ORBI Score Validation as Predictor of Cardiogenic Shock in Patients With St Elevation Myocardial Infarction in Two...

Area of Science:

• Cardiology
• Clinical Prediction Models

Background:

• Cardiogenic shock (CS) following ST-segment elevation myocardial infarction (STEMI) carries a high in-hospital mortality rate of 50%.
• The ORBI score has been developed to identify patients at risk of developing CS after primary angioplasty.

Purpose of the Study:

• To validate the predictive performance of the ORBI score for CS in a cohort of patients with STEMI in Argentina.
• To assess the score's discrimination and calibration within this specific population.

Main Methods:

• Retrospective analysis of 424 patients with STEMI from two centers in the Buenos Aires Metropolitan Area.
• Evaluation of the ORBI score's predictive value using Area Under the Receiver Operating Characteristic Curve (AUC-ROC) for discrimination and the Hosmer-Lemeshow (HL) test for calibration.

Main Results:

• The incidence of CS was 8.5% in the analyzed cohort.
• Patients who developed CS had a significantly higher median ORBI score (10) compared to those without CS (5) (P < 0.0001).
• The ORBI score demonstrated good predictive capacity with an AUC-ROC of 0.80 (95% CI 0.73-0.87) and adequate calibration (HL X² = 4.26, P = 0.74).

Conclusions:

• The ORBI score shows adequate predictive capacity and calibration in an Argentinian cohort of STEMI patients.
• These findings suggest that the ORBI score can be a valuable tool for identifying patients at risk of CS in this population.
• The validated ORBI score may aid in early risk stratification and timely intervention for STEMI patients at risk of cardiogenic shock.