Medtronic PROTECTA XT DR D314DRG, Clinician Manual

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Ventricular rate during VT/VF – This trend may provide an indication of the effects of
antiarrhythmic drugs on VT and VF rates, and give a better understanding of the safety
margins for detection.
The graph displays the median ventricular rate during spontaneous VT and VF episodes.
Multiple points on one day represent multiple episodes with different median rates. The
horizontal lines indicate the programmed VF, VT, and FVT detection rates, if applicable.
Non-sustained VT episodes per day – This trend may help you to correlate patient
symptoms (such as palpitations) to non-sustained VT episodes and may indicate a need
for further investigation of the status of the patient.
6.5.2.3 Assessing AT/AF arrhythmia information
Figure 36. AT/AF arrhythmia trend graphs
AT/AF total hours per day – This trend may help you to assess the need to adjust the
patient’s device or drug-based therapies. It may also reveal the presence of asymptomatic
episodes of AT/AF.
The device records a daily total for the time the patient spent in atrial arrhythmia. The time
in AT/AF is calculated from the point of AT/AF onset. This trend may be reported in hours
(0 to 24) or minutes (0 to 60) per day depending on the maximum duration per day. For more
information about AT/AF detection, see Section 8.1, “Detecting atrial tachyarrhythmias”,
page 295.
Ventricular rate during AT/AF – You can use this trend to perform the following
assessments:
●
Correlate patient symptoms to rapid ventricular responses to AT/AF.
●
Assess VT/VF detection safety margins and modify programming to avoid treating
rapidly conducted AT/AF as VT/VF.
Medtronic PROTECTA™ XT DR D314DRG
Clinician Manual 151