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Malignant vagotonia due to selective baroreflex failure
J Jordan1, J R Shannon, B K Black
1Autonomic Dysfunction Center, Vanderbilt University, Nashville, Tenn 37232-2195, USA.
Hypertension (Dallas, Tex. : 1979)
|November 22, 1997
Summary
Baroreflex failure typically involves sympathetic overactivity. However, this case shows preserved parasympathetic control causing severe bradycardia and asystole, requiring unique treatment strategies.
Area of Science:
- Cardiovascular physiology
- Autonomic nervous system disorders
Background:
- Baroreflex failure usually presents with sympathetic hyperactivity, leading to hypertension and tachycardia.
- Concurrent parasympathetic denervation of the heart prevents unopposed parasympathetic activity in typical baroreflex failure.