| Autor: |
Madariaga, I., Ansa, I., Ancin, R., de la Fuente, A., Sánchez, R., Fernández, J.L., Moriones, I. |
| Předmět: |
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| Zdroj: |
Echocardiography; Jan2004, Vol. 21 Issue 1, p104-104, 1p |
| Abstrakt: |
Purpose: Postoperative measurement of graft permeability by angiography is invasive. The aim of this study is to evaluate the utility of transthoracic echo-Doppler (TTE) in measuring LIMA graft permeability. Methods: We studied 89 consecutive patients (average age 65 years, range 37–79 years) who were revascularized with a LIMA. Graft permeability was evaluated by both color- and pulsed-Doppler TTE. We measured the following parameters: systolic velocity peak (SVP), diastolic velocity peak (DVP), average velocity, pulsatility index (PI), resistivity index (RI). Of the 89 patients, 60 also underwent angiography. We considered stenosis to be severe if greater than 70% as indicated by angiography. Results: We were able to obtain TTE data for 85 patients (95.5%) and of these 57 had angiography as well. Doppler registers were biphasic, with both systolic and diastolic components. In patients with grafts functioning normally, registers were predominantly diastolic. When the graft was dysfunctional registers were predominantly systolic (similar to the register of the mammary artery in its anatomic position). Patients with dysfunctional grafts had higher SVP (p < 0.01), higher DVP (p < 0.05), and higher PI (p < 0.001). The sensitivity and specificity of TTE in the detection of severe graft dysfunction were 86% and 100%, respectively. The positive prediction value was 100%. Conclusions: TTE has high sensitivity, specificity, and predictive value in determination of LIMA graft permeability. Being noninvasive, TTE is ideal for the follow-up of patients with LIMA grafts. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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