| Summary: | Background Residual SYNTAX (Synergy between Percutaneous Coronary Intervention with Taxus and Cardiac Surgery) Score (RSS) is an objective measure for the assessment of degree and complexity of residual stenosis after the percutaneous coronary intervention (PCI).
Aim The study aimed at evaluating the role of angiographic complete (CR) and incomplete (ICR) revascularization on clinical outcomes in patients undergoing PCI for multivessel coronary artery disease (MVCAD). The study sought to investigate the role of initial and residual severity of coronary atherosclerosis in prognostication of patients with MVCAD who underwent PCI.
Material and Methods We retrospectively recruited 135 patients having MVCAD who underwent PCI. Coronary angiogram was used to assess the severity of coronary atherosclerosis. From the angiographic data baseline (BSS) and RSS were calculated. Subjects having a RSS of 0 were defined as having CR, and those having RSS > 0 are defined as ICR group. The study population was subgrouped into two groups as follows: CR, 0 (n = 17, 23%); ICR, >0 to 4 (n = 89, 47.2%). Clinical outcomes were measured, which included major adverse cardiac and cerebrovascular events (MACE) at 1 year.
Results Among the study subjects mean age was 57.25 ± 17.55. About 76.3% were males, and 23.7% were females. About 89.4% had diabetes, 88.6% had hypertension as risk factors, and 95.8% were smokers. The mean values of BSS and RSS were 20.2 ± 9.2 and 4.1 ± 7.0, respectively. Based on RSS the individuals were divided into two groups as follows: CR, 0 (n = 17, 23%); ICR, > 0 to 4 (n = 89, 47.2%), > 4 to 8 (n = 16, 21.6%), > 8 (n = 13, 17.55%). After 1 year, three patients lost the follow-up. Among the remaining 132 patients, those with higher BSS had more mortality and morbidity, and the difference is statistically significant (MACE in ≥23 vs. <23, p = 0.000755); 10 patients in the ICR group had MACE compared with 1 patient in CR group(5.8% in CR group vs. 8.6% in ICR group, p-value of 0.38); however, the difference was not statistically significant. However, higher RSS acts as an indirect marker of increasing morbidity and mortality when compared within the tertiles, and the difference was statistically significant (RSS 1–4 group vs. > 4 MACE, p = 0.0009559, RSS < 8 vs. >8 MACE, p = 0.00000172).
Conclusions This study proved that both BSS and higher RSS help to foretell the risk of adverse clinical outcomes in individuals with MVCAD who underwent PCI. RSS, which is an indirect marker of residual atherosclerosis, that is, ICR, had a positive correlation MACE after PCI.
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