Medtronic PROTECTA XT DR D314DRG, Руководство для клиницистов

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9.6.2.2 Selecting the high-voltage electrodes and current pathway
The Active Can/SVC Coil parameter and the Pathway parameter specify the electrodes and
direction of current flow for defibrillation and cardioversion pulses. The Active Can/SVC Coil
parameter has the following settings:
●
The Can+SVC On setting connects the Active Can (HVA) and the SVC Coil (HVX).
Current flows between these electrodes and the RV Coil (HVB).
●
The Can Off setting disables the Active Can feature. In this case, an SVC lead must be
implanted. Current flows between the SVC Coil (HVX) and the RV Coil (HVB).
●
The SVC Off setting ensures that the SVC lead, if implanted, is not used. Current flows
between the Active Can (HVA) and the RV Coil (HVB).
The settings for the Pathway parameter are AX>B and B>AX. AX refers to the HVA and
HVX electrodes, which may be used individually or in combination. B refers to the HVB
electrode. The Pathway setting defines direction of current flow during the initial segment
of the biphasic waveform. If the parameter is set to AX>B, current flows from the Active Can
and SVC Coil to the RV Coil. If the parameter is set to B>AX, this current flow is reversed.
9.6.2.3 Scheduling an automatic atrial cardioversion
The device schedules an automatic CV therapy if the following conditions are met:
●
CV is enabled for the given rhythm classification (AT/AF or Fast AT/AF).
●
An undelivered CV therapy is available for the given rhythm classification.
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An atrial episode is in progress at the time of the scheduled delivery.
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The episode duration occurs within a programmable delivery window.
●
The maximum number of atrial shocks per day has not been reached.
For more information about the scheduling parameters, see Section 9.4, “Scheduling atrial
therapies”, page 389. When the CV therapy is scheduled, the device starts charging the
capacitors.
Medtronic PROTECTA™ XT DR D314DRG
Clinician Manual 409