2nd April 2024

You are one hour into a cardiac arrest after thrombolysis for a young woman with massive pulmonary thromboembolism.

You are one hour into a cardiac arrest after thrombolysis for a young woman with massive pulmonary thromboembolism. Waveform capnography is in place. After the next defibrillation attempt, you see a spike in the end-tidal CO₂. What does this indicate? 

Select the SINGLE most appropriate option from the list below. Select ONE option only.