| Literature DB >> 1549999 |
G V Heller1, I Ahmed, P L Tilkemeier, M M Barbour, C E Garber.
Abstract
The effects of two levels of exercise intensity on the size and location of thallium-201 defects were compared in 22 patients with known ischemic coronary artery disease. A symptom-limited incremental exercise test was performed followed (greater than 48 hours) by submaximal steady-state exercise at 70% of the peak heart rate achieved during the incremental test. Planar thallium-201 myocardial scans obtained after each protocol were analyzed by means of both visual qualitative and computerized quantitative methods. After incremental exercise all patients exhibited reversible thallium-201 defects, and submaximal exercise still resulted in reversible defects in 20 (91%) patients. However, the size of the ischemic area and the degree of ischemia were significantly reduced by both qualitative and quantitative criteria after submaximal exercise. Therefore interpretation of thallium-201 scans with regard to severity of disease and prognosis should take into account exercise intensity.Entities:
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Year: 1992 PMID： 1549999 DOI： 10.1016/0002-8703(92)90695-r
Source DB: PubMed Journal: Am Heart J ISSN： 0002-8703 Impact factor: 4.749