Trigger-Negative Takotsubo Syndrome　― A Distinct Phenotype Prone to Recurrence ―

assessments, longer follow-up, and evaluations will be required to validate and further refine these findings. ConclusionsThis study provides important insights the recurrence of TTS and highlights the heterogeneity of this disorder.The of trigger-negative TTS as a phenotype prone to recurrence supports a shift from a stress-only paradigm toward a more nuanced, phenotype-oriented understanding of the syndrome.Although many questions remain unanswered, this study represents a meaningful step toward improving individual risk stratification and the long-term management of patients with TTS.