Abstract P161: Diagnostic Performance of a New Multifunctional Electrocardiograph (radarcircTm) during Uninterrupted Chest Compressions in Cardiac Arrest Patients
[Background] Recently, the importance of external chest compressions during cardiopulmonary resuscitation is more emphasized especially often the International Consensus meeting in 2005. However, during a cardiac rhythm check, chest compression needs to be discontinued to avoid ECG artifacts. A new multifunctional electrocardiograph (Radarcirc™) has been developed for use in clinical settings that are subject to sudden impacts and vibrations. In the present study, we compared the performances of the multifunctional electrocardiograph and a conventional electrocardiograph in the cardiopulmonary resuscitation (CPR) setting.
[Methods] We conducted non-randomized and sequential self-controlled study at the single center. CPR was performed on 41 out-of-hospital cardiac arrest patients. We measured cardiac rhythm with chest compression, and rhythm without chest compression during a rhythm check, using lead I and II recordings by both a conventional electrocardiograph and a multifunctional electrocardiograph. For each waveform, we assessed the diagnostic performance using area under the receiver operating characteristic curve.
[Results] We obtained 50 ECG tracings, of which 32 cases were asystole, 13 were pulseless electrical activity (PEA), and 5 were ventricular fibrillation (VF). Areas under the receiver operating characteristic curve for VF were 0.448 (95% CI 0.274–0.622) for lead II by the conventional electrocardiograph, and 0.797 (95% CI 0.684–0.910) for lead II by the multifunctional electrocardiograph.
[Conclusion] The multi-functional electrocardiograph provided significantly higher accuracy to predict rhythm during chest compressions than conventional one. Further study is necessary to confirm on efficiency of this multifunctional electrocardiograph especially for VF cases.