Welch Allyn 1500 Patient Monitor v.1.4.X - User Manual - Manual (Page 53)

Directions for use Monitoring and Measurements 49
ECG alarms and messages
Message Possible cause Suggested action
HR – asystole/ASY No QRS detected for 4 seconds. Check the patient.
ECG signal lower than 0.5 mV.
HR – ventricular
fibrillation/VF No organized ventricular rhythm
detected. Check the patient.
ECG signal lower than 0.5 mV.
HR – artifact Patient has moved. Calm the patient.
Bad electrode. Checking the electrode pads.
Interferences by other devices. Remove source of the interference.
HR > [upper limit]
HR < [lower limit] Heart rate higher/lower than
alarm limit. Check the patient.
HR – lead off Electrode lose/defective. Check and reapply/replace electrodes.
Patient cable defective. Replace the patient cable.