| atrial echo | Electrical reactivation of the atrium by a retrograde impulse returning from the A-V node while the antegrade impulse continues to the ventricle; characterised electrocardiographically, by a pair of P waves enclosing a QRS complex, the second P wave being inverted, indicating that it is the reverse (the retrograde pathway) of the pathway of the first P wave (the antegrade pathway). (05 Mar 2000) |
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| atrial extrasystole | A premature contraction of the heart arising from an ectopic atrial focus. Synonym: auricular extrasystole. (05 Mar 2000) |
| atrial fibrillation | <cardiology> A condition where there is disorganised electrical conduction in the atria, resulting in ineffective pumping of blood into the ventricle. Acronym: AF (02 Jan 1998) |
| atrial flutter | <cardiology> A rapid well organised contraction of the atrium at a rate of 250-350 contractions per minute. Ventricular response rates are usually some multiple of 300. ECG shows sawtooth waves. Atrial flutter is considered a serious and potentially unstable rhythm. (27 Sep 1997) |
| atrial function | The haemodynamic and electrophysiological action of the atria. (12 Dec 1998) |
| atrial function, left | The haemodynamic and electrophysiological action of the left atrium. (12 Dec 1998) |
| atrial function, right | The haemodynamic and electrophysiological action of the right atrium. (12 Dec 1998) |
| atrial fusion beat | A beat that occurs when the atria are activated in part by the sinus impulse and in part by an ectopic or retrograde impulse from A-V junction or ventricle. (05 Mar 2000) |
| atrial gallop | Gallop rhythm in which the gallop sound follows atrial systole in late diastole and is an audible fourth heart sound due to forceful ventricular filling. Synonym: atrial gallop. Protodiastolic gallop, gallop rhythm in which the gallop sound occurs in early diastole and is an abnormal third heart sound. (05 Mar 2000) |
| atrial granule serine proteinase | <enzyme> Converts pro-atrial natriuretic factor to anf by cleaving the arg98-ser99 bond; n-terminal 26-residue amino acid sequence given in first source Registry number: EC 3.4.21.- (26 Jun 1999) |
| atrial myxoma | <cardiology, oncology, tumour> A very rare primary cardiac tumour, composed of connective tissue, located in the left or right atrium. Symptoms include chest pains, shortness of breath, orthopnoea, paroxysmal nocturnal dyspnoea, fainting, palpitations, dizziness and syncope. Diagnosis is confirmed by echocardiogram. Treatment involves the surgical excision of the tumour. (27 Sep 1997) |
| atrial natriuretic factor | <chemical> A potent natriuretic and vasodilatory peptide or mixture of different-sized low molecular weight peptides derived from a common precursor and secreted by the heart atria. All these peptides share a sequence of about 20 amino acids. Chemical name: Atriopeptin (12 Dec 1998) |
| atrial natriuretic peptide | <hormone> This cardiac hormone (28 amino acid residues) regulates salt and water balance in body fluids and blood pressure, it has potential as a medication to treat heart and kidney failure and the buildup of excess fluid in tissue. (09 Oct 1997) |
| atrial premature complexes | Premature contractions of the heart arising from an ectopic atrial focus. With ventricular premature complexes, they represent one of the most common causes of irregular pulse. They are more apt to occur if there is atrial or conduction system disease such as left atrial enlargement in mitral stenosis. In community prospective studies, atrial premature complexes are not related to sudden death, as are ventricular premature beats in coronary disease. (12 Dec 1998) |
| atrial premature contraction | <cardiology> An premature heartbeat of atrial origin. Generally nonserious and typically exacerbated by stimulant use (for example alcohol, decongestants, caffeine, nicotine). (27 Sep 1997) |
Synonyms : Atrial Functions, Right, Function, Right Atrial, Functions, Right Atrial, Right Atrial Functions
Synonyms : Atrial Myosin, Myosin, Atrial
Synonyms : ANF (1-126), ANF (1-28), ANF (99-126), ANF Precursors, ANP (1-126), ANP (1-28), ANP Prohormone (99-126), ANP-(99-126), Atrial Natriuretic Factor (1-126), Atrial Natriuretic Factor (1-28), Atrial Natriuretic Factor (99-126), Atrial Natriuretic Factor Precursors
Synonyms : Atrial Premature Complex, Complex, Atrial Premature, Premature Atrial Complex, Atrial Beat, Premature, Atrial Beats, Premature, Atrial Complex, Premature, Atrial Complices, Premature, Atrial Contraction, Premature, Atrial Contractions, Premature
Synonyms : A-V Node, Atrio-Ventricular Node, A V Node, A-V Nodes, AV Nodes, Atrio Ventricular Node, Atrio-Ventricular Nodes, Atrioventricular Nodes, Node, A-V, Node, AV, Node, Atrio-Ventricular, Node, Atrioventricular, Nodes, A-V, Nodes, AV, Nodes, Atrio-Ventricular
| atrial fibrillation |
fibrillation of the muscles of the atria of the heart
출처: wordnet.princeton.edu/perl/webwn
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| atrial septal defect |
an abnormal opening between the left and right atria of the heart
출처: wordnet.princeton.edu/perl/webwn
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| atrioventricular |
relating to or affecting the atria and ventricles of the heart; "atrioventricular disease"
출처: wordnet.princeton.edu/perl/webwn
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| atrioventricular block |
heart block: recurrent sudden attacks of unconsciousness caused by impaired conduction of the impulse that regulates the heartbeat
출처: wordnet.princeton.edu/perl/webwn
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| atrioventricular bundle |
a bundle of modified heart muscle that transmits the cardiac impulse from the atrioventricular node to the ventricles causing them to contract
출처: wordnet.princeton.edu/perl/webwn
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| atri | a bundle of modified heart muscle that transmits the cardiac impulse from the atrioventricular node to the ventricles causing them to contract |
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| atri | either of two heart valves through which blood flows from the atria to the ventricles |
| atri | (nautical) of an anchor |
| atri | orach |
| atri | Asiatic plant resembling spinach often used as a potherb |
| atri | handsome low saltbush of arid southwestern United States and Mexico having blue-green prickly-edged leaves often used for Christmas decoration |
| atri | spiny shrub with silvery-scurfy foliage of alkaline plains of southwestern United States and Mexico |
| atri | Eurasian aromatic oak-leaved goosefoot with many yellow-green flowers |
| atri | the central area in a building |
| atri | any chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart) |
| atri | the upper chamber of each half of the heart |
| atri | the right upper chamber of the heart that receives blood from the venae cavae and coronary sinus |