St. Jude Medical Merlin PSA EX3100, Help Manual

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9-4 Additional Information
Accessed From: Print Menu button > Settings tab
Safe Pacing
The Merlin PSA switches to Safe Pacing Mode if pacing is enabled and there is a loss of power or other
programmer error that prevents normal programmer function. In Safe Pacing Mode, the Merlin PSA is
powered by its backup batteries. The unit continues to operate at the last programmed settings, with
the exception of the Pulse Amplitude parameter, which is set to 10 V, and the Pulse Width parameter,
which is set to 1.5 ms. At the start of each session, the Merlin PSA measures the battery life and alerts
the user if the batteries cannot support Merlin PSA operation for at least 30 minutes. See
Battery
Information .
The Merlin PSA continues to operate in Safe Pacing mode until the batteries are depleted or until the
Merlin PSA has counted 60 consecutive cycles with no impedance load (that is, the leads have been
disconnected).
Emergency VVI Pacing
Emergency VVI pacing can be initiated using the programmer.
To begin emergency VVI pacing:
• Press the red VVI hard key on the Merlin PCS console.
All other Merlin PSA system activities are terminated when Emergency VVI Pacing is in progress.
The Merlin PSA displays a message that emergency VVI pacing is in effect.
You cannot change the settings associated with Emergency VVI pacing. These settings are as follows:
Note
The reports printed during a PSA session are always printed to the
internal printer and saved as a PDF file.
Parameter EVVI Setting
Mode VVI
Base Rate 70
min§
V. Pulse Amplitude 7.5 V
V. Pulse Width 1.5 ms
V. Sensitivity 2.0 mV
V. Refractory 400 ms
V. Pacing
1
1. CRT devices only.
Simultaneous
V. Sensing
1
RV
Table 9-1. Emergency VVI settings for the Merlin PSA