Femoral Arterial Doppler Use During Active Cardiopulmonary Resuscitation

Area of Science:

• Cardiology
• Emergency Medicine
• Medical Imaging

Background:

• Resumption of spontaneous organized cardiac activity is a critical determinant of survival during cardiac arrest.
• Current methods to detect this resumption often require pausing cardiopulmonary resuscitation (CPR), potentially compromising cerebral and myocardial blood flow.

Purpose of the Study:

• To explore the utility of femoral arterial Doppler in identifying and characterizing the return of spontaneous cardiac activity (ROSC) during active CPR.
• To assess the sensitivity and specificity of arterial Doppler in detecting native cardiac pulsations without interrupting CPR.

Main Methods:

• A proof-of-concept study involving 16 patients undergoing active CPR for cardiac arrest.
• Common femoral artery Doppler was recorded during both active CPR and pauses.
• Echocardiography was used to classify cardiac activity as absent, disorganized, or organized.

Main Results:

• Native cardiac-induced arterial tracings were detected during 18.8% of active CPR periods and 39.6% of pauses.
• Arterial Doppler demonstrated 100% specificity and 50% sensitivity for detecting organized cardiac activity.
• Patients with visible native cardiac pulsations during active CPR had 0% mortality versus 67% in those without.

Conclusions:

• Femoral arterial Doppler shows promise as a non-invasive tool to detect the return of cardiac activity during ongoing CPR.
• Further research is warranted to validate these findings and integrate this technique into clinical practice.