<unk>  <unk>  is a disease where prolonged<unk>  (a fast heart rate) or arrhythmia (an irregular heart rhythm) causes an impairment of the myocardium (heart muscle), which can result in heart failure. People with<unk>  may have symptoms associated with heart failure (e.g. shortness of breath or ankle swelling) and/or symptoms related to the<unk>  or arrhythmia (e.g. palpitations). Though atrial fibrillation is the most common cause of<unk> , several<unk> s and arrhythmias have been associated with the disease. There are no formal diagnostic criteria for<unk> . Thus,<unk>  is typically diagnosed when (1) tests have excluded other causes of cardiomyopathy and (2) there is improvement in myocardial function after treatment of the<unk>  or arrhythmia. Treatment of<unk>  can involve treating the heart failure as well as the<unk>  or arrhythmia.<unk>  has a good prognosis with treatment, with most people recovering some to all of their heart function. The number of cases that occur is unclear.<unk>  has been reported in all age groups.
Tachycardia-induced cardiomyopathy
Alcoholic cardiomyopathy
Coxsackievirus-induced cardiomyopathy
Arrhythmogenic cardiomyopathy
Uremic pericarditis
Ischemic cardiomyopathy
Viral cardiomyopathy
Diabetic cardiomyopathy