In-depth

Causes

Allergies

Cold urticaria

Drug addiction

Drug allergy

Heart disease

Heart disease, usually thought of as blockages in the arteries that can cause a heart attack, can describe any medical condition affecting your heart.

Hyperthyroidism

Hypothermia

Iron deficiency anemia

Iron deficiency anemia may leave you feeling sapped of energy. This condition is especially common in women. Iron supplements usually help.

Complications

Amniotic fluid embolism

Dehydration

You normally lose about 10 cups (2.4 liters) of water every day — much more during exercise or illness. Learn how to stay hydrated.

Generalized anxiety disorder

Guillain-Barre syndrome

Heart failure

Pectus excavatum

Pericardial effusion

Pericardial effusion, the accumulation of excess fluid in the sac-like structure around the heart, can decrease heart function and can be life-threatening.

Spontaneous coronary artery dissection (SCAD)

Find out about this rare cause of heart attack in young, healthy people.

Ventricular fibrillation

Prevention

Alcohol use

Drinking alcohol might offer some health benefits. But that's only if you drink responsibly and in moderation.

Caffeine: How much is too much?

Fitting in fitness

Finding time for fitness can be tough. Start by making it convenient.

How to say no

Ingredient substitutions

Healthier recipes may be as close as your own pantry. See which ingredient substitutions you can make to improve your diet.

Risk factors

Panic attacks and panic disorder

Symptoms

Dizziness

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.

Shortness of breath

Tests and diagnosis

Electrocardiogram

Holter monitor

Tilt table test

Treatments and drugs

Cardiac ablation

Cardioversion

Implantable cardioverter-defibrillator

May 06, 2014