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[Occurrence of a hyperactive carotid sinus in myocardial infarction (author's transl)]
Zeitschrift Fur Kardiologie
|January 1, 1981
Insights
A hyperactive carotid sinus reflex is common in acute myocardial infarction patients, particularly with inferior wall damage. This reflex often resolves within four weeks, suggesting myocardial necrosis triggers it.
Area of Science:
- Cardiology
- Neuroscience
- Physiology
Context:
- Acute myocardial infarction (AMI) can affect autonomic nervous system function.
- The carotid sinus reflex plays a role in cardiovascular regulation.
- Investigating post-infarction autonomic changes is crucial for understanding recovery.
Purpose:
- To assess the prevalence and changes in carotid sinus reflex activity in patients with acute myocardial infarction.
- To determine if myocardial necrosis influences carotid sinus reflex hyperreactivity.
Summary:
- Carotid sinus message was performed in 41 acute myocardial infarction patients within 48 hours and at 4 weeks post-infarction.
- A hyperactive carotid sinus reflex was observed in 29.3% on day one, decreasing to 9.8% at 4 weeks.
- Hyperactivity was four times more frequent in inferior wall than anterior wall infarctions, indicating myocardial necrosis may provoke this reflex.
Impact:
- Findings suggest a transient autonomic dysfunction following myocardial infarction.
- Understanding these reflex changes may inform risk stratification and management strategies.
- Further research into the mechanisms linking myocardial necrosis and reflex alterations is warranted.
Abstract:
In 41 patients with acute myocardial infarction, carotid sinus message was performed during the first 48 hours and again 4 weeks later. A hyperactive carotid sinus reflex was found in 12 cases (29.3%) in the first post-infarction day, only in 4 cases (9.8%) 4 weeks later. Hyperactive carotid sinus reflexes occurred four times more in inferior wall than in anterior wall infarction. Myocardial necrosis seems to be able to provoke an hyperactive carotid sinus reflex.