Key result
In asymptomatic adults undergoing exercise stress testing, ST-segment abnormalities occurred in 6.7% of women and 4.5% of men (not significant), while each 1-year increase in age increased the risk by 4%.
Why the study?
Are there gender differences in performance and ST-T wave changes during treadmill exercise testing in asymptomatic healthy individuals?
Cross-Sectional (n=441)
Are there gender differences in performance and ST-T wave changes during treadmill exercise testing in asymptomatic healthy individuals?
Healthy men and women exhibit different physiologic responses to exercise stress testing, such as functional capacity and heart rate recovery, but no significant differences in ST-segment changes.
Answers are grounded in this paper and cite their sources.
No gender difference in exercise ST changes supports uniform criteria; leaves open age-adjusted norms in asymptomatic adults.
The aim of this study was to test the hypothesis of differences in performance including differences in ST-T wave changes between healthy men and women submitted to an exercise stress test. Two hundred (45.4%) men and 241 (54.6%) women (mean age: 38.7 +/- 11.0 years) were submitted to an exercise stress test. Physiologic and electrocardiographic variables were compared by the Student t-test and the chi-square test. To test the hypothesis of differences in ST-segment changes, data were ranked with functional models based on weighted least squares. To evaluate the influence of gender and age on the diagnosis of ST-segment abnormality, a logistic model was adjusted; P < 0.05 was considered to be significant. Rate-pressure product, duration of exercise and estimated functional capacity were higher in men (P < 0.05). Sixteen (6.7%) women and 9 (4.5%) men demonstrated ST-segment upslope >or=0.15 mV or downslope >or=0.10 mV; the difference was not statistically significant. Age increase of one year added 4% to the chance of upsloping of segment ST >or=0.15 mV or downsloping of segment ST >or=0.1 mV (P = 0.03; risk ratio = 1.040, 95% confidence interval (CI) = 1.002-1.080). Heart rate recovery was higher in women (P < 0.05). The chance of women showing an increase of systolic blood pressure
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Chalela et al. (2009) conducted a cross-sectional in Asymptomatic without evidence of heart disease (n=441). Female sex vs. Male sex was evaluated on ST-segment upslope ≥0.15 mV or downslope ≥0.10 mV (p=not statistically significant). In asymptomatic adults undergoing exercise stress testing, ST-segment abnormalities occurred in 6.7% of women and 4.5% of men (not significant), while each 1-year increase in age increased the risk by 4%.
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