May Be Caused by

 Common

Aortic stenosis

Cardiomyopathy

High output heart disease

Hypertension

Left ventricular failure

Mitral insufficiency

Mitral stenosis

Myocardial ischemia

 Uncommon

Airway obstruction

Aortic insufficiency

Coarctation syndrome

Hypoplastic left heart syndrome

Left atrial myxoma

Left atrial thrombus

Obstruction of pulmonary veins

Parachute mitral valve complex

Peripheral arteriovenous malformations