ECG Rhythms UPDATED Exam Questions and CORRECT Answers

ECG Rhythms UPDATED Exam Questions
and CORRECT Answers
Asystole - CORRECT ANSWER - Rhythm: not present
Rate: absent
P Wave: absent
PR Interval: absent
QRS: absent


Atrial Fibrillation - CORRECT ANSWER - Rhythm: irregular
Rate: Very fast (> 350 bpm) for Atrial, but ventricular rate may be slow, normal or fast
P Wave: Absent - erratic waves are present
PR Interval: Absent
QRS: Normal but may be widened if there are conduction delays


Atrial Flutter - CORRECT ANSWER - Rhythm: Regular or irregular
Rate: Fast (250-350 bpm) for Atrial, but ventricular rate is often slower
P Wave: Not observable, but saw-toothed flutter waves are present
PR Interval: Not measureable
QRS: Normal (0.06-0.10 sec)


Bundle Branch Block - CORRECT ANSWER - Rhythm: regular
Rate: the underlying rate
P Wave: normal
PR Interval: Normal (0.12-0.20 sec)
QRS: Wide (>0.12 sec)


First-Degree Block - CORRECT ANSWER - Rhythm: Regular

, Rate: The underlying rate
P Wave: Normal
PR Interval: Prolonged (>0.20 sec)
QRS: Normal (0.06-0.10 sec)


Ventricular Tachycardia

Monomorphic - CORRECT ANSWER - Rhythm: Regular
Rate: Fast (100-250 bpm)
P Wave: Absent
PR Interval: Not measurable
QRS: Wide (>0.10 sec), bizarre appearance


Normal Sinus Rhythm - CORRECT ANSWER - Rhythm: regular
Rate: Normal (60-100 bpm)
P Wave: Normal (positive & precedes each QRS)
PR Interval: Normal (0.12-0.20 sec)
QRS: Normal (0.06-0.10 sec)


Ventricular Tachycardia

Torsade de Pointes - CORRECT ANSWER - Rhythm: Regular or irregular
Rate: Fast (100-300 bpm)
P Wave: Absent
PR Interval: Not measurable
QRS: Wide (>0.10 sec), bizarre looking


Ventricular Tachycardia

Polymorphic - CORRECT ANSWER - Rhythm: Regular or irregular
Rate: Fast (100-300 bpm)