High P-Waves And T-Waves; Pacemakers - Dräger Infinity Vista Instructions For Use Manual

8 ECG H
AND EART

High P-Waves and T-Waves

WA R N I N G : T h e m o n i t o r m a y c o u n t h i g h a m p l i t u d e P o r T-
w a v e s ( > 0 . 2 m V ) o f l o n g d u r a t i o n a s Q R S c o m p l e x e s . T h i s c a n
r e s u l t i n m i s s e d l o w - r a t e a l a rm s . I f t h e d i s p l a y e d h e a r t r a t e
( H R ) i s h i g h e r t h a n t h a t i n d i c a t e d b y t h e w a v e f o r m , t h e
m o n i t o r m a y b e c o u n t i n g u n u s u a l l y h i g h T- w a v e s o r P - w a v e s
a s Q R S c o m p l e x e s .
To obtain the most accurate heart rate count, do the following:
z Follow the steps outlined for pacemaker patients, selecting the lead with the
highest R-wave relative to the T-wave and the P-waves or both.
z If inaccurate counting continues, reposition the electrodes until you obtain an
acceptable waveform. In addition, Dräger recommends monitoring the heart
rate for these patients with an SpO

Pacemakers

Take special care in the evaluation of ECG waveforms.The monitor successfully
passed the pacer pulse rejection test. However, it is not possible to anticipate every
waveform characteristic.
WA R N I N G : I n c a s e o f u n c e r ta i n t y r e g a r d i n g t h e i n t e r p r e ta t i o n
o f Q R S c o m p l e x e s , t h e m o n i t o r i s d e s ig n e d t o e r r i n t h e
d i r e c t i o n o f f a l s e p o s i t i v e r a t h e r t h a n f a l s e n e g a t i v e a l a r m s .
I n pa c e d pa t i e n ts , Q R S c o m p l e x e s m a y n o t b e c o u n t e d ,
r e s u l t i n g i n f a l s e l o w - r a t e a l a r m s u n d e r t h e f o l l o w i n g
c ir c u m s ta n c e s :
z
F u s e d b e a ts a n d a s y n c h r o n o u s pa c e r s w h e n c ou p l i n g
i n t e r v a l s a r e + 1 0 t o – 9 0 m s .
z
7 0 0 m V pa c e r p u l s e s f o l l o w e d b y Q R S c o m p l e x e s
s m a l l e r t h a n 0 . 5 m V.
z
A s y n c h r o n o u s pa c e r p u l s e s w it h o v e r s h o o t .
8-18
R
ATE
Infinity Vista
sensor.
2
VF6