During ACLS, which metrics should be monitored continuously to detect ROSC?

During ACLS, which metrics should be monitored continuously to detect ROSC?

• A. End-tidal CO2 and rhythm.
• B. Only blood pressure.
• C. Only SpO2.
• D. Temperature.

Answer: (A)

Detecting return of spontaneous circulation relies on real-time signs of actual blood flow and heart activity. End-tidal CO2 measured by capnography is a direct cue to pulmonary blood flow and cardiac output. During CPR, ETCO2 is usually low; if ROSC occurs, suddenly more CO2-rich blood reaches the lungs and the ETCO2 rises quickly with a clear waveform. That rapid, sustained increase is a reliable signal that circulation has resumed. At the same time, monitoring the heart rhythm with the ECG shows whether a perfusing rhythm has returned. An organized, circulating rhythm indicates that the heart’s electrical activity is capable of sustaining circulation, guiding the transition from CPR to post-arrest care. Other metrics like blood pressure, SpO2, or temperature don’t provide as immediate or dependable a read on ROSC during resuscitation. Blood pressure readings can be unreliable during CPR, SpO2 can be distorted by airway management and chest compressions, and temperature isn’t a timely indicator of ROSC.

Detecting return of spontaneous circulation relies on real-time signs of actual blood flow and heart activity. End-tidal CO2 measured by capnography is a direct cue to pulmonary blood flow and cardiac output. During CPR, ETCO2 is usually low; if ROSC occurs, suddenly more CO2-rich blood reaches the lungs and the ETCO2 rises quickly with a clear waveform. That rapid, sustained increase is a reliable signal that circulation has resumed.

At the same time, monitoring the heart rhythm with the ECG shows whether a perfusing rhythm has returned. An organized, circulating rhythm indicates that the heart’s electrical activity is capable of sustaining circulation, guiding the transition from CPR to post-arrest care.

Other metrics like blood pressure, SpO2, or temperature don’t provide as immediate or dependable a read on ROSC during resuscitation. Blood pressure readings can be unreliable during CPR, SpO2 can be distorted by airway management and chest compressions, and temperature isn’t a timely indicator of ROSC.