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Hypertension. 1997 Nov;30(5):1072-7.

Malignant vagotonia due to selective baroreflex failure.

Author information

1
Autonomic Dysfunction Center, Vanderbilt University, Nashville, Tenn 37232-2195, USA.
2
Vanderbilt U, Nashville, TN

Abstract

Baroreflex failure is characterized by dramatic fluctuations of sympathetic activity and paroxysms of hypertension and tachycardia. In contrast, unopposed parasympathetic activity has not been described in patients with baroreflex failure because of concurrent parasympathetic denervation of the heart. We describe the unusual case of a patient with baroreflex failure in a setting of preserved parasympathetic control of HR manifesting episodes of severe bradycardia and asystole. Thus, parasympathetic control of the HR may be intact in occasional patients with baroreflex failure. Patients with this selective baroreflex failure require a unique therapeutic strategy for the control of disease manifestations.

PMID:
9369258
[Indexed for MEDLINE]
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