Letter Regarding Article by Schmidt et al, “Infarct Tissue Heterogeneity by Magnetic Resonance Imaging Identifies Enhanced Cardiac Arrhythmia Susceptibility in Patients With Left Ventricular Dysfunction”
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To the Editor:
I read with interest the article by Schmidt et al.1 The authors have made an important observation relating differences in signal intensity on contrast-enhanced magnetic resonance imaging, used as an index of tissue heterogeneity, to inducibility of monomorphic ventricular tachycardia (MVT). The electrophysiological testing, as described by the authors, has important features that should be highlighted because they may affect the interpretability of the results. The authors report that electrophysiological testing was performed in standard fashion (3 extrastimuli at 2 different cycle lengths …