Intercoronary and intracoronary communications may provide partial protection against myocardial ischemia during vasospastic episodes.
May suggest partial protection by coronary communications in spasm; hypothesis-generating case report requiring prospective validation.
Persistent intercoronary and intracoronary communications were observed on cineangiograms in four patients having vasospastic angina without significant coronary narrowings. On provocation of coronary spasm using ergonovine maleate, these communications seemed to protect myocardium from ischemia, at least partially.
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Takatsu et al. (1989) studied this question.
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