Key result
J-wave, T-wave, and mechanical alternans precede polymorphic VT in acute takotsubo cardiomyopathy.
Why the study?
The relationship between prominent J-wave and T-wave alternans and mechanical alternans in takotsubo cardiomyopathy during the acute phase was not well characterized.
Prominent J-wave and T-wave alternans may precede polymorphic ventricular tachycardia in the acute phase of takotsubo cardiomyopathy and resolve with myocardial recovery.
Answers are grounded in this paper and cite their sources.
May signal imminent polymorphic VT in acute takotsubo; hypothesis-generating observation requiring prospective validation.
A 74-year-old woman with takotsubo cardiomyopathy developed polymorphic ventricular tachycardia during the acute phase. She exhibited prominent J-wave and T-wave alternans preceding ventricular tachycardia. These abnormalities disappeared after recovery from myocardial stunning.
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Hojo et al. (2014) studied this question. Prominent J-wave and T-wave alternans associated with mechanical alternans preceded polymorphic ventricular tachycardia in acute takotsubo cardiomyopathy and resolved after recovery.
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