Key result
Baroreceptor ablation in spontaneously hypertensive rats showed a 43% loss of aortic inhibitory function, indicating hypertension is due to central resetting rather than baroreceptor dysfunction.
Why the study?
Does baroreceptor dysfunction cause the high sympathetic nerve activity and mean arterial pressure observed in spontaneously hypertensive rats?
Population
Spontaneously hypertensive rats (SHR) and normotensive Kyoto Wistar rats (WKY) aged 5 to 40 weeks
Comparison
Ablation of all four major baroreceptors and… vs Normotensive WKY rats and baseline intact state
Design
Preclinical
Authors
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Central mechanisms predominate in SHR hypertension; hypothesis-generating for human baroreflex therapies, no practice change.
Does baroreceptor dysfunction cause the high sympathetic nerve activity and mean arterial pressure observed in spontaneously hypertensive rats?
Hypertension in spontaneously hypertensive rats appears to be driven by central resetting of sympathetic centers rather than primary baroreceptor dysfunction.
Judy et al. (1979) studied Hypertension. Baroreceptor ablation vs. Normotensive Kyoto Wistar rats (WKY) was evaluated on Sympathetic nerve activity (SNA) and mean arterial pressure (MAP). Baroreceptor ablation in spontaneously hypertensive rats showed a 43% loss of aortic inhibitory function, indicating hypertension is due to central resetting rather than baroreceptor dysfunction.
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