[Increased rate-pressure product as predictor for the absence of significant obstructive coronary artery disease in patients with positive exercise test].
OBJECTIVE
To correlate values of rate-pressure product (RPP) above 30,000 mmHg.bpm with or without significant obstructive coronary artery disease (CAD) in patients with positive exercise test.


METHODS
A retrospective analysis of 246 patients that had been submitted to Exercise Treadmill Test (ETT) up to 30 days before coronary angiography on suspicion of obstructive disease. The 165 patients in which the ETT was positive were analyzed considering as positive the presence of horizontal or descending depression of the ST segment for at least 1 mm, 0.08 seconds after J point.


RESULTS
Among the 165 appraised patients, 50 (30.3%) reached RPP > 30,000 mmHg.bpm, of which 38 (76%) had normal coronary vessel angiography or low degree obstructive coronary artery disease and 12 (24%) had significant. Among the remaining 115 appraised patients with positive ETT and RPP < 30,000 mmHg.bpm, 59 (51.3%) were normal or with low significance obstructive coronary artery disease, and 56 (48.7%) had significant disease. (Odds Ratio = 0.3327 CI 95% = 0.1579 to 0.7009; P = 0.0034).


CONCLUSIONS
Based on data collected in the present investigation, it has been demonstrated that RPP above 30,000 mmHg.bpm stands as a relevant variable to predict the absence of significant obstructive coronariopathy in individuals with positive ET and as a useful tool in making clinical decisions.
Fornitano
Luis Domingos
LD
Faculdade de Medicina, Famerp, Hospital de Base da Fundação, São José do Rio Preto, SP.
Godoy
Moacir Fernandes de
MF
D000328:Adult; D000368:Aged; D001794:Blood Pressure / Q000502:physiology*; D002932:Cineangiography; D003324:Coronary Artery Disease / Q000175:diagnosis*; D005080:Exercise Test / Q000592:standards*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies