Interplay Between Myocardial Bridging and Coronary Spasm in Patients With Myocardial Ischemia and Non-Obstructive Coronary Arteries: Pathogenic and Prognostic Implications.
Background Myocardial bridging (MB) may represent a cause of myocardial ischemia in patients with non-obstructive coronary artery disease (NOCAD). Herein, we assessed the interplay between MB and coronary vasomotor disorders, also evaluating their prognostic relevance in patients with myocardial infarction and non-obstructive coronary arteries (MINOCA) or stable NOCAD. Methods and Results We prospectively enrolled patients with NOCAD undergoing intracoronary acetylcholine provocative test. The incidence of major adverse cardiac events, defined as the composite of cardiac death, non-fatal myocardial infarction, and rehospitalization for unstable angina, was assessed at follow-up. We also assessed angina status using Seattle Angina Questionnaires summary score. We enrolled 310 patients (mean age, 60.6±11.9; 136 [43.9%] men; 169 [54.5%] stable NOCAD and 141 [45.5%] MINOCA). MB was found in 53 (17.1%) patients. MB and a positive acetylcholine test coexisted more frequently in patients with MINOCA versus stable NOCAD. MB was an independent predictor of positive acetylcholine test and MINOCA. At follow-up (median, 22 months; interquartile range, 13-32), patients with MB had a higher rate of major adverse cardiac events, mainly driven by a higher rate of hospitalization attributable to angina, and a lower Seattle Angina Questionnaires summary score (all P<0.001) compared with patients without MB. In particular, the group of patients with MB and a positive acetylcholine test had the worst prognosis. Conclusions Among patients with NOCAD, coronary spasm associated with MB may predict a worse clinical presentation with MINOCA and a higher rate of hospitalization attributable to angina at long-term follow-up with a low rate of hard events.
['Montone|Rocco A|RA|', 'Gurgoglione|Filippo Luca|FL|', 'Del Buono|Marco Giuseppe|MG|', 'Rinaldi|Riccardo|R|', 'Meucci|Maria Chiara|MC|', 'Iannaccone|Giulia|G|', 'La Vecchia|Giulia|G|', 'Camilli|Massimiliano|M|', "D'Amario|Domenico|D|", 'Leone|Antonio Maria|AM|', 'Vergallo|Rocco|R|', 'Aurigemma|Cristina|C|', 'Buffon|Antonino|A|', 'Romagnoli|Enrico|E|', 'Burzotta|Francesco|F|', 'Trani|Carlo|C|', 'Crea|Filippo|F|', 'Niccoli|Giampaolo|G|']
D000109:Acetylcholine D017023:Coronary Angiography D003324:Coronary Artery Disease D003329:Coronary Vasospasm D003331:Coronary Vessels D003937:Diagnosis, Differential D004562:Electrocardiography D005260:Female D005500:Follow-Up Studies D006801:Humans D015994:Incidence D007269:Injections, Intra-Arterial D008297:Male D008875:Middle Aged D054084:Myocardial Bridging D017202:Myocardial Ischemia D011379:Prognosis D011446:Prospective Studies D012307:Risk Factors D012384:Rome D014664:Vasodilation D014665:Vasodilator Agents
myocardial bridging coronary spasm myocardial ischemia MINOCA prognosis acute coronary syndrome