The Living Guidelines: Recommendations for UA/NSTEMI in Prinzmetal’s Angina Suggest Revisions to the CLASS IIb Guidelines

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Class IIb Guidelines

 * 1) Percutaneous coronary intervention may be considered in patients with chest pain and transient ST segment elevation and a significant coronary artery stenosis. (Level of Evidence: B)
 * 2) Provocative testing may be considered in patients with no significant angiographic CAD and no documentation of transient ST segment elevation when clinically relevant symptoms possibly explained by coronary artery spasm are present. (Level of Evidence: C)