ECGs

Question 1

Lengths of:
P-wave
PR interval
QSR complex

Answer 1

P-wave <0.08
PR interval 0.12-0.20
QSR complex <0.12

Question 2

Causes of heart blocks?

Answer 2

Fibrosis of conducting system
CHD
Drugs- beta-blockers, dogoxin

Question 3

First-degree heart block classification?

Answer 3

Prolonged PR interval (>0.20s/ 200ms)

Question 4

Second degree (Mobitz Type 1/Wenckebach) heart block classification?

Answer 4

Progressive PR prolongation until a dropped beat

Question 5

Second degree (Mobitz Type II) heart block classification?

Answer 5

No PR prolongation followed by a randomly dropped beat

Question 6

Third degree heart block classification?

Answer 6

Complete AV dissociation, with independent atrial and ventricular rates

Question 7

Examples of narrow complex tachycardias?

Answer 7

Sinus tachycardia
Atrial fibrillation
Atrial flutter
SVT

Question 8

Examples of broad complex tachycardia?

Answer 8

Ventricular tachycardia
Ventricular fibrillation
SVT with BBB