John Sirak
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John Sirak, MD, is a cardiothoracic surgeon at The Ohio State University Wexner Medical Center, specializing in cardiac surgery such as minimally invasive valve surgery and arrhythmia surgery.

An assistant professor of clinical surgery at Ohio State, Dr. Sirak earned his medical degree from Case Western Reserve University in Cleveland, Ohio. He completed his residency in cardiothoracic surgery and a fellowship in minimally invasive cardiac surgery at The Ohio State University Wexner Medical Center.

Dr. Sirak’s research focuses on finding minimally invasive surgical techniques to improve heart surgery outcomes, especially in the area of atrial fibrillation treatment.

Medical Degree

  • M.D.
    Case Western Reserve University School of Medicine


  • Cardiac Surgery
    Ohio State University Wexner Medical Center
    7/1/2000 - 6/30/2003
  • Surgery
    University of California- Davis
    7/1/1991 - 6/30/1995

Additional languages I speak

  • Mandarin Chinese

Specialities and conditions I treat

  • Cardiac Surgery
  • Cardiovascular Diseases
  • Heart Failure
  • Device Removal
  • Heart Valve Diseases
  • Mitral Valve Prolapse
  • Heart Diseases
  • Arrhythmias, Cardiac
  • Coronary Artery Bypass
  • Cardiac Surgical Procedures
  • Heart Failure, Diastolic
  • Heart Failure, Systolic
  • Transplantation Immunology
  • Aortic Valve Insufficiency
  • Heart Valve Prolapse
  • Heart Valve Prosthesis Implantation
  • Heart Bypass, Right
  • Aortic Valve Prolapse
  • Atrial Fibrillation
  • Thoracoscopy
  • Minimally Invasive Surgical Procedures
  • Coronary Artery Bypass, Off-Pump
  • Aortic Valve
  • Mitral Valve
  • Heart Valves
  • Mitral Valve Annuloplasty
  • Aortic Valve Stenosis
  • Mitral Valve Stenosis
  • Coronary Artery Disease
  • Mitral Valve Insufficiency

More about my work

My background

Board Certifications

American Board of Surgery

American Board of Thoracic Surgery

My Department



Cardiac Surgery