In-depth

Risk factors

Stress symptoms

Aches and pains, irritability, and crying spells may have an unexpected source — stress. Recognize these and other signs and symptoms so that you can take action.

Symptoms

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.

Nov. 15, 2011