Key result
Essential hypertension was associated with a significantly smaller rise in venous pressures and a greater rise in total peripheral resistance after cardiac effector blockade during Valsalva maneuvers.
Why the study?
How do haemodynamic and heart rate responses to Valsalva manoeuvres differ between essential hypertensive and normotensive subjects?
Population
29 subjects, including 19 normotensives and 10 essential hypertensive subjects with minimal complications.
Comparison
Valsalva manoeuvres of standard 30 s duration… vs Normotensive subjects.
Design
Cross-sectional
Authors
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Should not yet alter Valsalva interpretation in hypertension; leaves open baroreflex or structural mechanisms in essential hypertension.
Cross-Sectional (n=29)
How do haemodynamic and heart rate responses to Valsalva manoeuvres differ between essential hypertensive and normotensive subjects?
Essential hypertensive subjects exhibit altered venous filling and reflex constrictor responses during Valsalva manoeuvres compared to normotensives, likely due to structural and baroreceptor differences.
Korner et al. (1979) conducted a cross-sectional in Essential hypertension (n=29). Essential hypertension vs. Normal blood pressure was evaluated on Haemodynamic and heart rate responses to graded expiratory pressures during Valsalva manoeuvres. Essential hypertension was associated with a significantly smaller rise in venous pressures and a greater rise in total peripheral resistance after cardiac effector blockade during Valsalva maneuvers.
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