Digital Simulating A Wave Shape Of Current Impulse Appearing On The Heart During Defibrillation

Abstract

Y ugosl a v i a SUMMARY I n t h i s w o r k . d e f i b r i l l a t i o n of t h e h e a r t has been a n a l y s e d by impedance model of human body. The p r o c e s s of d e f i b r i l l a t i o n w a s s i m u l a t e d on a personal computer and it w a s o b t a i n e d a w a v e s h a p e of e l e c t r i c c u r r e n t i mpul se appear i ng on t h e h e a r t d u r i n g def i br i 11 a t i on. The a n a l y s i s w a s done i n 2 d i f f e r e n t p o s i t i o n s of def i b r i 11 ator electrodes. t h e ti m e analysis of d e f i b r i l l a t o r impulses on o t h e r p a r t s of t h e body shows t h e e x i s t e n c e of c u r r e n t and v o l t a g e i n t h e s u r r o u n d i n g s of h e a r t . so w e have t o b e v e r y c a r e f u l d u r i n g d e f i b r i l l a t i o n . T h i s a r t i c l e p o i n t s t o an u r g e n t need for t h e r e d u c t i o n of t r a n s i e n t r e s i s t a n c e between s k i n and d e f i b r i l l r t o r electrodes up t o lowest p o s s i b l e l i m i t because of j o u l e lossrs a p p e a r i n g h e r e . The t i m e a n a l y s i s of impulses shows t h a t w e have t o t a k e i n c o n s i d e r a b l e i n f l u e n c e on t h e w a v e shape of impulses and on v o l t a g e a p p e a r i n g on el ect r odes def i br i 11 a t i on, rrspect i vel y.