Pacemaker Learning Package
Pacemaker Learning Package
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- Figure 14
| Pacemaker Learning Package
LH_ICU2016_Learning_Package_Pacemaker_Learning_Package 21 | P a g e It does this by transforming the programmed minimum heart rate into a time interval by dividing the programmed heart rate into 60,000 (the number of milliseconds in one minute) The result is the number of milliseconds that the pacemaker waits before deciding to deliver a stimulus. (6) For Example: pacing heart rate set at 60 pacemaker waits 60,000/60 or 1000ms after the last beat before it delivers the next stimulus if the heart has an intrinsic beat before 1000ms then pacemaker resets the lower rate timer and starts again at zero Figure 14: Paced intervals: Single chamber temporary pacing ppt 2001 INTERVAL DEFINITIONS Lower Rate interval( V-V) Lowest rate the pacemaker will pace the atrium in the absence of intrinsic atrial activity AV Intervals Initiated by a paced atrial event V-A Interval A pace-maker timing scheme that is based on the interval between a ventricular event and the subsequent atrial event (the VA Interval). This is in contrast to an atrial escape interval in which the interval between subsequent atrial events is fixed. (NOTE: This may make a difference when a patient has some intrinsic AV conduction. Since a sensed ventricular beat Ventricular paced interval Atrial paced interval Liverpool Hospital Intensive Care: Learning Packages Intensive Care Unit Pacemaker Learning Package LH_ICU2016_Learning_Package_Pacemaker_Learning_Package 22 | P a g e comes earlier than a paced one, and the pacemaker bases its lower rate on the atrial escape interval, the pacemaker rate from beat-to-beat could be slightly faster than the programmed rate. tải về 1.43 Mb. Chia sẻ với bạn bè của bạn:
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