ĐẶC ĐIỂM CỘNG HƯỞNG TỪ TRÊN BỆNH NHÂN TIM THIẾU MÁU CỤC BỘ ĐIỀU TRỊ TẠI BỆNH VIỆN QUÂN Y 175

Abstract

Objective: To describe cardiac magnetic resonance (CMR) characteristics in patients with ischemic heart disease treated at Military Hospital 175. Subjects and Methods: A prospective descriptive study was conducted on 88 patients with ischemic heart disease treated at Military Hospital 175 between June 2023 and June 2025. Results: The study included 88 patients with a mean age of 63.4 ± 10.6 years; males accounted for 75.0%. Acute myocardial infarction was the most prevalent clinical entity, observed in 61/88 patients (69.3%), followed by previous myocardial infarction in 17/88 (19.3%) and chronic coronary syndrome in 10/88 (11.4%). On CMR, regional wall motion abnormalities were detected in 100% of patients. Myocardial edema was present in 50 patients (56.8%), and myocardial thinning was observed in 8 patients (9.1%). Left ventricular ejection fraction (LVEF) ≤50% was found in 51/88 patients (58.2%), including 18/88 patients (20.5%) with LVEF ≤40%. Transmural late gadolinium enhancement (LGE) was identified in 41 patients (46.6%), predominantly distributed in the left anterior descending coronary artery territory (65.5%). Microvascular obstruction was detected in 33 patients (37.5%), and left ventricular thrombus was present in 1.1%. LGE sequences demonstrated high sensitivity for detecting significant coronary artery stenosis (≥50%), with a sensitivity of 95.4% and a positive predictive value of 91.2%; specificity and negative predictive value were 73.9% and 85.0%, respectively. Conclusion: Cardiac magnetic resonance provides a comprehensive assessment of myocardial injury characteristics in patients with ischemic heart disease. Late gadolinium enhancement sequences have high diagnostic value in detecting myocardial damage associated with significant coronary artery stenosis, with high sensitivity and positive predictive value.