EKG Part 1
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This 4 page Class Notes was uploaded by Jessica Cox on Wednesday January 27, 2016. The Class Notes belongs to EP 3613 at Mississippi State University taught by Ben Abadie in Spring 2016. Since its upload, it has received 87 views. For similar materials see Exercise Electrocardiograph in Kinesiology at Mississippi State University.
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Date Created: 01/27/16
EKG Part 1 02/06/2016 ▯ 12 Lead EKG ▯ Where does it come from? 12 different views of the heart from the ekg- even though we only put 10 electrodes on the body ▯ Hexaxial Leads? Limb leads on the patient o Lead I,II,II, AVF, AVR, AVL Precordial Leads o V1,2,3,4,5,6 ▯ Hexaxial Leads Lead I,II,II o They are considered BIPOLAR LEADS o Leads with 2 OPPOSITE, physical poles/electrodes (+ and -) Lead I: o Positive on left arm o Negative on right arm o Ground on left foot Positive electrode = ”camera” ALWAYS goes + to – Lead II: o Positive on left foot o Negative on right arm o Ground on left arm Still positive to negative just looking at right arm Lead III: o Positive on left foot o Negative on left arm o Ground on right arm Looking at left arm first leads to be researched ▯ ▯ Augmented Leads AVR, AVL, AVF These leads don’t use two physical electrodes like I,II,II Created a (–) lead that goes in the middle of the body “the heart” Av- augumented voltage Unipolar leads- one physical electrode on the body which is placed on the body ▯ ▯ AVL- Positive electrode: Left Arm Negative electrode: Heart ▯ AVF- Positive: left foot Negative: right arm ▯ AVR- Positive: right arm (only one) Negative: left arm ▯ ▯ ▯ ▯ Precordial Leads Specific places on the chest Unipolar leads- physical positive, central terminal negative Looks @ the heart from the front around to the left side ▯ Placement: You want to place these in the right spot almost every time because it could change the interpretation of the lead EKG Strips Printed in either horizontal or vertical We mostly use HORIZONTAL o Printed left to right ▯ ▯ Lead I-left lateral ventricle ▯ Lead II- inferior wall ▯ Lead III- inferior wall ▯ AVR- right atrium.. ▯ AVL-left lateral ventricle ▯ AVF- inferior wall ▯ V1 and 2- septum ▯ V3- anterior left ventricle ▯ V4- anterior left ventricle ▯ V5 and 6- left lateral ventricle ▯ ▯ Rhythm Strip: helps interpret rhythm and normally either Lead II or Lead V1 ▯ ▯ What do they actually look at? ▯ I and AVL- left lateral ▯ II, III, AVF- inferior ▯ AVR- right lateral (confirm if the electrical conduction is going in the proper direction) ▯ V1 and V2- interventricular septum ▯ V3 and V4-anterior left ventricle ▯ V5 and V6- lateral surface of the left ventricle ▯ ▯ ▯ ▯
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