Related Experiment Videos
Right ventricular performance and left ventricular assist device filling
W A Mandarino1, S Winowich, J Gorcsan
1Division of Cardiothoracic Surgery, University of Pittsburgh, Pennsylvania, USA.
The Annals of Thoracic Surgery
|April 1, 1997
Summary
Right ventricular (RV) function significantly impacts left ventricular assist device (LVAD) filling. RV ejection metrics closely correlate with LVAD filling rates, demonstrating a predictable relationship for improved patient management.
Area of Science:
- Cardiology
- Cardiovascular Surgery
- Biomedical Engineering
Background:
- Right ventricular (RV) function is a critical factor influencing left ventricular assist device (LVAD) performance.
- Understanding the RV-LVAD interaction is crucial for optimizing device support and patient outcomes.
Purpose of the Study:
- To investigate and demonstrate the relationship between right ventricular ejection dynamics and left ventricular assist device filling.
- To quantify the correlation between RV function parameters and LVAD filling rates in patients.
Main Methods:
- Simultaneous recording of RV pressure-area loops and LVAD volume in 10 LVAD patients.
- Utilized transesophageal echocardiography and high-fidelity RV pressure measurements.
- Calculated RV ejection phase indices (stroke area, peak ejection rate, stroke work) and LVAD filling rates.
Main Results:
- Strong positive correlations were observed between RV stroke area, peak ejection rate, and stroke work with LVAD peak filling rate (r values ranging from 0.83 to 0.87).
- Baseline LVAD mean filling rate correlated with RV stroke work (r=0.77).
- Group-level LVAD peak filling rate showed correlation with RV peak ejection rate (r=0.75).
Conclusions:
- The study confirms predictable associations between right ventricular ejection and left ventricular assist device filling.
- These findings highlight the importance of RV function assessment in LVAD management.