Cardiac Disorders and 12 Lead EKG Part 5 Flashcards Preview

Clinical Methods > Cardiac Disorders and 12 Lead EKG Part 5 > Flashcards

Flashcards in Cardiac Disorders and 12 Lead EKG Part 5 Deck (42):
1

Views the heart in a vertical plane is synonymous with what plane?

 frontal plane

2

In this frontal plane image, limb leads view heart’s electrical activity (depolarization & repolarization) moving in what directions (name in order) through this circle?

Q image thumb

up, down, right, and left 

3

What lead is this?

LA +

RA -

Angle of orientation is ___º

Lead I

0

A image thumb
4

What lead is this?

Legs +

RA -

Angle = ____º

Lead II

60

A image thumb
5

What lead is this?

legs +

 left arm -

Angle is ____º

III

120

A image thumb
6

What lead is this?

left arm +

other limbs -

Angle is ____º

aVL

-30

A image thumb
7

What lead is this?

RA +

Other limbs -

Angle is ___º

aVR

-150

8

What lead is this?

Legs +

Other limbs -

Angle is ___º

aVF

90

9

The 6 precordial leads arranged across chest in horizontal plane, views heart's electrial activity moving _______ and ______.

anteriorly & posteriorly

10

What lead is placed at 4th ICS right of sternum?

V1

11

What lead is placed at the 4th ICS left of sternum?

V2

12

What lead is placed at the 5th ICS in the midclavicular line?

V4

13

Lead V3 is placed where?

between V2 and V4

14

What lead is placed in the 5th ICS in the midaxillary line?

V6

15

Where is lead V5 placed?

between V4 and V6

16

Inferior leads are what 3 leads?

II

III

aVF

17

Left lateral leads are what leads? (4)

I

aVL

V5

V6

18

Anterior leads are what leads? (2)

V3

V4

19

Lead aVR is _____.

alone

20

Light lines on the EKG, small boxes are __ x___mm squares.

1x1

21

Dark lines, or large box on the EKG strip are ___x___ mm squares 

5 X 5

22

Small square distance = ____ sec

0.04

23

Large square distance= ____sec

 0.2 

24

Vertical axis on EKG strip is _____.

voltage

25

Horizontal axis or EKG strip is _____.

time

26

Each small square on y-axis is ___mV

0.1

27

Each large square on y-axis is ____mV.

0.5 mV

28

Atrial depolarization begins at SA node and is indicated on the EKG as ______.

P wave

29

___ wave

Vector of current flow points from R→L and inferiorly. 

P wave

30

The P Wave

Any lead that views the wave of atrial depolarization as moving toward it will record a ____ deflection (I, aVL, II, aVF, V5, V6)

positive 

31

The P Wave

As moving perpendicular to it will record a ____ wave (III V1)

biphasic 

32

The P Wave

As moving away from it will record a ______ deflection (aVR)

negative 

A image thumb
33

What represents the time from the start of atrial depolarization to the start of ventricular depolarization including delay in conduction from AV node?

PR Interval

34

PR interval =  ____-____seconds 

0.12 - 0.2 

35

Definition: The interventricular septum depolarizes left-to-right and a small negative deflection can be seen in: I, aVL, V5, and V6.

 

Septal Q-waves

36

Definition: Ventricular (LV) depolarization current vector points 0-90º.

Large positive R waves are seen in (I, II, III, aVL, aVF, V5, V6,) and negative R wave in aVR. *

Note: R wave progression in precordial leads.

QRS complex

37

This represents the time from the end of ventricular depolarization to the start of ventricular repolarization

ST segment

A image thumb
38

This represent repolarization that usually begins in the last area of the heart to have been depolarized.

T wave

39

What encompasses the time from the beginning of ventricular depolarization to the end of ventricular repolarization?

QT interval

40

QT duration is proportionate to what?

HR

41

What composes 40% of the cardiac cycle?

QT interval

A image thumb
42

What leads are interventricular septum leads? (2)

V1 and V2