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Prognostic and predictive value of exertional hypotension in suspected coronary heart disease
Insights
Exertional hypotension in coronary artery disease patients indicates poorer survival. However, maximum exercise systolic pressure is a stronger predictor of survival than exertional hypotension itself.
Area of Science:
- Cardiology
- Clinical Medicine
- Exercise Physiology
Background:
- Exertional hypotension is a potential indicator of cardiovascular risk.
- Its prognostic and predictive value in coronary artery disease (CAD) requires further elucidation.
Purpose of the Study:
- To assess the prognostic and predictive value of exertional hypotension in patients with coronary artery disease.
- To compare its predictive power against maximum exercise systolic pressure and other indicators of disease severity.
Main Methods:
- Analysis of 1,241 patients undergoing treadmill maximal exercise testing and coronary arteriography.
- Follow-up averaging 5.4 years to assess survival outcomes.
- Correlation of exertional hypotension with survival rates, extent of CAD, and left ventricular (LV) function.
Main Results:
- Patients with exertional hypotension and CAD showed poorer survival compared to those without.
- Maximum systolic pressure during exercise was a more potent predictor of survival than exertional hypotension.
- Exertional hypotension was associated with more extensive CAD and LV dysfunction, likely explaining impaired survival.
- Exertional hypotension demonstrated low sensitivity for detecting significant left main coronary artery stenosis, 3-vessel disease, or severe resting LV dysfunction.
Conclusions:
- While exertional hypotension is linked to poorer survival in CAD patients, maximum exercise systolic pressure offers superior prognostic value.
- Exertional hypotension's association with CAD extent and LV dysfunction highlights its role, but it is not a sensitive marker for critical coronary artery disease or severe LV dysfunction.
Abstract:
The prognostic and predictive value of exertional hypotension was assessed in 1,241 patients having treadmill maximal exercise testing, coronary arteriography, and follow-up averaging 5.4 years. Medically treated patients with coronary artery disease (CAD) with exertional hypotension had poorer survival than did those without such hypotension; however, maximum systolic pressure during exercise was a more powerful predictor of survival. Patients with exertional hypotension had more extensive CAD and more left ventricular (LV) dysfunction than did patients who had an increase in blood pressure with exertion; these findings probably account for the impaired survival. However, exertional hypotension, was an insensitive indicator of significant left main coronary artery stenosis, 3-vessel disease, or severe resting LV dysfunction.