Effects of short-duration transients on cardiac rhythm |
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| Authors: | O Z Roy A J Mortimer B J Trollope E J Villeneuve |
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| Affiliation: | (1) Medical Engineering Section, Division of Electrical Engineering, National Research Council of Canada, K1A 0R8 Ottawa, Canada |
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| Abstract: | Cardiac stimulation thresholds of short-duration large-amplitude electrical transients were studied. An isolated rabbit heart
model was used and transients were applied directly to the heart through electrodes of 1 mm2 and 1 cm2 surface area. A variety of oscillatory waveforms and pulse configurations were studied and indicated that, for transients
shorter than 100 μs, stimulation thresholds approach a constant charge-transfer density of 3·4 μC cm−2. |
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| Keywords: | Electrical safety Electrical transients Fibrillation thresholds Stimulation thresholds |
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