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Flashcards in Unit 1 Deck (93)
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0

P wave duration

0.06-0.10

1

PR interval duration

0.12-0.20

2

QRS interval

0.06-0.11

3

What is the J point

Where QRS complex meets ST segment

4

QT interval

0.36-0.44

5

What does QT interval measure?

Time of ventricular depolarization and repolarization

6

What is the standard signal amplitude?

1.0 mV or 10 small vertical square

7

View of aVR

Atria and great vessels

8

View of aVL

Lateral wall of LV

9

View of aVF

Inferior wall of left ventricle

10

Anterior leads

V1-4

11

Lateral leads

I, aVL, V5-6

12

Inferior leads

II, III, aVF

13

A normal rate that suddenly accelerates to as rapid rate producing irregularity in the rhythm

Paroxysmal tachycardia

14

Patterned irregularities

Repeats itself in a cyclic fashion
-sinus dysrhythmia, second degree av block type 2

15

Totally irregular
-irregularly irregular

A fib

16

P wave amplitude

0.5-2.5mm

17

P wave amp >2.5

RAE

18

P pulmonale

RAE

19

P wave width >0.10s

LAE

20

P mitrale

LAE

21

Saw tooth pattern

Flutter waves; atrial flutter

22

Inverted P wave originates from?

Lower RA near the AV node, in the LA or the AV junction

23

Causes of tall QRS complexes

Ventricular hypertrophy, abnormal pacemaker, aberrantly conduct beat

24

Low voltage QRS

Obese patients, hypothyroid, pericardial effusion

25

PR interval denotes depolarization of

Heart from the SA node through the atria, AV node, and his-purkinje system

26

Shorter p waves occur when

The impulse originates in the atria close to the AV junction or in the AV junction
-through abnormal accessory pathways
-preexcitation

27

Delta wave

WPW

28

Longer PR interval

Usually AV block

29

Varying PR intervals

Wandering atrial pacemaker