Clinical presentation of takotsubo syndrome
Takotsubo syndrome (TTS), also known as stress cardiomyopathy, left ventricular apical ballooning syndrome, and broken heart syndrome, is a syndrome of acute heart failure and transient ventricular dysfunction that is frequently precipitated by acute emotional or physical stress. A wide variety of emotional and physical stressors have been associated with this syndrome, and while acute stress is temporally related to syndrome onset in the majority of patients, a subset of patients have no identifiable antecedent trigger at the time of presentation. The syndrome has a striking predilection for older postmenopausal women, though it has been reported in men and in younger patients as well. The incidence of TTS is higher than initially thought and accounts for up to 5–10% of women presenting with a suspected acute coronary syndrome. Several groups have proposed variable criteria for the diagnosis of TTS, but universally accepted criteria are currently lacking. While patients with TTS typically present with chest pain, dynamic electrocardiographic changes, and elevated cardiac biomarkers, characteristic features of the syndrome that help to distinguish it from an acute myocardial infarction include the absence of plaque rupture and coronary thrombosis, unique patterns of ventricular dysfunction that typically involve more than one vascular territory, and rapid and complete recovery of ventricular systolic function. While the prognosis associated with TTS is generally favourable, the condition is not benign and has been associated with serious complications such as cardiogenic shock, thromboembolic events, and life-threatening arrhythmias. This chapter will highlight the clinical features that characterize TTS and that are central to its diagnosis.