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Echocardiographic particle image velocimetry for the evaluation of diastolic function in hypertrophic nonobstructive
Christian Prinz1, Roman Lehmann, Douglas Brandao da Silva
1Department of Cardiology, Heart and Diabetes Center NRW, Ruhr-University, Bochum, Bad Oeynhausen, Germany.
Insights
Particle image velocimetry (PIV) echocardiography revealed disturbed intraventricular flow and reduced pressure differences in patients with hypertrophic nonobstructive cardiomyopathy and diastolic dysfunction, indicating impaired suction.
Area of Science:
- Cardiology
- Medical Imaging
- Fluid Dynamics
Background:
- Diastolic dysfunction (DD) is a key feature in hypertrophic nonobstructive cardiomyopathy (HNCM).
- Accurate, non-invasive assessment of DD in HNCM remains challenging.
Purpose of the Study:
- To evaluate the utility of particle image velocimetry (PIV) echocardiography for assessing diastolic dysfunction in patients with HNCM.
- To correlate PIV-derived parameters with DD severity and invasive measurements.
Main Methods:
- A study involving 30 HNCM patients with DD and 20 healthy controls.
- All subjects underwent clinical assessment, exercise testing, and standard echocardiography.
- Particle image velocimetry (PIV) echocardiography was performed to analyze intraventricular flow patterns and pressure differences.
Main Results:
- Higher energy dissipation was observed in DD patients compared to controls.
- PIV parameters showed a strong correlation with the severity of DD and invasive measurements of left ventricular end-diastolic pressure.
- Good inter-observer variability was achieved for PIV measurements.
Conclusions:
- PIV echocardiography is feasible for detailed analysis of intraventricular vortex flow in DD.
- Patients with HNCM and DD exhibit disturbed intraventricular flow and reduced pressure gradients, suggesting impaired suction.
- Further research on PIV echocardiography in various cardiac conditions is recommended.
Aims:
To use particle image velocimetry (PIV) echocardiography for the evaluation of diastolic dysfunction (DD) in patients with hypertrophic nonobstructive cardiomyopathy (HNCM).
Methods:
This study included 50 individuals, thereof 30 patients with DD due to HNCM and 20 healthy individuals who served as controls. HNCM patients were divided into 3 groups according to DD severity. All subjects underwent clinical assessment, exercise testing, and standard as well as PIV echocardiography.
Results:
Energy dissipation was higher in DD patients than in the control group. The severity of flow pattern disturbance corresponded to the degree of DD. In a subgroup of 20 HNCM patients we found significant correlations between invasive measured left ventricular end-diastolic pressure and noninvasive PIV parameters for intraventricular pressure differences and filling. Inter-observer variability (mean difference ± 1.96 SD) for all tested PIV measurements was good.
Conclusion:
According to DD severity, patients with HNCM have disturbed intraventricular flow and reduced intraventricular pressure differences, consistent with a reduced intraventricular suction. PIV echocardiography appears to be feasible for detailed analysis of ventricular vortex flow in DD conditions. Further research using PIV echocardiography in different cardiac pathologies seems warranted.
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