Rates of revascularization and PCI: CABG ratio: a new indicator predicting in-hospital mortality in acute coronary syndromes


Advocate Illinois Masonic Medical Center


OBJECTIVE: The principal trend in acute coronary syndrome (ACS) is increasing utilization of percutaneous coronary interventions (PCI) and declining coronary artery bypass graft surgery (CABG) utilization. This study was designed to evaluate whether higher PCI:CABG ratios lead to higher in-hospital PCI or CABG mortality.

METHODS: The National Readmission Database for years 2016 was queried for all hospitalized ACS patients who underwent coronary revascularization during their admission. The study population was derived from 355 US hospitals and included 103 021 patients. Hospitals were grouped based on their PCI:CABG ratio into low, intermediate, and high ratio quartiles with a median [interquartile ranges (IQR)] PCI:CABG ratio of 2.9 (2.5-3.2), 5.0 (4.3-5.9) and 8.9 (7.8-10.3), respectively multivariable logistic regression with adjustment for age, demographics and comorbidities were used to identify CABG:PCI ratio related risk for in-hospital CABG and PCI mortality.

RESULTS: Higher PCI:CABG ratios correlated with an increased CABG mortality. There was a median (IQR) mortality of 2.5% (1.6-4.3) in the low ratio quartile; 3.1% (1.9-5.3) in the intermediate quartiles; and 5.3% (3.2-9.1) in the high ratio quartile (P < 0.001). On multivariate analysis, the PCI:CABG ratio was associated with an increased risk for CABG mortality with an adjusted odds ratio of 1.38 (95% CI, 1.14-1.67, P < 0.001) and 2.17 (95% CI, 1.70-2.80, P < 0.001) for hospitals with intermediate and high PCI:CABG ratios, respectively. There was no significant association between PCI:CABG ratio and PCI mortality.

CONCLUSIONS: The programmatic PCI:CABG ratio is a valid indicator of optimal case selection. The PCI:CABG ratio correlates with in-hospital mortality in ACS.

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