PURPOSE: The authors sought to determine if the @entity4266 ( @entity4266 ), as measured by xenon ventriculography, is depressed in @entity1 with @entity1151 . The authors also sought to correlate any decrement in @entity4266 with the extent of lung perfusion defects. MATERIALS AND METHODS: The authors identified all @entity1 who had lung ventilation-perfusion (V/Q) scans between January 1994 and December 1996, that were interpreted as high probability for @entity1151 . From these @entity1 , the authors selected those who had undergone concurrent xenon ventriculography (XV) (n = 23), and then reprocessed the initial ventriculography data for confirmation. The authors also reviewed original V/Q scans, chest radiographs, and clinical data. A control group was drawn from @entity1 with normal V/Q scans who had undergone XV. RESULTS: Fifteen @entity1 (65%) with high probability V/Q scans had an abnormally low @entity4266 (< .32). @entity1 with high probability V/Q scans also had a significantly lower mean @entity4266 (0.28 +/- .08) than @entity1 with normal V/Q scans (.39 +/- .08 SD). The degree of @entity4266 decline correlated poorly with the number of segmental perfusion defects (r = -.39). CONCLUSIONS: @entity4266 is often depressed in @entity1 with high probability V/Q scans. XV can identify these @entity1 , while routine lung V/Q scans cannot.

XXXX and associated right heart dysfunction by combining ventilation perfusion lung scanning and xenon ventriculography.

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients'] @entity4266 :: ('MESH:D018497', 'Disease') :: ['right ventricular ejection fraction', 'RVEF'] @entity1151 :: ('MESH:D011655', 'Disease') :: ['pulmonary emboli', 'pulmonary embolism']
@entity1151 :: (MESH:D011655,Disease) :: ['Detection of pulmonary emboli']
