Acute Performance of a Right Ventricular Automatic Pacing Threshold Algorithm for Implantable Defibrillators

Gold, Michael R.; Dong, Yanting; Greer, Steve; Giudici, Michael; Haffajee, Charles I.; Lowy, Jonathan; Ellenbogen, Kenneth A.

doi:10.1111/j.1540-8159.2011.03286.x

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“…Capture management is a useful tool employed by pacemakers to regularly check ventricular thresholds in effort to optimize output voltage for battery longevity while maintaining consistent capture with an adequate safety margin . According the Medtronic Protecta XT CRT‐D user manual, when capture management is turned on in either adaptive or monitor mode, the device will perform threshold testing at 1:00 am daily (but such testing can be delayed if unstable rhythm events are detected).…”

Section: Discussionmentioning

confidence: 99%

Ventricular asystole in a CRT‐D device. What is the mechanism?

Reddy

Doshi

et al. 2019

Pacing Clinical Electrophis

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We present a case of an 89‐year‐old man with a left ventricular assist device and cardiac resynchronization therapy device (CRT‐D) who presented with multiple presyncopal events. On the night of admission, telemetry revealed a 13‐s pause with appropriately timed pacing spikes but with failure to capture, followed by intermittent ventricular contraction with different QRS morphology. What was the mechanism for his ventricular asystole?

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Section: Discussionmentioning

confidence: 99%