In-depth

Causes

Heart arrhythmias

A heart arrhythmia is an abnormal heart rhythm. Arrhythmias can be a byproduct of damage to the heart from disease or age.

Complications

Low blood pressure (hypotension)

Low blood pressure (hypotension) can be a sign of good health or of a life-threatening condition. Find out more about hypotension's causes and treatment options.

Pulmonary hypertension

High blood pressure affecting only the arteries in your lungs is known as pulmonary hypertension. Discover the symptoms, risk factors and treatment for this condition.

Ventricular fibrillation

Ventricular fibrillation is a life-threatening heart rhythm disturbance that requires immediate treatment. Find out more.

Risk factors

High blood pressure (hypertension)

Uncontrolled high blood pressure can lead to various life-threatening conditions. But it's easily detected — and you can work with your doctor to control it.

Symptoms

Heart palpitations

Heart palpitations are skipped, fluttering or racing heartbeats that aren't usually a symptom of a serious heart problem. Discover the causes and symptoms of this condition.

Tachycardia

Tachycardia, a rapid heart rate, is caused by an abnormality in your heart's electrical impulses. Tachycardia can cause serious complications, including sudden cardiac arrest.

Tests and diagnosis

Eye exam

Eye exam — Overview covers definition, what to expect and results of vision testing.

MRI

MRI uses a magnetic field and radio waves to create detailed images of the organs and tissues within your body.

Treatments and drugs

Canalith repositioning procedure

The canalith repositioning procedure can help relieve dizzy spells caused by benign paroxysmal positional vertigo (BPPV). Here's how the procedure is done.

Psychotherapy

Psychotherapy is one way to treat many mental illnesses. See how therapy is used and which type may be best for you.

Sep. 06, 2012

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