EKG II Flashcards Preview

Clinical Methods Final > EKG II > Flashcards

Flashcards in EKG II Deck (17):
1

why do arrhythmias happen

Mnemonic: HIS DEBS
H-Hypoxia:
I-Ischemia and Irritability:
S-Sympathetic stimulation:
D-Drugs:
E-Electrolyte Disturbances:
B-Bradycardia
S-Stretch:

2

which lead yields the most information?

II

3

How to calculate rate

find R wave on a bold line
300, 150, 100, 75, 60, 50 on following bold lines
rate is determined by location of next R wave in relation to the numbers above

4

How long in a normal PR interval?

0.12 - 0.20 s

5

how long is normal QRS complex?

0.04 - 0.12 s

6

what are the 4 types of arrythmia

1. sinus origin
2. ectopic
3. conduction blocks
4. preexcitation syndromes

7

how is a junctional escape rhythm denoted?

No P waves (no atrial depolarization)

8

what is rate of supraventricular tachycardia?

150-250

9

how do you slow supraventricular tachycardia?

vagus response - Baroreceptors sense changes in pressure which cause reflex response from brain to heart via vagus n. to slow HR.

10

how fast is the atrial rate in atrial flutter?

250 - 350

11

how does carotid massage effect a. flutter?

increase the block (i.e. from 2:1 to 4:1)

12

How fast is atrial rate in atrial fibrilation?

350 - 500

13

what is distinct about multifocal atrial tachycardia?

3 different P wave morphologies
irregular rate 100 - 200
carotid massage has NO effect

14

when is a multifocal atrial tachycardia a "wandering atrial pacemaker"?

rate < 100

15

what is difference between Paroxysmal atrial tachy (PAT) vs SVT?

Warm up and cool down with PAT and Carotid massage will help PSVT but not PAT
rate 100 -200

16

what is rate in V. Tach?

120 - 200

17

Most frequently encountered arrhythmia in adults who experience sudden

V. Fib