Transient orthostatic hypertension after partial cerebellar resection

Area of Science:

• Neurology
• Cardiovascular Physiology
• Autonomic Nervous System

Background:

• The baroreflex and autonomic pathways are crucial for maintaining blood pressure homeostasis during daily activities like postural changes.
• Cerebellar functions extend beyond motor control to include autonomic modulation, influencing cardiovascular regulation.

Observation:

• A 20-year-old male presented with cerebellar hematoma and acute hydrocephalus, undergoing vermian and partial right cerebellar hemisphere resection.
• Post-surgery, the patient developed severe orthostatic hypertension (OHT) with a >60 mmHg systolic BP rise upon standing and mutism.
• Elevated plasma noradrenaline levels (fivefold increase) were observed upon standing in the acute phase.

Findings:

• Surgical resection of the cerebellum transiently impaired autonomic modulation and baroreflex function, leading to OHT.
• The patient's condition resolved over 8 weeks, with improved blood pressure regulation and communication.
• This case highlights a potential link between cerebellar dysfunction and orthostatic hypertension.

Implications:

• Transient cerebellar autonomic dysfunction can manifest as orthostatic hypertension, challenging typical baroreflex understanding.
• Cerebellar modulation plays a significant role in maintaining cardiovascular stability, particularly during postural transitions.
• Further research into cerebellar autonomic pathways could reveal new therapeutic targets for autonomic disorders.