ECG

Question 1

prolonged p wave

Answer 1

intra-atrial conduction delay

Question 2

prolonged PR interval

Answer 2

AV block

Question 3

prolonged QRS duration

Answer 3

intra-ventricular conduction delay

Question 4

prolonged QT interval

Answer 4

delayed depolarization

Question 5

normal p wave duration

Answer 5

0.12 sec

Question 6

normal PR interval duration

Answer 6

0.12-0.20 sec

Question 7

normal QRS duration

Answer 7

0.04-0.10 sec

Question 8

sinus arrhythmia

Answer 8

heart rate accelerates w/ inspiration and shows w/ expiration

Question 9

premature atrial contration leads

Answer 9

II, III, AVF

Question 10

wandering atrial pacemaker

Answer 10

benign rhythm

pacemaker shifts between SA and AV node.

P haves are sometimes inverted.

Question 11

premature junctional beat/junctional premature complex

Answer 11

normal QRS, often absent or inverted P wave.

Question 12

junctional escape beat

Answer 12

beat right after prolonged pause. looks just like junctional premature complex but happens after pause. normal QRS, inverted or absent P wave.

Question 13

sinus arrhythmias

Answer 13

1. sinus tach/sinus brady
2. sinus arrhythmia
3. sinus arrest/sinus exit block
4. asystole
5. escape beats

Question 14

ectopic rhythms

Answer 14

abnormal rhythms that arise from somewhere other than the sinus node

Question 15

re-entrant rhythms

Answer 15

disorder of impulse transmission. re-entrant circuit is when a signal travels via a different pathway because normal pathway isn’t conducting quickly enough. often due to damage by ischemia or fibrosis.

Question 16

four questions to ask yourself to determine if arrhythmia is present

Answer 16

1. normal P waves?
2. QRS complexes narrow?
3. is there a P for each QRS?
4. is the rhythm regular?

Question 17

supraventricular arrhythmias

Answer 17

1. atrial premature beat
2. junctional premature beat
3. paroxysmal supraventricular tachy
4. atrial flutter
5. atrial fibrillation
6. multifocal atrial tachycardia
7. paroxysmal atrial tachy