This variation can occur with the respiratory cycle as the heart shifts in position with inspiration and expiration.

Sinus arrhythmia refers to a changing sinus node rate with the respiratory cycle, on inspiration and expiration. This is quite common in young, healthy individuals and has no clinical significance.

For the second consecutive two-year cycle, Gwynedd Mercy University’s Respiratory Care program has received the prestigious Apex Award from the American Association for Respiratory Care (AARC).