• KoesbandonoInterventional Radiology Division, Department of Radiology, Faculty of Universitas Pelita Harapan, Tangerang 15811, Indonesia.Department of Radiology, Siloam Hospital Lippo Village, Tangerang 15811, Indonesia., Antonia Anna Lukito, Rusli Muljadi, Mira Yuniarti, Nyoman Aditya Sindunata, Andreyano Sarikie, Teodorus Alfons Pratama, Reynaldy Santosa Thio, Jessica Christanti, and Gilbert Sterling Octavius.
• Interventional Radiology Division, Department of Radiology, Faculty of Universitas Pelita Harapan, Tangerang 15811, Indonesia.
• Medicina (Kaunas). 2024 May 10; 60 (5).

AbstractBackground and Objectives: Myocardial bridging (MB) is still not yet considered a significant finding in Indonesia both radiographically and clinically. Hence, this article aims to assess the prevalence of MB using multi-detector computed tomography (MDCT) and look at factors contributing to stenosis amongst patients with MB. Materials and Methods: This study is cross-sectional in a single centre, with consecutive sampling, looking at all patients who underwent a multi-detector computed tomography (MDCT) scan from February 2021 until February 2023. GraphPad Prism version 9.0.0 for Windows (GraphPad Software, Boston, MA, USA) was used to analyse the results. Results: There are 1029 patients with an MB, yielding a prevalence of 44.3% (95%CI 42.3-46.4). The left anterior descending vessel is the most commonly implicated, with 99.6%. Among those with stenosis, the middle portion of the bridging vessel is the most common site of stenosis (n = 269), followed by the proximal portion (n = 237). The severity of stenosis is more often moderate, with 30-50% (n = 238). Females (odds ratio [OR] of 1.8, 95%CI 1.4-2.3; p-value < 0.0001), older age (t-value 5.6, p-value < 0.0001), symptomatic patients (OR 1.4, 95% CI 1.1-1.9; p-value = 0.013), and higher mean coronary artery calcium score (t-value 11.3, p-value < 0.0001) are more likely to have stenosis. The degree of stenosis is significantly higher in the proximal stenosis group than in the middle stenosis group (t-value 27, p-value < 0.0001). Conclusions: Our research demonstrates that MB may prevent atheromatosis of the coronary segment distal to the MB and predispose the development of atherosclerosis in the section proximal to the bridge.

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