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Early temporary mechanical circulatory support for cardiogenic shock: real-life data from a regional cardiac assistance network.
Journal of Heart and Lung Transplantation 2024 Februrary 16
BACKGROUND: Temporary mechanical circulatory support as well as multidisciplinary team approach in a regional care organization might improve survival of cardiogenic shock. No study has evaluated the relative effect of each temporary mechanical circulatory support on mortality in the context of a regional network.
METHODS: Prospective observational data were retrieved from patients consecutively admitted with cardiogenic shock to the intensive care units in 3 centres organized into a regional cardiac assistance network. Temporary mechanical circulatory support indication was decided by a heart team, based on the initial shock severity or if shock was refractory to medical treatment within 24 hours of admission. A propensity score for circulatory support use was used as an adjustment co-variable to emulate a target trial. The primary endpoint was in-hospital mortality.
RESULTS: 246 patients were included in the study (median age: 59.5 years, 71.9% male): 121 received early mechanical assistance. The main etiologies were acute myocardial infraction (46.8%) and decompensated heart failure (27.2%). Patients who received early mechanical assistance had more severe conditions than other patients. Their crude in-hospital mortality was 38% and 22.4% in other patients but adjusted in-hospital mortality was not different (hazard ratio 0.91, 95%CI:0.65-1.26). Patients with mechanical assistance had a higher rate of complications than others with longer ICU and hospital stays.
CONCLUSIONS: In the conditions of a cardiac assistance regional network, in-hospital mortality was not improved by early mechanical assistance implantation. A high incidence of complications of temporary mechanical circulatory support may have jeopardized its potential benefit.
METHODS: Prospective observational data were retrieved from patients consecutively admitted with cardiogenic shock to the intensive care units in 3 centres organized into a regional cardiac assistance network. Temporary mechanical circulatory support indication was decided by a heart team, based on the initial shock severity or if shock was refractory to medical treatment within 24 hours of admission. A propensity score for circulatory support use was used as an adjustment co-variable to emulate a target trial. The primary endpoint was in-hospital mortality.
RESULTS: 246 patients were included in the study (median age: 59.5 years, 71.9% male): 121 received early mechanical assistance. The main etiologies were acute myocardial infraction (46.8%) and decompensated heart failure (27.2%). Patients who received early mechanical assistance had more severe conditions than other patients. Their crude in-hospital mortality was 38% and 22.4% in other patients but adjusted in-hospital mortality was not different (hazard ratio 0.91, 95%CI:0.65-1.26). Patients with mechanical assistance had a higher rate of complications than others with longer ICU and hospital stays.
CONCLUSIONS: In the conditions of a cardiac assistance regional network, in-hospital mortality was not improved by early mechanical assistance implantation. A high incidence of complications of temporary mechanical circulatory support may have jeopardized its potential benefit.
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