Kanishka Ratnayaka, M.D.


3020 Children's Way
MC 5004
San Diego, CA 92123




Rady Children's Specialists of San Diego

Medical Group / IPA

Rady Children's Specialists

Medical School

Emory University School of Medicine


Children's National Medical Center


Children's National Medical Center, National Institutes of Health, NIH

Board Certifications

Pediatric Cardiology, Pediatrics


Dr. Kanishka Ratnayaka is a board-certified pediatric cardiologist at Rady Children's Hospital-San Diego and an associate clinical professor of pediatrics at UC San Diego School of Medicine.

Dr. Ratnayaka earned his medical degree at Emory University School of Medicine before completing his residency and fellowship at Children's National Medical Center. His medical education includes sub-specialty training in pediatric/congenital interventional cardiac catheterization and interventional cardiac MRI and his clinical practice focuses on congenital and structural heart interventions. He has been invited to give numerous plenary talks on interventional cardiovascular MRI for organizations including the American College of Cardiology, American Heart Association and the Society for Cardiovascular Magnetic Research.

In addition to his clinical practice, Dr. Ratnayaka worked in research collaboration with the National Heart, Lung, and Blood Institute and the National Institutes of Health on interventional cardiovascular MRI for 10 years. He became the principal investigator for an interventional cardiovascular MRI research program, successfully performing clinical trials of radiation-free cardiac catheterization guided by real-time MRI and X-Ray fused with MRI. He has authored over 35 peer-reviewed manuscripts on key topics in his field such as X-ray fused with MRI, MRI-guided heart catheterization, MRI-guided intervention and MRI device innovation. Dr. Ratnayaka's other research work includes device development for novel applications, bioabsorbable stents for pediatric use, invasive pericardiology and fetal cardiac MRI. He holds several patents and has won many awards for his original research.

Dr. Ratnayaka is a founding member and vice president of World Children's Initiative, a 501(c)(3) charitable organization geared toward implementing innovative healthcare and education projects for children around the world. Its current focus is Project Heart: Uganda, an initiative to build a sustainable cardiac catheterization program to diagnose and treat children with heart disease at Mulago Hospital in Kampala, Uganda.


Real-time magnetic resonance imaging guidance improves the diagnostic yield of endomyocardial biopsy.
Rogers T, Ratnayaka K, Karmarkar P, Campbell-Washburn AE, Schenke WH, Mazal JR, Kocaturk O, Faranesh AZ, Lederman RJ

Magnetic Resonance Imaging-Guided Transcatheter Cavopulmonary Shunt.
Ratnayaka K, Rogers T, Schenke WH, Mazal JR, Chen MY, Sonmez M, Hansen MS, Kocaturk O, Faranesh AZ, Lederman RJ

Transcatheter Myocardial Needle Chemoablation During Real-Time Magnetic Resonance Imaging: A New Approach to Ablation Therapy for Rhythm Disorders.
Rogers T, Mahapatra S, Kim S, Eckhaus MA, Schenke WH, Mazal JR, Campbell-Washburn A, Sonmez M, Faranesh AZ, Ratnayaka K, Lederman RJ

Interventional-Cardiovascular MR: Role of the Interventional MR Technologist.
Mazal JR, Rogers T, Schenke WH, Faranesh AZ, Hansen M, O'Brien K, Ratnayaka K, Lederman RJ

Segmented nitinol guidewires with stiffness-matched connectors for cardiovascular magnetic resonance catheterization: preserved mechanical performance and freedom from heating.
Basar B, Rogers T, Ratnayaka K, Campbell-Washburn AE, Mazal JR, Schenke WH, Sonmez M, Faranesh AZ, Lederman RJ, Kocaturk O

Characterizing the angiogenic activity of patients with single ventricle physiology and aortopulmonary collateral vessels.
Sandeep N, Uchida Y, Ratnayaka K, McCarter R, Hanumanthaiah S, Bangoura A, Zhao Z, Oliver-Danna J, Leatherbury L, Kanter J, Mukouyama YS

Image Fusion Guided Device Closure of Left Ventricle to Right Atrium Shunt.
Grant EK, Faranesh AZ, Cross RR, Olivieri LJ, Hamann KS, O'Brien KJ, Hansen MS, Donofrio MT, Lederman RJ, Ratnayaka K, Slack MC

Optimized protocols for cardiac magnetic resonance imaging in patients with thoracic metallic implants.
Olivieri LJ, Cross RR, O'Brien KE, Ratnayaka K, Hansen MS

Fully percutaneous transthoracic left atrial entry and closure as a potential access route for transcatheter mitral valve interventions.
Rogers T, Ratnayaka K, Schenke WH, Sonmez M, Kocaturk O, Mazal JR, Chen MY, Flugelman MY, Troendle JF, Faranesh AZ, Lederman RJ

Transatrial intrapericardial tricuspid annuloplasty.
Rogers T, Ratnayaka K, Sonmez M, Franson DN, Schenke WH, Mazal JR, Kocaturk O, Chen MY, Faranesh AZ, Lederman RJ

Intentional right atrial exit for microcatheter infusion of pericardial carbon dioxide or iodinated contrast to facilitate sub-xiphoid access.
Rogers T, Ratnayaka K, Schenke WH, Faranesh AZ, Mazal JR, O'Neill WW, Greenbaum AB, Lederman RJ

Effect of mechanical assistance of the systemic ventricle in single ventricle circulation with cavopulmonary connection.
Sinha P, Deutsch N, Ratnayaka K, Lederman R, He D, Nuszkowski M, Montague E, Mikesell G, Ishibashi N, Zurakowski D, Jonas R

Renal artery stenosis in children: therapeutic percutaneous balloon and stent angioplasty.
Colyer JH, Ratnayaka K, Slack MC, Kanter JP

MRI catheterization in cardiopulmonary disease.
Rogers T, Ratnayaka K, Lederman RJ

Real-time cardiovascular magnetic resonance subxiphoid pericardial access and pericardiocentesis using off-the-shelf devices in swine.
Halabi M, Faranesh AZ, Schenke WH, Wright VJ, Hansen MS, Saikus CE, Kocaturk O, Lederman RJ, Ratnayaka K

Aortic access from the vena cava for large caliber transcatheter cardiovascular interventions: pre-clinical validation.
Halabi M, Ratnayaka K, Faranesh AZ, Chen MY, Schenke WH, Lederman RJ

Integration of cardiac and respiratory motion into MRI roadmaps fused with x-ray.
Faranesh AZ, Kellman P, Ratnayaka K, Lederman RJ

Transthoracic delivery of large devices into the left ventricle through the right ventricle and interventricular septum: preclinical feasibility.
Halabi M, Ratnayaka K, Faranesh AZ, Hansen MS, Barbash IM, Eckhaus MA, Wilson JR, Chen MY, Slack MC, Kocaturk O, Schenke WH, Wright VJ, Lederman RJ

Specialized delivery room planning for fetuses with critical congenital heart disease.
Donofrio MT, Levy RJ, Schuette JJ, Skurow-Todd K, Sten MB, Stallings C, Pike JI, Krishnan A, Ratnayaka K, Sinha P, duPlessis AJ, Downing DS, Fries MI, Berger JT

Real-time MRI-guided right heart catheterization in adults using passive catheters.
Ratnayaka K, Faranesh AZ, Hansen MS, Stine AM, Halabi M, Barbash IM, Schenke WH, Wright VJ, Grant LP, Kellman P, Kocaturk O, Lederman RJ

Active delivery cable tuned to device deployment state: enhanced visibility of nitinol occluders during preclinical interventional MRI.
Bell JA, Saikus CE, Ratnayaka K, Barbash IM, Faranesh AZ, Franson DN, Sonmez M, Slack MC, Lederman RJ, Kocaturk O

Hemodynamic Modeling of Surgically Repaired Coarctation of the Aorta.
Olivieri LJ, de Zélicourt DA, Haggerty CM, Ratnayaka K, Cross RR, Yoganathan AP

Closed-chest transthoracic magnetic resonance imaging-guided ventricular septal defect closure in swine.
Ratnayaka K, Saikus CE, Faranesh AZ, Bell JA, Barbash IM, Kocaturk O, Reyes CA, Sonmez M, Schenke WH, Wright VJ, Hansen MS, Slack MC, Lederman RJ

Direct percutaneous left ventricular access and port closure: pre-clinical feasibility.
Barbash IM, Saikus CE, Faranesh AZ, Ratnayaka K, Kocaturk O, Chen MY, Bell JA, Virmani R, Schenke WH, Hansen MS, Slack MC, Lederman RJ

A deflectable guiding catheter for real-time MRI-guided interventions.
Bell JA, Saikus CE, Ratnayaka K, Wu V, Sonmez M, Faranesh AZ, Colyer JH, Lederman RJ, Kocaturk O

See the full listing of this physician's publications on PubMed, a service of the National Library of Medicine.

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