Key result
Using an inferior vena cava anode for unipolar His-bundle electrograms yields a better signal-to-noise ratio than a chest skin patch, while a 50-500 Hz filter decreases His bundle amplitude (0.32 vs 0.38 mV; P<0.01).
Why the study?
Does anode location and filter setting affect the amplitude, duration, morphology, and signal-to-noise ratio of unipolar His-bundle electrograms in patients undergoing EP studies?
Does anode location and filter setting affect the amplitude, duration, morphology, and signal-to-noise ratio of unipolar His-bundle electrograms in patients undergoing EP studies?
Absolute Event Rate: 0.32% vs 0.38%
p-value: p=<0.01
Using an electrode catheter in the inferior vena cava as the anode provides the optimal signal-to-noise ratio for recording unipolar His-bundle electrograms.
No takes yet. Share an insight, caveat, or question.
May enhance unipolar His-bundle recording in EP labs; leaves open effects on mapping accuracy or outcomes.
Kadish et al. (1989) studied Undergoing clinical electrophysiology studies (n=10). Inferior vena cava anode and 50-500 Hz filter setting vs. Chest wall anode and 0.05-1000 Hz filter setting was evaluated on His bundle electrogram amplitude (mV) (p=<0.01). Using an inferior vena cava anode for unipolar His-bundle electrograms yields a better signal-to-noise ratio than a chest skin patch, while a 50-500 Hz filter decreases His bundle amplitude (0.32 vs 0.38 mV; P<0.01).
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