Dräger Infinity Vista, Instructions For Use Manual, Page: 150 / 280

8-20 Infinity Vista VF6
8 ECG
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Pacemakers with Impedance-Derived Rate Response
These pacemakers emit pulses for the purpose of adjusting the pacer rate to the
patient’s respiration rate. The monitor may classify such impedance spikes as pacer
spikes and display them in very short, regular intervals superimposed on the patient’s
ECG. For patients with pacemakers, change the electrode placement until the
impedance spikes shrink in size or disappear.
Large Amplitude Pacer Pulses
Transcutaneous Electrical Nerve Stimulators (TENS)
TENS signals are similar to pacemaker spike signals and may be accidentally labeled
as such by the monitor.
WA R N I N G : S o m e pa c e m a k e r s , e s p e c i a l l y e x t e r n a l
pa c e m a k e r s , e m i t p u l s e s w i t h a m p l i t u d e s f a r e x c e e d i n g t h o s e
s h o w n i n t h e pa c e r p u l s e r e j e c t i o n ta b l e . T h e m o n i t o r m a y
m i s i n t e r p r e t s u c h p u l s e s a s v a l i d Q R S c o m p l e x e s a n d m a y
f a i l t o d e t e c t c a r d i a c a r r e s t .
WA R N I N G : Va l i d Q R S c o m p l e x e s f o l l o w i n g m i s l a b e l e d T E N S
s i g n a l s c o u l d b e r e j e c t e d . T h e r e s u l t m a y b e f a l s e a s y s t o l e o r
l o w h e a r t r a t e a l a r m s . I f T E N S s i g n a l s c o n t i n u e t o b e
i n t e r p r e t e d a s pa c e r s p i k e s , t u r n t h e pa c e r d e t e c t i o n o f f .