[Pressure profile during exertion in subjects aged 70 years and older]

One hundred and fifty-four patients from 70 to 85 years old (mean 74.5 +/- 4.5 years), including 105 men and 49 women, underwent a bicycle exercise test, in the upright position, with 3 minutes triangular levels (levels of 20 watts or more often 30 watts). Blood pressure (BP) was measured at rest and at the end of each level, using the auscultatory method and a mercury manometer. These 154 patients were divided in 59 "healthy" old people, 21 patients suffering from coronary insufficiency but with normal BP, 12 hypertensive patients and 62 patients receiving antihypertensive therapy. The results showed, as in younger people, a linear relation between BP and heart rate (HR). The slope of BP reported to HR determined the exercise BP of each subject. The mean value of "healthy" old people defined the normal exercise BP of people over 70 years old. Slope of systolic blood pressure (SBP) was higher in men than in women, but declined in both sexes in people over 80 years old. Slope of SBP was lower in the case of coronary insufficiency. In hypertensive patients, slope of SBP was the same as in normotensive patients, but was shifted upward. Finally mean exercise BP was lower in patients receiving antihypertensive therapy, compared to non-treaded patients with equal rest BP. The knowledge of exercise BP is useful for the right interpretation of exercise testing in old people suffering from coronary insufficiency or hypertension, as well as in presumed healthy old people.