CVS physiology 3 - ecg Flashcards
what is the sll 1 lead
right rm to left arm
what is sll2 lead
right arm to left leg
what is the sll3 lead
left arm to left leg
what events are transmitted well to an ecg
fast events
what evens are not tranmited wiell
slower
what direction does a wave approaching depolorization have
upwards
what charge is the lead in the left arm and the right arm for sll1
left arm - postive
right arm negativ
what cahr is in the righ arm and left leg for sll2
right arm negative,
left leg postive
what charge is in the left leg and left arm for sll3
left leg - positive
left arm - negative
what will be seen for a depoloari wave from the right arm to the left leg, relative to the right arm
postive
what will be se for a depolarion wave from the left left to teh right arm
negative
what will we see if ther is a wave of repoloriastion approcting the left leg from the right arm, acoridng to teh righ arm
negative
what will we see if tehr is a repolarion wave coming form the left leg to the righ arm acoridng to th right arm
postive
what is the pr interval
disance bwetwen start of p wave and start of qrs (incudles p wave, does not include qrs(
what is the qt interval
disatnce form teh start of the qrs to the end of the t wave ( includes qrs wave and t wave)
what is the pr segment
distance from the distance btween p wave and qrs complex
what is an st segment
distance betwween s and t wave, non includive
what is the pr interval tell us
time from artial depolar to venticl depolation
what is a the normal time for a pr interval
0.12 to 0.2 seconds
what is the qrs tell us
time for the ventil to depolarise
What is a norla time fora qrs
.08 secionds
what is a qt interval
time for ventrilces to depolroisae and repoloreise
what is a norml time for a qt interval
.42 secionds
why can’t we see atrium repolorisation
as the qrs compelx happens at eh same time and is muce fater
