Why the study?
Changes in arterial compliance are among the earliest detectable in hypertensive syndrome, making reproducible non-invasive methods compared to the gold standard desirable in clinical practice.
Does oscillometry provide comparable central blood pressure and arterial stiffness measurements to tonometry in patients with borderline or stage 1 hypertension?
Does oscillometry provide comparable central blood pressure and arterial stiffness measurements to tonometry in patients with borderline or stage 1 hypertension?
Oscillometry provides comparable central systolic blood pressure and augmentation index to tonometry, but underestimates pulse wave velocity and central pulse pressure in patients with early-stage hypertension.
Tonometry-oscillometry agreement for central pressures is hypothesis-generating; leaves open clinical adoption in borderline hypertension.
Background Changes in arterial compliance are among the first changes detectable in hypertensive syndrome. Methods with good reproducibility as compared with the gold standard for identifying such changes are desirable in clinical practice. Objectives To compare central pressure measurements and arterial stiffness obtained by two non-invasive methods (tonometry and oscillometry). Methods This was a descriptive, cross-sectional study with a convenience sample of patients with borderline hypertension or stage 1 hypertension. Peripheral and central blood pressure measurements were obtained by tonometry (SphygmoCor®), considered the gold standard, and oscillometry (Mobil O´graph®). Comparisons of results were made by unpaired t-test, and p values < 0.05 were considered statistically significant. Results No difference was found in central pressure measurements obtained by SphygmoCor® (117 x 80.1 mmHg) compared with Mobil O’graph (112 x 81.4 mmHg). Mean augmentation index (AIx) was 26.1% and 21.3%, and mean pulse pressure (PP) amplification 10.7 mmHg and 10.0 mmHg by Sphygmocor® and Mobil O´graph®, respectively (p > 0.05). Mean pressure wave velocity (PWV), 8.4 m/s vs. 7.4 m/s (p = 0.013) and mean central pulse pressure, 37.7 mmmHg and 30.9 mmHg (p = 0.013) were significantly higher by SphygmoCor® than Mobil O´graph®. Conclusion Values of central systolic blood pressure, AIx and pulse pressure amplification obtained by oscillometry were not statistically different compared with tonometry; values of PWV and cPP, however, were underestimated by oscillometry. (Int J Cardiovasc Sci. 2020; 33(2):145-150)
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Barroso et al. (2020) studied this question.
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