Sinus arrhythmia is a variation in the heart's sinus rhythm, usually caused by changes in a person's breathing cycle. It's a common finding, especially in children and young adults, and its ...

The rhythm is either sinus rhythm or not sinus rhythm. Sinus rhythm refers to the origination of the electrical activity coming from the sinus node — also known as the sinoatrial node ...

Amiodarone has greater efficacy than dronedarone for the maintenance of sinus rhythm in patients with atrial fibrillation (AF), whereas dronedarone has a better safety profile that could result in ...