
Overview
Dr. Connor O'Brien is a cardiologist with expertise in echocardiography (ultrasound of the heart) and critical care medicine. He focuses on care for adults with severe cardiac dysfunction or systemic shock who need prompt treatment in intensive care. He also cares for patients during the transition from intensive care to outpatient cardiac care. O’Brien's research generally revolves around the identification and treatment of severe cardiovascular dysfunction. He is particularly interested in studying molecular cargo produced by the human body, which can be repurposed as regenerative medicine therapeutics as well as serve as markers of disease severity in systemic shock. His research focuses on translating basic science discoveries to clinical applications that improve understanding of underlying disease processes and effective treatments. O'Brien earned his medical degree at Columbia University Vagelos College of Physicians and Surgeons. He completed a residency in internal medicine and fellowships in cardiovascular medicine and critical care medicine at Stanford Medicine. O'Brien has participated in several global health initiatives. He provided primary care in Guatemala to communities with limited access to medical care. He studied infectious disease in Amazonas, Brazil, with support from the American Society of Tropical Medicine and Hygiene. He also worked in Harare, Zimbabwe, providing patient care and supporting educational efforts in Parirenyatwa Hospital, as part of the Johnson & Johnson global health fellowship program. O'Brien is a former rugby player and avid fan. He won a national championship in 2006 while playing with the Mission Rugby Football Club (RFC) and later joined the Super League with Old Blue RFC.
Dr. O'brien is highly rated in 6 conditions, according to our data. His clinical expertise encompasses Cardiogenic Shock, Doxorubicin-Induced Cardiomyopathy, Cardiomyopathy Due to Anthracyclines, and Heart Attack.
Dr. O'brien is board certified in American Board Of Internal Med/Cardiovascular Dis, Cardiovascular Disease, American Board Of Internal Med/Critical Care Med, Critical Care Medicine, and American Board Of Internal Medicine, Internal Medicine. He is actively involved in clinical research, co-authoring 71 peer reviewed articles. Dr. O'brien is currently accepting new patients.
Specialties
Licenses
Board Certifications
Fellowships
Hospital Affiliations
Languages Spoken
Gender
Insurance
Accepted insurance can change. Please verify directly with the provider.
Accepted insurance plans:
- EPO
- HMO
- POS
- PPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE-MEDICAID PLAN
- OTHER COMMERCIAL
- OTHER MEDICARE
- OTHER MEDICARE PART D
- PPO
- EPO
- HMO
- PPO
Accepted plan types not found. Please verify directly with the provider.
- HMO
- INDEMNITY
- POS
- PPO
- OTHER MEDICAID
- STATE MEDICAID
- EPO
- HMO
- POS
- PPO
- EPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER MEDICARE
- OTHER MEDICARE PART D
Locations
505 Parnassus Ave., 10th Floor, San Francisco, CA 94143
Clinical Research
Clinical research consists of overseeing clinical studies of patients undergoing new treatments and therapies, and publishing articles in peer reviewed medical journals. Providers who actively participate in clinical research are generally at the forefront of the fields and aware of the most up-to-date advances in treatments for their patients.
Interventional Cardiology Program
Dr. Sammy Elmariah is an interventional cardiologist who cares for adults with heart valve disease, coronary artery disease and congenital heart disease. He is an expert in transcatheter (minimally invasive) heart valve procedures, including transcatheter aortic valve replacement (TAVR), transcatheter edge-to-edge mitral valve repair (TEER or MitraClip) and transcatheter mitral valve replacement (TMVR). He also specializes in assessing new medical devices for repairing or replacing the heart's tricuspid valve. The overall goal of Elmariah's research is to advance transcatheter and other surgical procedures for heart valve disease in order to maximize patient health and outcomes. He leads several clinical trials (studies with human volunteers) focused on valvular heart disease. These include landmark studies testing new transcatheter devices that treat heart valve disease without the need for open heart surgery. He and his research team are also investigating how to increase access to heart valve disease treatments and improve patient involvement in the management of their own care. And they are studying biomarkers (distinctive, measurable substances) in the blood that may help doctors determine the optimal time for individual patients to undergo heart valve procedures. His research team is funded by the National Institutes of Health, American Heart Association, U.S. Department of Defense and several industry partners. Elmariah earned his medical degree from the Perelman School of Medicine at the University of Pennsylvania. He completed a residency in internal medicine at the Hospital of the University of Pennsylvania. He completed fellowships in interventional cardiology and structural heart disease at Massachusetts General Hospital, an affiliate of Harvard Medical School. He also has a master of public health degree from the Harvard T.H. Chan School of Public Health. Dr. Sammy Elmariah is married to Dr. Sarina Elmariah, a dermatologist at UCSF, and they are the proud parents of two wonderful boys. Dr. Elmariah is highly rated in 12 conditions, according to our data. His clinical expertise encompasses Aortic Valve Stenosis, Mitral Stenosis, Patent Foramen Ovale, Aortic Valve Replacement, and Transcatheter Aortic Valve Replacement (TAVR). Dr. Elmariah is board certified in American Board Of IM/Interventional Cardiology, Interventional Cardiology. Dr. Elmariah is currently accepting new patients.
Echocardiography Lab At Parnassus
Dr. Theodore Abraham is a cardiologist who cares for adults with hypertrophic cardiomyopathy, or HCM (heart muscle thickening that forces the heart to work harder than it should). He co-directs the Hypertrophic Cardiomyopathy Clinic, a designated center of excellence for HCM care. HCM is the most common cause of sudden death in athletes, especially young athletes. Because the condition is usually inherited and often goes undiagnosed, he has a particular interest in evaluating patients with suspected HCM as well as family members of patients with the condition. Abraham's research focuses on risk prediction and early diagnosis of HCM. He uses advanced imaging and computational techniques to better assess heart health in athletes. He was on the editorial board of the Journal of the American Society of Echocardiography, Journal of the American College of Cardiology: Cardiovascular Imaging, and Circulation: Cardiovascular Imaging (a journal of the American Heart Association). He also serves as an expert on HCM for the British Medical Journal. Abraham earned his medical degree from the University of Mumbai in India. He completed a residency in internal medicine at Wake Forest University School of Medicine, where he also completed a research fellowship in echocardiography. He completed a fellowship in clinical cardiology at the University of Texas Southwestern Medical Center and a fellowship in advanced echocardiography at the Mayo Clinic in Rochester, Minnesota, where he stayed on as a consultant cardiologist. Before joining UCSF, he was a professor of medicine, radiology and radiological science at Johns Hopkins Medicine, where he also served as associate dean for research. There, he founded the Hopkins Heart Hype Program, a community outreach program screening high school and college athletes for heart disease and educating them about heart health and CPR. Abraham has received numerous research grants and awards for his work. He is president of the American Society of Echocardiography and was the founder-president of the Hypertrophic Cardiomyopathy Medical Society. Abraham is part of the San Francisco Giants and UCSF Health's partnership to provide players and staff with top-tier medical care and promote community well-being. Dr. Abraham is highly rated in 16 conditions, according to our data. His clinical expertise encompasses Hypertrophic Cardiomyopathy (HCM), Cardiomyopathy, Subvalvular Aortic Stenosis, and Familial Hypertrophic Cardiomyopathy. Dr. Abraham is board certified in American Board Of Internal Med/Cardiovascular Dis, Cardiovascular Disease. Dr. Abraham is currently accepting new patients.
Stanford Health Care
Ingela Schnittger is a Cardiologist practicing medicine in Emeryville, California. Dr. Schnittger is highly rated in 54 conditions, according to our data. Her clinical expertise encompasses Congenital Coronary Artery Malformation, Pulmonary Hypertension, Cardiomyopathy, Heart Transplant, and Aortic Valve Replacement. Dr. Schnittger is currently accepting new patients.
Frequently Asked Questions about Dr. Connor G. O'brien
How do I make an appointment with Dr. Connor G. O'brien?
You can book an appointment with Dr. Connor G. O'brien by calling their office at 415-353-1007. MediFind provides direct contact information so you can schedule visits, second opinions, or consultations without navigating third-party calendars.
Is Dr. Connor G. O'brien a top-rated expert for Cardiogenic Shock?
MediFind is an objective health platform that identifies experts based on real-world data. Dr. Connor G. O'brien is classified as an Distinguished expert for Cardiogenic Shock, meaning they are among the top experts in the country for this condition. This ranking is based on their volume of patients, published research, and peer connections.
What conditions does Dr. Connor G. O'brien specialize in?
While Dr. Connor G. O'brien is a Cardiology, they have specific expertise in Cardiogenic Shock, Doxorubicin-Induced Cardiomyopathy, and Cardiomyopathy Due to Anthracyclines. MediFind analyzes a doctor's articles and referral patterns to identify their specific areas of focus within Cardiology.
Does Dr. Connor G. O'brien participate in research or clinical trials?
Yes. Dr. Connor G. O'brien has published 71 articles and abstracts on conditions like Cardiogenic Shock. You can view a list of Dr. Connor G. O'brien's latest peer-reviewed publications and clinical trial participation on their profile to see if they are active in new treatments.
Does Dr. Connor G. O'brien accept my insurance?
Dr. Connor G. O'brien accepts most major insurance plans, including Anthem BCBS and Blue Shield of California. We recommend calling the office directly at 415-353-1007 to verify that your specific plan is currently accepted before your visit.
Areas of Expertise
MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.
Learn more about MediFind’s expert tiers
- Distinguished
- Cardiogenic ShockDr. O'brien isDistinguished. Learn about Cardiogenic Shock.
- Cardiomyopathy Due to AnthracyclinesDr. O'brien isDistinguished. Learn about Cardiomyopathy Due to Anthracyclines.
- Doxorubicin-Induced CardiomyopathyDr. O'brien isDistinguished. Learn about Doxorubicin-Induced Cardiomyopathy.
- Advanced
- CardiomyopathyDr. O'brien isAdvanced. Learn about Cardiomyopathy.
- Heart AttackDr. O'brien isAdvanced. Learn about Heart Attack.
- Heart FailureDr. O'brien isAdvanced. Learn about Heart Failure.
- Experienced
- Aortic Valve StenosisDr. O'brien isExperienced. Learn about Aortic Valve Stenosis.
- ApoplexyDr. O'brien isExperienced. Learn about Apoplexy.
- ArrhythmiasDr. O'brien isExperienced. Learn about Arrhythmias.
- Arrhythmogenic Right Ventricular Cardiomyopathy
- Arterial EmbolismDr. O'brien isExperienced. Learn about Arterial Embolism.
- Cardiac ArrestDr. O'brien isExperienced. Learn about Cardiac Arrest.
- Cardiac TamponadeDr. O'brien isExperienced. Learn about Cardiac Tamponade.
- COVID-19Dr. O'brien isExperienced. Learn about COVID-19.
- Low Blood PressureDr. O'brien isExperienced. Learn about Low Blood Pressure.
- MyocarditisDr. O'brien isExperienced. Learn about Myocarditis.
- NecrosisDr. O'brien isExperienced. Learn about Necrosis.
- Paroxysmal Ventricular FibrillationDr. O'brien isExperienced. Learn about Paroxysmal Ventricular Fibrillation.
- Pediatric MyocarditisDr. O'brien isExperienced. Learn about Pediatric Myocarditis.
- Pulmonary EdemaDr. O'brien isExperienced. Learn about Pulmonary Edema.
- Pulmonary HypertensionDr. O'brien isExperienced. Learn about Pulmonary Hypertension.
- Pulmonary Veno-Occlusive DiseaseDr. O'brien isExperienced. Learn about Pulmonary Veno-Occlusive Disease.
- Spinal ShockDr. O'brien isExperienced. Learn about Spinal Shock.
- ThrombophlebitisDr. O'brien isExperienced. Learn about Thrombophlebitis.
- Ventricular FibrillationDr. O'brien isExperienced. Learn about Ventricular Fibrillation.
- Ventricular TachycardiaDr. O'brien isExperienced. Learn about Ventricular Tachycardia.

