Background Sinus node dysfunction because of abnormal impulse generation or sinoatrial
conduction block causes bradycardia that can be difficult to differentiate from high …

Introduction To evaluate the clinical presentation, diagnosis, treatment, and outcomes of a
group of dogs with sinoatrial node abnormalities. Animals Ninety-three client-owned dogs at …

Using 24-h ambulatory electrocardiography, the RR intervals of all beats were determined in
a West Highland white terrier with sick sinus syndrome characterized by long sinus pauses …

We have applied a mathematical function to model sinus node recovery after atrial pacing at
different cycle lengths in 13 autonomically denervated, anesthetized canines. This model …

Background An important consideration for the treatment of sick sinus syndrome (SSS) lies
in the function of the atrioventricular (AV) node because most patients with SSS retain the …

Sinus node recovery time (SNRT) and sinoatrial conduction time (SACT) were determined in
each of 28 children. Eighteen children (ages 2 to 14 years) had electrocardiographically …

Background: It is known that autonomic nerve activity controls the sinus rate. However, the
coupling between local nerve activity and electrical activation at the sinoatrial node (SAN) …

REIFFEL, JA, et al.: The Duration of the Sinus Node Depolarization on Transvenous Sinus
Node Electrograms Can Identify Sinus Node Dysfunction and Can Suggest Its Severity …

Martin Flack, a medical student, was the first to discover the sinoatrial (SA) node in the early
1900s. The SA (sinus) node represents a cluster of myocytes with pacemaker activity. Under …

Sinus node dysfunction can be evaluated by invasive and noninvasive means. In this article,
invasive testing of sinus node function and its clinical utility are reviewed. Sinus recovery …