[Exertion isotope tests in coronary insufficiency. Comparison with isotopic ventriculography and XXXX ].

@entity1 @entity296 @entity66 @entity850 @entity2791 @entity3979 @entity3980 @entity453 @entity67
Very few studies have been described comparing the value of exercise @entity296 and left @entity67 . The authors designed a study comparing these two investigations with conventional exercise stress testing and coronary angiography. The isotopic investigations were carried out within 48 hours of coronary angiography. A total of 143 @entity1 undergoing coronary angiography (35 normal, 108 coronary @entity1 : 36 single vessel, 36 double vessel and 36 @entity66 ) were included in this study. The lesions were located of the @entity3980 (77 cases), left circumflex (77 cases) and right coronary arteries (62). The sensitivity and specificity of both radionuclide investigations were evaluated to assess their diagnostic value; the best results were obtained with @entity296 (sensitivity 86 p. 100; specificity 100 p. 100); angioscintigraphy had a sensitivity of 71 p. 100 and specificity of 97 p. 100, and conventional exercise stress testing of 42 p. 100 and 70 p. 100 respectively. The sensitivity seemed to increase with the degree of @entity850 ; although the sensitivity of @entity296 increased progressively, that of angioscintigraphy doubled in cases of @entity850 90 p. 100 ( @entity850 less than 90 p. 100, sensitivity = 37 p. 100; @entity850 greater than 90 p. 100, sensitivity = 73 p. 100). The sensitivity of @entity296 with respect to the severity of the @entity453 was best in cases of @entity3979 (sensitivity in cases of RCA @entity850 = 74 p. 100; sensitivity in @entity3980 @entity850 = 58 p. 100; sensitivity in left circumflex @entity850 = 43 p. 100). The sensitivity of left @entity67 was @entity3980 (RCA @entity850 = 50 p. 100, @entity3980 @entity850 = 64 p. 100, left circumflex @entity850 = 36 p. 100). The sensitivity of both investigations was poor in left circumflex @entity2791 even when severely diseased. The sensitivity of both investigations was better in diffuse @entity453 : @entity296 ( @entity66 : 72 p. 100, @entity66 : 92 p. 100, @entity66 : 94 p. 100), left @entity67 (61 p. 100, 69 p. 100, and 83 p. 100 respectively). Although the association of these two radioisotopic investigations does not improve diagnostic sensitivity, it does provide more information about the localisation and extension of the @entity453 especially in @entity3980 and @entity3979 . These results suggest that these investigations are complementary in the evaluation of @entity1 with @entity453 .(ABSTRACT TRUNCATED AT 400 WORDS)
