Table Causes of Heart Failure Type Examples Cardiac Myocardial damage Cardiomyopathy Myocardial infarction Myocarditis Some chemotherapy drugs Valvular disorders Aortic stenosis Mitral regurgitation Tricuspid regurgitation Arrhythmias Bradyarrhythmias Tachyarrhythmias Conduction defects AV node block Left bundle branch block Reduced substrate availability (eg, of free fatty acids or glucose) Ischemia Infiltrative or matrix disorders Amyloidosis Chronic fibrosis (eg, systemic sclerosis) Hemochromatosis Systemic Disorders that increase demand for CO Anemia Hyperthyroidism Paget disease Disorders that increase resistance to output (afterload) Aortic stenosis Hypertension AV = atrioventricular; CO = cardiac output.