Sa

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Related to sinoatrial: sinoatrial block

SA

The two-character ISO 3166 country code for SAUDI ARABIA.

Sa

1. ISO 3166-1 alpha-2 code for the Kingdom of Saudi Arabia. This is the code used in international transactions to and from Saudi bank accounts.

2. ISO 3166-2 geocode for Saudi Arabia. This is used as an international standard for shipping to Saudi Arabia. Each Saudi province has its own code with the prefix "SA." For example, the code for the Province of Riyadh is ISO 3166-2:SA-01.

3. An abbreviation for a number of corporate structures, including Sociedad Anonima (Spanish) and Societe Anonyme (French).
References in periodicals archive ?
SAB in humans is believed to be caused by a block of conduction within the sinoatrial junction while the sinus node itself functions normally (Chung 1983).
A Parafilm patch coated with Dil was placed over the sinoatrial node and sealed with tissue glue.
Richard Robinson and his colleagues at Columbia and Stony Brook Universities highlight the fact that the body's own natural pacemaker, called the sinoatrial (SA) node, is extremely vulnerable to damage during a heart attack, often leaving the patient with a weak, slow or unreliable heartbeat.
Heart rate variability (HRV) is a noninvasive and quantitative marker of cardiac autonomic function that reflects the regulation of the sinoatrial node by the sympathetic and parasympathetic branches of the autonomic nervous system [Task Force of the European Society of Cardiology and the North American Society of Pacing and Electrophysiology (Task Force) 1996].
The possible mechanisms involved in this phenomenon include arterial baroreceptor-mediated changes in vagal tone, activation of the Bainbridge reflex by the ventricular contraction, mechanical traction on the atria, and perhaps an increase in blood flow to the sinoatrial node during ventricular systole.
f] current ("funny" current) in the sinoatrial node, the body's cardiac pacemaker.
HRV describes variations in both instantaneous heart rate and RR intervals, and can reflect the coupling between the autonomic nervous system and the sinoatrial node.
Bradycardia, first to third degree atrioventricular (AV) conduction block and sinoatrial node block during apneas have been reported in OSA patients.
Patients with sinus node disease are at risk for severe sinus bradycardia or sinoatrial block.
Sinoatrial nodal artery to right atrium fistula after myxoma excision.
Because of their pharmacologic action, cholinesterase inhibitors have vagotonic effects on the sinoatrial (SA) and atrioventrical (AV) nodes, leading to bradycardia and AV block.