Atrial
Health dictionary
Untitled Document
Search :      

Art dictionary
Financial dictionary
Hollywood dictionary
Insurance dictionary
Literature dictionary
Real Estate dictionary
Tourism dictionary

 
  Atrial



Atrial

   Pertaining to the atria, the upper chambers of the heart, as in atrial fibrillation and atrial septal defect.

RELATED TERMS
--------------------------------------

Atria
The upper chambers of the heart that receive blood from the veins and pass it to the lower chambers of the heart.

Heart
The hollow, muscular organ responsible for pumping blood through the circulatory system.

Atrial
Pertaining to the atria, the upper chambers of the heart, as in atrial fibrillation and atrial septal defect.

Fibrillation
Rapid contractions of the heart muscles.



SIMILAR TERMS
--------------------------------------

Atria
The upper chambers of the heart that receive blood from the veins and pass it to the lower chambers of the heart.

Atrial arrhythmias
See: Arrhythmias, atrial.

Atrial fib
Atrial fibrillation.

Atrial fibrillation
Rapid, irregular contractions of the heart muscle fibres.

Atrial fibrillation (AF)
Atrial fibrillation is an irregular heart rhythm in which many impulses begin and spread through the atria. The resulting rhythm is disorganized, rapid and irregular and the atria are not able to fully empty their contents into the ventricles.

Atrial flutter
Well-organized but overly rapid contractions of the atrium of the heart (usually at a rate of 250-350 contractions per minute). Flutter refers to a rapid vibration or pulsation. The difference between flutter and fibrillation is that flutter is well organized while fibrillation is not. Atrial flutter is a serious and potentially unstable rhythm of the heart.

Atrial Myxoma
A myxoma is a tumor of the heart. It resides in the atrial chamber and causes symptoms when its growth produces a tumor so large it obstructs blood flow through the heart chambers.

Atrial septal defect (ASD)
A hole in the septum, the wall, between the atria, the upper chambers of the heart. Commonly called an ASD. ASDs constitute a major class of heart formation abnormalities present at birth (congenital cardiac malformations). Normally, when clots in veins break off, they travel first to the right side of the heart and, then to the lungs where they lodge as an obstruction (embolus). The lungs act as a filter to prevent the clots from entering the arterial circulation. However, when there is an ASD, a clot can cross from the right to the left side of the heart, then pass into the arteries as a paradoxical embolism. Once in the arterial circulation, a clot can travel to the brain, block a vessel there, and cause a stroke (cerebrovascular accident). Because of the risk of stroke from paradoxical embolism, it is usually recommended that even small ASDs be closed (repaired).

Atrial septum
The wall between the two upper chambers (the right and left atrium) of the heart.

Atridox
Atridox is a prescription or over-the-counter drug which is (or once was) legal in the United States and possibly in other countries. Active ingredient(s): doxycycline hyclate.

Atriodigital dysplasia
See: Holt-Oram syndrome.

Atrioventricular (AV)
Pertaining to the atria (the upper chambers of the heart) and the ventricles (the lower chambers of the heart). The AV node is an electrical relay station between the atria and the ventricles. Electrical signals from the atria must pass through the AV node to reach the ventricles. The AV node is a major element in the cardiac conduction system that generates electrical impulses within the heart, conducts them throughout the muscle of the heart, stimulates the heart to contract and pump blood, and so controls the heart rate.

Atrioventricular (AV) node
A center of special cells located near the center of the heart that helps to regulate the heart rhythm. Here, the electrical current slows for a moment before going on to the ventricles.

Atrioventricular block
An interruption of the electrical signal between the atria and the ventricles.

Atrioventricular node
A cluster of cells between the atria and ventricles that regulate the electrical current.

Atrium
Atria pl. One of two upper chambers in the heart.



PREVIOUS AND NEXT TERMS
--------------------------------------

Atopic dermatitis
A skin disease characterized by areas of severe itching, redness, scaling, and loss of the surface of the skin (excoriation). When the eruption (rash) has been present for a prolonged time, chronic changes occur due to the constant scratching and rubbing known as lichenification (thickening of the skin with accentuation of the skin lines to form a crisscross pattern).

Atorvastatin
A medication that lowers the level of cholesterol in the blood. Atorvastatin is a statin drug. All statins prevent the production of cholesterol in the liver by blocking the enzyme that makes cholesterol, HMGCoA reductase. They lower total blood cholesterol as well as low-density lipoprotein (LDL) cholesterol levels. Lowering LDL cholesterol levels retards progression and may even reverse coronary artery disease. Unlike the other statins, atorvastatin can also reduce the concentration of triglycerides in the blood. (High blood concentrations of triglycerides have been associated with coronary artery disease.) The brand name of atorvastin is Lipitor.

Atresia, anal
Congenital absence of an opening at the bottom end of the intestinal tract. Also called imperforate anus. Occurs in about 1 in 5,000 births. It is corrected by surgery. Atresia refers to the absence of a normal opening.

Atresia, aortic
"Congenital absence of the normal valvular opening from the left ventricle of the heart into the aorta. ""Atresia"" here refers to the absence of a normal opening."

Atresia, biliary
Congenital absence or closure of the major bile ducts, the ducts that drain bile from the liver.

Atrial

Atrial arrhythmias
See: Arrhythmias, atrial.

Atrial fib
Atrial fibrillation.

Atrial flutter
Well-organized but overly rapid contractions of the atrium of the heart (usually at a rate of 250-350 contractions per minute). Flutter refers to a rapid vibration or pulsation. The difference between flutter and fibrillation is that flutter is well organized while fibrillation is not. Atrial flutter is a serious and potentially unstable rhythm of the heart.

Atrial septal defect (ASD)
A hole in the septum, the wall, between the atria, the upper chambers of the heart. Commonly called an ASD. ASDs constitute a major class of heart formation abnormalities present at birth (congenital cardiac malformations). Normally, when clots in veins break off, they travel first to the right side of the heart and, then to the lungs where they lodge as an obstruction (embolus). The lungs act as a filter to prevent the clots from entering the arterial circulation. However, when there is an ASD, a clot can cross from the right to the left side of the heart, then pass into the arteries as a paradoxical embolism. Once in the arterial circulation, a clot can travel to the brain, block a vessel there, and cause a stroke (cerebrovascular accident). Because of the risk of stroke from paradoxical embolism, it is usually recommended that even small ASDs be closed (repaired).

Atrial septum
The wall between the two upper chambers (the right and left atrium) of the heart.

   We thank you for using the Health Dictionary to search for Atrial. If you have a better definition for Atrial than the one presented here, please let us know by making use of the suggest a term option. This definition of Atrial may be disputed by other professionals. Our attempt is to provide easy definitions on Atrial and any other medical topic for the public at large.
 
This dictionary contains 59020 terms.      









  
                    © Health Dictionary 2005 - All rights reserved -

   trial / arial / atial / atral / atril / atria / aatrial / attrial / atrrial / atriial / atriaal / atriall / qtrial / wtrial / strial / xtrial / ztrial / a5rial / a6rial / ayrial / ahrial / agrial / afrial / arrial / a4rial / at4ial / at5ial / attial / atgial / atfial / atdial / ateial / at3ial / atral / atriql / atriwl / atrisl / atrixl / atrizl / atriao / atriap / atria; / atria. / atria, / atriak / atriai /