Acute coronary syndrome

Acute coronary syndrome occurs when there isn't enough blood flowing through your heart. It can be felt as chest pain (angina) or a heart attack.

Adult Still's disease

Daily fevers, achy joints and an intermittent, salmon-pink rash may be an indication that you have a rare inflammatory disorder called adult Still's disease.


Aortic aneurysm

Aortic valve regurgitation

Aortic valve stenosis


Atrial fibrillation

Atrial flutter

Atrial septal defect

Atrioventricular canal defect

Broken heart syndrome

Broken heart syndrome, also called stress cardiomyopathy, mimics a heart attack. Discover how stress could trigger this puzzling condition.


Brucellosis is an infectious disease that spreads from animals to people, mainly via unpasteurized dairy products. Travelers should take special care to avoid infection.

Bundle branch block

Cardiogenic shock


Chest pain

Coarctation of the aorta

Congenital heart defects in children

Congenital heart disease in adults

Conjoined twins

Conjoined twins are identical twins most often joined at the chest, head or pelvis. In some cases, conjoined twins can be surgically separated.

Dilated cardiomyopathy

Dressler's syndrome

Ebstein's anomaly

Ebstein's anomaly is a rare heart defect. Some people may not have any symptoms, but others may need treatment, including surgery.

Ehlers-Danlos syndrome

Eisenmenger syndrome

Eisenmenger syndrome, a complication of congenital heart defects, can be life-threatening if not properly treated. Find out more.

Enlarged heart

Enlarged heart is often a sign of a serious heart condition. Find out causes and treatments for enlarged heart.

Heart arrhythmias

Heart attack

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.

Heart failure

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.

High blood pressure in children

High blood pressure in children and adolescents is often caused by another health condition, but is usually treatable with diet and exercise.

Hypoplastic left heart syndrome

Hypoplastic left heart syndrome is a rare and complex congenital heart condition in which the left side of the heart is underdeveloped.

Kawasaki disease

Kawasaki disease — the leading cause of acquired coronary disease in children — causes artery wall inflammation throughout the body. It affects children younger than age 5.

Left ventricular hypertrophy

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.


Mitral valve disease

Mitral valve prolapse

Mitral valve prolapse occurs when the valve separating two of your heart's chambers malfunctions. The disorder usually isn't serious and often doesn't require surgical treatment.

Mitral valve stenosis

Myocardial ischemia


Myocarditis is a disease in which the heart muscle becomes inflamed and swollen, often as the result of an infection.

Noonan syndrome

Noonan syndrome is caused by a mutation in one of the genes responsible for normal development in many parts of the body, including the heart.

Orthostatic hypotension (postural hypotension)

Orthostatic hypotension (postural hypotension) is a form of low blood pressure that occurs when you stand up.

Patent ductus arteriosus (PDA)

Patent foramen ovale

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.


Premature birth

Pulmonary atresia

Pulmonary atresia is a heart defect that you're born with. Fortunately, treatment soon after birth and ongoing throughout childhood and adulthood greatly improve your prognosis.

Pulmonary edema

Pulmonary fibrosis

Pulmonary fibrosis results from scar tissue that forms in your lungs. This affects your ability to breathe and obtain enough oxygen.

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.

Pulmonary valve stenosis

Q fever

Rheumatic fever

Rheumatic fever, an inflammatory disease triggered by untreated or poorly treated strep throat, can cause permanent heart damage.

Sudden cardiac arrest

Sudden cardiac arrest is a medical emergency. Rapid treatment improves your chances of survival.

Tetralogy of Fallot

Transient ischemic attack (TIA)

Transposition of the great arteries

Tricuspid atresia

Tuberous sclerosis

Vasovagal syncope

Vasovagal syncope (fainting) is a sudden and brief loss of consciousness that occurs when the blood flow to your brain is markedly reduced.

Ventricular fibrillation

Ventricular septal defect

Ventricular tachycardia

Sept. 17, 2015