Impact of completeness of revascularisation on long-term outcomes in patients with multivessel disease undergoing PCI

AIMS: We aimed to study long-term clinical outcomes in patients with multivessel disease (MVD) undergoing percutaneous coronary intervention (PCI) over the last 10 years with respect to the completeness of revascularisation at a tertiary care hospital. METHODS AND RESULTS: A total of 2,960 consecutive MVD patients taken for PCI between 2008 to 2017 were enrolled in the study with baseline demographic, procedural, and follow-up details retrieved from custom-made departmental software. Of those, 2,598 patients with follow-up details constituted the study cohort. Complete revascularisation (CR) was achieved in 1,854 (71.4%) and incomplete revascularisation (IR) in 744 (28.6%) patients. Propensity matching was performed and 740 matched pairs identified in the two groups. The primary endpoint was survival free of any major adverse cardiovascular events (MACE) with each individual MACE event being a secondary endpoint. IR occurred more often in patients with acute coronary syndrome (64.1% vs 58.3%, p=0.003), complex lesion intervention (40.7% vs 29.6%, p<0.001) and in those with mean stent length ≥38 mm per vessel intervened (21.0% vs 13.5%, p<0.001). Median follow-up was 54 months (interquartile range: 31-84 months). After propensity matching, CR resulted in a better survival free of all adverse events, i.e., 86.4% vs 81.1% (HR 1.52, CI: 1.21-2.02; p<0.01). Individual MACE endpoints were, however, not statistically different between the groups. CONCLUSIONS: In MVD patients undergoing PCI, CR results in better survival free of all adverse events including all-cause mortality, non-fatal MI, repeat revascularisation and recurrent angina.