Related Experiment Videos
Ethnic differences in physiological responses associated with the Valsalva maneuver
Z Y Lu1, B L Metzger, B Therrien
1School of Nursing, University of Michigan, Ann Arbor 48109.
Research in Nursing & Health
|February 1, 1990
Summary
Cardiovascular responses to the Valsalva maneuver (VM) differ significantly across ethnic groups. Black individuals exhibit higher resting systolic blood pressure, while Asian and Black individuals show greater blood pressure drops during the VM strain phase.
Area of Science:
- Cardiovascular Physiology
- Human Physiology
- Ethnic Health Disparities
Background:
- Understanding ethnic variations in cardiovascular function is crucial for accurate health assessments.
- The Valsalva maneuver (VM) is a standard physiological test to evaluate autonomic cardiovascular reflexes.
Purpose of the Study:
- To investigate ethnic differences in cardiovascular indices at rest and during the Valsalva maneuver (VM).
- To compare cardiovascular responses among Asian, Caucasian, and Black healthy adults.
Main Methods:
- 30 Asian, 86 Caucasian, and 12 Black healthy men and women (aged 30-55) participated.
- Subjects performed the VM by maintaining 40 mmHg pressure for 10 seconds.
- Cardiovascular indices including blood pressure and heart rate were measured at rest and during the VM.
Main Results:
- Black individuals had significantly higher resting systolic blood pressure (SBP) than Asians or Caucasians.
- SBP fall during VM strain was greater in Asians and Blacks compared to Caucasians.
- Asians exhibited the largest SBP overshoot post-VM; Black individuals showed less reduction in carotid artery blood flow velocity during strain.
Conclusions:
- Significant ethnic variations exist in resting cardiovascular parameters and responses to the Valsalva maneuver.
- These findings highlight the importance of considering ethnicity in the interpretation of cardiovascular assessments.