Key result
Asian and Black healthy adults exhibited a significantly greater fall in systolic blood pressure during the strain phase of the Valsalva maneuver compared to Caucasians.
Why the study?
Are there ethnic differences in physiological responses associated with the Valsalva maneuver in healthy adults?
Cross-Sectional (n=128)
Are there ethnic differences in physiological responses associated with the Valsalva maneuver in healthy adults?
There are significant ethnic differences in resting cardiovascular indices and physiological responses to the Valsalva maneuver among healthy adults.
May necessitate ethnicity-specific Valsalva reference ranges; leaves open clinical or prognostic relevance.
Ethnic differences in cardiovascular indices at rest and across the Valsalva maneuver (VM) were studied in 30 Asian, 86 Caucasian, and 12 Black healthy men and women aged 30 to 55 years. Subjects simulated the VM by blowing into an aneroid pressure-gauge meter to 40 mmHg for 10 seconds. Resting systolic blood pressure (SBP) was significantly higher in Blacks than in Asians or Caucasians. During the strain phase of the VM, the fall in SBP from baseline was significantly greater in Asians and Blacks than in Caucasians. Further, Asians had the greatest overshoot of SBP above baseline. Although resting heart rate was significantly higher in Asians compared to Caucasians, there were no differences in heart rate responses to the VM. Reduction in carotid artery blood flow velocity during strain was significantly less in Blacks. We conclude that there are ethnic differences in cardiovascular indices at rest and across the VM.
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Lu et al. (1990) conducted a cross-sectional in Healthy (n=128). Ethnicity (Asian and Black) vs. Caucasian was evaluated on Cardiovascular indices at rest and across the Valsalva maneuver. Asian and Black healthy adults exhibited a significantly greater fall in systolic blood pressure during the strain phase of the Valsalva maneuver compared to Caucasians.
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