Key result
In rabbits with acute left ventricular overloading induced by aortic regurgitation, baroreceptor-heart rate sensitivity significantly decreased at 1 week but partially recovered by 4 weeks.
Why the study?
Does acute left ventricular overloading induced by aortic regurgitation alter baroreceptor-heart rate sensitivity in rabbits?
Population
13 rabbits (7 with induced aortic regurgitation, 6 sham-operated)
Comparison
Acute left ventricular overloading induced by… vs Sham operation
Design
Preclinical
Follow-up
4 weeks
Authors
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May transiently impair baroreflex sensitivity in this model; leaves open human translation and clinical relevance.
Does acute left ventricular overloading induced by aortic regurgitation alter baroreceptor-heart rate sensitivity in rabbits?
p-value: p=<0.01
Baroreceptor-heart rate sensitivity decreases acutely after left ventricular overloading but partially recovers during the compensatory phase.
Nishimura et al. (1998) studied Acute left ventricular overloading (Aortic Regurgitation) (n=19). Aortic regurgitation (AR) induction vs. Sham operation was evaluated on Baroreceptor-heart rate sensitivity (msec/mmHg) (p=<0.01). In rabbits with acute left ventricular overloading induced by aortic regurgitation, baroreceptor-heart rate sensitivity significantly decreased at 1 week but partially recovered by 4 weeks.
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