The role of ambulatory ST-segment monitoring in the diagnosis of XXXX : comparison with exercise testing and thallium scintigraphy.

@entity1 @entity662 @entity583 @entity66 @entity3361 @entity2473 @entity453
The value of ambulatory ST-segment monitoring in the detection of underlying @entity453 was investigated in one hundred consecutive @entity1 who underwent exercise testing and coronary arteriography for @entity662 . Forty-seven also had thallium-201 radioisotope imaging performed. Six of the 26 @entity1 with normal coronary arteries and 52 of the 74 @entity1 with significant @entity453 had ST-segment changes during 48 h of ambulatory monitoring (sensitivity 77%). In comparison, the sensitivity of conventional exercise testing was 73% and specificity was 81%. Previous @entity583 did not influence the results, but @entity1 with poor left ventricular function more often had absence of ambulatory ST-segment changes. @entity453 was detected more efficiently (sensitivity 80%), compared with @entity66 (sensitivity 50%). Thallium scintigraphy demonstrated defects of uptake in nine @entity1 without ambulatory ST-segment changes (sensitivity 82%, specificity 71%). The majority of these @entity1 had small inferior or posterior defects in thallium uptake. Only one @entity1 with ambulatory ST-segment changes had normal coronary arteries and demonstrable @entity2473 . Thus, ambulatory ST-segment monitoring is as valuable as stress testing in the detection of @entity453 and in addition helps detect @entity1 with @entity3361 and normal coronary arteries.
