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Assessment of Left-Sided Hemodynamics With Exercise in Patients With Continuous Flow Left Ventricular Assist Device
Sara S Inglis1,2, Sarah D Schettle3, Mauricio A Villavicencio3
1Deparment of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota, USA.
Artificial Organs
|March 13, 2025
Summary
Left heart catheterization (LHC) with exercise reveals improved left ventricular (LV) systolic and diastolic responses in patients with LVAD support. Understanding LV-LVAD interactions can enhance exercise tolerance through speed modulation.
Area of Science:
- Cardiology
- Medical Devices
- Exercise Physiology
Background:
- Left ventricular assist devices (LVADs) support patients with advanced heart failure.
- Assessing cardiac response to exercise in LVAD patients is crucial for management.
- Left heart catheterization (LHC) provides detailed hemodynamic data during activity.
Purpose of the Study:
- To evaluate left ventricular (LV) systolic and diastolic responses to exercise in LVAD patients.
- To compare these responses between patients undergoing hemodynamic optimization versus those considered for device weaning.
- To explore the relationship between LV-LVAD interaction and exercise capacity.
Main Methods:
- Retrospective review of adult patients undergoing LHC with exercise (June 2017-June 2023).
- Patients divided into hemodynamic optimization (Optim) and weaning consideration (Wean) cohorts.
- Analysis of LV systolic and diastolic parameters, including LV systolic work index (LVSWI) and LV end-diastolic pressure (LVEDP).
Main Results:
- Eight patients included (88% male, median age 57).
- The Wean cohort showed a more rapid increase in LVSWI over exercise levels compared to the Optim cohort (p=0.044).
- LVSWI rose more quickly at lower LVEDP in the Wean group (p=0.0026), with a trend towards higher pulse power index.
Conclusions:
- Patients with favorable remodeling on LVAD support demonstrate enhanced LV systolic and diastolic responses to exercise.
- Higher systemic pulsatility was observed in these patients.
- Further understanding of LV-LVAD interactions during activity may guide strategies for improving exercise tolerance via LVAD speed modulation.
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