Dr. John S Tsakonas is a Cardiologist and Internal Medicine in Northridge, Los Angeles and has an experience of 44 years in these fields. Dr. John S Tsakonas practices at Dignity Health - Northridge Hospital Medical Center in Northridge, Los Angeles,Providence Cedars-Sinai Tarzana Medical Center in Tarzana, Los Angeles and Encino Hospital Medical Center in Encino, Los Angeles. He completed Residency in Internal Medicine from The George Washington University in 1985,Fellowship in Cardiovascular Diseases from The George Washington University in 1987 and Medical Education from State University Of New York Upstate Medical University in 1982. He is a member of American College of Cardiology and Society of Cardiac CT. Some of the services provided by the doctor are: Hypertrophic Cardiomyopathy,Family History of Sudden Cardiac Death,Transesophageal Echocardiography,Rheumatic Diseases of Pulmonary Valve and Abnormal Coronary Angiography etc.