Relationship between quality of coronary collateral and myocardial viability in chronic total occlusion: a magnetic reso
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ORIGINAL PAPER
Relationship between quality of coronary collateral and myocardial viability in chronic total occlusion: a magnetic resonance study Khaled Abdel‑Azim Shokry1 · El‑Sayed Mohamed Farag2 · Ahmed Mohamed Hassan Salem2 · Mahmoud Abdelaziz3 · Ahmed El‑Zayat4 · Ismail Mohamed Ibrahim3 Received: 22 May 2020 / Accepted: 12 September 2020 © Springer Nature B.V. 2020
Abstract Revascularization of chronic total occlusion (CTO) is still debated regarding its indications and therapeutic benefits. Guidelines recommend patient selection based on ischemia detection and viability assessment. We aimed to investigate the relationship between the quality of coronary collaterals (CC), graded by Rentrop classification, and myocardial viability assessed by cardiovascular magnetic resonance (CMR). Unselected 100 consecutive patients with a single CTO were prospectively enrolled. CC of Rentrop grade two or three were considered as well-developed. Analyzing late gadolinium enhancement (LGE) images, CTO territories with mean segmental transmural scar extent 130 mg/dL, triglycerides > 150 mg/ dL, high-density lipoprotein-cholesterol
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