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Flashcards in The Electrocardiogram Deck (15):
1

QRS complex

initial ventricular activation

2

ST segment

plateau of the action potential

3

T wave

repolarization

4

P wave

atrial depolarization - right atrium first then left atrium

sinus node is before the P wave but is too small to be recorded

5

PR interval

from initiation of atrial to initiation of ventricular activation

6

QT interval

sum of total AP in the ventricles

7

Bipolar lead I

left arm (LA) minus right arm (RA) (left arm positive)

8

Bipolar lead II

left leg (LL) minus right arm (RA) (LL positive)

9

Bipolar lead III

left arm (LL) minus LA (LL positive)

10

Which leads are the best to see P waves?

II and VI

11

Which leads are the best to see the anterior part of the left ventricle?

leads V1 - V4

12

Which leads are the best to see the lateral part of the left ventricle?

leads I, aVL, V4 - v6

13

Which leads are the best to see the inferior part of the left ventricle?

leads II, III, and aVF

14

Burger's Triangle

a squalene triangle that describes the positioning of the leads in regards to the body and the heart

however, this makes calculations difficult, so an equilateral triangle is used instead

15

Einthoven's Triangle

a representation of the limb leads using an equilateral triangle to make calculations easier