Unexpected myocardial complications after controlled hypotension

Area of Science:

• Anesthesiology
• Neurosurgery
• Cardiology

Background:

• Controlled hypotension is a technique used during intracranial aneurysm clipping to reduce blood loss and improve surgical conditions.
• Previous studies have linked controlled hypotension to cardiovascular complications.
• The risk-benefit profile of controlled hypotension necessitates careful patient selection and monitoring.

Purpose of the Study:

• To report two cases of serious myocardial ischemia following controlled hypotension in patients undergoing intracranial aneurysm clipping.
• To highlight the potential for cardiovascular complications even in patients considered low-risk.
• To emphasize the importance of comprehensive intraoperative monitoring for myocardial ischemia.

Main Methods:

• Case report of two patients who developed myocardial ischemia after controlled hypotension.
• Review of anesthetic management, including monitoring techniques (ECG lead II, radial arterial blood pressure).
• Assessment of patient risk factors based on age and medical history.

Main Results:

• Both patients experienced serious myocardial ischemia despite being considered low-risk for cardiovascular complications.
• Minimal monitoring employed (ECG lead II, radial arterial blood pressure) was insufficient for early detection of ischemic events.
• The occurrence of ischemia underscores the potential cardiovascular risks associated with controlled hypotension.

Conclusions:

• Controlled hypotension for intracranial aneurysm surgery poses a risk of myocardial ischemia, even in seemingly healthy individuals.
• Anesthetic management must include robust monitoring for intraoperative myocardial ischemia.
• Comprehensive monitoring strategies are essential, regardless of perceived patient risk, when employing controlled hypotension.