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The relationship between systolic vector flow mapping parameters and left ventricular cardiac function in healthy
Seijirow Goya1, Tomoki Wada2, Kazumi Shimada2
1Department of Veterinary Surgery, Faculty of Veterinary Medicine, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo, 183-8509, Japan. goya@vet.ne.jp.
Heart and Vessels
|December 13, 2017
Summary
Vector flow mapping (VFM) reveals new insights into cardiac function. This novel echocardiography technology shows blood flow dynamics, correlating VFM parameters with left ventricular contractility and providing new hydrokinetic indices.
Area of Science:
- Cardiology
- Biomedical Engineering
- Hemodynamics
Background:
- Vector flow mapping (VFM) is an advanced echocardiographic technique.
- It visualizes blood flow vectors and vortices, enabling hydrokinetic evaluation of left ventricular hemodynamics.
- VFM offers unique parameters like circulation, vorticity, vortex area, and energy loss.
Purpose of the Study:
- To investigate the relationship between VFM parameters and cardiac function.
- To assess how dobutamine administration affects VFM parameters and cardiac performance in Beagle dogs.
Main Methods:
- Five healthy Beagle dogs were studied under varying dobutamine infusions.
- Cardiac function was assessed using pressure-volume loops via a conductance catheter.
- Systolic VFM parameters (circulation, vorticity, vortex area, energy loss) were measured.
Main Results:
- Dobutamine increased systolic maximum circulation, vorticity, vortex area, and energy loss.
- Strong correlations were found between VFM parameters and ejection fraction, dP/dt max, and end-systolic LV elastance.
- Systolic energy loss correlated significantly with systolic vorticity and maximum circulation.
Conclusions:
- Systolic VFM parameters are associated with left ventricular contractility.
- VFM provides novel hydrokinetic indices that reflect cardiac function.
- Systolic energy loss is influenced by systolic vortex dynamics.
