Runaway Pacemaker Protection—or a Problem?

Poon, Kimble; Young, Charlie; Vakulenko, Marta; Gupta, Nigel

doi:10.1016/j.hrthm.2013.04.019

Cited by 2 publications

(2 citation statements)

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“…When the required pacing rate exceeds the RAP value, the RAP circuit prevents the pacemaker from delivering pacing pulses and so generates "exit block". The device continues to display ventricular pace markers on the ventricular channel but will deliver pacing pulses only when the RAP circuit timer has recovered [2]. When the device is initially manufactured the RAP value is at 132.3 bpm (reset value) and then is programmed typically to a nominal value of approximately 190 bpm.…”

Section: Discussionmentioning

confidence: 99%

“…When the device is initially manufactured the RAP value is at 132.3 bpm (reset value) and then is programmed typically to a nominal value of approximately 190 bpm. The RAP value is not reported by the device and can be altered when the memory is corrupted by electromagnetic interference [2]. The RAP value can only be reprogrammed via a password-protected engineering interface on the standard programmer, as performed in our case.…”

Section: Discussionmentioning

confidence: 99%

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An unusual case of upper rate behaviour

2016

Cardiovasc Med

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because of high-degree atrioventricular (AV) block due to Lyme Figure: Tracing A: ECG at exercise stress test with sudden onset of a 2:1 block and occasional appearance of late coupled beats with a different QRS morphology (most likely delayed afterdepolarisations) at a heart rate of 135 bpm. Tracing B: Pacing in VVI mode (maximum output of 7.5 volts and maximum pulse width of 1.5 milliseconds) with loss of 1:1 ventricular capture and onset of first 3:2 followed by 2:1 ventricular capture at heart rate of 140 bpm.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%