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2015 ; 4
(12
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Diagnostic Accuracy of Commercially Available Automated External Defibrillators
#MMPMID26627880
Nishiyama T
; Nishiyama A
; Negishi M
; Kashimura S
; Katsumata Y
; Kimura T
; Nishiyama N
; Tanimoto Y
; Aizawa Y
; Mitamura H
; Fukuda K
; Takatsuki S
J Am Heart Assoc
2015[Dec]; 4
(12
): ä PMID26627880
show ga
BACKGROUND: Although automated external defibrillators (AEDs) have contributed to
a better survival of out-of-hospital cardiac arrests, there have been reports of
their malfunctioning. We investigated the diagnostic accuracy of commercially
available AEDs using surface ECGs of ventricular fibrillation (VF), ventricular
tachycardia (VT), and supraventricular tachycardia (SVT). METHODS AND RESULTS:
ECGs(VF 31, VT 48, SVT 97) were stored during electrophysiological studies and
transmitted to 4 AEDs, the LifePak CR Plus (CR Plus), HeartStart FR3 (FR3), and
CardioLife AED-2150 (CL2150) and -9231 (CL9231), through the pad electrode
cables. For VF, the CL2150 and CL9231 advised shocks in all cases, and the CR
Plus and FR3 advised shocks in all but one VF case. For VTs faster than 180 bpm,
the ratios for advising shocks were 79%, 36%, 89%, and 96% for the CR Plus, FR3,
CL2150, and CL9231, respectively. The FR3 and CR Plus did not advise shocks for
narrow QRS SVTs, whereas the CL9231 tended to treat high-rate tachycardias faster
than 180 bpm even with narrow QRS complexes. The characteristics of the shock
advice for the FR3 differed from that for the CL9231 (kappa coefficient
[?]=0.479, P<0.001), and the CR Plus and CL2150 had characteristics somewhere
between the 2 former AEDs (?=0.818, P<0.001). CONCLUSIONS: Commercially available
AEDs diagnosed VF almost always correctly. For VT and SVT diagnoses, a
discrepancy was evident among the 4 investigated AEDs. The differences in the
arrhythmia diagnosis algorithms for differentiating SVT from VT were thought to
account for these differences.