Biphasic Technology - Superior for VF

Superior for Defibrillation of Ventricular Fibrillation

The performance of the ZOLL Rectilinear Biphasic™ waveform (RBW) stands out again in defibrillation of ventricular fibrillation in the Electrophysiology Lab. Three separate clinical trials were conducted for three different biphasic waveforms-each was compared to the same common standard, monophasic damped sine (MDS) waveform (Figure 1). 

RBW VF FACT

The ZOLL RBW was the only biphasic waveform to demonstrate statistical superiority to a 200 J MDS shock at low energy settings-99% efficacy at 120 J.* Only 1 patient in the study required a second shock at 150 J to interrupt VF. Furthermore, the results of the RBW became even more significant when the patient population was segregated into just high impedance patients (greater than 90 ohms) - 100% first shock efficacy at 120 J for RBW vs. 63% first shock efficacy at 200 J for MDS (p=0.02) (Figure 2). 

Biphasic Results for VF (Figure 1)

FirstShockEfficacyVF.jpg

Mittal et. al. (Figure 2)
VF Figure 2 Mittal

Learn More about ZOLL's Rectilinear Biphasic Waveform: 

Principles of Electricity
More Current at 200J than other biphasic waveforms at 360J 
New Control for Patient Impedance
Optimal Duration for Defibrillation Shocks
Superior for Cardioversion of Atrial Fibrillation
Superior for Defibrillation of Ventricular Fibrillation
Superior for Defibrillation of Out-of-Hospital Cardiac Arrest 
Pediatric Biphasic Recommendations
Bibliography

*The data demonstrates the equivalent efficacy of low energy rectilinear biphasic shocks compared to standard high energy monophasic shocks for transthoracic defibrillation for all patients in VT/VF at the 95% confidence level.  The data also demonstrate the superior efficacy of low energy rectilinear biphasic shocks compared to standard high energy monophasic shocks in patients in VT/VF with high transthoracic impedance at the 90% confidence level.