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Tachycardia induced cardiomyopathy, also known as chronotropic cardiomyopathy and tachycardiomyopathy, is an impairment of the pumping efficiency of the myocardium (the muscle of the heart) due to prolonged periods of a fast heart rate or irregular heart rhythm. It was first described by Phillips and Levine in 1949. and can occur at any age. The rate and duration of the elevation in heart rate necessary to cause a cardiomyopathy is unclear and is likely dependent on a number of unknown factors. The incidence of tachycardia induced cardiomyopathy (TIC) is unknown, and to this date, much of the understanding of this cardiomyopathy is based upon animal models.〔 ==Treatment== The primary treatment for a tachycardia induced cardiomyopathy is correcting the underlying tachycardia (e.g. ablating an ectopic focus). Supportive agents such as beta blockers and ACE inhibitors / angiotensin receptor blockers are of benefit to try to prevent remodeling of the left ventricle. If the tachycardia can be abolished, the heart muscle can recover after some time. Not only is there a need to control the tachycardia that is responsible for causing tachycardia induced cardiomyopathy, but also treating underlying conditions that cause tachycardia. For instance, treatment of hyperthyroidism can also lead to reversal of tachycardia induced cardiomyopathy. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tachycardia-induced cardiomyopathy」の詳細全文を読む スポンサード リンク
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