| مستخلص: |
AIM: The main objective is to investigate the value of the treadmill exercise test (TET) in relation to myocardial bridge through various clinical characteristic and risk factor for guiding the clinical therapy of myocardial bridging (MB) patients. METHOD: This was cross-sectional, single centre, observational prospective study conducted from January 2022 to June 2023. Total coronary angiography was performed on 4,321 cases of angina pectoris and suspected myocardial infarction at our hospital, 104 cases were confirmed as myocardial bridges, and exercise stress test was performed on 44 cases among them was investigated and evaluated the relationship between the TET results and the patients clinical characteristics, including sex, age, bridge length, reference diameter in systole and diastole and the degree of systolic stenosis. RESULTS: No Statistical differences were found between baseline clinical characteristic (age, sex, clinical features, ECG findings) between the Nobel I with less than 50% of systolic stenosis and the Nobel II with more than 50% of systolic stenosis. Quantitative coronary data in study population mean ref. vessel diameter was 2.41±0.33 mm, and the diastolic vessel diameter was 2.16±0.44 mm, 85% of the ref. vessel diameter, and the systolic vessel diameter was 1.16±0.43 mm, 46% of the ref. vessel diameter. The average systolic stenosis rate was 45±18% on average. The average myocardial bridge length was 11.86 ±4.92 mm, which did not match the degree of systolic compression. 44 patients performed the Treadmill exercise test in which 34 cases (77%) positive and 10 cases (23%) negative. No relationships were found between the quantitative coronary data, bridge length, lesion location, bridge compression, and Treadmill exercise test results and between the positive and negative groups. CONCLUSION: Our study found that patients with MB had high positive rate of treadmill exercise test. it is judged that various mechanisms other than simple mechanical compression may be involved as the cause of myocardial ischemic symptoms. The treadmill exercise test can improve our understanding of the characteristics of blood supply to them yo cardium,clarify whether MB can cause myocardial ischemia and help develop appropriate treatment strategies for MB patients [ABSTRACT FROM AUTHOR] |
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