Key result
Takotsubo cardiomyopathy patients presenting with QT prolongation had a significantly higher prevalence of cardiogenic shock (46% vs 24%) and required more frequent hemodynamic support than those without.
Why the study?
Does QT prolongation correlate with worse clinical, laboratory, and echocardiographic features in patients with takotsubo cardiomyopathy?
Population
105 consecutive patients with takotsubo cardiomyopathy enrolled from a registry database across two tertiary…
Comparison
Presence of QT prolongation vs Absence of QT prolongation
Design
Cohort, All components of ECGs were analyzed by 2 experienced cardiologists…
Follow-up
median 5.7 years (IQR, 4.9-6.8 years)
Authors
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QT prolongation may flag higher-risk Takotsubo cases for closer monitoring; leaves open independent prognostic value and need for prospective validation.
Observational (n=105)
Yes
Does QT prolongation correlate with worse clinical, laboratory, and echocardiographic features in patients with takotsubo cardiomyopathy?
Absolute Event Rate: 46% vs 24%
p-value: p=0.016
In patients with takotsubo cardiomyopathy, QT prolongation at presentation is associated with a more severe clinical course, including higher rates of cardiogenic shock, life-threatening arrhythmias, and reduced left ventricular ejection fraction.
Song et al. (2014) conducted an observational in Takotsubo cardiomyopathy (n=105). QT prolongation vs. No QT prolongation was evaluated on Cardiogenic shock (p=0.016). Takotsubo cardiomyopathy patients presenting with QT prolongation had a significantly higher prevalence of cardiogenic shock (46% vs 24%) and required more frequent hemodynamic support than those without.
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