Which of the following correctly reflects the ECG criteria for a sinus rhythm?
A) More P waves than QRS complexes
B) P waves that look alike and upright in lead II, one before each QRS complex
C) Irregular atrial and ventricular rhythm
D) PR interval exceeding 0.20 second

Question

Quizplus · Accepted Answer

Characteristics of sinus rhythm:
Rhythm R-R and P-P intervals are regular
Rate 60 to 100 beats/min
P waves Positive (upright) in lead II; one precedes each QRS complex; P waves look alike
PR interval 0.12 to 0.20 second and constant from beat to beat
QRS duration 0.11 second or less unless abnormally conducted

Which of the Following Correctly Reflects the ECG Criteria for a Sinus