Key result
High-rate infusion of atrial natriuretic factor induced a greater decrease in systolic blood pressure in elderly (-12%) versus young (-4%) subjects (p<0.05), driven by higher ANF levels.
Why the study?
Does atrial natriuretic factor infusion alter hemodynamic responsiveness differently in young versus elderly subjects?
Population
17 volunteers, comprising young (n=8) and elderly (n=9) subjects
Comparison
Atrial natriuretic factor infusion at two rates… vs Placebo
Design
RCT, randomized, double-blind
Authors
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Greater BP drop with ANF infusion in elderly warrants age-adjusted dosing caution; extends evidence of preserved responsiveness but reduced clearance with aging.
RCT (n=17)
Double-blind
randomized
Does atrial natriuretic factor infusion alter hemodynamic responsiveness differently in young versus elderly subjects?
Absolute Event Rate: -12% vs -4%
p-value: p=<0.05
Advancing age does not diminish cardiovascular responsiveness to atrial natriuretic factor; rather, elderly subjects achieve higher ANF levels due to reduced clearance, leading to a seemingly increased hemodynamic response.
Jansen et al. (1990) reported an RCT. Atrial natriuretic factor (99-126) vs. Placebo was evaluated on ANF-induced decrease in systolic blood pressure during high-rate infusion (p=<0.05). High-rate infusion of atrial natriuretic factor induced a greater decrease in systolic blood pressure in elderly (-12%) versus young (-4%) subjects (p<0.05), driven by higher ANF levels.
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