An ectopic rhythm is an irregular heart rhythm due to a premature heartbeat. Ectopic rhythm is also known as premature atrial contraction, premature ventricular contraction, and extrasystole. When ...

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, or SA node.

Here, we describe a large four-generation family with an autosomal dominant condition, comprising various types of CHD and low atrial rhythm, a unique phenotype not described before within a family. A ...

Background A routine sports evaluation identified constant alternation between a junctional and idioventricular rhythm in a 9-year-old child. During exercise testing, electrography demonstrated that ...

The 8 patients studied all had ectopic arrhythmias attributed to digitalis. Pronethalol was given by slow intravenous injection, a total dose of 100 mg. or up to 2.0 mg. per kilogram of body weight ...