Atri Health Dictionary

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Atri: From 1 Different Sources

(atrio-) combining form denoting an atrium, especially the atrium of the heart. Example: atrioventricular (relating to the atria and ventricles of the heart).
Health Source: Oxford | Concise Colour Medical Dictionary
Author: Jonathan Law, Elizabeth Martin

Atrial Natriuretic Peptide

The atria (see ATRIUM) of the heart contain peptides with potent diuretic and vasodilating properties. It has been known since 1980 that extracts of human atria have potent diuretic and natriuretic effects in animals (see DIURETICS). In 1984 three polypeptide species were isolated from human atria and were called alpha, beta and gamma human atrial natriuretic peptides. Plasma concentration of immunoreactive atrial natriuretic peptide can now be measured: the levels are low in healthy subjects and are increased in patients with congestive heart failure. Infusion of the peptides reduces blood pressure and causes a natriuresis and diuresis.... atrial natriuretic peptide

Atrial Septal Defect

See HEART, DISEASES OF – Congenital heart disease.... atrial septal defect

Atrium

(Plural: atria.) Atrium is the name now given to the two upper cavities of the HEART. These used to be known as the auricles of the heart. The term is also applied to the part of the ear immediately internal to the drum of the ear.... atrium

Atrial Fibrillation

Arrhythmia. Heart flutter. Disorderly uncoordinated contraction of atrial muscle wall, the ventricles responding irregularly.

Causes: thyrotoxicosis, valvular or coronary disease. Present in mitral stenosis and myocarditis. Precursor of heart failure. Carrying a bucket of coal upstairs may be sufficient to precipitate an attack. Symptoms. Pulse irregular in time and force, breathlessness, visible pulse in neck, excessive heart beats of sudden onset or permanent, with breathlessness often from emotional excitement.

Treatment. Patient should avoid excessive physical exercise or give way to anxiety and depression. Alternatives:– Tea. Equal parts: Hawthorn (berries or blossoms), Broom, Valerian. 1-2 teaspoons in each cup boiling water; infuse 5-15 minutes; dose – half-1 cup thrice daily.

Tablets/capsules. Hawthorn, Valerian, Motherwort.

Formula. Hawthorn 2; Passion flower 2; Broom 3. Mix. Dose: Powders: 750mg (three 00 capsules or half a teaspoon). Liquid extracts: 1 teaspoon. Tinctures: 2 teaspoons. In water or honey thrice daily. Practitioner. Tincture Gelsemium (BPC 1973): 2-5 drops. Tincture Lily of the Valley: 0.5-1ml.

Undue violence. Tincture Gelsemium 1; Tincture Cactus 2. Mix. Dose: 5-10 drops. Where heart muscle is damaged, add 1 part Liquid Extract Black Cohosh.

Broom. Spartiol Drops, 20 drops thrice daily. (Klein)

Diet. See: DIET – HEART AND CIRCULATION. ... atrial fibrillation

Atrioventricular Node

A small knot of specialized muscle cells in the right atrium of the heart. Electrical impulses from the sinoatrial node pass through the atrioventricular node and along conducting fibres to the ventricles, causing them to contract.... atrioventricular node

Atrial Flutter

A type of abnormality of the heartbeat (see arrhythmia, cardiac)

in which the atria beat regularly and very rapidly. Symptoms and treatment are the same as for atrial fibrillation.... atrial flutter

Atrioventricular Bundle

(AV bundle, bundle of His) a bundle of modified heart muscle fibres (Purkinje fibres) passing from the *atrioventricular node forward to the septum between the ventricles, where it divides into right and left bundles, one for each ventricle. The fibres transmit contraction waves from the atria, via the AV node, to the ventricles.... atrioventricular bundle

Atrioventricular Nodal Re-entry Tachycardia

(AVNRT) *re-entry tachycardia arising from the presence of an abnormal electrical connection between atria and ventricles situated within the *atrioventricular node.... atrioventricular nodal re-entry tachycardia

Atrioventricular Reciprocating Tachycardia

(AVRT) *re-entry tachycardia arising from the presence of an abnormal electrical connection between atria and ventricles situated outside the *atrioventricular node. See accessory pathway.... atrioventricular reciprocating tachycardia

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