Gregory M. Marcus

MD

Cardiologist and electrophysiologist

Dr. Gregory Marcus is a cardiologist and electrophysiologist who specializes in the diagnosis and treatment of arrhythmias, including cardiac mapping and catheter ablation for atrial fibrillation, supraventricular tachycardias and ventricular arrhythmias. He is also an expert in implanting pacemakers, biventricular devices and defibrillators.

In his research, Marcus studies heart rhythm disturbances, and the health effects of common lifestyle factors such as alcohol, caffeine, smoking and other substances, and leads several large projects to use sensors, smart phones and other technologies to conduct clinical research.

Marcus earned his medical degree from George Washington University School of Medicine & Health Sciences. He completed his residency at Stanford Medicine. He then completed his training in cardiovascular medicine and cardiovascular electrophysiology at UCSF.

  • Education

    George Washington University School of Medicine, 1998

  • Residencies

    Stanford Hospital and Clinics, Internal Medicine, 2002

    UCSF Medical Center, Cardiology, 2004

  • Fellowships

    UCSF Medical Center, Cardiac Electrophysiology, 2006

  • Board Certifications

    Clinical Cardiac Electrophysiology, American Board of Internal Medicine

  • Academic Title

    Professor

Conditions I specialize in

Treatments I provide

Where I see patients (2)

    My reviews

    4.9

    Overall Experience
    108 Ratings
    About our process
    Feb 12, 2023
    Dr. Marcus has been excellent throughout this journey. I am very grateful.
    Dec 05, 2022
    Dr Marcus is an excellent caring provider. He listens carefully to my questions and encourages me to ask about any concerns. He shares the appropriate information to address my questions and concerns. He is extremely knowledgeable and very down to earth.
    Nov 19, 2022
    Good
    Oct 22, 2022
    I could not be more satisfied with the care I have been receiving from Dr. Marcus
    Oct 01, 2022
    It was a good appointment.
    Sep 11, 2022
    I had a fairly brief consultation with Dr Marcus which he had scheduled at my request. It did allow sufficient time to address my main questions. I will be able to use the upcoming Care Team call to address my remaining questions.
    Sep 10, 2022
    Dr Marcus and his team member Ruth provided excellent and compassionate care very pleased
    Sep 08, 2022
    Overall it was a great experience. Great job.
    Jul 25, 2022
    Dr Marcus is great and always has been
    Jul 06, 2022
    Dr Marcus was very thorough in his questions about my case and he listened carefully and asked appropriate follow up questions. His manner put me at ease. He involved me in decisions about further evaluations and tests. He seemed genuinely interested and sympathetic to my concerns.
    May 18, 2022
    Dr Marcus truly seems to understand my lifestyle and cares that I get the help I need in order to live like I had been before my heart issues.
    Feb 19, 2022
    Very satisfied with my provider
    Dec 11, 2021
    Dr Marcus and assistant Ruth provided outstanding service.
    Oct 23, 2021
    In previous appointments I was given a choice of treatments. I picked a treatment. At this appointment doctor said it was no longer a treatment option. It was very disappointing that I was given information that I stressed over for eight months and then told that I had to start over again from square one. I don't believe this doctor follows my history or even what he said to me at previous appointments. I think he just wings it at appointment time.
    Sep 21, 2021
    I had a perfect visit!
    Jul 08, 2021
    Dr. Marcus was thorough and thoughtful. He knows what he is talking about and he's a good listener too.
    May 18, 2021
    Dr. Marcus provided fantastic service as always a d was extremely well supported by Ruth.

    Selected research

    Decorative Caduceus

    Volunteers to Investigate Best Results for Ablation and Novel Therapies for Atrial Fibrillation

    Time to atrial fibrillation, after employing a 3-month blanking period. Atrial Fibrillation Recurrence includes patient-reported symptoms of AF or Kardia-based ECG evidence of AF.

    Recruiting

    Decorative Caduceus

    The Heart Rhythm Twins Study

    This will be measured using a wearable EKG monitor.

    Recruiting

    Decorative Caduceus

    Does Eliminating Coffee Avoid Fibrillation?

    The number of patient's with AF and/or AFlutter recurrence following direct current electrical cardioversion will be compared

    Recruiting

    Decorative Caduceus

    Transseptal vs Retrograde Aortic Ventricular Entry to Reduce Systemic Emboli

    incidence of new cerebral embolic lesions measured by magnetic resonance imaging (MRI) post-ablation as compared to pre-ablation imaging studies

    Recruiting

    My work

    UCSF study on marijuana legalization finds uptick in drug abuse, decrease in chronic pain reports

    Contact me

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