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Editorial
The authors argue against combining epicardial and microvascular spasm under the single term 'coronary spasm' as proposed in a previous study.
To the Editor:Ong and coworkers 1 reported that epicardial and microvascular spasm were frequent in white patients with unobstructed coronary arteries and that epicardial spasm was most often diffuse and located in the distal coronary segments.They combine epicardial and microvascular spasm together as coronary spasm and speculated that epicardial spasm is probably a sign of concomitant microvascular disease. 1 Their findings are interesting and in agreement with those of previous studies regarding epicardial spasm or coronary spasm. 2 However, we take issue with them when they combine epicardial and microvascular spasm together as coronary spasm for the following reasons:
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Yasue et al. (2015) studied this question.
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