Related Experiment Video
Updated: Jun 22, 2026
Early Detection of Drug-Induced Renal Hemodynamic Dysfunction Using Sonographic Technology in Rats
Published on: March 11, 2016
[Doppler tissue imaging contribution in the study of diastolic dysfunction in hemodialysis patients]
Ali Ben Khalfallah1, Islem Sanaa, S Mokrani
1Service De Cardiologie, Hopital De Menzel Bourguiba.
Insights
Doppler tissue imaging (DTI) accurately characterizes diastolic dysfunction in hemodialysis patients, identifying key parameters like E/A and Ea/Aa for precise diagnosis and assessment of left ventricular filling pressures.
Area of Science:
- Cardiology
- Nephrology
- Medical Imaging
Background:
- Doppler echocardiography is the primary method for diagnosing and staging diastolic dysfunction.
- Understanding diastolic function is crucial, especially in patient populations like those undergoing hemodialysis.
Purpose of the Study:
- To evaluate the contribution of Doppler tissue imaging (DTI) in assessing diastolic function.
- To identify echocardiographic parameters with the highest discriminating power for diastolic dysfunction in hemodialysis patients.
Main Methods:
- Conventional Doppler echocardiography parameters (transmitral flow, flow propagation velocity, pulmonary venous flow) were assessed.
- Annulus Doppler Tissue Imaging (DTI) parameters (Ea/Aa, wave durations) were measured.
- Combined indexes and discriminating analysis were employed to identify significant parameters.
Main Results:
- Left ventricular diastolic dysfunction was prevalent (88%) in hemodialysis patients.
- Specific parameters like Vp, TRIV, S/D, FS, Ea/Aa, and E/A showed significant discriminating power (p < 0.0001).
- A combination of Ea/Aa, FS, and Vp or E/Vp achieved 100% classification accuracy for pseudo-normal patterns.
Conclusions:
- DTI is valuable for characterizing stage II diastolic dysfunction.
- DTI, combined with pulmonary venous flow and other indexes, enables accurate assessment of left ventricular filling pressures.
Background:
Doppler echocardiography is currently the main tool permitting the diagnosis and the characterization of the stages of diastolic dysfunction.
Aim:
The purpose of this study is to precise the contribution of Doppler tissue imaging in the study of diastolic function and to identify the parameters having the most discriminating power of diastolic dysfunction in hemodialysis patients.
Methods:
Conventional Doppler echocardiography study implies left ventricular diastolic function from: Doppler transmitral flow (E/A, isovolumic relaxation time (TRIV), deceleration of mitral E-wave time (TDE), duration of A wave), color M-mode flow propagation velocity (Vp); The study of pulmonary venous flow (S/D, Systolic fraction (FS) and duration of pulmonary venous A wave); The annulus Doppler Tissue Imaging (Ea/Aa, E and A waves durations, VTI of E and A); and finally combined indexes (ratio of peak E-wave velocity to Vp (E/Vp), difference in duration between pulmonary venous and mitral flow A wave (Ap-Am) and ratio of peak mitral and annulus E-wave velocities (E/Ea).
Results:
Left ventricular diastolic dysfunction is found in 88% of the 50 haemodialysis patients: abnormal relaxation pattern 56%, pseudo-normal pattern 28% and restrictive pattern 4%. The parameter Vp discriminates normal patterns. The parameters TRIV, S/D and FS characterise abnormal relaxation. Ea/Aa ratio characterises pseudo-normal pattern and E/A ratio restrictive pattern. Discriminating analysis allows a correct classification of 100% of pseudo-normal pattern patients with 3 variables: Ea/Aa, FS and Vp or E/Vp. Doppler parameters which discriminating power is significant (p < 0.0001) are, in decreasing order: E/A, Ea/Aa, TRIV, Vp, FS, S/D, E/Vp and TDE.
Conclusion:
DTI contributes mainly in the characterization of stage II diastolic dysfunction patients and allows in association with pulmonary venous flow parameters (Ap-Am) and combined indexes (E/Vp et E/Ea) an accurate appreciation of left ventricular filling pressures.
Related Concept Videos
01:19Assessing Blood pressure using a doppler ultrasound
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:
01:30Equipments Used To Measure Blood Pressure
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...