systole


systole
/sis"teuh lee', -lee/, n.
1. Physiol. the normal rhythmical contraction of the heart, during which the blood in the chambers is forced onward. Cf. diastole.
2. Class. Pros. the shortening of a syllable regularly long.
[1570-80; < Gk systolé a drawing up, contraction, equiv. to sy- SY- + stolé pressure, orig., garment, equipment, equiv. to stol- (n. deriv. of stéllein to send, place) + -e fem. n. suffix; cf. DIASTOLE, SYSTALTIC]

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▪ heart function
      period of contraction of the ventricles (ventricle) of the heart that occurs between the first and second heart sounds. Systole causes the ejection of blood into the aorta and pulmonary trunk. Lasting usually 0.3 to 0.4 second, ventricular systole is introduced by a very brief period of contraction, followed by the ejection phase, during which 80 to 100 cubic centimetres of blood leave each ventricle. During systole, arterial blood pressure reaches its peak (systolic blood pressure), normally about 120 millimetres of mercury in human beings; this is slightly lower than the ventricular pressure because of the distensibility of the vessel walls. Atrial systole occurs toward the end of ventricular diastole, completing the filling of the ventricles. “Systole” may also refer to the contraction stage of the contractile vacuole in protozoans. Compare diastole. See also blood pressure.

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Universalium. 2010.

Look at other dictionaries:

  • systole — [ sistɔl ] n. f. • 1541; lat. systole, gr. sustolê « contraction » ♦ Physiol. Contraction du cœur par laquelle le sang est chassé dans les artères, qui commence par la contraction simultanée des deux oreillettes (systole auriculaire), suivie de… …   Encyclopédie Universelle

  • Systole — can mean the following:*Systole (medicine) is a term describing the contraction of the heart. *Systole (mathematics) is a term used in mathematics. *Systole (literature) is a term used to describe entry into the imagination/surreal in a text …   Wikipedia

  • systole — (n.) periodic contraction of the heart and arteries, 1570s, from Gk. systole contraction, from syn together (see SYN (Cf. syn )) + stem related to stellein to bring together, draw in; to put (see STALL (Cf. stall) (n.1)) …   Etymology dictionary

  • systole — [sis′tə lē΄] n. [ModL < Gr systolē < systellein, to draw together: see SYSTALTIC] the usual rhythmic contraction of the heart, esp. of the ventricles, following each dilatation (diastole), during which the blood is driven onward from the… …   English World dictionary

  • Systole — Sys to*le, n. [NL., fr. Gr. ?, fr. ? to contract; sy n with + ? to set, place.] 1. (Gram.) The shortening of the long syllable. [1913 Webster] 2. (Physiol. & Biol.) The contraction of the heart and arteries by which the blood is forced onward and …   The Collaborative International Dictionary of English

  • Systŏle — (gr., d.i. Zusammen , Einziehen), 1) der Moment, wo das Herz u. die Arterien durch ihre Zusammenziehung am meisten verengert sind u. das Blut aus ihnen fortgetrieben wird; vgl. Puls u. Arterien 2) c); 2) so v.w. Herzgespann; 3) in der Grammatik u …   Pierer's Universal-Lexikon

  • Systŏle — (griech., »Zusammenziehung«), in der Metrik im Gegensatz zur Diastole (s. d.) die Verkürzung einer langen Silbe vor der folgenden Hebung durch die Aussprache, z. B. »Obstupui stĕtĕruntque comae«. In der Physiologie die Zusammenziehung der… …   Meyers Großes Konversations-Lexikon

  • Systole — Systŏle (grch.), s. Diastole …   Kleines Konversations-Lexikon

  • Systole — Systole, griech., die kurze Aussprache einer langen Sylbe; in der Medicin die Zusammenziehung des Herzens …   Herders Conversations-Lexikon

  • Systole — Systole, Kontraktionsphase in der ⇒ Herzarbeit …   Deutsch wörterbuch der biologie

  • systole — ► NOUN ▪ the phase of the heartbeat when the heart muscle contracts and pumps blood into the arteries. Often contrasted with DIASTOLE(Cf. ↑diastolic). DERIVATIVES systolic adjective. ORIGIN Greek sustol , from sustellein to contract …   English terms dictionary


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