479 ECHOCARDIOGRAPHIC ESTIMQTION OF CQRDIQC POWER IN CARDIOGENIC SHOCK: CORRELATION WITH INVASIVE HEMODYNAMICS AND PROGNOSTIC IMPLICATIONS.


 
 
 Cardiac power output (CPO) is currently used for cardiogenic shock patient's evaluation including shock phenotyping, mechanical circulatory support selection and weaning algorithms. Despite its remarkable prognostic role, CPO use is limited by the need for a Swan-Ganz catheter. Aim of this study was to evaluate the feasibility and accuracy of echocardiographic estimation of CPO compared to RHC-derived measurement. We also aimed to investigate the prognostic role of non-invasive CPO in the specific setting of cardiogenic shock.
 
 
 
 We performed blinded echocardiography in all consecutive heart failure (HF) patients undergoing RHC as a part of their evaluation at Cardiology Department of Città della Salute e della Scienza University hospital in Turin. Echocardiographic CPO was calculated as: (cardiac output * mean arterial pressure)/451. eCPO was subsequently assessed in 80 patients admitted for cardiogenic shock in cardiac ICU of centers participating at the Altshock registry during the first 24 hours from shock onset. Primary endpoint was in-hospital MACE (death, heart transplantation or LVAD implantation during the index hospitalization).
 
 
 
 103 HF patients (57.6 ± 11.3 years, 63% males, median left ventricle ejection fraction 25% [IQR 20-51%]) were included in the derivation cohort. Mean invasive CPO was 0.72 ± 0.27 W, while eCPO was 0.74 ± 0.27 W. eCPO showed a good correlation with invasive CPO (Pearson r: 0.96, p<0.001). In the Altshock registry cohort (80 patients, 81% males, mean age 62.5 ± 14.4 years, in-hospital mortality 31.4%) eCPO <0.6 (HR 2,48 [95% CI 1,06 - 5,85], p=0,04), hemoglobin (p=0.005), systolic blood pressure (p=0.05) and SCAI class (p=0.02) were associated with increased risk of in-hospital MACE at univariate analysis. Echocardiographic CPO <0.6 remained significantly associated with MACE also after adjustment at multivariate Cox analysis (HR 2,87 [95% CI 1,03 - 7,96] p=0,043).
 
 
 
 Echocardiographic estimation of CPO (eCPO) is feasible and showed a good agreement with invasive CPO. Reduced eCPO during the first 24 hours was associated with increased in-hospital MACE in cardiogenic shock patients.
