stress cardiomyopathy

Takotsubo cardiomyopathy (also called 'broken heart syndrome' or apical ballooning syndrome) is thought to result from a surge of catecholamines causing microvascular dysfunction, myocardial stunning, and direct catecholamine-mediated cardiotoxicity, leading to transient apical or mid-ventricular hypokinesis/akinesis with basal hyperkinesis—producing the characteristic 'octopus pot' (takotsubo) shape on ventriculography. Triggers include emotional stress (grief, fear), physical stress (surgery, sepsis, subarachnoid hemorrhage), or acute illness. Clinical presentation mimics acute coronary syndrome: chest pain, dyspnea, ST-segment elevation or T-wave inversion, and elevated troponin, but coronary angiography reveals no significant obstructive coronary artery disease. Echocardiography or ventriculography shows apical ballooning with preserved basal contraction. Diagnosis is often one of exclusion after ruling out ACS via angiography. Complications can include acute heart failure, cardiogenic shock, arrhythmias, LV outflow tract obstruction, and mural thrombus formation with risk of embolization. Management is largely supportive—beta-blockers, ACE inhibitors, and avoidance of catecholamines (e.g., avoid inotropes when possible); most patients recover normal LV function within days to weeks. Recurrence is possible. It is more common in postmenopausal women, suggesting a role for estrogen deficiency in vascular reactivity and catecholamine sensitivity.