Sex-Related Differences in Patient Characteristics, Hemodynamics, and Outcomes of Cardiogenic Shock: INOVA-SHOCK Registry.

Background: Little is known about sex-related differences in outcomes of patients with cardiogenic shock (CS) treated within a standardized team-based approach (STBA).

Methods: We evaluated 520 consecutive patients (151 women and 369 men) with CS due to acute myocardial infarction (AMI) and heart failure (HF) in a single-center registry (January 2017-December 2019) and examined outcomes according to sex and CS phenotype. The primary outcome was in-hospital mortality. Secondary outcomes included major adverse cardiac events, 30-day mortality, major bleeding, vascular complications, and stroke.

Results: Women with AMI-CS had higher baseline acuity (CardShock score: female [F]: 5.5 vs male [M]: 4.0; = .04). Women with HF-CS more often presented with cardiac arrest (F: 12.4% vs M: 2.4%; < .01) and had higher rates of vasopressor use (F: 70.8% vs M: 58.0%; = .04) and mechanical circulatory support (F: 46.1% vs M: 32.5%; = .04). There were no sex-related differences in in-hospital mortality for AMI-CS (F: 45.2% vs M: 36.9%; = .28) and HF-CS (F: 28.1% vs M: 24.5%; = .56). Women with HF-CS experienced higher rates of major bleeding (F: 25.8% vs M: 13.7%; = .02) and vascular complications (F: 15.7% vs M: 6.1%; = .01). However, female sex was not an independent predictor of these complications. No sex differences in survival were noted at 1 year.

Conclusions: Within an STBA, although women with AMI-CS and HF-CS presented with higher acuity, they experienced similar in-hospital mortality, major adverse cardiac events, 30-day mortality, stroke, and 30-day readmissions as men. Further research is needed to better understand the extent to which historical differences in CS outcomes can be mitigated by an STBA.