ECG Practice Questions

Question 1

PR Interval time?

Answer 1

0.12 - 0.20

Question 2

QRS Duration

Answer 2

< 0.11 secs

Question 3

ST segment

Answer 3

measured 0.08 sec after j-point

Question 4

QT interval

Answer 4

0.30-0.44

Question 5

Regular rhythm, 60-100 bpm, upright P wave, PR interval 0.14 secs, QRS duration is 0.08, normal T wave

Answer 5

Sinus Rhythm

Question 6

Regular rhythm, less than 60 bpm, upright P wave, PR interval 0.14 secs, QRS duration is 0.08, normal T wave

Answer 6

Sinus Bradycardia

Question 7

Regular rhythm, 101-180 bpm, upright P wave, PR interval is between 0.12-0.20 secs, QRS duration is less than 0.11, normal T wave

Answer 7

Sinus tachycardia

Question 8

Irregular rhythm, 60-100 bpm, upright P wave, PR interval 0.14 secs, QRS duration is 0.08, normal T wave

Answer 8

Sinus arrhythmia

Question 9

Rhythm is regular with premature beats, 60-100 bpm, P waves are premature and differ from sinus P waves (flattened, notched, pointed, or lost in T wave), PR interval may be normal or prolonged, QRS usually 0.11 secs or less, may be wide depends on rhythm

Answer 9

Premature Atrial Contractions

Question 10

Regular Atrial Rhythm, Ventricular rhythm may be regular or irregular, Atrial rate 250-350 bpm, No identifiable P waves, saw-toothed flutter waves, no measurable PR interval, QRS less than 0.11 secs, T wave may or may not be identifiable

Answer 10

A flutter

Question 11

Irregular R to R, atrial rate 400-600 bpms, no identifiable P waves, chaotic, wavy line, No PR intervals, QRS less than 0.11

Answer 11

A fibrillation

Question 12

Regular rhythm, 40-60 bpm, May occur before, during or after the QRS; if visible P wave inverted in Lead II, If P wave before QRS, usually 0.12 sec or less; if no P wave before QRS, no PRI. 0.11 sec or less unless abnormally conducted, T wave assessed

Answer 12

Junctional Rhythm

Question 13

Regular rhythm, 150-250 bpm, p wave buried in preceding T wave and difficult to see, PR usually not possible to measure, QRS less than 0.11

Answer 13

Supraventricular Tachycardia (SVT)

Question 14

Regular with premature beats, rate within normal limits usually just depends on rhythm, P waves usually absent, no PR interval, QRS duration usually 0.12 secs or greater; wide and bizarre, T waves assessed (T waves usually in opposite direction of QRS complex)

Answer 14

Premature Ventricular Contractions

Question 15

Regular rhythm, 101-250 ventricular rate bpm, no p waves, no pr interval, qrs duration 0.12 secs or greater

Answer 15

Ventricular Tachycardia

Question 16

Regular or Irregular rhythm ventricular rate 150-300 bpm, no p waves, no pr interval, QRS duration 0.12 secs or greater

Answer 16

Torsade De Pointes

Question 17

Rapid, chaotic with no pattern of regularity, no rate, no p waves, no pr interval or qrs, no t waves, no st segment

Answer 17

Ventricular Fibrillation

Question 18

Reflects underlying rhythm but no pulse and rate is zero

Answer 18

Pulseless Electrical Activity (PEA)

Question 19

No ventricular rhythm; may have atrial rhythm, Zero rate, no p waves, no pr interval, absent qrs, no waves

Answer 19

Asystole

Question 20

Regular rhythm, rate usually normal but depends on underlying rhythm, normal p waves, prolonged or greater than 0.20 secs PR interval, qrs 0.11 or less, T waves assessed

Answer 20

First degree AV block