The Only EKG Book You'll Ever Need (Chapter 2) Flashcards Preview

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1

3 ways an EKG can change in a hypertrophied or enlarged heart

1. increase in DURATION of waves
2. increase in AMPLITUDE of waves
3. mean electrical vector (or electrical AXIS) may shift

2

3 ways an EKG can change in a hypertrophied or enlarged heart

1. increase in DURATION of waves
2. increase in AMPLITUDE of waves
3. mean electrical vector (or electrical AXIS) may shift

3

if the QRS complex is POSITIVE in leads I and avF, the QRS axis must be ____

NORMAL

4

if the QRS complex in either lead I or lead avF is NOT predominantly POSITIVE, the QRS axis ____

does NOT lie between 0 and 90 degrees, and is NOT normal

5

normal axis =

POSITIVE leads I and avF

6

left axis deviation =

positive lead I, negative lead avF

7

right axis deviation =

negative lead I, positive lead avF

8

extreme right axis deviation =

NEGATIVE leads I and avF

9

normal P wave duration

10

normal P wave deflection, whether positive or negative, should not exceed

2.5mm

11

the first and second parts of the P wave represent, respectively

right atrial depolarization and left atrial depolarization

12

virtually all of the info needed to assess atrial enlargement can be found in which leads?

leads II and V1

13

if the QRS complex is POSITIVE in leads I and avF, the QRS axis must be ____

NORMAL

14

if the QRS complex in either lead I or lead avF is NOT predominantly POSITIVE, the QRS axis ____

does NOT lie between 0 and 90 degrees, and is NOT normal

15

normal axis =

POSITIVE leads I and avF

16

left axis deviation =

positive lead I, negative lead avF

17

right axis deviation =

negative lead I, positive lead avF

18

extreme right axis deviation =

NEGATIVE leads I and avF

19

normal P wave duration

less than 120ms

20

normal P wave deflection, whether positive or negative, should not exceed

2.5mm

21

the first and second parts of the P wave represent, respectively

right atrial depolarization and left atrial depolarization

22

virtually all of the info needed to assess atrial enlargement can be found in which leads?

leads II and V1

23

how do you diagnose right atrial enlargement?

P waves w/ amplitude greater than 2.5mm in inferior leads (II, III, and avF)

24

what is P pulmonale?

right atrial enlargement in leads II and V1, often d/t severe lung disease

25

how do you diagnose left atrial enlargement?

terminal portion (left atrial) of P wave should drop at least 1mm below isoelectric line in lead V1