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.

Symptoms

Fatigue

Fatigue can signal many things. Here are some tips to help you decipher why you're wiped out and to regain your energy.

Headache

Most headaches aren't caused by a serious illness, but some could be a sign of a life-threatening condition.

Shortness of breath

Shortness of breath can be frightening. Most of the time, a heart or lung condition is the cause.

Tests and diagnosis

Bone marrow biopsy

Aspiration and biopsy are procedures to collect and examine bone marrow. These tests can help diagnose some cancers and other conditions.

Treatments and drugs

Blood transfusion

Blood transfusions boost blood levels that are low due to surgery, injury or disease. Learn about the benefits, risks and what to expect.

Mar. 18, 2014

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