Many factors can cause heart conditions that need medical or surgical attention.

Some of these are a result of structural disorders, such as birth defects. Some are the result of disorders of the electrical signals of the heart such as abnormal heart rhythms. Others are caused by muscular problems such as when a heart attack causes blood to stop flowing to the muscles of the heart. Finally, other conditions are caused by problems with the blood flow through the heart such as disorders of the valves of the heart or arteries that are blocked by plaque.

More detailed information is available on the following heart conditions:

• Abnormal heart rhythms (atrial fibrillation)
• Amyloidosis
• Angina
• Aneurysm - aortic
• Aortic valve stenosis
• Arrhythmia
• Atrial ectopic beats
• Atrial fibrillation and atrial flutter
• Atrial septal defect (ASD)
• Atrioventricular canal defect
• Blood pressure (high)
• Brugada syndrome
• Bundle branch block
• Cardiac tumors
• Cardiomyopathy
• Coarctation of the aorta
• Congenital heart disease
• Coronary artery disease
• Heart attack
• Heart failure
• High cholesterol
• Pulmonic valve stenosis
• Ventricular septal defect