Our Physician Team



Doctors of Fort Lauderdale Cath Lab

With decades of combined clinical and procedural experience, the board-certified physicians at Fort Lauderdale Heart & Rhythm Center have the medical expertise to take care of you and your loved ones. Our physicians give each patient the individual attention they deserve – with the patience and professionalism you would expect from some of the leaders in their respective fields. In addition, our doctors appreciate the significance of each procedure and we always take the time to educate our patients so that they feel comfortable from the moment they enter our doors to the time they are released.


Dr. David N Kenigsberg

David N. Kenigsberg, MD, FACC, FHRS is a clinical cardiac electrophysiologist who has been practicing electrophysiology in South Florida since 2007. He is a founding member of Florida Heart Rhythm Specialists, PLLC, a practice that provides high level electrophysiology services to a large part of Broward County.

Dr. Kenigsberg is the medical director of the electrophysiology laboratory at Westside Regional Medical Center in Plantation, Florida. His academic roles include serving as a Clinical Assistant Professor in the Division of Cardiology at Nova Southeastern University and a Clinical Preceptor for the Master of Science in Physician Assistant Program at Keiser University.

Dr. Kenigsberg received his Bachelor of Science degree from the University of Miami and his medical degree from the University of Miami School of Medicine in the prestigious six-year Honors Program in Medical Education. Subsequently, he performed his residency at Jackson Memorial Hospital in Miami, Florida. Dr. Kenigsberg then went on to cardiology fellowship at Henry Ford Hospital in Detroit, Michigan, where he served as the Chief Cardiology Fellow. Finally, he completed his training with a two year electrophysiology fellowship at Virginia Commonwealth University/Medical College of Virginia in Richmond. Dr. Kenigsberg is currently Board Certified in Internal Medicine, Cardiovascular Disease and Clinical Cardiac Electrophysiology.

Dr. Kenigsberg has published numerous scholarly articles in peer-reviewed medical journals on many topics germane to electrophysiology. He has been the primary investigator/co-investigator in a myriad of clinical trials involving device and lead development and device programming. In addition, Dr. Kenigsberg has been involved in the development of intellectual property utilizing cardiac devices for early detection of patients at risk for a heart attack.

Dr. Kenigsberg is a fellow of the American College of Cardiology and the Heart Rhythm Society. He serves on the Board of Directors of the Florida Chapter of the American College of Cardiology and the Broward County Medical Association. He is also on the Board of Directors of the Holocaust Documentation and Education Center.

Dr. Kenigsberg’s clinical interests involve ablation of supraventricular and ventricular Cardiac arrhythmias and the implantation of monitors, pacemakers and defibrillators. Dr. Kenigsberg specializes in the ablation of more complex arrhythmias including atrial fibrillation and ventricular tachycardia. He is skilled at implanting cardiac resynchronization devices that require coronary sinus lead placement. He is on staff at eight hospitals in Broward County and one in Palm Beach County.

David Kenigsberg, M.D., Florida Heart Rhythm Specialists
1841 NE 45th St, Fort Lauderdale, FL 33308, (954) 678-9531 / https://flahrs.com/


Dr. Ahmed F Osman

Dr. Ahmed F. Osman, MD, FACC, FASE, FESC, FHRS is a clinical cardiac electrophysiologist in practice in Broward County since December 2004. He is a founding member of the Florida Heart Rhythm Specialists, PLLC. He is the Medical Director of the EP Lab at Broward General Medical Center in Fort Lauderdale, Florida and is a Clinical Assistant Professor at the NOVA Southeastern University School of Medicine.

Dr. Osman graduated with honors from the Faculty of Medicine of the Cairo University, Kasr El Eini Hospital, Cairo, Egypt.He then completed his internal medicine training at the Norwalk Hospital/Yale University program in Connecticut. He received extensive training in the cardiovascular medicine program at The Ochsner Medical Foundation in New Orleans, Louisiana. His electrophysiology fellowship was completed at the University of Maryland Medical Center in Baltimore, Maryland, where he also served as assistant lecturer at the Department of Medicine.

Dr. Osman is board certified in internal medicine, cardiovascular medicine, clinical cardiac electrophysiology, nuclear cardiology and echocardiography. He is an active member and fellow in many professional societies including the American Colleges of Physicians (ACP) and Cardiology (ACC), Societies of Nuclear Cardiology (ASNC) and Echocardiography (ASE), Medical (AMA) and Heart Associations (AHA), Heart Rhythm Society (HRS) and European Society of Cardiology (ESC).

He has multiple peer reviewed publications in the fields of heart failure and non-invasive risk assessment for sudden death. He is an active clinical investigator in several multicenter studies assessing optimization of pacemaker and defibrillator therapy in patients with heart failure and at risk for sudden death.

Dr. Osman specializes in cardiac ablation for curative intervention on rhythm disturbances including atrial fibrillation and ventricular arrhythmias. He also offers all aspects of cardiac device therapies, from implantation of pacemakers and defibrillators, including “biventricular” therapies, to post-implant follow-up and optimization of programming. He has practicing privileges at most North Broward County hospitals.

Ahmed Osman, M.D.
Florida Heart Rhythm Specialists
1841 NE 45th St, Fort Lauderdale, FL 33308, (954) 678-9531 / https://flahrs.com/

Affiliated Cardiologists


Kenneth Zelnick, M.D.

Kenneth Zelnick, M.D., is a Cardiovascular Disease doctor and Interventional Cardiologist who practices at Kenneth H Zelnick Md, PA located at 4101 NW 4th St in Suite 104 in Plantation, Plantation, FL 33317 Office Phone 954-681-4088.


Kathir Selvan Subramanian, M.D.

Kathir Selvan Subramanian, M.D. is a cardiovascular disease doctor and interventional cardiologist who practices at Kenneth H Zelnick Md, PA located at 4101 NW 4th St in Suite 104 in Plantation, Plantation, FL 33317 Office Phone 954-681-4088.


Mazhar Majid ,M.D., F.A.C.C. , F.A.C.P. , F.S.C.A.I. , F.A.S.A. ,M.R.C.P. (U.A.E.)

Mazhar Majid, M.D., F.A.C.C. , F.A.C.P. , F.S.C.A.I. , F.A.S.A. ,M.R.C.P. (U.A.E) is board certified in Internal Medicine, Cardiovascular Disease and Interventional Cardiology. His office is located at 7737 N University Dr. Suite 104 Tamarac, FL. 33321 Office Phone: 954-720-1930 (Broward County) Majidmdpa.com. 



Frederick M. Chaleff, M.D.

Frederick M. Chaleff, M.D. is a Cardiovascular Disease and Interventional Cardiologists who practices at Cardiology Consultants Of West Broward located at 7050 NW 4th St #101, Plantation, FL 33317 Office Phone 954-587-4112.

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