Atrial Tachycardia-Induced Cardiomyopathy in Late Pregnancy: It Is Not Always Peripartum Cardiomyopathy.

Tachycardia-mediated cardiomyopathy is an established cause of left ventricular dysfunction. The development of cardiomyopathy depends on type, rate, and duration of tachyarrhythmia. Early recognition and treatment are critical in preventing left ventricular dysfunction and heart failure. Normal physiologic changes in pregnancy can complicate the early recognition and treatment of pathologic tachyarrhythmia.