Department of Cardiology

You can now find the expert care of St. Joseph Hospital Cardiologists at St. Joseph Heritage Medical Group (SJHMG). With a breadth of experience spanning the areas of cardiovascular disease, women's heart disease and coronary heart disease, the Cardiology Department of SJHMG provides the expertise to treat the most severe conditions as well as provide ongoing preventive care.

Meet our cardiology experts (l to r): Brian Kim, MD; Donald Mahon, MD; Warren Johnston, MD; Thomas C. Kim, MD; and Michael Chan, MD.

Affiliated with St. Joseph Hospital, the physicians of the Department of Cardiology at SJHMG are at the top of their field. Warren Johnston, MD, serves as co-director of the Women's Heart Center and Dr. Thomas Kim is the medical director of non-invasive cardiology at St. Joseph Hospital.
Click here to meet our team of cardiology experts.

We specialize in the prevention and treatment of a broad spectrum of heart diseases, ranging from artery blockage disease to heart failure to heart rhythm abnormalities. Our board certified cardiologists include imaging specialists, an electrophysiologist, and interventional cardiologists who offer today's most comprehensive, cutting edge approaches to the diagnosis and treatments of heart disease that is tailored to each patient's specific needs.

Whatever level of care is needed—education, prevention, diagnosis, treatment or rehabilitation—we're experts in your heart's good health. Our partnership with St. Joseph Hospital ensures we offer the entire spectrum of services, from highly effective cardiac wellness programs to state-of-the-art cardiac catheterization labs and hybrid operating room that allow the newest, lifesaving procedures.

With an emphasis on early detection, we use the most advanced diagnostic technologies available, including:

• Electrocardiograms (EKGs)
• Rhythm monitoring including Ziopatch, Holter, and event monitoring
• Echocardiograms
• Stress testing including stress echocardiography and nuclear stress testing
• Computed tomography (CT) including CT coronary angiography
• Cardiac MRI
• Transesophageal echocardiography including 3D imaging

And if a problem is identified, we are committed to offering the best possible care to our patients by using the latest research and evidence-based treatments.

Conditions & Treatments

Our cardiologists successfully diagnose and treat a wide range of symptoms and conditions, including:

• High blood pressure (hypertension)
• High cholesterol
• Angina/Chest pain
• Heart murmur/Heart valve abnormalities
• Cardiomyopathy/Enlarged heart
• Endocarditis/Heart valve infection
• Coronary artery disease
• Congestive heart failure
• Peripheral vascular disease
• Arrhythmias (irregular heartbeat), including atrial fibrilation

Our cardiologists are committed to offering the newest and most effective treatment options, from innovative medical intervention to cardiac catheterization. St. Joseph Hospital's state-of-the-art cardiac catheterization labs and hybrid operating room allow us to perform today's most advanced procedures including:

• Coronary angiography
• Coronary angioplasty and stenting
• Intravascular ultrasound
• Coronary flow reserve assessments
• Internal cardioverter defibrillators (ICDs)
• Biventricular pacemakers and ICDs
• Permanent pacemakers

Meet Our Physicians

Michael Chan, MD
Warren Johnston, MD
Brian Kim, MD
Thomas C. Kim, MD
Donald Mahon, MD

Our physicians are currently accepting new patients. To make an appointment or for more information, call (714) 543-5555.