Steven M. Markowitz, M.D.

Clinical Cardiac Electrophysiology
Steven Markowitz

As a cardiologist who specializes in heart rhythm abnormalities, I have witnessed dramatic changes in our understanding of arrhythmias and in treatment possibilities to improve health and longevity of our patients.Treatments that are now considered routine were unimaginable when I started my medical career. I am fortunate to have access to the latest advances in technology and a highly trained, professional team that shares a common goal of achieving optimal outcomes in patient care. But more importantly, my colleagues and I recognize that treating a patient with heart rhythm ailments requires attention not only to technical considerations but also to coping with the impact of arrhythmias on lifestyle and overall wellbeing. In this specialty, we have the ability to provide therapies that not only prolong life but also improve its quality.

My practice is devoted to treatment of patients with arrhythmias, including rapid heart rhythms such as atrial fibrillation and flutter, supraventricular tachycardia, and ventricular tachycardia. I also treat patients with abnormally slow heart rhythms (known as bradycardia). I perform interventional procedures aimed at alleviating these conditions, specifically catheter ablation, pacemaker implantation, defibrillator implantation, and cardiac resynchronization therapy.

Dr. Markowitz specializes in treating patients with arrhythmias (abnormal heart rhythms) and provides care in all aspects clinical electrophysiology. This includes the evaluation of patients with the following conditions:

-Supraventricular arrhythmias such as atrial fibrillation, atrial flutter, atrial tachycardia, supraventricular tachycardia, and Wolff Parkinson White syndrome

-Ventricular arrhythmias such as ventricular ectopy (PVCs), ventricular tachycardia, and ventricular fibrillation

-Syncope (fainting)


-Patients at high risk for sudden cardiac death, such as those with structural heart disease and those with a high-risk congenital condition (e.g., long QT syndrome, hypertrophic cardiomyopathy, Brugada syndrome, etc.)

-Patients with structural heart disease and refractory congestive heart failure


Dr. Markowitz performs the following procedures for management of patients suffering from any of the above conditions:

-Diagnostic electrophysiologic testing

-Radiofrequency and cryoablation ablation for all types of supraventricular and ventricular arrhythmias

-Implantation of pacemakers, defibrillators and cardiac resynchronization devices, and loop recorders

-Laser lead extraction of pacemaker and defibrillator leads

-Electrical cardioversion

-Tilt table testing


A summary of Dr. Markowitz's Education, Training and/or Faculty Appointments is listed as following:

1988   M.D. - Harvard Medical School

1989   Internship, Internal Medicine - The New York Hospital

1992   Residency, Internal Medicine - The New York Hospital

1995   Fellowship, Cardiology - The New York Hospital - CUMC

1996   Fellowship, Cardiac Electrophysiology - The New York Hospital - CUMC


Insurance Plans Accepted

The following represents most of the managed care plans accepted by this physician. If your insurance carrier does not appear here please contact the physician’s office as they may have individual contracts not included on this site.

* indicates this physician is no longer accepting new patients with this insurance plan.

  • AETNA [Medicare]
  • Aetna - Weill Cornell [POS]
  • Affinity Essential
  • Affinity Health Plan
  • Blue Priority Network
  • Emblem Select Care
  • Empire Blue Cross/Blue Shield [Pathway X]
  • Empire Blue Cross/Blue Shield [Pathway X Enhanced]
  • Empire Blue Cross/Blue Shield [PPO]
  • Empire Blue Cross/Blue Shield [EPO]
  • Empire Blue Cross/Blue Shield [HMO]
  • Empire Blue Cross/Blue Shield [Mediblue (Senior)]
  • Fidelis Care
  • GHI [CBP]
  • Health First
  • Health Insurance Plan of NY (HIP) [Medicare]
  • Health Insurance Plan of NY (HIP) [Medicaid]
  • Health Insurance Plan of NY (HIP)
  • Health Plus - Amerigroup [CHP]
  • Health Plus - Amerigroup
  • Health Republic
  • Medicaid
  • Medicare
  • Oscar
  • Oxford Health Plans [Liberty]
  • Oxford Health Plans [Medicare Advantage]
  • Oxford Health Plans [Freedom]
  • Rockefeller University - CoreSource
  • UHC Compass
  • United Empire
  • United Health Care
  • United Health Care [Medicare]
  • United Health Care [Community Plan]
  • VNSNY CHOICE Medicare [Medicare]
  • VNSNY CHOICE Medicare [HMO]


Markowitz SM, Stein KM, Lerman BB. Mechanism of ventricular rate control after radiofrequency modification of atrioventricular conduction in patients with atrial fibrillation. Circulation, 1996;94:2856-2864.

Markowitz SM, Litvak BL, Ramirez de Arellano EA, Markisz JA, Stein KM, Lerman BB. Adenosine-sensitive ventricular tachycardia: Right ventricular abnormalities delineated by magnetic resonance imaging. Circulation, 1997;96:1192-1200.

Markowitz SM, Stein KM, Mittal S, Slotwiner DJ, Lerman BB. Differential effects of adenosine on focal and macroreentrant atrial tachycardia. J Cardiovasc Electrophysiol, 1999;10:489-502.

Markowitz SM, Brodman RF, Stein KM, Mittal S, Slotwiner DJ, Iwai S, Das MK, Lerman BB. Lesional tachycardias related to mitral valve surgery. J Am Coll Cardiol, 2002;39:1973-1983.

Markowitz SM, Nemirovsky D, Stein KM, Mittal S, Iwai S, Shah BK, Dobesh DP, Lerman BB. Adenosine-insensitive focal Atrial tachycardia: Evidence for de novo microreentry in the human atrium. J Am Coll Cardiol, 2007;49:1324-33.

Patel A and Markowitz SM. Atrial Tachyardia: Mechanisms and Management. Expert Review of Cardiovascular Therapy 2008;6:811-822.

Markowitz SM, Lewen JM, Wiggenhorn CJ, Abraham WT, Stein KM, Iwai S, Lerman BB. Relationship of reverse anatomical remodeling and ventricular arrhythmias after cardiac resynchronization. J Cardiovasc Electrophysiol. 2009;20:293-298.

Lin A, Markowitz SM. Catheter ablation of atrial fibrillation. In: Topics in Arrhythmias and Ischemic Heart Disease. (Lerman BB, Basson CT, Eds.), Demos Medical, New York, 2010.

Markowitz SM, Lerman BB. Ablation of Atypical Flutter and Atrial Macroreentry. In: Catheter Ablation of Cardiac Arrhythmias: Principles and Practical Approach. 2nd Ed. (Huang SKS, Wood MA, Eds.), Saunders, 2010.

Ip JE, Cheung JW, Park D, Hellawell JL, Stein KM, Iwai S, Christopher CF, Lerman BB, Markowitz SM. Temporal associations between thoracic volume overload and malignant ventricular arrhythmias: A study of intrathoracic impedance. J Cardiovasc Electrophysiol 2011;22:290-298.

Honors and Awards

John Harvard Scholarship, Harvard College

Detur Prize, Harvard College

Phi Beta Kappa

Voted one of New York's Best Doctors by Castle Connolly, 2009-2012

US News & World Reports, Best Doctors, 2011

Research Grants:

John Sable Memorial Heart Fund, Independent Order of Oddfellows, Cardiology Fellowship

Medtronic, Inc. Research Grant: Magnetic Resonance Imaging in Patients with Idiopathic Ventricular Tachycardia