Improving post-cardiac arrest cerebral perfusion pressure by elevating the head and thorax

Area of Science:

• Cardiovascular Research
• Neurocritical Care
• Emergency Medicine

Background:

• The optimal patient positioning after return of spontaneous circulation (ROSC) following cardiac arrest (CA) remains undetermined.
• Investigating head and thorax elevation as a potential intervention to improve neurological outcomes post-ROSC is crucial.

Purpose of the Study:

• To evaluate the efficacy of head and thorax elevation in a porcine model of cardiac arrest.
• To determine the impact of this positioning on cerebral perfusion pressure (CerPP) and intracranial pressure (ICP).

Main Methods:

• Anesthetized pigs underwent induced cardiac arrest (CA) followed by resuscitation.
• Protocols involved varying durations of CA and cardiopulmonary resuscitation (CPR) methods (ACD+ITD or conventional).
• Pigs were randomized to head-up position (HUP) or flat position post-ROSC, with physiological parameters monitored.

Main Results:

• Head-up position (HUP) significantly reduced intracranial pressure (ICP) post-ROSC compared to the flat position (9.1 vs. 18.5 mmHg).
• Cerebral perfusion pressure (CerPP) was significantly higher in the HUP group compared to the flat group (62.5 vs. 53.2 mmHg).
• These beneficial effects on ICP and CerPP were observed irrespective of the duration of ventricular fibrillation (VF) or the CPR technique used.

Conclusions:

• Head and thorax elevation post-ROSC in a porcine model improves cerebral perfusion.
• This positioning strategy also leads to a significant reduction in intracranial pressure.
• The findings suggest that head and thorax elevation may be a beneficial intervention following cardiac arrest.