50% Tilt Biphasic Waveform

A biphasic waveform was introduced in the GEM II devices that requires 19% less energy for defibrillation. The waveform features a 50% tilt in each phase, compared to the 65% tilt used in earlier devices.

In a randomized paired comparison of 50/50% and 65/65% biphasic waveforms in 60 patients, the 50% waveform required 19% less energy for defibrillation in a Can + SVC-RV system.¹

References

1. Sweeney MO, Natale A, Volosin KJ, Swerdlow CD, Baker JH, DeGroot PJ. Prospective Randomized Comparison of a 50/50% Versus 65/65% Tilt Biphasic Waveform on Internal Defibrillation in Humans. J Am Coll Cardiol. 1998;31:373A.

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