Assessment of Predictors of Side Branch Occlusion after Main Vessel Stenting in Coronary Bifurcation Lesions in Patients Undergoing Percutaneous Coronary Intervention.

Abstract

To determine the frequency of side branch (SB) occlusion during percutaneous coronary intervention (PCI) with stenting of bifurcation lesions and to assess the predictors of side branch occlusion in local population. Cross-sectional study. Cardiac Catheterization Lab, Rawalpindi Institute of Cardiology, Rawalpindi, from July 2016 to January 2017. A total of 200 patients fulfilling the inclusion criteria were included in the study with non-probability consecutive sampling technique. Variables like diameters and lesion lengths of main vessel and side branch were recorded using quantitative coronary analysis software (QCA). The SB occlusion was defined as <3 TIMI score following main vessel PCI with stenting. The data was analysed using SPSS version 21.0. Mean age (years) of the study population was 52.27 ±13.33 including 180 (90.0%) male and 20 (10.0%) female patients. SB occlusion was observed in 15 (7.5%) of cases. Mean SB diameter was significantly larger in cases without SB occlusion than those with SB occlusion (2.06 ±0.09 vs. 2.17 ±0.26, p=0.003). Similarly, SB lesions were significantly shorter in length in those without SB occlusion than those with SB occlusion (3.53 ±0.51 and 4.66 ±3.11, p<0.001). However, mean MV diameter (mm) and mean MV lesions length (mm) in both the groups were statistically not significant. Mean SB diameter and lesion length are useful predictors of SB occlusion during stenting of bifurcation lesions in the local population.