ELECTROCARDIOGRAM

通報

問題一覧

graphic display of the hearts electrical activity

electrocardiogram

electrocardiogram was introduced by________a dutch physiologist in the early 1900s

willem einthoven

function as a voltmeter detecting and recording the changes in voltage generated by the depolarization and repolarization of the heart cells

ecg machine

adhesive pads containing a conductive substance in the center that is applied to the patient's skin

electrodes

conductive media of the _______conduct skin surface voltage changes through wires to a cardiac monitor

electrodes

applied at a specific location on the patient's chest wall and extremities view the heart electrical activity from different angles and plane

electrodes

to minimize distortion or artifacts be sure the_____________in the center of the electrode is not try and avoid placing the electrodes directly over a bony areas

conductive jelly

what are the types of electrodes

clamp, bulb, snap

it is the end of a monitoring cable attached to the electrodes and the other to an ecg machine

lead wire

a record of electrical activity

leads

fluctation in voltage differences between positive and negative electrodes

leads

records the average current flow at a specific time in a portion of the heart allows for the viewing of the hearts electrical activity in the frontal and horizontal planes

leads

what are the standard limb leads

leads I, II, III

what are the augmented limb leads

leads avr, avl, avf

a leads that has a positive and negative electrodes

bipolar lead

record the difference in electrical potential between two selective electrodes

six leads

positive electrode of lead I

positive electrode of lead II and III

record the difference in electrical potential between the LA (+) and RA(-) electrodes

LEAD I

views the lateral surface of the left ventricle

lead 1

record the difference in electrical potential between the LL (+) and RA(-) electrodes

lead 2

views the inferior surface of the left ventricle

lead 2

records to difference in electrical potential between the LL(+) and LA(-) electrodes

lead 3

waveforms observed in this lead are usually positive

lead 3

views the inferior surface of the left ventricle

lead 3

imaginary line that joins the positive and negative electrodes of a lead

axis

access of the three limb leads- form an equilateral triangle with the heart at the center

einthoven triangle

a way of showing that the two arms and the left leg form apices of a triangle surrounding the heart

einthoven triangle

record measurements at a specific electrodes with respect to a reference electrode

augmented limb leads

frank norman wilson and colleagues use the term central terminal to describe the reference point that is the average of the limb leads electrical potential

augmented limb leads

fuse the heart from the right shoulder positive electrode

avr

the forgotten lead does not view any single surface of the heart

avr

views the right arm and the left leg with the view being from the left arm and oriented to the lateral wall of the left ventricle

avl

waveforms of serving sleep are usually positive but maybe byphasic

avl

combines views from the right arm and the left arm towards the left leg

avf

views the inferior surface of the left ventricle from the left leg

avf

waveforms of serve in this lead are usually positive but may be byphasic

avf

six test leads view the heart in the horizontal plane

horizontal plane leads v1-v6

allows a view of the front and left side of the heart

horizontal plane leads

lead v7

posterior axillary line

lead v8

angle of the scapula

lead v9

over the left border of the spine

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