Faculty Research

The Heart Institute Research Committee:

John W. Moore, M.D., M.P.H.

Dr. Moore’s major clinical and research focus is congenital and structural interventional cardiology.

Christopher Davis, M.D., Ph.D.

Dr. Davis’ research interests include studying exercise physiology of patients with congenital heart disease, athlete’s heart and diseases that cause sudden cardiac death in the young.

Paul Grossfeld, M.D.

Dr. Grossfeld’s research is focused on understanding the genetic basis of congenital heart disease. His primary interest is Jacobsen syndrome, a rare chromosomal disorder caused by the deletions in chromosome 11. Dr. Grossfeld has determined that loss of the ETS-1 gene causes hypoplastic left heart syndrome and other congenital heart defects in Jacobsen syndrome.

Heather Sun, M.D.

Dr. Sun’s clinical and research interests include improved prenatal diagnosis and management of fetal congenital heart disease and non-traditional methods of functional cardiac assessment.

Co-Directors of Research

Kanishka Ratnayaka, M.D.

Dr. Ratnayaka’s research includes diagnostic MRI, MRI catheterization, X-ray fused with MRI (XFM,) MRI-guided intervention and MRI device innovation.

Sanjeet Hegde, M.D., Ph.D.

Dr. Hegde’s research interests include in-vitro measurement of the safety of devices for interventional MRI, development of catheters and in-vitro testing of their suitability for interventional MRI, device implantation under XMR, catheter tracking under MRI, image guidance of cardiac interventions, 3-D printing, virtual reality and computational modeling of complex congenital heart disease.


Tommy Do, MD, MS

Dr. Do has a special interest in outcomes research for patients in the CVICU in addition to looking at markers to predict liver dysfunction in single ventricle patients post Fontan palliation.

Howaida El-Said, MD, PhD

Dr. El-Said's research interest include 3D angiography to facility catheterization procedures,  modifying Stents to suit growing children, percutaneous valve development, innovative interventional techniques to avoid surgery, adult congenital Fontan patients, and bioengineering of special wires to facilitate cath procedures.  

Brian Fagan, MD

Dr. Fagan's research includes investigation of Ebstein's anomaly of the tricuspid valve.

Hari Narayan, MD

Dr. Narayan's research is focused on the cardiotoxic effects of cancer therapies. He is interested in characterizing the natural history and risk factors for the development of cardiomyopathy after cancer therapy and determining the optimal diagnostic and management strategies for this disease.

James Perry, MD

Dr. Perry is interested in clinical and translational research projects on antiarrhythmic drugs, catheter ablation, adult congenital heart arrhythmias, computational modeling of congenital heart disease, innovative device designs, bioengineering and electrophysiology, cardiac genomics and channelopathies.

Matthew Williams, MD

Dr. Williams has clinical and research interests related to the diagnosis and management of cardiac rhythm disturbances from fetal to adult life, including non-invasive and invasive monitoring and diagnostic techniques, antiarrhythmic medications, catheter-based therapies for arrhythmias, heritable arrhythmia syndromes, rhythm disturbances associated with congenital heart disease and pacemaker and ICD implantation and programming. 

Cardiovascular Surgery

John Nigro, MD

Dr. Nigro's research interests include outcome analysis, especially for patients with Hypoplastic Left Heart Syndrome, cerebral blood flow and 3-D simulation and imaging.