Impella support in cardiogenic shock significantly increased cardiac output (p=0.048) and improved LV unloading, while IABP showed only modest hemodynamic benefits.
How do different mechanical circulatory support strategies affect ventricular loading and hemodynamics as assessed by a novel semi-invasive PV loop method in patients with cardiogenic shock?
A novel semi-invasive method for deriving PV loops using PAC and echocardiography demonstrates that Impella provides substantial LV unloading in cardiogenic shock, whereas IABP offers modest improvements.
Absolute Event Rate: 0% vs 0%
Abstract Background The optimal mechanical circulatory support (MCS) strategy for cardiogenic shock (CS) remains debated, particularly in acute myocardial infarction-related CS (AMI-CS) and heart failure-related CS (HF-CS). Traditional assessments may not fully capture ventricular loading, limiting the understanding of MCS effects. Purpose we introduce a novel method to derive PV loops using PAC 0.05). After device removal, CO increased further (p=0.037), and PV loops demonstrated improved systolic function. PCWP remained lower than baseline (p=0.044), and arterial elastance (Ea) improved, suggesting a mild enhancement in VA interaction. EDV and ESV showed moderate increases, reflecting LV reloading. No-Support (AMI-CS): CO increased (p=0.03), reflecting partial hemodynamic recovery. However, PV loops showed no changes (p0.05), indicating persistent LV dysfunction and suboptimal VAC (p=0.121). Only stroke work displayed a trend of improvement (P=0.054). HF-CS: PCWP (p=0.042) and RAP (p=0.014) decreased. PAPI and the RAP/PCWP improved (p=0.038). However, no significant changes were observed in PV loops, indicating that LV performance remained unchanged despite improved RV function and reduced congestion. Conclusions This study presents a novel methodology for deriving PV loops. Impella support demonstrated substantial LV unloading, while IABP provided only modest improvements. In HF-CS, decongestion was the primary benefit, with improvements in the RV function. PV loops optimization varies by MCS strategy.Fig1.PV-loop creation & PV-loops in MCS Fig2.Boxplot MCS strategies comparison
Ortega-Hernandez et al. (Sat,) reported a other. Impella support in cardiogenic shock significantly increased cardiac output (p=0.048) and improved LV unloading, while IABP showed only modest hemodynamic benefits.