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Role of oral dipyridamole echocardiography test (DET) was evaluated in 50 patients with effort angina. All patients underwent coronary angiography, the day after oral DET. The echo studies were performed at rest and 65 +/- 15 minutes after 300 mg of oral dipyridamole. Segmental wall motion was analysed in a 16 segment model and a wall motion score index (WMSI) was generated for the entire left ventricle both at rest and following the drug. WMSI was significantly higher after oral dipyridamole, (p < 0.001) compared to resting condition with increased sensitivity (86% vs 74%). When results of DET were compared with coronary angiography, the correlation of WMSI was statistically significant in three vessel disease (p < 0.001), two vessel disease (p < 0.001) as well as for left anterior descending lesions (p < 0.001). However, it was insignificant for single vessel disease, viz, right coronary artery and circumflex artery. Thus we conclude that oral DET is a safe, inexpensive, sensitive and non-exercise dependent method for demonstrating myocardial ischaemia with high diagnostic accuracy.
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