Abstract
Takotsubo cardiomyopathy, or "broken heart syndrome," is a condition characterized by transient left ventricular dysfunction, typically triggered by intense emotional or physical stress. While initially thought to follow primarily negative life events, such as grief or fear, a subset of cases now recognized as "happy heart syndrome" occur instead after positive emotional triggers, such as celebrations, romantic moments, or good news. This review summarizes the current understanding of takotsubo syndrome (TTS) precipitated by joyful events, focusing on novel insights from the largest registry analysis to date of 37 "happy heart" cases from the international, multicenter GEIST registry. Compared with the more common negative emotional trigger group, these patients had a higher prevalence of men and atypical midventricular ballooning patterns. While event rates trended lower, likely due to the small sample size, acute complications, such as pulmonary edema, and long-term mortality did not definitively differ. The pathophysiology of "happy heart syndrome" remains unclear but implicates differences in central autonomic processing and peripheral catecholamine responses to positive vs negative emotional stimuli. Several key outstanding questions are highlighted, including understanding susceptibility factors, confirming prognostic differences, and leveraging insights into underlying brain-heart circuitry. Ultimately, dedicated research into this rare but fascinating condition could provide broader mechanistic insights and therapeutic opportunities for the prevention and management of all takotsubo phenotypes at the nexus of mind, brain, and heart.