Factors influencing the end-diastolic vortex assessed by using vector flow mapping.
Xiaoxia Zhang1, Jun Niu2, Ling Wu1
1Postgraduate Training Base of Jinzhou Medical University, PLA 967th Hospital, Dalian, China.
Echocardiography (Mount Kisco, N.Y.)
|August 9, 2019
Summary
Late diastolic vortex formation in the left ventricle (LV) is influenced by filling patterns and heart rate. Atrial contraction may enhance this vortex, improving diastolic-systolic coupling, especially in enlarged ventricles.
Area of Science:
- Cardiovascular Physiology
- Cardiac Imaging
- Hemodynamics
Background:
- The end-diastolic vortex plays a crucial role in left ventricular (LV) diastolic function.
- Understanding factors influencing vortex dynamics is key to assessing cardiac health.
Purpose of the Study:
- To investigate the determinants of the late diastolic vortex in normal and abnormal ventricles.
- To analyze the relationship between vortex characteristics and hemodynamic parameters.
Main Methods:
- Vector flow mapping analysis of Color Doppler data from the LV apical long-axis view.
- Study included 57 patients with coronary artery disease, 57 with dilated cardiomyopathy, and 53 healthy volunteers.
Main Results:
- In healthy individuals, vortex area and flux correlated with transmitral A velocity and heart rate.
- Transmitral A velocity and heart rate were independent predictors of vortex flux.
- LV size influenced vortex dynamics in patients with LV dysfunction and enlargement.
Conclusions:
- Late LV filling significantly impacts end-diastolic vortex formation.
- Compensatory atrial contraction can enhance the end-diastolic vortex, aiding diastolic-systolic coupling.
- LV size is a critical factor affecting the end-diastolic vortex in pathological conditions.
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