Independent Noise Test With CIS Model 6

Signal Noise Reduction on Electrophysiology Amplifier utilizing Clear Image Scientific Model 6

-- Test Conducted at Deborah Heart And Lung, Browns Mills NJ.

Participants:  Pedram Kazemian MD FACC,  Raffaele Corbisiero MD FACC,  George Giacono RN,  Gary Chamberlain REMS, David Muller RN.

Background: Noise on intracardiac recording systems has been a consistent problem since the inception of Electrophysiology Labs. External environmental sources and equipment is often a source of noise due to RFI and EMI emission. Isolating equipment is difficult due to the wide variety of equipment used during a range of different procedures.

Objective:  We compared signal quality with and without the use of the Clear Image Scientific Model 6 to compare noise in a real-world setting (CIS inc. is located Poulsbo, WA).

Methods: After witnessing a consistent reduction in noise when using the CIS Model 6 over a period of time, we recorded a patient undergoing an RF ablation with catheters in place. The signal noise amplitude was recorded on both surface and intracardiac electrogram (EGM)s with the CIS Model 6  in place. With catheters in still in place, the amplifier was rebooted after the CIS M6 was removed and the measurements were repeated with the amplifier plugged into a common outlet.

Results: With the CIS Model 6 in place, surface ECG baseline noise amplitude was measured at 0.009 with the gain/filter Low/High/Notch set to 128/1Hz/25Hz/60Hz respectively and for the EGMs 0.010 with the gain/filter Low/High/Notch set to 128/30Hz/250Hz/60Hz respectively. Upon repeating without the CIS Model 6, ECG baseline noise amplitude was measured at 0.022 with the gain/filter Low/High/Notch set to 128/1Hz/25Hz/60Hz respectively and for the EGMs 0.016 with the gain/filter Low/High/Notch set to 128/30Hz/250Hz/60Hz respectively.

Conclusion:  The CIS Model 6 reduced baseline noise by 144% on the Surface and 37% on the EGM.

Results - left with CIS Model 6, right without