Introduction Tachycardiomyopathy (TCM) is a rare, but potentially reversible cause of cardiomyopathy and cardiogenic shock. It is defined by a global left ventricular systolic dysfunction secondary to persistent tachyarrhythmia, with partial (in patients with previous structural disease), or total recovery (in patients without previous structural disease) after cardiac rhythm normalization. The most commonly implicated arrhythmia is atrial fibrillation. The hemodynamic changes that characterize the patient with TCM include: increase in ventricular telediastolic and telesystolic volumes, global hypokinesis, increase in ventricular […]