Medtronic PROTECTA XT DR D314DRG, Руководство для клиницистов

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Figure 146. Initial Beats to Detect calculation for VT
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VT event count
ECG
VT interval
VT event count
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VT interval
Marker Channel
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1 Ventricular tachycardia starts, and sensed ventricular intervals in the VT detection zone are
classified as VT events (marked TS).
2 A sensed ventricular interval occurs outside the VT detection zone. VT detection restarts.
3 The programmed VT Initial Beats to Detect value of 16 events is reached, and the device detects
VT (indicated by the TD marker).
8.2.2.3 Detecting 2 clinical VTs
A fast ventricular tachyarrhythmia (FVT) detection zone may be used to allow different
therapeutic approaches for a patient who exhibits 2 VTs of different rates. To detect 2 clinical
VTs, program FVT Detection to via VT and select a V. Interval (Rate) value for FVT. To help
ensure that the patient’s fast ventricular tachycardia is classified as FVT, select a value that
matches the longest ventricular interval that typically occurs during the patient’s fast VT.
Medtronic PROTECTA™ XT DR D314DRG
308 Clinician Manual