Assessment of diagnostic value of XXXX testing in angina pectoris.

@entity1 @entity662 @entity63 @entity26 @entity4341 @entity3979 @entity158
In order to assess the diagnostic value of @entity4341 (D) testing, we studied the responses of 34 @entity1 with @entity662 and 10 normal subjects. Blood pressure and 12-lead ECG were recorded during and after intravenous infusion of 0.6 mg/kg @entity4341 for 10 minutes. Coronary arteriography and maximal or symptom-limited exercise tests were performed in the 34 @entity1 with @entity662 . During infusion 13 @entity1 presented @entity63 ST changes and 5 with @entity158 only. The latter group had normal coronary arteries. Among the 13 @entity1 with @entity63 ST changes, 7 had at least two critical @entity3979 and the remaining 6 had no coronary lesions. @entity4341 tests showed poor sensitivity (44%) and specificity (39%) with respect to coronary arteriography. The relatively high number of positive responses in subjects with normal coronary arteries indicates that the coronary steal phenomenon is not the sole cause of " @entity63 " response to the drug. Indirect indexes of myocardial @entity26 consumption were higher in @entity1 with a positive response to drug infusion than in those with a negative response; however the value of rate-pressure product at infusion end never reached that observed at @entity63 threshold during exercise testing in the same @entity1 . This suggests that neither can @entity26 consumption increase be considered as entirely responsible for @entity63 response to @entity4341 . In conclusion @entity4341 test cannot be proposed for predicting critical @entity3979 .
