Jonathan Chrispin, M.D., is an Associate Professor of Medicine in the Johns Hopkins Medicine Division of Cardiology, Electrophysiology and Arrhythmia, as well as an Associate Professor of Biomedical Engineering at Johns Hopkins University. Dr. Chrispin focuses on all aspects of clinical electrophysiology, including pacemaker/defibrillator implantation and complex catheter ablation for atrial and ventricular arrhythmias. Dr. Chrispin received his Bachelor of Arts degree from Harvard University. He received his Doctor of Medicine degree from Vanderbilt University. He completed intern and residency training in internal medicine at The Johns Hopkins Hospital, where he also completed a fellowship in cardiovascular disease and served as chief clinical cardiac electrophysiology fellow. He is a member of the American College of Cardiology, the American Heart Association, and the Heart Rhythm Society. Dr. Chrispin directs the Ventricular Arrhythmia Ablation and Research program, focusing on using advanced cardiac imaging to better understand the structural substrate associated with the development of ventricular arrhythmias and using artificial intelligence to improve the risk stratification of sudden cardiac death. Further, he is involved in developing clinical trials to improve the safety and efficacy of catheter ablation for the treatment of ventricular tachycardia. His work has led to Dr. Chrispin publishing in a number of international journals, including Circulation, the Journal of the American College of Cardiology, Heart Rhythm Journal, Nature Cardiovascular Research, Journal of the American Heart Association, and EP Europace. Dr. Chrispin is rated as an Elite provider by MediFind in the treatment of Arrhythmias. His top areas of expertise are Ventricular Tachycardia, Arrhythmias, Sarcoidosis, Cardiac Ablation, and Pacemaker Implantation.

Dr. Hugh Calkins is the Catherine Ellen Poindexter Professor of Cardiology and Director of the Electrophysiology Laboratory and Arrhythmia Service at the Johns Hopkins Hospital. He is an internationally recognized expert on catheter ablation, atrial fibrillation, syncope, arrhythmogenic right ventricular dysplasia (ARVD) and arrhythmia management. Dr. Calkins attended Williams College and Harvard Medical School before training in medicine at Massachusetts General Hospital. He received his cardiology training at Johns Hopkins. His first faculty position was at the University of Michigan, where he directed the Pacemaker Service, and he returned to Johns Hopkins as director of the Arrhythmia Service in 1992. Dr. Calkins is an Associate Editor of the Journal of Cardiovascular Electrophysiology and is on the editorial board of many other cardiology journals. He is a former member of the American Board of Internal Medicine Electrophysiology Boards Test Writing Committee. Dr. Calkins is a fellow of the American College of Cardiology, the American Heart Association and the Heart Rhythm Society. He led a 44-member international task force whose 2012 Expert Consensus Statement gave recommendations for treatment and research of atrial fibrillation. Dr Calkins is a past president of the Heart Rhythm Society and was elected to be a member of the Miler Coulsen Academy of Clinical Excellence in 2014. Dr. Calkins has published more than 500 articles and book chapters on a large variety of cardiac arrhythmias. His research has focused predominantly on catheter ablation, atrial fibrillation, syncope, and arrhythmogenic right ventricular dysplasia. Dr. Calkins has also written extensively on most aspects of heart rhythm disorders and their treatment. Dr. Calkins is rated as an Elite provider by MediFind in the treatment of Arrhythmias. His top areas of expertise are Atrial Fibrillation, Arrhythmias, Cardiomyopathy, Cardiac Ablation, and Heart Transplant.

Degrees: BS: Massachusetts Institute of Technology 1981 Electrical Engineering MS: Massachusetts Institute of Technology 1983 Electrical Engineering PhD: Massachusetts Institute of Technology 1987 Electrical Engineering MD: Harvard 1987 Medicine Professional Appointments: 1987-1988 Intern in Medicine, Brigham and Women's Hospital 1988-1990 Resident in Medicine, Brigham and Women's Hospital 1988-1990 Research Scientist, Harvard M.I.T. Division of H.S.T. 1990-1993 Fellow in Cardiology, Johns Hopkins University 1993-1998 Assistant Professor of Medicine, Johns Hopkins University 1996- Co-Director of Cardiac Electrophysiology, Johns Hopkins Hospital 1998-2005 Associate Professor of Medicine, Johns Hopkins University 2002-2005 Associate Professor of Biomedical Engineering, Johns Hopkins University 2005- Professor of Medicine, Johns Hopkins University 2005- Professor of Biomedical Engineering, Johns Hopkins University. Dr. Berger is rated as an Elite provider by MediFind in the treatment of Arrhythmias. His top areas of expertise are Atrial Fibrillation, Arrhythmias, Ventricular Tachycardia, Cardiac Ablation, and Pacemaker Implantation.

Dr. Andreas S. Barth is an Associate Professor in the Division of Cardiology at the Johns Hopkins School of Medicine and Director of the Center for Inherited Heart Diseases. His clinical work focuses on clinical cardiac electrophysiology with a specific focus on inherited arrhythmia syndromes and channelopathies, including long QT syndrome, Brugada syndrome, CPVT and arrhythmogenic cardiomyopathies. Additionally, Dr. Barth participates in a multidisciplinary clinic at Kennedy Krieger Institute providing Cardiology care to patients with muscular dystrophies and mitochondrial disease. Dr. Barth performs pacemaker and defibrillator implantation and complex catheter ablations for atrial and ventricular arrhythmias. His basic research lab explores the relationship between metabolic and arrhythmogenic ion channel remodeling in heart failure and myotonic dystrophy. Dr. Barth earned a combined doctor of medicine and doctor of philosophy from the Ludwig-Maximilians-University in Munich, Germany. He joined the Johns Hopkins faculty in 2016. He has been recognized with the First Prize for the Stanley L. Blumenthal Cardiology Research Award in Clinical Science in the Division of Cardiology at Johns Hopkins Hospital, and as a Young Investigator Award Finalist of the American Heart Association and Heart Rhythm Society. Dr. Barth is rated as a Distinguished provider by MediFind in the treatment of Arrhythmias. His top areas of expertise are Cardiomyopathy, Arrhythmias, Heart Attack, Cardiac Ablation, and Pacemaker Implantation.

Vikas Kalra is a Cardiac Electrophysiologist and a Cardiologist in Towson, Maryland. Dr. Kalra is rated as an Advanced provider by MediFind in the treatment of Arrhythmias. His top areas of expertise are Atrial Fibrillation, Bidirectional Tachycardia, Catecholaminergic Polymorphic Ventricular Tachycardia, Pacemaker Implantation, and Cardiac Ablation. Dr. Kalra is currently accepting new patients.

Mohammed Kanjwal is a Cardiologist in Baltimore,, Maryland. Dr. Kanjwal is rated as a Distinguished provider by MediFind in the treatment of Arrhythmias. His top areas of expertise are His Bundle Tachycardia, Atrioventricular Nodal Reentrant Tachycardia (AVNRT), Paroxysmal Supraventricular Tachycardia (PSVT), Pacemaker Implantation, and Cardiac Ablation.

Stephen Shorofsky is a Cardiac Electrophysiologist and a Cardiologist in Baltimore, Maryland. Dr. Shorofsky is rated as an Elite provider by MediFind in the treatment of Arrhythmias. His top areas of expertise are Arrhythmias, Ventricular Tachycardia, Paroxysmal Supraventricular Tachycardia (PSVT), Cardiac Ablation, and Pacemaker Implantation. Dr. Shorofsky is currently accepting new patients.

Dr. Stacy Fisher is a cardiologist in Baltimore, Maryland specializing in the care of adult congenital heart disease, pregnancy-related heart disease and congenital heart pulmonary hypertension. She is Associate Director of the Adult Congenital Heart Disease (ACHD) Center at the Johns Hopkins Heart and Vascular Institute and Director of the ACHD Training Program. She is also an Associate Professor of Medicine at the Johns Hopkins University School of Medicine. Her research focus is congenital heart disease in adults including pulmonary hypertension, inherited heart disease and 3D printing translational medicine. She is interested in imaging and using 3D modeling to advance cardiac care and education. Her education includes a Bachelor of Science degree in Microbiology from Miami University in Oxford, Ohio, and a Doctor of Medicine Degree from the University of Maryland School of Medicine in Baltimore, Maryland. She completed an internship and residency in Internal Medicine at Duke University in Durham, North Carolina. Her fellowship in cardiology was at the University of Rochester, Strong Memorial Hospital in Rochester, New York, including serving as the Chief Cardiology Fellow. She was then an Adult Congenital Heart Fellow at the University of Rochester, Strong Memorial Hospital. After completing her fellowship in 2001, she joined a Baltimore cardiology practice and was named Director of Women’s Cardiovascular Services and the Co-Director of the Cardiac Critical Care Unit at Sinai Hospital in Baltimore, positions which she held until 2011. She then joined University of Maryland School of Medicine as Director of Women’s and Complex Heart diseases where she started and directed the Adult Congenital Heart Program and practiced through 2022 when she joined Johns Hopkins. She was recently the President of the American Heart Association’s Greater Maryland Region. Videos Dr. Stacy Fisher. Dr. Fisher is rated as an Advanced provider by MediFind in the treatment of Arrhythmias. Her top areas of expertise are Familial Ventricular Tachycardia, Arrhythmias, Ventricular Tachycardia, Aortic Valve Replacement, and Transcatheter Aortic Valve Replacement (TAVR).

Dr. Aravindan Kolandaivelu is an assistant professor of medicine at Johns Hopkins hospital specializing in cardiac electrophysiology and cardiology. Having more than 16 years of diverse experiences, Dr. Kolandaivelu affiliates with many hospitals including Johns Hopkins Hospital, The Johns Hopkins Bayview Medical Center, and cooperates with other doctors and specialists in medical group Johns Hopkins University. Dr. Kolandaivelu completed a medical degree at Johns Hopkins University School of Medicine and a residency at Stanford University Medical Center in internal medicine. He joined the Johns Hopkins University School of Medicine as a cardiology fellow in 2010. Dr. Aravinda was honored with the 2008 Melvin Judkins Young Investigator Award. Dr. Kolandaivelu is rated as an Advanced provider by MediFind in the treatment of Arrhythmias. His top areas of expertise are Ventricular Tachycardia, Arrhythmias, Paroxysmal Supraventricular Tachycardia (PSVT), Cardiac Ablation, and Pacemaker Implantation.

Dr. Michael J. Blaha MD MPH is Professor of Cardiology and Epidemiology and presently serves as the Director of Clinical Research for the Johns Hopkins Ciccarone Center for the Prevention of Cardiovascular Disease, Director of the Cardiometabolic Clinic, and Program Director for the Preventive Cardiology Fellowship. His clinical interests include primary and secondary prevention of cardiovascular disease, with emphasis on early intervention in patients with advanced subclinical atherosclerosis detected with cardiac computed tomography. Dr. Blaha represents the 4th generation of physicians in his family. After earning a BS in pre-medical studies and classical civilization at the University of Notre Dame in 2001, Dr. Blaha went to Vanderbilt University where in 2006 he received his MD as well as an MPH. in clinical epidemiology and biostatistics. Dr. Blaha then completed his Internal Medicine residency in the Osler Medical Housestaff Training Program at Johns Hopkins in 2009 before completing a fellowship in Cardiology at Johns Hopkins in 2012. In 2018, Dr. Blaha received the Dr. Fred Brancati award at Johns Hopkins for excellence in mentoring. He has mentored over 30 trainees, many of which have gone on to hold prominent academic appointments. In 2021, Dr. Blaha was named to the Clarivate Highly Cited Researcher List, representing the top 1% of world’s researchers, and was first named to the Baltimore Magazine Best Doctors List. In 2022, he received the Arthur S. Agatston Cardiovascular Disease Prevention Award. Clinically, he practices as a preventive cardiologist specializing in cardiometabolic disease and in the interpretation of cardiac CT. His clinic specializes in patients with cardiometabolic disease and advanced subclinical atherosclerosis, and the focused use of an array of lifestyle and pharmacotherapies to mitigate that risk. Dr. Blaha is rated as an Advanced provider by MediFind in the treatment of Arrhythmias. His top areas of expertise are Atherosclerosis, Coronary Heart Disease, High Cholesterol, Metabolic Syndrome, and Percutaneous Coronary Intervention (PCI).

Dr Halperin received the B.S degree in physics with highest distinction from Purdue University, the M.A. degree in physics from the University of California, Berkeley, and the M.D. degree from Louisiana State University, New Orleans, Louisiana. He is a member of Phi Beta Kappa, an Established Investigator and Fellow of the American Heart Association, and a McClure Fellow of the Johns Hopkins University Applied Physics laboratory. Dr. Halperin is currently a Professor of Medicine, Radiology and Biomedical Engineering at the Johns Hopkins Medical Institutions. He is the co-director of the Cardiovascular Imaging Center of Excellence. He serves on the editorial board of the journal Resuscitation, and is a past chair of the national American Heart Association Advanced Cardiovascular Life Support Subcommittee and a past member of the Emergency Cardiac Care Committee. Ten of his students have received young investigator awards from the American Heart Association and Heart Rhythm Society, and he has ongoing support from the National Institutes of Heath for his research programs. He has over 120 peer-reviewed publications and over 20 patents issued. Dr. Halperin is rated as a Distinguished provider by MediFind in the treatment of Arrhythmias. His top areas of expertise are Ventricular Fibrillation, Heart Attack, Ventricular Tachycardia, Cardiac Ablation, and Lithotripsy.

Dr. Allison Hays is a general cardiologist and Medical Director of Echocardiography Programs at the Johns Hopkins Hospital. She is also an assistant professor at the Johns Hopkins University School of Medicine. Dr. Hays graduated from Stanford University with degrees in biology and English. She received her medical training at the Columbia University College of Physicians and Surgeons and did her residency at the New York Presbyterian Hospital at Columbia. Dr. Hays pursued cardiology fellowships at New York University Medical Center and at the Johns Hopkins University School of Medicine. Dr. Hays studies ways to use noninvasive imaging to detect cardiovascular disease. She has advanced multimodality imaging training from Johns Hopkins and attends in the Adult Echocardiography Lab at Johns Hopkins Hospital. In terms of research, she uses Cardiac MRI as a tool to study coronary and systemic endothelial function. Dr. Hays is rated as a Distinguished provider by MediFind in the treatment of Arrhythmias. Her top areas of expertise are Familial Ventricular Tachycardia, Cardiomyopathy, COVID-19, Heart Attack, and Tissue Biopsy.

Joseph Marine, MD, MBA, FACC, FHRS, is a clinical cardiac electrophysiologist who practices primarily at the Johns Hopkins Hospital in Baltimore, Maryland. He is a Professor of Medicine at the Johns Hopkins University School of Medicine and holds appointments as Vice-Director of Operations for the Division of Cardiology and Section Chief of Cardiology for Johns Hopkins Community Physicians. He trained at UC San Francisco Medical School, Brigham and Women’s Hospital/Harvard Medical School, Boston University Medical Center, and Beth Israel Deaconess Medical Center. Dr. Marine has lectured widely on a variety of arrhythmia topics and has served as a co-director of the American College of Cardiology (ACC) Cardiovascular Overview and Board Review Course for 10 years. He currently serves on the ACC Board of Governors and is co-editor of the ACC/HRS EP Self-Assessment Program. He also serves on other committees for the ACC, the Heart Rhythm Society, and MedChi. He is co-author of more than 130 original research and review articles and has served on writing committees for several national cardiology practice and training guidelines. As a clinical cardiac electrophysiologist, Dr. Marine specializes in the diagnosis and treatment of arrhythmias, which are heart rhythm disorders that cause the heart to beat too rapidly, too slowly, or irregularly. His research focuses on further improving the safety and effectiveness of catheter ablation and other treatments for atrial fibrillation and other atrial and ventricular arrhythmias. Dr. Marine is rated as a Distinguished provider by MediFind in the treatment of Arrhythmias. His top areas of expertise are Atrial Fibrillation, Atrioventricular Nodal Reentrant Tachycardia (AVNRT), Arrhythmias, Cardiac Ablation, and Heart Transplant.

Dr. David Douglass Spragg is a Professor of Medicine in the Department of Medicine (Division of Cardiology) at Johns Hopkins. In addition, he is the inaugural Edward St. John Professor of Cardiology. His research focuses on treatments for atrial fibrillation (AF), and particularly on catheter ablation for AF. Dr. Spragg received his undergraduate degree in the Comparative Study of Religion from Harvard College. He earned his medical degree from the College of Physicians and Surgeons at Columbia University. After pursuing a Sarnoff Cardiovascular research fellowship at Brigham and Women's Hospital, Dr. Spragg completed his internship and residency at Massachusetts General Hospital. He came to Johns Hopkins in 2001 for Cardiology and Cardiac EP fellowships. He served as chief fellow for the Cardiology program, and was recognized for his research during fellowship as the Michel Mirowski Cardiology Fellow. Dr. Spragg joined the faculty as an Assistant Professor in 2006, and was promoted to Associate Professor in 2014. He was promoted to the rank of Professor of Medicine in 2024. Besides his teaching and clinical appointments at the Johns Hopkins School of Medicine, Dr. Spragg is the Director of the Johns Hopkins Atrial Fibrillation Research Program. He is a Fellow of the Heart Rhythm Society. Dr. Spragg is rated as a Distinguished provider by MediFind in the treatment of Arrhythmias. His top areas of expertise are Atrial Fibrillation, Arrhythmias, Cardiac Tamponade, Cardiac Ablation, and Pacemaker Implantation.

Nilofar Islam is a Cardiologist in Towson, Maryland. Dr. Islam is rated as an Advanced provider by MediFind in the treatment of Arrhythmias. Her top areas of expertise are Atrial Fibrillation, Familial Progressive Cardiac Conduction Defect, Sick Sinus Syndrome, Pacemaker Implantation, and Cardiac Ablation.

Thomas Guarnieri is a Cardiologist in Towson,, Maryland. Dr. Guarnieri is rated as an Advanced provider by MediFind in the treatment of Arrhythmias. His top areas of expertise are Inappropriate Sinus Tachycardia (IST), Familial Ventricular Tachycardia, Atrial Fibrillation, and Arrhythmias.

James Porterfield is a Cardiologist in Towson,, Maryland. Dr. Porterfield is rated as an Advanced provider by MediFind in the treatment of Arrhythmias. His top areas of expertise are Atherosclerosis, Coronary Heart Disease, Atrial Fibrillation, and Angina.

Jeremy Pollock is a Cardiologist in Towson, Maryland. Dr. Pollock is rated as an Advanced provider by MediFind in the treatment of Arrhythmias. His top areas of expertise are Heart Failure with Preserved Ejection Fraction (HFpEF), Atrial Fibrillation, Heart Attack, and Apoplexy.

Mark Kelemen is a Cardiologist in Baltimore, Maryland. Dr. Kelemen is rated as an Advanced provider by MediFind in the treatment of Arrhythmias. His top areas of expertise are Apoplexy, Pulmonary Edema, Heart Failure, Heart Attack, and Pacemaker Implantation.

Dr. Reed David Riley is an assistant professor of medicine at the Johns Hopkins University School of Medicine and chief of cardiology at the Greater Baltimore Medical Center. Dr. Riley received his undergraduate degree from Duke University. He earned a medical degree from The Johns Hopkins University School of Medicine and completed a residency at Johns Hopkins Hospital. Prior to joining Johns Hopkins in 2007, Dr. Riley was a cardiology fellow at Duke University and staff cardiologist at Sinai Hospital of Baltimore. He is currently also a teaching attending on the Osler Medical Service’s Barker Firm at the Johns Hopkins Hospital. Dr. Riley is rated as an Experienced provider by MediFind in the treatment of Arrhythmias. His top areas of expertise are Heart Attack, Atrial Fibrillation, Apoplexy, and Angina.