Tachycardia-induced cardiomyopathy

Tachycardia-induced cardiomyopathy
Classification and external resources
Specialty cardiology
ICD-10 I42.9

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.[1] It was first described by Phillips and Levine in 1949.[2] and can occur at any age.[3]

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.[1]

Treatment

The primary treatment for a tachycardia induced cardiomyopathy is correcting the underlying tachycardia (e.g. ablating an ectopic focus[4]). 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.[5]

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.

See also

References

  1. 1 2 Ellis, ER; Josephson, ME (December 2013). "Heart failure and tachycardia-induced cardiomyopathy.". Current heart failure reports 10 (4): 296–306. doi:10.1007/s11897-013-0150-z. PMID 23963583.
  2. ↑ Phillips, E; Levine, SA (1949). "Auricular fibrillation without other evidence of heart disease: a cause of reversible heart failure". Am J Med 7: 478–489. doi:10.1016/0002-9343(49)90397-6. PMID 18140546.
  3. ↑ Juneja R, Shah S, et al. (2002). "Management of cardiomyopathy resulting from incessant supraventricular tachycardia in infants and children". India Heart J 54 (3-4): 176–180. PMID 12086381.
  4. ↑ Walker, N L (2004). "Tachycardiomyopathy: a diagnosis not to be missed". Heart 90: e7. doi:10.1136/hrt.2003.017129. PMID 14729812.
  5. ↑ Calo L, Sciarra L, Scioli R, Lamberti F, Loricchio ML, Pandozi C, Santini M. (2005). "Recovery of cardiac function after ablation of atrial tachycardia arising from the tricuspid annulus.". Ital Heart J. 6 (8): 652–7. PMID 16161499.
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