[Evaluation of Doppler echocardiography stress test with transesophageal atrial pacing in detecting coronary artery disease].
Doppler echocardiographic transesophageal atrial pacing stress test was performed in 23 patients with coronary artery disease (CAD) and 35 normal subjects. It was found that 1/3 filling fraction (1/3 FF) decreased and peak flow velocity of atrial contraction (APFV), time velocity integral of atrial contraction (ATVI) and the ratio of ATVI to total TVI (ATVI/TTVI) increased immediately after rapid atrial pacing in CAD group. No differences were found between before and after pacing in normal group. Using 2 of the 3 criteria ATVI/TTVI greater than 0.35, ATVI increases and 1/3 FF decreases after pacing as the criteria for diagnosis in CAD, the sensitivity was 86% and specificity was 77%. Thus, Doppler echocardiographic transesophageal atrial pacing stress test may be a feasible, reliable and noninvasive method in detecting CAD.
Hua
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Xuan Wu Hospital, Capital Institute of Medicine, Beijing.
D000328:Adult; D002304:Cardiac Pacing, Artificial / Q000379:methods; D003327:Coronary Disease / Q000175:diagnosis* / Q000503:physiopathology; D003971:Diastole; D015150:Echocardiography, Doppler; D005260:Female; D006325:Heart Atria; D006801:Humans; D008297:Male; D008875:Middle Aged; D012680:Sensitivity and Specificity; D016277:Ventricular Function, Left / Q000502:physiology*