// AEMT Question · Advanced Airway
Sudden loss of ETCO2 waveform during ventilation of an intubated patient MOST LIKELY indicates:
A. Hyperventilation
B. Displaced/dislodged tube or cardiac arrestCorrect
C. Bronchospasm
D. Fever
// Rationale
A flat capnograph = no exhaled CO2, suggesting tube displacement, obstruction, or loss of circulation.