Which of the following statements about sinus dysrhythmia is true?
A)The PR interval varies along with the heart rate.
B)The QRS duration varies along with the heart rate.
C)The intervals between the P-P and R-R waves vary.
D)The P waves are usually inverted in deflection.

Question

Quizplus · Accepted Answer

Sinus dysrhythmia is a type of irregular heartbeat where the rhythm of the heart varies with respiration, causing variations in the intervals between the P-P and R-R waves. The PR interval and QRS duration remain constant. The P waves are typically upright in lead II.

Which of the Following Statements About Sinus Dysrhythmia Is True