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[Evaluating wall motion of dilated cardiomyopathy by pulsed-wave Doppler tissue imaging]
1Department of Internal Medicine, First Affiliated Hospital, WCUMS, Chengdu 610041, China.
Insights
Doppler tissue imaging (DTI) reveals abnormal myocardial velocities and reduced myocardial velocity gradients in dilated cardiomyopathy (DCM) patients, offering quantitative insights into cardiac dysfunction.
Area of Science:
- Cardiology
- Medical Imaging
- Biomedical Engineering
Background:
- Dilated cardiomyopathy (DCM) is a significant cause of heart failure.
- Assessing cardiac wall motion is crucial for diagnosing and managing DCM.
- Doppler tissue imaging (DTI) offers a non-invasive method to evaluate myocardial function.
Purpose of the Study:
- To characterize wall motion abnormalities in DCM using Doppler tissue imaging (DTI).
- To quantitatively assess myocardial velocities (MV) and myocardial velocity gradients (MVG) in DCM patients.
Main Methods:
- A study involving 30 DCM patients and 30 healthy volunteers.
- Myocardial velocities (MV) and transmural myocardial velocity gradients (MVG) were recorded using DTI.
- Assessment included both short axis and long axis myocardial motion evaluation.
Main Results:
- DCM patients exhibited significantly lower myocardial velocities (MV) compared to controls, particularly in long axis motion.
- A significant decrease in myocardial velocity gradients (MVG) was observed in DCM patients (P < 0.05).
- The heterogeneity of wall motion, often seen in DCM, was found to be diminished in the patient group.
Conclusions:
- Pulsed-wave Doppler tissue imaging (PW-DTI) can quantitatively evaluate DCM-related abnormalities.
- PW-DTI provides valuable supplementary information for clinical diagnosis and management of DCM.
- This imaging technique aids in understanding the complex wall motion characteristics in dilated cardiomyopathy.
Objective:
To evaluate the characteristics of wall motion in cases of dilated cardiomyopathy (DCM) by the use of Doppler tissue imaging (DTI).
Methods:
We observed 30 DCM patients and 30 normal volunteers. For the assessment of short axis motion, the myocardial velocities (MV) and transmural myocardial velocity gradients (MVG) of the middle segments of anterior interventricular septum and left ventricular posterior wall were recorded through parasternal long axis view. We detected the MV of the middle segments of left ventricular walls to evaluate the long axis motion through apical windows(4-chamber, 2-chamber and long axis).
Results:
Four kinds of abnormal presentations of the waves were seen in DCM cases. The patients' MV of were obviously lower as compared with the controls', especially in long axis; the patients' MVG also decreased significantly (P < 0.05). In the patient group, the heterogeneity of wall motion disappeared too.
Conclusion:
PW-DTI can quantitatively assess the above abnormalities of DCM and provide supplementary information for clinical use.