Long-term Risk of Death and Hospitalization in Patients With Heart Failure and Takotsubo Syndrome: Insights From a Nationwide Cohort.

BACKGROUND:Data concerning the long-term risk of heart failure (HF) in patients with takotsubo syndrome (TTS) are sparse. We compared the rates of death and hospitalization due to HF with matched individuals from the background population and patients with ST-segment elevation myocardial infarction (STEMI). METHODS:In this nationwide observational cohort study, all patients with first-time TTS (2011-2018) who were alive at discharge were identified by using data from Danish nationwide registries. These were matched for age and sex with individuals from the background population (1:4 matching) and with patients with STEMI who were alive at discharge (1:3 matching). RESULTS:A total of 881 patients with TTS who were alive at discharge were identified (median age 70 years; 89.4% men). During a mean follow-up of 2.9 years, the incidence rates of death, HF hospitalization, and TTS recurrence in survivors of TTS were 6.9, 0.9 and 1.1 events per 100 person-years. The corresponding absolute 3-year risks were 9.3%, 1.8% and 2.5%, respectively. Survivors of TTS had higher associated rates of death compared with the background population (hazard ratio [HR] 2.05 [95% CI, 1.62-2.60]) and survivors of STEMI (HR 1.69 [1.34-2.13]). Similarly, survivors of TTS had higher associated rates of hospitalization due to HF compared with the background population (HR 4.24 [1.88-9.53]), but lower rates compared with survivors of STEMI (HR 0.34 [0.20-0.56]). Propensity-score matched analyses yielded similar results. CONCLUSIONS:Survivors of TTS had significantly higher associated mortality rates than the background population and survivors of STEMI. Survivors of TTS had lower HF hospitalization rates than survivors of STEMI, but the rates were higher than those of the background population.