[Ultrasound transcranial monitoring during aortocoronary bypass surgery under extracorporeal circulation]

Area of Science:

• Neurology
• Cardiovascular Science
• Medical Engineering

Background:

• Cerebral hemodynamics are critical during cardiac surgery.
• Extracorporeal circulation can alter blood flow dynamics.
• Monitoring the circle of Willis is essential for preventing neurological complications.

Purpose of the Study:

• To evaluate hemodynamic parameters in the circle of Willis during cardiac operations.
• To assess the utility of exercise tests and transcranial Doppler for monitoring.
• To identify methods for early diagnosis of microembolisms.

Main Methods:

• Utilized transcranial Doppler (TCD) ultrasonography.
• Incorporated various exercise tests during cardiac surgery.
• Performed monitoring under extracorporeal circulation conditions.

Main Results:

• Established methods for assessing hemodynamic parameters in the circle of Willis.
• Identified key indicators for timely diagnosis of air and material microembolisms.
• Demonstrated the clinical applicability of the procedures.

Conclusions:

• The assessed procedures are clinically substantiated for monitoring cerebral hemodynamics.
• Early preventive measures against cervical circulatory disorders can be implemented.
• Transcritical Doppler and exercise testing are valuable tools in cardiac surgery.