Diagnosis and Therapy of Tachycardiomyopathy:
No strict criteria exist.
Diagnosis is established by excluding other causes of cardiomyopathy.
The ventricular rate that causes cardiomyopathy is not known, although rates >100 bpm for prolonged periods are considered to be responsible.
PVCs should be >20 000 beats/day to account for the cardiomyopathy (or alternatively a 24-hour burden of >24% on Holter), although ectopy-induced cardiomyopathy has been reported in a patient with only 5502 beats/day.
There is considerable evidence that LV function improves approximately 3 months following restoration of normal heart rate.
In inappropriate sinus nodal tachycardia, beta-blockers are indicated.
Catheter ablation is indicated in cases of accessory pathways, idiopathic VT, and monomorphic VPBs.
Our next type of cardiomyopathy would be Tachycardiomyopathy:
The term denotes tachycardia-induced cardiomyopathy.
Tachycardia is a reversible cause of impaired left ventricular function that can lead to heart failure and death.
Very frequent premature ventricular contractions may also be a cause of cardiomyopathy.