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 a Distinguished provider by MediFind in the treatment of Ventricular Fibrillation. 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 a Distinguished provider by MediFind in the treatment of Ventricular Fibrillation. His top areas of expertise are Atrial Fibrillation, Arrhythmias, Ventricular Tachycardia, Cardiac Ablation, and Pacemaker Implantation.

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 Ventricular Fibrillation. His top areas of expertise are Ventricular Fibrillation, Heart Attack, Ventricular Tachycardia, Cardiac Ablation, and Lithotripsy.

James Weiss is a Cardiologist in Baltimore, Maryland. Dr. Weiss is rated as a Distinguished provider by MediFind in the treatment of Ventricular Fibrillation. His top areas of expertise are Ventricular Fibrillation, Low Potassium Level, Heart Attack, Arrhythmias, and Cardiac Ablation.

Roy Beinart is a Cardiologist in Baltimore, Maryland. Dr. Beinart is rated as a Distinguished provider by MediFind in the treatment of Ventricular Fibrillation. His top areas of expertise are Atrial Fibrillation, Ventricular Fibrillation, Ventricular Tachycardia, Pacemaker Implantation, and Cardiac Ablation.

Bassim Badro is a Cardiologist in Glen Burnie,, Maryland. Dr. Badro is rated as an Experienced provider by MediFind in the treatment of Ventricular Fibrillation. His top areas of expertise are Cardiomyopathy, Arrhythmias, Dilated Cardiomyopathy (DCM), Heart Failure, and Pacemaker Implantation.

Asghar Fakhri is a Cardiologist in Glen Burnie, Maryland. Dr. Fakhri is rated as an Experienced provider by MediFind in the treatment of Ventricular Fibrillation. His top areas of expertise are Atrial Fibrillation, Pulmonary Edema, Heart Failure, and Heart Failure with Preserved Ejection Fraction (HFpEF).

Ratnakar Mukherjee is an Interventional Cardiologist in Glen Burnie,, Maryland. Dr. Mukherjee is rated as an Experienced provider by MediFind in the treatment of Ventricular Fibrillation. His top areas of expertise are Heart Attack, Arterial Embolism, Apoplexy, Pacemaker Implantation, and Endoscopy.

Abid Fakhri is a Cardiologist in Glen Burnie,, Maryland. Dr. Fakhri is rated as an Experienced provider by MediFind in the treatment of Ventricular Fibrillation. His top areas of expertise are Heart Failure, Pulmonary Edema, Heart Failure with Preserved Ejection Fraction (HFpEF), and Atrial Fibrillation.

Andrew Zohlman is a Cardiologist in Glen Burnie,, Maryland. Dr. Zohlman is rated as an Experienced provider by MediFind in the treatment of Ventricular Fibrillation. His top areas of expertise are Atrial Fibrillation, Cardiomyopathy, Bidirectional Tachycardia, Pacemaker Implantation, and Cardiac Ablation.

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 an Advanced provider by MediFind in the treatment of Ventricular Fibrillation. His top areas of expertise are Atrial Fibrillation, Atrioventricular Nodal Reentrant Tachycardia (AVNRT), Arrhythmias, Cardiac Ablation, and Heart Transplant.

Dr. Katherine Wu is a general cardiologist for the Heart and Vascular Institute at Johns Hopkins Medicine with an interest in caring for patients with cardiomyopathies, coronary artery disease, and valvular heart disease as well as those interested in cardiovascular prevention. She has additional expertise in non-invasive cardiology imaging techniques. Dr. Wu received her medical degree from the University of Pennsylvania Health System School of Medicine, and completed her residency and a cardiology fellowship at the Johns Hopkins University School of Medicine. She joined the School of Medicine faculty in 2000. Dr. Wu's research interests include improving individualized risk prediction for sudden cardiac death and heart failure by developing and validating methods that incorporate novel cardiac imaging indices. Her lab is funded by the NIH/NHLBI. Dr. Wu has more than 70 peer-reviewed publications and serves on the editorial board of the Journal of Cardiovascular Magnetic Resonance and Circulation Cardiovascular Imaging and is a standing member of the NIH Clinical and Integrative Cardiovascular Sciences Study Section. Dr. Wu is rated as an Advanced provider by MediFind in the treatment of Ventricular Fibrillation. Her top areas of expertise are Cardiomyopathy, Atrial Fibrillation, Heart Attack, and Pulmonary Hypertension.

Dr. Nisha A. Gilotra is a cardiologist in the Johns Hopkins Medicine Division of Cardiology with expertise in advanced heart failure, including the care of heart transplant and ventricular assist device patients. Dr. Gilotra specializes in inflammatory cardiomyopathies, including sarcoidosis, myocarditis and inherited causes of cardiomyopathy. Dr. Gilotra received her medical degree from Jefferson Medical College in Philadelphia, PA. She completed her medical residency, general cardiology fellowship and advanced heart failure fellowship at Johns Hopkins University School of Medicine. Between fellowships, she served as an Assistant Chief of Service for the Department of Medicine. Dr. Gilotra is rated as an Advanced provider by MediFind in the treatment of Ventricular Fibrillation. Her top areas of expertise are Sarcoidosis, Myocarditis, Cardiomyopathy, Heart Transplant, and Endoscopy.

Dr. Richard (Rick) Carrick is a general cardiologist in the Johns Hopkins Division of Medicine and is an assistant professor of medicine at the Johns Hopkins School of Medicine. He also serves as associate director of the Johns Hopkins Hypertrophic Cardiomyopathy Center of Excellence. Originally from Massachusetts, he completed his medical training as well as a Ph.D. in Bioengineering at the University of Vermont and did his internal medicine residency training at Tufts Medical Center in Boston, MA. He completed his Cardiovascular Disease Fellowship and a T32 Research Fellowship at Johns Hopkins. His research focuses on the use of advanced computational techniques like machine-learning and artificial intelligence to improve risk stratification in patients with inherited heart disease. Clinically, he specializes in echocardiography and the care of patients with hypertrophic cardiomyopathy (HCM) and other genetic cardiomyopathies. Dr. Carrick is rated as an Advanced provider by MediFind in the treatment of Ventricular Fibrillation. His top areas of expertise are Cardiomyopathy, Hypertrophic Cardiomyopathy (HCM), Ventricular Tachycardia, Arrhythmias, and Cardiac Ablation.

Dr. Myron Weisfeldt is Professor of Medicine and Medical Consultant for Johns Hopkins Technology Ventures. In this position, he provides advice on strategies and evaluation of intellectual property of Johns Hopkins faculty. From 2001 to 2014 Dr. Weisfeldt was the William Osler Professor of Medicine and Chairman of the Department of Medicine at Johns Hopkins School of Medicine. He was also Physician-in-Chief of the Johns Hopkins Hospital. Dr. Weisfeldt received a BA and MD from the Johns Hopkins University. He trained in Cardiology at the Massachusetts General Hospital and the National Institutes of Health and from 1975 to 1991, was Director of the Cardiology Division at the Johns Hopkins. From 1991 to 2001, he was Chairman of the Department of Medicine and Samuel Bard Professor of Medicine at the Columbia University College of Physicians and Surgeons and Director of the Medical Service at the Columbia-Presbyterian Campus of the New York Presbyterian Hospital. Dr. Weisfeldt was Chairman of the Cardiology Advisory Board of the National Heart Lung and Blood Institute from 1987 to 1990 and held the position of President of the American Heart Association in 1990. He is a member of the National Academy of Medicine. His research interests have included heart function, age changes in the heart and circulation, and cardiopulmonary resuscitation. From 2005 to 2018 he was study chair for a large-scale ongoing clinical trials network to conduct randomized definitive trials of devices, drugs and other therapies for out-of-hospital cardiac arrest and severe traumatic injury sponsored by NHLBI and others. The network was called Resuscitation Outcomes Consortium. In November 2022 he will be awarded the Eugene Braunwald Mentoring Award of the American Heart Association. Contact for Research Inquiries1812 Ashland Avenue Suite 110 Baltimore, MD 21205 Email Address: mlw5@jhmi.edu. Dr. Weisfeldt is rated as an Advanced provider by MediFind in the treatment of Ventricular Fibrillation. His top areas of expertise are Cardiac Arrest, Ventricular Fibrillation, Paroxysmal Supraventricular Tachycardia (PSVT), and Ventricular Tachycardia.

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 an Advanced provider by MediFind in the treatment of Ventricular Fibrillation. His top areas of expertise are Atrial Fibrillation, Arrhythmias, Cardiac Tamponade, Cardiac Ablation, and Pacemaker Implantation.

Dr. Sammy Zakaria is an Associate Professor of Medicine at the Johns Hopkins University School of Medicine (JHUSOM). Because he specializes in critical care cardiology, he predominately works in the Cardiac Intensive Care Unit (CICU) at the Johns Hopkins Bayview Medical Center (JHBMC) as well as the Cardiac Care Unit at Johns Hopkins Hospital (JHH). He also serves as the Director of the JHBMC CICU. His practice encompasses most of cardiology, with many of his patients having had life-threatening cardiac issues, such as shock, end-stage heart failure, or multi-organ system failure. He also has an interest in caring for pregnant women with cardiovascular disease, including those with severe preeclampsia, and his clinical research efforts focus on the effects of preeclampsia on the cardiovascular system. Additionally, his other research areas of interest include critical care issues affecting cardiac patients and studying innovations in medical education. Dr. Zakaria is heavily involved in medical education and serves as an educator for students, residents, fellows, and staff. He served as a JHUSOM Colleges Advisor for 10 years and was responsible for teaching and mentoring a cohort of medical students during their time in medical school. In his role as Interim Program Director for the JHBMC Internal Medicine Residency Program, he has helped to increase the JHBMC Internal Medicine residency program’s nationally-recognized reputation for excellence by championing curricular innovations, resident scholarly work, and resident academic careers. He also is a Core Faculty member for the JHH Osler Internal Medicine residency program and for the Johns Hopkins Cardiovascular Disease fellowship. As a result of his efforts in education, he has been honored with multiple teaching awards, including the Outstanding Achievement in Teaching Award from the Johns Hopkins Institute for Excellence in Education. Dr. Zakaria earned his undergraduate degree from the Pennsylvania State University, his medical degree from Jefferson Medical College, and his master of public health degree from the University of Maryland. He trained at Thomas Jefferson University Hospital in Internal Medicine and also practiced there as a faculty attending for one year. He then completed a fellowship in cardiovascular disease at the University of Maryland and subsequently a Critical Care Medicine fellowship at the University of California San Francisco. He joined the Johns Hopkins faculty in 2008. Dr. Zakaria is rated as an Advanced provider by MediFind in the treatment of Ventricular Fibrillation. His top areas of expertise are Apoplexy, Heart Attack, Arterial Embolism, Inappropriate Sinus Tachycardia (IST), and Pacemaker Implantation.

Magdi Saba is a Cardiologist in Baltimore,, Maryland. Dr. Saba is rated as an Advanced provider by MediFind in the treatment of Ventricular Fibrillation. His top areas of expertise are Ventricular Tachycardia, Arrhythmias, Ventricular Fibrillation, Paroxysmal Supraventricular Tachycardia (PSVT), and Cardiac Ablation.

Bradley Maron is a Cardiologist in Baltimore,, Maryland. Dr. Maron is rated as an Experienced provider by MediFind in the treatment of Ventricular Fibrillation. His top areas of expertise are Pulmonary Hypertension, Hypertension, Heart Failure, Hypertrophic Cardiomyopathy (HCM), and Heart Transplant.

Nino Isakadze is a Cardiologist in Baltimore, Maryland. Dr. Isakadze is rated as an Experienced provider by MediFind in the treatment of Ventricular Fibrillation. Her top areas of expertise are Atrial Fibrillation, Vasoconstriction, Ventricular Fibrillation, Atrial Septal Defect (ASD), and Cardiac Ablation.