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Beep Detection Technique for Immediate Documentation of R Wave Sensing by an Implanted Defibrillator
Author(s) -
BERNSTEIN ALAN D.,
NEGLIA DONNA L.,
PARSONNET VICTOR
Publication year - 1993
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.1993.tb01646.x
Subject(s) - medicine , detector , envelope detector , chart , amplifier , signal (programming language) , microphone , acoustics , instrumentation (computer programming) , envelope (radar) , electrical engineering , telecommunications , computer science , bandwidth (computing) , physics , engineering , statistics , mathematics , sound pressure , programming language , operating system , radar
A technique is described for follow‐up clinic evaluation and documentation of R wave detection by an implanted defibrillator that emits audible tones upon magnet application whenever an R wave or other signal is sensed. A circuit comprising an electrets microphone, an instrumentation amplifier, a high‐pass filter, and an envelope detector is used to generate a signal that may be plotted together with a surface‐lead electrocardiogram on a two‐channel strip‐chart recorder. The resulting plot documents the sensing function of the implanted device and serves as an indication of optimal magnet position. Alternatively, the beep detector output could be used to trigger the inscription of fiduciary markers on a single‐channel strip‐chart recorder equipped with an auxiliary input for this purpose.