Defibrillation efficacy of a newly developed automated external defibrillator in a swine ventricular tachycardia/fibrillation model.
- Author:
Jie HUI
1
;
Yun-Fei GU
;
Xiao-Mei WU
;
Zong-Cheng ZHU
;
Jian-Ping SONG
;
Xiang-Jun YANG
;
Zhi-Hua LIU
;
Ting-Bo JIANG
;
Zu-Xiang FAGN
;
Wen-Ping JIANG
Author Information
- Publication Type:Journal Article
- MeSH: Animals; Defibrillators; Disease Models, Animal; Electric Countershock; Equipment Design; Sensitivity and Specificity; Swine; Ventricular Fibrillation; therapy
- From: Chinese Journal of Cardiology 2009;37(9):845-848
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVEThe aim of this study was to evaluate the recognition and defibrillation efficiency of a newly developed automated external defibrillator (AED).
METHODVentricular tachycardia (VT)/ventricular fibrillation (VF) was induced by alternating current (50 Hz) through an electrode placed on apex of right ventricle in 23 anesthetized swine and recorded, recognized and defibrillated by a newly developed AED.
RESULTSA total of 96 VF was induced and 145 defibrillations were recorded. We analyzed available 167 electrocardiosignal with a total length of 103,740 seconds. The accuracy, sensitivity and the specificity of the AED on VT/VF recognition are 99.5%, 98.2% and 99.6%, respectively. The success rate of defibrillation was 33.4% which increased in proportion to defibrillation energy. The defibrillation threshold of energy is 29.10-116.91 (78.75 +/- 35.64) J, the defibrillation threshold of electric quantity is (0.11 +/- 0.04) C and the defibrillation threshold of voltage is (1216.67 +/- 260.87) V.
CONCLUSIONSThis newly developed AED has high sensitivity and the specificity on recognizing VT/VF. The lower success rate of defibrillation of this AED is associated with the low defibrillation energy during defibrillation which needs to be improved on further development.
