Diastole


Diastole
The time period when the heart is in a state of relaxation and dilatation (expansion). The final letter in "diastole" is pronounced as a long "e" as in "lee." The adjective for diastole is diastolic. The diastolic pressure is specifically the minimum arterial pressure during relaxation and dilatation of the ventricles of the heart. Diastole is the time when the ventricles fill with blood. In a blood pressure reading, the diastolic pressure is typically the second number recorded. For example, with a blood pressure of 120/80 ("120 over 80"), the diastolic pressure is 80. By "80" is meant 80 mm Hg (millimeters of mercury). A diastolic murmur is a heart murmur heard during diastole, the time the heart relaxes. "Diastole" came without change from the Greek diastole meaning "a drawing apart." The term has been in use since the 16th century to denote the period of relaxation of the heart muscle.
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Normal postsystolic dilation of the heart cavities, during which they fill with blood; d. of the atria precedes that of the ventricles; d. of either chamber alternates rhythmically with systole or contraction of that chamber. [G. d., dilation]
- electrical d. period from end of T wave to beginning of next Q wave.
- gastric d. a phase of relaxation of stomach peristalsis seen fluoroscopically or with the gastroscope.
- late d. SYN: presystole.

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di·as·to·le dī-'as-tə-(.)lē n
1) the passive rhythmical expansion or dilation of the cavities of the heart during which they fill with blood compare SYSTOLE
2) the rhythmical expansion of a pulsating vacuole (as of an ameba)
di·a·stol·ic .dī-ə-'stäl-ik adj

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n.
the period between two contractions of the heart, when the muscle of the heart relaxes and allows the chambers to fill with blood. The term usually refers to ventricular diastole, which lasts about 0.5 seconds in a normal heart rate of about 70/minute. During exertion this period shortens, so allowing the heart rate to increase. See also blood pressure, systole.
diastolic adj.

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di·as·to·le (di-asґto-le) [Gr. diastolē a drawing asunder; expansion] the dilatation, or period of dilatation, of the heart, especially of the ventricles; it coincides with the interval between the second and the first heart sounds. Cf. systole and see illustration at cardiac cycle, under cycle. diastolic adj

Medical dictionary. 2011.

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  • diastole — [ djastɔl ] n. f. • 1541; gramm. v. 1340; gr. diastolê « dilatation » ♦ Physiol. Phase de dilatation du cœur et des artères qui alterne avec la phase de contraction ou systole. ● diastole nom féminin (grec diastolê, dilatation) Période qui suit… …   Encyclopédie Universelle

  • diástole — f. cardiol. Período de dilatación o relajación del corazón o de las arterias durante el aflujo sanguíneo. Durante este período las cuatro cavidades (aurículas y ventrículos) abren las válvulas auriculoventriculares (tricúspide y mitral) y cierran …   Diccionario médico

  • Diastole — diastolė statusas T sritis Kūno kultūra ir sportas apibrėžtis Prieširdžių ir skilvelių išsiplėtimas, per kurį į širdį priteka kraujo. kilmė gr. diastolē – išsiplėtimas, ištempimas atitikmenys: angl. diastole vok. Diastole, f rus. диастола …   Sporto terminų žodynas

  • Diástole — Saltar a navegación, búsqueda Diástole como la fase del funcional en la cual el músculo cardíaco se relaja y dilata, y el corazón se llena de sangre, véase ciclo cardíaco. Diástole (figura literaria) (o éctasis). Obtenido de Di%C3%A1stole… …   Wikipedia Español

  • diastole — DIASTOLE. s. f. Terme d Anatomie. Mouvement naturel et ordinaire du coeur lorsqu il se dilate. C est dans le mouvement de la diastole que le sang des veines entre dans le coeur. La systole et la diastole du coeur …   Dictionnaire de l'Académie Française 1798

  • diastole — /di astole/ s.f. [dal lat. tardo diastŏle, gr. diastolḗ dilatazione ]. 1. (metr.) [nella metrica classica, allungamento di una vocale breve; nella metrica italiana, spostamento dell accento di una parola per ragioni ritmiche] ◀▶ sistole. 2.… …   Enciclopedia Italiana

  • diastole — 1570s, from medical L. diastole, from Gk. diastole drawing asunder, dilation, from diastellein, from dia through, thoroughly, entirely (see DIA (Cf. dia )) + stellein to set in order, arrange, array, equip, make ready, from PIE *stel yo ,… …   Etymology dictionary

  • diástole — ‘Movimiento de dilatación del corazón’. Los diccionarios de la Academia lo calificaron de masculino hasta fines del xix, lo que explica su frecuente uso con ese género en textos de esa época. Pero hoy solo se considera correcto el femenino, que… …   Diccionario panhispánico de dudas

  • diástole — (Del lat. diastŏle, y este del gr. διαστολή, dilatación). 1. f. Biol. Movimiento de dilatación del corazón y de las arterias, cuando la sangre penetra en su cavidad. 2. Biol. Movimiento de dilatación de la duramáter y de los senos del cerebro. 3 …   Diccionario de la lengua española

  • diastole — [dī as′tə lē΄] n. [LL < Gr diastolē, expansion, dilatation < diastellein, to separate, dilate < dia , apart + stellein, to put: see LOCUS] the usual rhythmic dilatation of the heart, esp. of the ventricles, following each contraction… …   English World dictionary

  • Diastole — Di*as to*le, n. [L., fr. Gr. ?, fr. ? to put asunder, to separate; dia through + ? to set, to place.] 1. (Physiol.) The rhythmical expansion or dilatation of the heart and arteries; correlative to {systole}, or contraction. [1913 Webster] 2.… …   The Collaborative International Dictionary of English


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