EKG

Question 1

P waves present
R to R intervals vary with inspiration
Normal finding, usually in younger patients

Answer 1

Sinus arrhythmia

Question 2

P waves negative in inferior leads

P:QRS usually 1:1

Answer 2

Ectopic atrial rhythm

Question 3

Hallmark feature of ectopic rhythm?

Answer 3

Inverted P waves

Question 4

Irregularly irregular rhythm
R to R intervals vary without pattern
NO P waves

Answer 4

Atrial fibrillation

Question 5

Saw tooth P waves

Answer 5

Atrial flutter

Question 6

Regular tachycardia
Narrow QRS complex
Rate ~150bpm

Answer 6

Supraventricular tachycardia

Question 7

P-wave often inverted, may even be under or after QRS

Really slow heart rate

Answer 7

Junctional rhythm

Question 8

PR interval is >200msec but 1:1 conduction is maintained

Answer 8

First degree heart block

Question 9

intermittent dropped ventricular beats due to “block” in the AV node

Increasing PR interval, dropped beat, back to normal

Random, intermittent dropped beat with no PR elongation

Answer 9

Second degree heart block

Type I: Wenckebach

Type II

Question 10

Complete block in the AV node

Atrial and Ventricular rhythms are completely independent

Answer 10

Third degree heart block

Question 11

QRS interval should be less than

Answer 11

120ms

Question 12

How long should QT interval be?

Answer 12

Less than half of R to R interval

Question 13

Left bundle branch block key feature

Answer 13

Weak waves in leads V4-V6

Question 14

R in aVL greater than 11mV

S in V1 or V2 plus R in V5 or V6 greater than 35mV (7 BIG BOXES VERTICALLY)

Answer 14

Left ventricular hypertrophy

Question 15

ST elevation indicative of:

ST depression indicative of:

Answer 15

MI

Ischemia