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- Title
Effects of atrial pacing stress test on ultrasonic integrated backscatter cyclic variations in normal subjects and in patients with coronary artery disease.
- Authors
Iliceto, S.; Galiuto, L.; Colonna, P.; Napoli, V. F.; Rizzon, P.
- Abstract
Aims To evaluate the effects of acute, atrial pacing-induced, reversible myocardial ischaemia on myocardial thickening and integrated backscatter cyclic variations in patients with or without coronary artery disease. Mehtods and results Thirty-six patients with suspected coronary artery disease underwent transoesophageal echocardiography with simultaneous atrial pacing, and coronary angiography. In myocardial segments not related to a significantly narrowed coronary artery, both from patients with and without coronary artery disease, thickening and integrated backscatter cyclic variations were not reduced at peak pacing. In segments related to a significantly narrowed coronary artery, thickening decreased at peak pacing, was still reduced at pacing interruption and recovered at 2 mm, while backscatter cyclic variations, blunted at peak pacing, immediately recovered after pacing interruption. Conclusions During stress-induced myocardial ischaemia, backscatter cyclic variations are blunted and thickening reduced. Returning to baseline, pre-atrial pacing values occur more rapidly in backscatter cyclic variations than when thickening takes place. Evaluation of stress-induced alterations in backscatter cyclic variations may aid in the identification of ischaemia-induced regional left ventricular functional impairment and, hence, in coronary artery disease diagnosis.
- Publication
European Heart Journal, 1997, Vol 18, Issue 10, p1590
- ISSN
0195-668X
- Publication type
Article
- DOI
10.1093/oxfordjournals.eurheartj.a015138