In Cox multivariate regression model analysis, the outcome was ventilator weaning, the time was days of mechanical respiratory assistance treatment, the start time was the time of admission to the intensive care unit, and the follow-up time was 30 days. PASP has an independent effect on events after adjusting for potential confounders, including time. The adjusted hazard ratio (HR) for 1 mmHg increase in PASP was 0.94 (95% CI 0.90‒0.97) for weaning events (P < 0.001 ). Abbreviations: HR, hazard ratio; CI, confidence interval; PASP, pulmonary artery systolic pressure; IVSd, interventricular end-diastolic thickness; **P < 0.01 .