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16 terms

EKG

STUDY
PLAY
ectopic foci
sorces for the electrical impulse that triggers cardiac contraction that lie outside the SA node
can valvular defects in the heart be detected with a 12 lead EKG
no
what is suggested by an inverted T wave on the EKG
ischemia
what is the normal period of time for the PR interval
<.20 seconds
what parameter is measured on the vertical axis of the EKG paper
voltage
what structure paces a healthy heart
SA node
what structure serves as the backup pacemaker
AV node
Which wave represents the depolarization of the ventricles
QRS
which wave represents the repolarization of the ventricles
T wave
why is the electrical impulse temporarily delated at the AV node
so the ventricle can fill up
in what part of the cardiac conduction system does the electrical impulse travel most rapidly
purkinjie fibers
what condition is often associated with right axis deviation
copd with cor pulmonale
wht is the normal maximum length of the pwave
no more than 2.5mm high 3mm lng
what is the widith of the normal QRS
<0.12
what term is used to define the ability of certain cells to depolarize with out stimulation
automaticity
what physical/clinical conditions are associated with tachycardia
hr>100 anxiety fever hypovolemia and hypoxemia, side effect of medications