ECG

Question 1

Atrial fibrillation features

Answer 1

Tachycardia >150
Irregular irregular
No P waves
>100 is RVR

Question 2

Atrial flutter features

Answer 2

> 300
Saw tooth or inverted p waves in inferior leads
2:1 P to QRS ratio
Narrow QRS complex

Question 3

First degree AV block

Answer 3

Prolonged PR but QRS for every P wave

Question 4

Second degree AV block

Answer 4

Mobitz I: progressive longer PR interval until skipped QRS

Mobitz II: constant PR interval until skipped QRS

Question 5

Third degree AV block

Answer 5

No association between P and QRS
More P than QRS

Question 6

Ventricular Tachy

Answer 6

Regular
Broad complex
Monomorphic QRS (unless torsades)

Question 7

Ventricular fibrillation

Answer 7

No clear P or QRS
Chaotic uncoordinated electrical activity
Amplitude decrease with longer duration until eventual asystole

Question 8

Causes of ST elevation

Answer 8

MI
Pericarditis
LBBB
LVH
Benign early repolarization

Question 9

Lateral leads

Answer 9

I
AVL
V5-6

Question 10

Interior leads

Answer 10

II, III
AVF

Question 11

Anterior septal leads

Answer 11

V1-4

Question 12

Posterior leads

Answer 12

V7-9 (needs 15 lead)