ECG Findings

Question 1

Normal PR Interval

Answer 1

< 200 msec

Question 2

Normal QRS

Answer 2

< 120 msec

Question 3

Normal QT Interval

Answer 3

< 440 msec

Question 4

Wolff-Parkinson White

Answer 4

Delta waves (at start of QRS) from earlier ventricle depolarization thru accessory pathway

Shorter PR interval

Question 5

A fib

Answer 5

Absent P waves

irregularly spaced QRS complexes

Question 6

Atrial Flutter

Answer 6

Rapid succession of back-to-back p waves (saw-tooth)

Question 7

V Fib

Answer 7

totally erratic

Question 8

First Degree AV Block

Answer 8

Prolonged PR (>200)

Question 9

Second Degree AV Block (type 1 and 2)

Answer 9

Type 1 - progressively longer PR interval then dropped QRS

Type 2 - dropped QRS not preceded by prolonged PR interval

Question 10

Third Degree AV Block

Answer 10

Atria and ventricle depolarization are totally independent

P waves have 1 rate and QRS complexes have another rate

Atria rate&raquo_space; ventricle rate

May see p waves on QRS or on a T wave

Question 11

Angina

Answer 11

ST depression due to hypoxia (also seen in NSTEMI)

Question 12

STEMI

Answer 12

ST elevation

Q waves

Question 13

Acute Pericarditis

Answer 13

Widespread ST elevation

and/ or PR depression

Question 14

Hypokalemia

Answer 14

U wave (after T wave)

Question 15

Hyperkalemia

Answer 15

Peaked t waves