Why the study?
Does a new automated device accurately measure blood pressure compared to a sphygmomanometer during an exercise stress test in normotensive and hypertensive subjects?
Does a new automated device accurately measure blood pressure compared to a sphygmomanometer during an exercise stress test in normotensive and hypertensive subjects?
The new automated device accurately measures systolic blood pressure but underestimates diastolic blood pressure during exercise stress testing.
Caution advised for diastolic readings with automated devices in exercise testing; leaves open need for validation before routine stress-test use.
The accuracy and reproducibility of a new automatic device (P) specially designed for noninvasive blood pressure monitoring during the exercise stress test were evaluated in 50 consecutive subjects (34 normotensives and 16 hypertensives). Automatic measurements were compared with those taken by a sphygmomanometer (RR). A good agreement between systolic pressure values obtained by the two methods was found (RR 159 +/- 30 mmHg, P 158 +/- 28 mmHg, mean difference = -1.53 +/- 13 mmHg, p = 0.166, ns). On the contrary the new device significantly underestimated diastolic pressure values (RR 89.3 +/- 13 mmHg; P 84 +/- 13 mmHg, mean difference -5.37 +/- 9.3, p < 0.001). In conclusion the new device seems able to measure systolic but underestimates diastolic blood pressure both in hypertensives and in normotensives during the effort test.
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Modesti et al. (1992) studied this question.
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