Why the study?
Do hemodynamic responses to passive orthostasis differ between younger and older men?
Do hemodynamic responses to passive orthostasis differ between younger and older men?
Older men exhibit blunted initial blood pressure and heart rate responses to orthostatic stress compared to younger men, potentially due to reduced venous compliance.
In this study, we monitored the changes in arterial blood pressure continuously in two groups of Caucasian men during normal passive orthostasis as well as reversed passive orthostasis. Group A consisted of a group of 23 younger men (16 +/- 0.5 years) and group B consisted of 21 older men (62.9 +/- 2.7 years). The normal passive orthostatic test and the reversed passive orthostatic test were used to induce blood pressure changes. We found that the temporary and initial changes in blood pressure during the normal and reversed orthostatic tests were significantly lower in the older group. Heart rate increases were also lower in the older group. These findings could be explained in terms of a reduced compliance of the thin walled venous blood vessels in the elderly.
No takes yet. Share an insight, caveat, or question.
Huisman et al. (1999) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: