UW ECG Course

Question 1

LAD Ddx?

Answer 1

LVH
Inferior wall MI
left ant. Fascicular block

Question 2

RAD ddx?

Answer 2

RVH
Lateral wall MI
left post. Fascicular block

Question 3

How do you assess for LVH?

Answer 3

S wave in V1 OR V2

AND R wave in V5 or V6 > 35mm (small boxes) aka 7 big boxes

1 mm = 1 small box = .04s
5 mm = 1 large box = .2s

Question 4

How do you asses for RVH?

Answer 4

R wave > S wave in V1 and gets overall smaller as you move to V6

Question 5

What is the J point?

Answer 5

Point where ST elevation off the baseline

Question 6

What is a pathological Q wave?

Answer 6

Downward (negative deflection) very big

Question 7

PR interval should be less than?

QRS?

QT?

Answer 7

< .2

< .12

< .4 ?

Question 8

What is a 1st degree AV block?

Answer 8

PR > .2 but NO dropped beats

Question 9

What is a 2nd degree AV block (Wenckeboch)?

Answer 9

Increasing PR interval before dropped beat

Question 10

What is a 3rd degrees AV block?

Answer 10

Atrial rate independent of ventricular rate

No pattern bw P wave and QRS

Question 11

P waves with different sizes and PR intervals indicates what?

Seen in what?

Answer 11

Wandering pacemaker aka Multifocal atrial tachycardia

COPD

Question 12

What is a premature junctional complex?

Describe it

Answer 12

No P wave visible, occurs in the QRS

Narrow, comes from ventricles

Question 13

What is a RBBB?

Look where?

What else is required?

Answer 13

Rabbit ears, R, R’

V2

Inverted T wave

Question 14

What is a LBBB?

Look where?

Answer 14

Rabbit ears

V5, V6