Highlights the electrophysiological prerequisites, such as unidirectional block and slow conduction, for initiating sustained monomorphic ventricular tachycardia in infarcted hearts.
No immediate change to VT ablation practice; leaves open refinement of mapping to target functional block and transitional stages.
Initiation of sustained monomorphic VT requires the development of unidirectional block and formation of lines of functional block creating borders for a DP in areas of slow conduction. A transitional stage often exists during the initiation process before a stable VT circuit is established.
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Segal et al. (2009) studied this question.
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