1. Any simple separation of normally joined parts. SYN: divarication. 2. The mid-portion of diastole when the blood enters the ventricle slowly or ceases to enter prior to atrial systole. D. duration is in inverse proportion to heart rate and is absent at very high heart rates. [G. a separation]
- d. recti separation of rectus abdominis muscles away from the midline, sometimes seen during or following pregnancy.

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di·as·ta·sis dī-'as-tə-səs n, pl -ta·ses -.sēz
1) an abnormal separation of parts normally joined together
2) the rest phase of cardiac diastole occurring between filling of the ventricle and the start of atrial contraction

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di·as·ta·sis (di-asґtə-sis) [Gr. “separation”] 1. a form of dislocation in which there is separation of two bones normally attached to each other without the existence of a true joint; as in separation of the pubic symphysis. Also, separation beyond the normal between associated bones, as between the ribs, or the ulna and radius. 2. a relatively quiescent period of slow ventricular filling during the cardiac cycle; it occurs in mid-diastole, following the rapid filling phase and just prior to atrial systole. See illustration at cardiac cycle, under cycle.

Medical dictionary. 2011.

См. также в других словарях:

  • diastasis — diástasis diástasis f. anat. Separación de dos superficies articulares sin que se produzca luxación entre sí. Medical Dictionary. 2011. diastasis sepa …   Diccionario médico

  • Diastasis — (from the Ancient Greek διάστασις separation ) may refer to: Diastasis (pathology) is the separation of parts of the body that are normally joined together, such as the separation of certain abdominal muscles during pregnancy, or of adjacent… …   Wikipedia

  • diastasis — ● diastasis nom masculin (grec diastasis, séparation) Écartement anormal entre deux éléments anatomiques distincts, normalement fixés l un à l autre. diastasis [djastazis] n. m. ÉTYM. Mil. XXe; diastase, 1752; mot grec « séparation ». → Diastase …   Encyclopédie Universelle

  • Diastasis — Di*as ta*sis, n. [NL. See {Diastase}.] (Surg.) A forcible separation of bones without fracture. [1913 Webster] …   The Collaborative International Dictionary of English

  • Diastăsis — (gr., Med.), widernatürliches Auseinanderweichen von Theilen, bes. Knochen od. Knorpeln …   Pierer's Universal-Lexikon

  • Diastasis — Diastāsis (grch.), das krankhafte Auseinanderweichen von Knochen und Knorpel; auch Ausartung der Pflanzen …   Kleines Konversations-Lexikon

  • Diastasis — (græsk) eller diastase. Afstand mellem to samhørende dele; benyttes særlig om afstanden mellem brudstykkerne af en brækket knogle …   Danske encyklopædi

  • Diastasis — Un diastasis est une affection pathologique, une séparation permanente de deux surfaces articulaires appartenant à deux os parallèles. Exemples Diastasis tibio fibulaire Diastasis pubien (écartement de la symphyse pubienne) Diastasis radio… …   Wikipédia en Français

  • diastasis — (Del gr. diastasis.) ► sustantivo femenino MEDICINA Separación entre dos estructuras óseas, sin que exista fractura o luxación. IRREG. plural diastasis …   Enciclopedia Universal

  • diastasis — /duy as teuh sis/, n., pl. diastases / seez /. 1. Med. the separation of normally joined parts, as in the dislocation of bones, without fracture. 2. Physiol. the diastolic rest period immediately preceding systole. [1735 45; < NL < Gk diástasis a …   Universalium

  • -diastasis — noun combining form (plural diastases) Etymology: New Latin, from Greek diastasis separation 1. : disintegration myelodiastasis …   Useful english dictionary

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