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Zian H. Tseng


Cardiologist and electrophysiologist

Dr. Zian H. Tseng is a cardiologist and electrophysiologist (a specialist in heart rhythm disorders). He is an expert in determining the risk of patients prone to sudden cardiac death (SCD) and ventricular arrhythmias, which can cause SCD. He also specializes in catheter ablation of complex arrhythmias (a procedure to destroy heart tissue causing abnormal rhythms), implanting defibrillators and resynchronizing heart devices. He has special expertise in performing these procedures for patients with congenital heart disease. He also helps develop new devices to treat heart rhythm disorders.

Tseng is the principal investigator for the POstmortem Systematic InvesTigation of Sudden Cardiac Death (POST SCD) study, a collaboration with the San Francisco Office of the Chief Medical Examiner that has been funded by the National Institutes of Health since 2010. The study's goal is to more accurately define SCD and determine its underlying causes, risk factors and genetics. He is also the principal investigator for the San Francisco POstmortem Systematic InvesTigation of Sudden Death in the Young (POST SDY) registry, which is funded by the Centers for Disease Control and Prevention, and works to more accurately define sudden death in pediatric populations. In addition, he is studying the risk of sudden death with the use of Tasers by law enforcement agencies.

A Bay Area native, Tseng completed undergraduate studies in molecular biology and biochemistry at the University of California, Berkeley and earned his medical degree at UCSF, where he also completed a year of graduate studies in biomedical sciences. He completed subspecialty training in internal medicine, cardiology and cardiac electrophysiology at UCSF.

  • Education

    UCSF School of Medicine, 1998

  • Residencies

    UCSF Medical Center, 2000

  • Fellowships

    UCSF Medical Center, Cardiology, 2002

    UCSF Medical Center, Cardiac Electrophysiology, 2004

  • Academic Title


  • Languages


Where I see patients (4)

    My reviews


    Overall Experience
    66 Ratings
    About our process
    Sep 04, 2023
    I thought he was great.
    Aug 28, 2023
    Everyone involved were concise professional interested and knowledgeable
    Jul 05, 2023
    Again the doctor is excellent. His NP isn't. When I first described my symptom of falling because I lost consciousness she thought that a simple solution was to ask my PNP for reference to a physical therapist. I asked her how on God'sgreenearth could a physical therapist treat unconsciousness? She said well you said you didn't exercise. Yes exactly because I pass out. Then she said she would ask the doctor about this symptom. Really hire me and I can give even better advice.
    May 03, 2023
    Dr. Tseng was EXCELLENT
    Apr 09, 2023
    was Excellent
    Mar 06, 2023
    Clarified misconceptions I had about my condition.
    Feb 08, 2023
    Received new information of what I should not do regarding physical exercise which will be helpful for future exercises.
    Feb 05, 2023
    Dr Tseng is the best cardiologist I have seen. He is clear concise and does his homework. Highly recommended
    Jul 12, 2022
    The guy is just great!!!!
    Jul 11, 2022
    Dr Tseng was very informative and very clear on my medical condition and treatment options.
    Apr 29, 2022
    I never spoke with the doctor and I need to wait six months now to speak to him
    Apr 28, 2022
    Dr. Tseng was ill so appointment was with his assistant.
    Mar 07, 2022
    I feel fortunate that he is my provider!!!
    Feb 03, 2022
    This was a responsive outstanding and informative consultation. A rare gift.

    My work

    Sudden Cardiac Death More Likely to Fell Persons with HIV Infection

    Please check with your health insurance plan regarding coverage for this type of care. Not all providers at UCSF are covered by every insurance plan.
    This provider is employed by a medical group affiliated with UCSF.