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[Factors affecting parameters of left ventricular diastolic function derived from Doppler echocardiography]
D J Huang1, D N Zhang, Q X Yin
1Department of Internal Medicine, First University Hospital, West China University of Medical Sciences, Chengdu.
Zhonghua Nei Ke Za Zhi
|April 1, 1990
Summary
Left ventricular pressures significantly impact Doppler-derived diastolic function. The early-to-late diastolic mitral flow velocity (E/A) ratio may falsely normalize in advanced diastolic dysfunction.
Area of Science:
- Cardiology
- Echocardiography
- Physiology
Context:
- Left ventricular diastolic function assessment is crucial for diagnosing heart conditions.
- Doppler echocardiography provides key parameters for evaluating diastolic function.
- Understanding the influence of hemodynamic factors on these parameters is essential.
Purpose:
- To analyze how left ventricular diameter, systolic function, and filling pressures affect Doppler-derived diastolic function parameters.
- To clarify the significance of the early-to-late diastolic mitral flow velocity (E/A) ratio in different stages of diastolic dysfunction.
Summary:
- Left ventricular catheterization and echocardiography data from 36 patients revealed significant correlations.
- Left ventricular end-diastolic pressure, rapid filling wave pressure, and their ratio directly influence Doppler diastolic function parameters.
- A decreasing E/A ratio indicates early-stage diastolic dysfunction, while a normalized ratio in advanced stages can be misleading (false improvement).
Impact:
- Provides a deeper understanding of the hemodynamic influences on diastolic function assessment.
- Highlights the limitations of the E/A ratio as a sole indicator of diastolic dysfunction, especially in advanced stages.
- Informs clinical interpretation of Doppler echocardiography findings for more accurate diagnosis and management of heart failure with preserved ejection fraction.