Prognostic value of cardiac magnetic resonance global T2 mapping in patients with Takotsubo syndrome

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ID: 328011
2026
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Abstract
BACKGROUND: Myocardial oedema is a hallmark of Takotsubo syndrome (TTS). Cardiac magnetic resonance (CMR) T2 mapping quantifies myocardial oedema, but its prognostic value in TTS is unclear. We evaluated the association between CMR-derived global myocardial T2 and major adverse cardiovascular and cerebrovascular events (MACE). METHODS: : We retrospectively identified consecutive TTS patients undergoing CMR with tissue mapping within 30 days of admission. Imaging was re-analysed blinded to clinical data. The primary endpoint was MACE (all-cause death, heart failure hospitalisation, recurrent TTS, stroke, or transient ischaemic attack). Time-dependent ROC analysis derived a T2 threshold. Prespecified covariates were summarised by ridge-penalised Cox into a single linear predictor for adjustment. A Firth-penalised Cox model tested robustness. RESULTS: Among 110 patients (median age 68 years; 91% women), median global T2 was 56 ms (IQR 53-60), and 17 (15.5%) experienced MACE over a median follow-up of 763 days (IQR 525-1357). T2 ≥63 ms predicted 1-year MACE (AUC 0.671, sensitivity 56%, specificity 89%) and separated Kaplan-Meier curves (log-rank p=0.003). In ridge-penalised Cox models, each 5-ms increase in global T2 was associated with MACE (HR 1.40, 95% CI 1.06-1.87; p=0.020). This association was also observed after adjustment in the Firth-penalised model (HR 1.70, 95% CI 1.20-2.40; p=0.004). An internally derived threshold of T2 ≥63 ms was also associated with MACE but showed modest 1-year discrimination (AUC 0.671). CONCLUSIONS: Global myocardial T2 may provide incremental prognostic information beyond prespecified clinical and imaging indices in TTS and refine risk stratification.
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Authors Yoshito Kadoya, J.S. Lim, Mohammed Alaqaili, Jamilah Mohammed Al-Harbi, Pape-Mamadou Sene, Mohammed El Mehdi El Yamani, Rebecca E Thornhill, Andrew Crean, D. Ian Paterson
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Journal European Heart Journal - Cardiovascular Imaging
Year 2026
DOI
10.1093/ehjci/jeag243
URL
https://doi.org/10.1093/ehjci/jeag243
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