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if the R-R intervals are all equal the rhythm is

regular
if the R-R intervals are not equal the rhythm is

irregular
p waves shows what kind of contraction

atrial contraction
atrial contraction is caused by the start of the impulse of the

SA Node
to get atrial contraction you have to have

atrial depolarization
what causes depolarization

switching of electrodes (Na+ and K+) pumps

(which carried the wave of current -- then causing depolarization which causes contraction
QRS complex shows what type of contraction

ventricular contraction or ventricular depolarization
t-waves shows what type of repolarization?

ventricular repolarization or relaxation
impulse starts at the SA node, which is created by

automaticity (pacemaker)
impule travels through the inner nodule pathways to the

AV node
then goes through the

bundle of his
into bundle branches, to the

perkinjie fibers
list all thats in the ATRIA

SA node -- inner nodule pathways -- AW node -- bundle of his
list all thats in the VENTRICLES

bundle branches and perkinjie fibers
normal ranges of a PR interval

.12 - .20 seconds
the PR intervals represents

SA node -- inner nodule pathways -- AV node -- through the end of the bundle of his
any problem at the PR interval shows what kind of problem

atrial problem
normal ranges of a QRS complex

.04 - .11 seconds
t-waves occurs in the

bundle branches and perkinjie fibers
if all p waves look identical and all are up right like they are suppose to be then they are most likely called

sinus = meaning it came from the SA node = sinoatrial node
if p waves dont look identicals then they are called

ectopic - which means anything else

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ekg

Updated

1/20/2011, 5:50:44 PM

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