biphasic waveform


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biphasic waveform

An atypical 2-step—rather than single curve—pattern of clot formation, which is typical of disseminated intravascular coagulation (DIC), and detected by dynamic waveform analysis of changes in light transmission or absorption (LT/A), which occurs with coagulation. The biphasic waveform and gradient of the initial slope of the waveform correlate with the DIC’s severity or progression of clinical conditions.

biphasic waveform

A waveform used by some defibrillators that discharges energy in two phases (first positive, then negative). The shock applied by a biphasic defibrillator uses 30-40% less peak current at the same applied energy level than a monophasic defibrillator and is both less injurious to the heart and more likely to terminate ventricular fibrillation.
See also: waveform
References in periodicals archive ?
But more recent studies conducted during development of implantable cardioverter defibrillators (ICDs) showed that shock energy requirements are lower and success rates higher with biphasic waveforms, in which the current flows in one direction for the first half of the shock and then reverses direction.
Upper extremity arterial Doppler was obtained and showed biphasic waveforms with decreased pressures in the left brachial, radial, and ulnar arteries at rest.
Such active pectoral pulse generators, in combination with biphasic waveforms, result in marked reductions in DFT's and more stable thresholds long term (9, 11).