the Royal College of Physicians, United Kingdom. Dr. Asante-Korang completed pediatric residencies at the University of Liverpool in the United Kingdom and the University of Chicago, as well as fellowships in pediatric cardiology at the IWK Children’s Hospital in Halifax, Canada and Children’s Hospital of Pittsburgh. He also holds an Advanced Diploma in Data and Systems Analysis from University of Oxford, England.
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Marguerite Crawford, MD

Marguerite Crawford, MD

Pediatric Cardiology
Dr. Crawford is a general pediatric cardiologist and director of cardiac MRI (magnetic resonance imaging) imaging at the Johns Hopkins All Children’s Heart Institute. She is an assistant professor of pediatrics with the Johns Hopkins University School of Medicine. After graduating from the University of Louisville School of Medicine, she completed a pediatric residency, served as chief pediatric resident and then did her pediatric cardiology fellowship at the University of Virginia. Dr. Crawford obtained additional training in cardiac MRI imaging during her fellowship at Virginia and also was a fellow in cardiac MRI at Children’s Hospital Boston.
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Jamie Decker, MD

Jamie Decker, MD

Pediatric Cardiology
Dr. Decker is a pediatric cardiologist specializing in electrophysiology, cardiac arrhythmias, cardiomyopathies and heart failure. He offers innovative and minimally invasive techniques to benefit patients at the Johns Hopkins All Children’s Heart Institute. Before joining Johns Hopkins All Children’s Hospital, Dr. Decker was an assistant professor of pediatrics at Baylor College of Medicine and Texas Children’s Hospital in Houston, where he completed a fellowship in pediatric cardiology, an advanced fellowship in heart failure/transplantation, and an advanced fellowship in pediatric electrophysiology at Baylor College of Medicine. A graduate of Robert Wood Johnson Medical School in Camden, New Jersey, Dr. Decker did his pediatric residency training at Children’s National Medical Center in Washington, D.C.
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Grace Freire, MD

Grace Freire, MD

Pediatric Cardiology
Dr. Freire specializes in pediatric cardiology in the Johns Hopkins All Children’s Heart Institute, evaluating and treating patients with congenital heart disease starting in the womb. She also leads the hospital’s pediatric pulmonary hypertension program, managing patients with pulmonary hypertension from different causes. She is an assistant professor of pediatrics in the Johns Hopkins University School of Medicine.
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Asma Khan, MBBS

Asma Khan, MBBS

Pediatric Cardiology
Dr. Khan is a pediatric cardiologist who specializes in heart failure and transplantation. She sees patients as part of the Heart Transplant Program at the Johns Hopkins All Children’s Heart Institute. She joined the hospital staff in 2021. Dr. Khan earned her medical degree from Aga Khan University, Medical College in Karachi, Pakistan. She completed a pediatric residency at SUNY Health Science Center in Brooklyn, New York, followed by a fellowship in pediatric cardiology at Icahn School of Medicine at Mount Sinai in New York and a fellowship in pediatric heart failure and transplant at the Ann and Robert H. Lurie Children’s Hospital in Chicago.
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Bruce Landeck, MD MS

Bruce Landeck, MD MS

Pediatric Cardiology
Dr. Landeck is a pediatric cardiologist and director of Echocardiography at Johns Hopkins All Children’s Heart Institute. He joined the hospital staff in 2021. He was most recently the Director of the Cardiac Progressive Care Unit and interim clinical director of Echocardiography at Children’s Hospital Colorado.
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Joelle Miller, MD

Joelle Miller, MD

Pediatric Cardiology
Dr. Miller is a pediatric cardiologist for Johns Hopkins All Children’s Hospital. She sees patients at outpatient care centers in North Port and Fort Myers. Dr. Miller earned her medical degree at the University of Florida and completed her pediatric internship at Shands Teaching Hospital in Gainesville. She completed a pediatrics residency at the University of Miami at Jackson Memorial Hospital, serving as co-chief resident. She also completed a pediatric cardiology fellowship at the University of Miami and Jackson Memorial Hospital.
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Michelle Miller, MD

Michelle Miller, MD

Pediatric Cardiology
Dr. Miller specializes in pediatric, fetal and adult congenital heart disease, with a particular focus in fetal medicine. She works closely with prenatal practitioners throughout the area to offer safe, well-planned pregnancies and deliveries and educates local pediatric caregivers and community hospitals in caring for children and pregnant women with cardiac issues. After completing her pediatric cardiology fellowship at UCLA, Miller became the director of fetal cardiology at Cedars-Sinai Medical Center in Los Angeles and an associate professor of medicine in the UCLA Department of Pediatrics. Having relocated to Florida in 2010, Dr. Miller is an associate professor of medicine with the Florida State University Medical School. She has published multiple scholarly articles on pediatric and fetal cardiology. Recently, Dr. Miller began cataloging the cardiac pathology library at Johns Hopkins All Children’s Hospital, a project that will make a significant contribution to education and research.
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Benton Ng, MD

Benton Ng, MD

Pediatric Cardiology
Dr. Ng is a pediatric cardiologist with expertise in noninvasive imaging, including transthoracic echocardiography, transesophageal echocardiography, and cardiac MRI. After completing his medical training at the University of Texas Southwestern in Dallas, he completed his pediatric residency at the University of Wisconsin in Madison, followed by a pediatric cardiology fellowship at the University of Iowa in Iowa City. He received additional training in cardiac MRI at the Children’s Hospital of Philadelphia. Prior to joining Johns Hopkins All Children’s Hospital, he was a clinical assistant professor and director of pediatric noninvasive imaging services at the University of Iowa. Dr. Ng also holds a master’s degree in clinical investigation from the University of Iowa.
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Michael Puchalski, MD

Michael Puchalski, MD

Pediatric Cardiology
Dr. Puchalski is co-director of the Heart Institute and medical director of cardiology at Johns Hopkins All Children’s. He joined the hospital staff in 2020. He was previously associate director of the Division of Pediatric Cardiology in the Department of Pediatrics at the University of Utah in Salt Lake City. He also served as director of noninvasive imaging for cardiology after building the Fetal Heart Center and starting the cardiovascular MRI program. He was director of quality improvement for the Heart Center at Primary Children’s Hospital in Salt Lake City and medical director of outpatient services at Primary Children’s Medical Center in Riverton, Utah.
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Jeremy Ramey, MD

Jeremy Ramey, MD

Pediatric Cardiology
Dr. Ramey is a general pediatric cardiologist who provides inpatient and outpatient care for children with congenital heart disease. He completed a pediatric cardiology fellowship at Columbia University College of Physicians & Surgeons, New York and Morgan Stanley Children’s Hospital at New York Presbyterian, where he also served as chief pediatric cardiology fellow. He received his medical degree from Marshall University in Huntington, West Virginia and completed his pediatric residency at UMDNJ-Robert Wood Johnson University Hospital and Bristol Myers Squibb Children’s Hospital in New Brunswick, New Jersey.
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Peter Sambatakos, MD

Peter Sambatakos, MD

Pediatric Cardiology
Dr. Sambatakos is a pediatric cardiologist based in Outpatient Care, Pasco, for the Johns Hopkins All Children’s Heart Institute. Previously, he spent three years as a pediatric cardiology clinical fellow and completed a clinical clerkship at the New York-Presbyterian Morgan Stanley Children’s Hospital/Columbia University Medical Center. He also was assistant course director for the medical student and resident elective, member of the Fellow Peer Mentorship Program and co-chaired the Fellowship Quality Improvement Project. Dr. Sambatakos completed his residency in general pediatrics at the University of Miami/Jackson Memorial Holtz Hospital. He earned his Doctorate of Medicine and his bachelor of arts in Chemistry and Biomedical Engineering at Tufts University where he graduated cum laude. He is a member of the Cardiovascular Disease in the Young Council, American Heart Association and the American College of Cardiology.
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Ashish Shah, MD MBA

Ashish Shah, MD MBA

Pediatric Cardiology
Dr. Shah specializes in pediatric cardiology, is co-director of patient safety and quality in the Johns Hopkins All Children’s Heart Institute, and co-chair of the Heart Institute Patient Safety & Quality committee. His areas of focus include noninvasive imaging, general pediatric cardiology and quality improvement. In the 2022 Johns Hopkins Medicine Clinical Awards, Dr. Shah, Dr. James Quintessenza and the Heart Institute Flight Plan won the Innovations in Clinical Care Award for Johns Hopkins All Children’s. Previously he was a pediatric cardiologist with Phoenix Children’s Heart Center, where he was co-director for the Cardiac High Acuity Monitoring Program for Infants and Newborns (CHAMPION) and site leader for the National Pediatric Cardiology Quality Improvement Collaborative. Dr. Shah worked to develop and implement newborn pulse oximetry screening for critical congenital heart disease in newborns across the state and served on the Arizona Department of Health’s Newborn Screening Committee. He was also the physician volunteer for the Nick and Kelly Heart Camp.
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Christopher Talluto, MD

Christopher Talluto, MD

Pediatric Cardiology
Dr. Talluto is a cardiologist in the Johns Hopkins All Children's Heart Institute. He joined the hospital staff in 2021. He specializes in adults with congenital heart defects and adolescents who are transitioning into adult care. Previously, he was an adult congenital cardiologist and a pediatric cardiologist at Fairfax Inova Hospital in Fairfax, Virginia, where he was head of the adult congenital heart disease program and co-director of the exercise physiology lab.
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James Thompson, MD

James Thompson, MD

Pediatric Cardiology
Dr. Thompson specializes in interventional cardiology at Johns Hopkins All Children’s. He joined the hospital staff in 2020. He was previously a pediatric cardiologist and medical director for Child Cardiology Associates in Fairfax, Virginia, and chief of the Division of Pediatric Cardiology of the Inova Heart and Vascular Institute at Inova Fairfax Hospital. He has been a principal investigator for multiple clinical trials for devices to close defects in the heart through catheters rather than open-heart surgery. He has performed device closures of over 1,500 defects.
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Courtney Wein, DO

Courtney Wein, DO

Pediatric Cardiology
Dr. Courtney Wein specializes in pediatric and fetal cardiology at Johns Hopkins All Children’s. She sees patients primarily at the Outpatient Care location in Tampa. She joined the hospital staff in 2020. Dr. Wein earned her medical degree from Philadelphia College of Osteopathic Medicine in Pennsylvania. She then completed a residency in pediatrics at St. Christopher’s Hospital for Children in Philadelphia, followed by a fellowship in pediatric cardiology at Nicklaus Children’s Hospital in Miami with additional training in fetal echocardiography at Mount Sinai Kravis Children’s Hospital in New York City. Her clinical interests include fetal cardiology, preventative medicine and neurodevelopment in children with congenital heart disease.
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