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KMID : 1011920200210010008
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International Journal of Arrhythmia
2020 Volume.21 No. 1 p.8 ~ p.8
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The relationship between J wave and ventricular tachycardia during Takotsubo cardiomyopathy
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Choi Seong-Huan
Lee Oh-Hyun
Yoon Gwang-Seok
Kwon Sung-Woo
Shin Sung-Hee
Park Sang-Don
Woo Seong-Ill
Kwan Jun
Kim Dae-Hyeok
Baek Yong-Soo
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Abstract
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Background and objectives: Takotsubo cardiomyopathy (TTC) occasionally causes life-threatening ventricular arrhythmia. J wave on surface electrocardiography (sECG) has also been associated with idiopathic ventricular fibrillation and cardiac events; therefore, we investigated whether the presence of J wave on sECG is a potential risk factor for ventricular arrhythmia in patients with TTC.
Subjects and methods: We performed a retrospective study in 79 patients who were diagnosed with TTC from 2010 to 2014. Among them, 20 (25.3%) were diagnosed with ventricular tachycardia (VT). The J wave on the sECG was defined as J point elevation manifested through QRS notching or slurring at least 1 mm above the baseline in at least two leads.
Results: A higher prevalence of ventricular tachycardia was observed in patients with J wave. The corrected QT interval (QTc) was significantly longer in the VT group than in the non-VT group. In a multivariate analysis, the presence of J wave appeared to be the only independent predictors of VT [Hazard Ratio (HR) 3.5, p?=?0.019].
Conclusion: Our results suggest that the presence of J wave on the sECG is significantly associated with VT, and appear to indicate that the presence of J wave is a strong and independent predictor of VT in patients with TTC.
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KEYWORD
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J wave, Ventricular tachycardia, Takotsubo cardiomyopathy
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