Heart Health Medical Reference

Find out what you need to know about your aortic valve — where it's located, what it does, and how it works. Learn about the symptoms, causes, and treatments for aortic valve conditions.

Find out what you need to know about the vena cava. Learn about these important blood vessels' location, functions, and disorders.

Find out what you need to know about the femoral artery, including associated conditions, its function, and how it may affect your health.

Find out what you need to know about the brachial artery, as well as blood supply to the arm, forearm, and hand. Learn about the location of this artery and how to keep it safe.

Find out the differences between arteries, veins, and capillaries and the role they play in your body.

Pneumopericardium is when you have gas or air in the sac around your heart. Learn about the causes, symptoms, and treatment options for this condition today.

Find out the differences between arteries and veins and discover the roles of each.

Heart rate variability is the time between each heartbeat. Find out what affects your HRV, and the importance of tracking your HRV.

Cardiac output is defined as the amount of blood your heart pumps. Learn about the normal output rate, how it's measured, and causes of low cardiac output.

Ejection fraction (EF) refers to the percentage of blood being pumped out of your heart’s lower chambers. If your EF is low, you could have heart failure. Here’s what you can do.

Myocardial contusion is a bruise to the heart muscle. Learn about the causes, symptoms, and treatment options for this condition today.

Do you sometimes get dizzy when you stand up? That could be orthostatic hypotension.

If you have a leaky heart valve, you may have surgery to repair or replace it. Find out what to expect.

Learn about two devices -- an ICD and pacemaker -- that can help you keep your heart beating correctly.

Learn more about dextrocardia and its different types, symptoms, and effects on health.

Learn about the conditions that affect your heart and the habits that can help prevent or manage them.

The location of the popliteal pulse is behind your knee. Learn more about what causes it, what to expect, and more.

Find out how to keep your numbers in check

WebMD explains the causes, symptoms, and treatments for mitral valve prolapse.

WebMD looks at the herb astragalus root and whether or not it offers any specific heart benefits.

WebMD examines the use of arginine (L-arginine) to improve heart health. Find out where it comes from, if supplementation works, and its possible side effects.

They call HDL cholesterol your "good" cholesterol for a reason. Gather some tips for increasing your level of HDL cholesterol and boosting heart health.

Learn more about the types and causes of low blood pressure, or hypotension, from the experts at WebMD.