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[Quantitative characterization of vortex flow in patients with early myocardial ischemia by echocardiography using
Insights
Vector Flow Mapping (VFM) can assess left ventricular vorticity. The vortex relative strength index is a potential new diagnostic marker for early myocardial ischemia.
Area of Science:
- Cardiology
- Medical Imaging
- Biomedical Engineering
Background:
- Early myocardial ischemia detection is crucial for timely intervention.
- Conventional echocardiography has limitations in quantifying intracardiac flow dynamics.
Purpose of the Study:
- To quantitatively characterize left ventricular vortex flow in early myocardial ischemia using Vector Flow Mapping (VFM).
- To explore the potential of VFM-derived parameters as a novel diagnostic index for early myocardial ischemia.
Main Methods:
- 105 patients with suspected angina underwent conventional ultrasound and VFM.
- VFM estimated velocity vectors and vorticity.
- Vortex parameters, including vortex relative strength index, were measured and compared between controls (n=49) and early ischemia (n=56) groups.
Main Results:
- No significant differences in vortex flow, radius, diameter, or area were observed between groups (P>0.05).
- Vortex relative strength index was significantly lower in the early myocardial ischemia group (20.20±6.29) compared to controls (23.68±11.66, P<0.05).
Conclusions:
- VFM is a feasible technique for evaluating left ventricular vorticity in healthy individuals and patients with early myocardial ischemia.
- The vortex relative strength index shows promise as a novel index for diagnosing early myocardial ischemia.
Objective:
To quantitatively characterize vortex flow in patients with early myocardial ischemia by echocardiography using vector flow mapping (VFM) and explore a new diagnostic index of early myocardial ischemia.
Methods:
This study was conducted among 105 patients with suspected angina pectoris, who were free of a previous cardiac history with a normal ejection fraction. Patients without significant coronary artery stenoses constituted the control group (n=49) and those with significant coronary artery stenoses (n=56) constituted the early myocardial ischemia group. All the patients underwent conventional ultrasonic inspection and VFM. The velocity vector and vorticity were estimated by VFM. The vortex parameters including vortex flow, radius, diameter, area and vortex relative strength index were measured.
Results:
No significant differences were found in the vortex parameters including the vortex flow, radius, diameter or area between the two groups (P>0.05), but vortex relative strength index was significantly lower in early myocardial ischemia group (23.68∓11.66 vs 20.20∓6.29, P<0.05).
Conclusion:
VFM is feasible for quantitative evaluation of left ventricular vorticity in healthy individuals and patients with early myocardial ischemia, and the vortex relative strength index may serve as a novel index for the diagnosis of early myocardial ischemia.
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