Which of the following is true about a patient diagnosed with sinus arrhythmia?
A) The heart rate varies, dependent on vagal tone and respiratory pattern.
B) Immediate treatment is essential to prevent death.
C) Sinus arrhythmia is not well tolerated by most patients.
D) PR and QRS interval measurements are prolonged.

Question

Quizplus · Accepted Answer

Sinus arrhythmia is a cyclical change in heart rate that is associated with respiration.The heart rate increases slightly during inspiration and slows slightly during exhalation because of changes in vagal tone.The ECG tracing demonstrates an alternating pattern of faster and slower heart rate that changes with the respiratory cycle.Interval measurements are normal.This rhythm is tolerated well,and no treatment is required.The PR and QRS intervals are normal.

Which of the Following Is True About a Patient Diagnosed