Association of cumulative systolic blood pressure load with cardiovascular events in patients undergoing percutaneous coronary intervention

Abstract Background Cumulative systolic blood pressure (SBP) load is a measure that considers both the magnitude and duration of elevated BP. The aim of this study was to evaluate the association between cumulative SBP load and the risk of cardiovascular events in patients following percutaneous coronary intervention. Methods Consecutive patients who underwent PCI between 2012 and 2016 were included. Cumulative SBP load was calculated as the area under the curve for SBP values ≥130 mm Hg divided by the total area under the curve for all measured SBP values during a 1-year period following PCI. The co-primary outcomes included net adverse clinical events (NACE) and major adverse cardiac and cerebrovascular events (MACCE) over a 3-year period. NACE was defined as a composite of MACCE (including all-cause death, non-fatal myocardial infarction (MI), non-fatal stroke, or any revascularization) or major bleeding. Results A total of 2,006 patients were included, among whom 253 (12.6%) experienced NACE during the follow-up period. Each 1-SD increase in cumulative SBP load was associated with a 28.7% increase in NACE (adjusted hazard ratio [aHR]: 1.287; 95% confidence interval [CI]: 1.160-1.428) and a 35.8% increase in MACCE (aHR: 1.358; 95% CI: 1.207-1.529). Furthermore, patients in the highest (third) SBP load group had a significantly higher risk of NACE (aHR: 1.672; 95% CI: 1.149-2.433) and MACCE (aHR: 1.722; 95% CI: 1.249-2.372) compared to those in the lowest (first) SBP load group. Conclusions Among patients undergoing PCI, there is a significant correlation between cumulative SBP load and clinical events. These findings emphasize the importance of accounting for both the magnitude and duration of elevated SBP in secondary cardiovascular prevention.