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Sinoatrial arrest is a medical condition wherein the sinoatrial node of the heart transiently ceases to generate the electrical impulses that normally stimulate the myocardial tissues to contract and thus the heart to beat. It is defined as lasting from 2.0 seconds to several minutes. [1]
Sinus node dysfunction can also present with sudden sinus arrest with or without junctional escape, sinoatrial block, prolonged asystolic period followed by tachycardias, or tachycardia-bradycardia syndrome presenting as various atrial arrhythmias such as atrial fibrillation, flutter, tachycardia, or paroxysmal supraventricular tachycardia. [7] [5]
A sinoatrial block (also spelled sinuatrial block) [1] is a disorder in the normal rhythm of the heart, known as a heart block, that is initiated in the sinoatrial node.The initial action impulse in a heart is usually formed in the sinoatrial node (SA node) and carried through the atria, down the internodal atrial pathways to the atrioventricular node (AV) node. [2]
Atropine is often used as a first line treatment of a third-degree heart block in the presence of a narrow QRS which indicates a nodal block, but, may have little to no effect in an infra-nodal block. [11] Atropine works by reducing vagal stimulation through the AV node but will not be effective in those who have had a previous heart transplant ...
Within the sinoatrial node (SA node or Sinus node), where the heart's signals originate: Sinoatrial nodal blocks (often abbreviated "SA nodal block" or "SA block", sometimes written "Sinuatrial block") Within the atrioventricular node (AV node) Atrioventricular block (often abbreviated "AV nodal block", "AV block" or AVB). At and below the ...
Treatments may include physical maneuvers, medications, electricity conversion, or electro- or cryo-cautery. [ citation needed ] In the United States, people admitted to the hospital with cardiac arrhythmia and conduction disorders with and without complications were admitted to the intensive care unit more than half the time in 2011.
In sub-Saharan Africa, for example, where USAID oversees services including HIV prevention and treatment, girls and women ages 15 to 24 are three times more likely to contract the virus than boys ...
The sinoatrial node (also known as the sinuatrial node, SA node or sinus node) is an oval shaped region of special cardiac muscle in the upper back wall of the right atrium made up of cells known as pacemaker cells. The sinus node is approximately 15 mm long, 3 mm wide, and 1 mm thick, located directly below and to the side of the superior vena ...