Cardiology & Cardiovascular Services at St. Joseph Health Medical Group

Whatever level of care is needed — education, prevention, diagnosis or cutting-edge treatment and rehabilitation — we’re experts in your heart’s good health. We use today’s state-of-the-art testing methods to identify heart conditions and are committed to offering exceptional evidence-based medicine by bringing the newest research to our patients. Our partnerships with Santa Rosa Memorial Hospital, Queen of the Valley Medical Center in Napa and St. Joseph Hospital, Eureka ensure we offer the entire spectrum of services across the region -- from wellness programs to interventional cardiology that allow the newest, lifesaving procedures.

Procedures Performed

Pacemaker Checks


Treadmill Stress Tests

Nuclear Cardiology



Ultrasound identifies problems of the heart valves and muscle function. Our digital system at St. Joseph Hospital provides higher-resolution images and faster diagnosis.

Stress testing, including nuclear

A noninvasive way to look for blocked arteries by stressing your heart with exercise or medications. Nuclear testing produces images of the heart’s structure and blood flow under stress.

Noninvasive vascular testing

We use ultrasound to check for blocked arteries in other parts of the body. Heart monitoring - Portable monitoring to look for signs of irregular heart rhythms.

Catheterization & angiography

The “gold standard” in evaluating for blocked arteries. A small,flexible tube helps X-rays to “look for” blocked arteries and can help measure pressures in the heart and blood vessels.


CT angiography

Coronary angiogram

Coronary stenting

Internal cardiac defibrillators

Intravascualr ultrasound

Permanent pacemaker implantation

Critical care

Heart attack & heart disease prevention

Proactive care for obesity, high cholesterol & hypertension

Advanced heart failure & arrhythmia management

Lifestyle, nutrition & exercise counseling

Conditions Treated

Aortic Aneurysm

Arteriosclerosis Obliterans

Carotid Artery Disease

Chronic Venous Insufficiency

Deep Venous Thrombosis

Peripheral Arterial Disease (PAD)

Superficial Thrombophlebitis

Vasospastic Diseases



Diabetic Foot

Thromboangiitis Obliterans





Varicose Veins

Spider Veins

Venous Insufficiency

Deep Vein Thrombosis (DVT)

Peripheral arterial disease (PAD)

Our Providers

Our Provider

Sergio M. Manubens, MD
Sergio M. Manubens, MD
Cardiology, Cardiovascular Disease, Interventional Cardiology
City:  Napa
4.9 out of 5

Meet Our Program Director

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Our Locations

Eureka -  Cardiology

Eureka - Cardiology

2773 Harris St., Suite A
Eureka, CA 95503
Eureka - Cardiology Diagnostic Center

Eureka - Cardiology Diagnostic Center

2332 23rd St.,
Eureka, CA 95501
Lakeport - Medical Oncology

Lakeport - Medical Oncology

5150 Hill Rd. E., Suite F
Lakeport, CA 95453

Mon - Fri: 8:30 a.m. - 5 p.m.

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Napa - Cardiology

Napa - Cardiology

3443 Villa Lane, Suite 2
Napa, CA 94558
Petaluma - Cardiology

Petaluma - Cardiology

108 Lynch Creek Way, Suite 2
Petaluma, CA 94954
Ukiah - Cardiology

Ukiah - Cardiology

240 Hospital Dr., Suite B
Ukiah, CA 95482