الفهرس يوجد فقط 14 صفحة متاحة للعرض العام
 |  | from | 88 |  |  |
| | | from | 88 | | |
المستخلص
The performance of the RV determines exercise capacity and confers prognostic information in different cardiopulmonary diseases. To allow optimal patient management, ideal methods to assess RV function are therefore important. Patients with inferior MI who have RVI involvement appear to have a worse prognosis with increased mortality than those who do not have RV involvement. Since there is a difficulty in the assessment of RV function by 2D echocardiography, a noninvasive, practical, bedside and cost effective method is desirable. Tissue Doppler technique enables to visualize systolic and diastolic velocities of the tissue through sample volume replacement.
This study aimed at the assessment of the value of PW-TDI for the assessment of right ventricular function and evaluation of the TDI in the assessment of RVI
This study included 35 patients and 10 control subjects. The subjects were classified into 4 groups. The first group consisted of 15 patients with the diagnosis of ST elevation anterior MI. The second group consisted of 10 patients with the diagnosis of ST elevation inferior MI without evidence of RVI. The third group consisted of 10 patients with the diagnosis of ST elevation inferior MI with the evidence of RVI. While the fourth group was the control group: which consisted of 10 healthy individuals with no evidence of coronary artery disease, pulmonary disease, diabetes mellitus, hypertension or any cardiac diseases.
All the subjects were subjected to routine ECG, chest X-ray, conventional echocardiography, routine laboratory investigations and TDI. TDI was performed in 7 different segments of the heart with measurement of TDI velocities and intervals in these segments.
A cutoff value of 11.1 cm/s tricuspid annular peak systolic (S wave) velocity yielded an area under the curve of 93% (P < 0.001) for differentiation between patients with and those without RVI respectively and right ventricular myocardial infarction could be identified with a sensitivity of 98% and a specificity of 90%. Also the mid and basal segments of the RV free wall S wave gave nearly the same result. Therefore the S wave velocity of the tricuspid annulus could be used as a sensitive tool to diagnose RVI. Thus we can rely on the tricuspid annular peak systolic (S wave) to exclude RVI.