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Long-term effect of carotid endarterectomy on carotid sinus baroreceptor function and blood pressure control
1Surgical Unit, St. Bartholomew's Hospital, West Smithfield, London, UK.
Insights
Carotid endarterectomy does not cause long-term low blood pressure. This study found no significant changes in blood pressure or baroreceptor function six months after the procedure.
Area of Science:
- Vascular Surgery
- Cardiovascular Physiology
Background:
- Carotid endarterectomy is a surgical procedure to remove plaque from carotid arteries.
- Potential alterations in carotid sinus baroreceptor function post-surgery warrant investigation for long-term hemodynamic effects.
Purpose of the Study:
- To evaluate the long-term impact of carotid endarterectomy on blood pressure.
- To assess whether the procedure affects carotid sinus baroreceptor function, potentially leading to hypotension.
Main Methods:
- Blood pressure and carotid sinus baroreceptor function were monitored in 25 patients before and 6 months after carotid endarterectomy.
- Statistical analysis was performed to correlate changes in baroreceptor function with blood pressure variations.
Main Results:
- No significant overall change in blood pressure was observed 6 months post-surgery.
- Carotid sinus baroreceptor function showed varied responses: decreased in 8%, unchanged in 60%, and increased in 32% of patients.
- No correlation was found between altered sinus function and blood pressure changes over the 6-month period.
Conclusions:
- Carotid endarterectomy does not appear to induce a long-term hypotensive effect.
- The procedure does not significantly alter baroreceptor function in a manner that consistently lowers blood pressure.
Abstract:
In order to assess whether carotid endarterectomy had any long-term hypotensive effect, by altering the function of the carotid sinus baroreceptors, blood pressure and carotid sinus baroreceptor function were recorded in 25 patients undergoing carotid endarterectomy. No overall change in blood pressure was recorded 6 months after surgery. Sinus function was shown to decrease in 2 (8 per cent), to remain unchanged in 15 (60 per cent) and to increase in 8 (32 per cent) patients 6 months postoperatively. There was no relationship between changes in sinus function and changes in blood pressure over the 6 months period. Thus, carotid endarterectomy has no long-term hypotensive effect.