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1. www.kenhub.com › en › libraryCardiac cycle phases: Definition, systole and diastole - Kenhub

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   Oct 30, 2023 · The cardiac cycle is defined as a sequence of alternating contraction and relaxation of the atria and ventricles in order to pump blood throughout the body. It starts at the beginning of one heartbeat and ends at the beginning of another.

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   • Video Duration: 15 min

2. open.oregonstate.education › 19-3-cardiac-cycle19.3 Cardiac Cycle – Anatomy & Physiology

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   Phases of the Cardiac Cycle. At the beginning of the cardiac cycle, both the atria and ventricles are relaxed (diastole). Blood is flowing into the right atrium from the superior and inferior venae cavae and the coronary sinus. Blood flows into the left atrium from the four pulmonary veins.

   • Author: Lindsay M. Biga, Sierra Dawson, Amy Harwell, Robin Hopkins, Joel Kaufmann, Mike LeMaster, Philip Mat...

   • Publish Year: 2019

3. med.libretexts.org › Bookshelves › Anatomy_and19.4: Cardiac Cycle - Medicine LibreTexts

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   Feb 24, 2023 · Phases of the Cardiac Cycle. At the beginning of the cardiac cycle, both the atria and ventricles are relaxed (diastole). Blood is flowing into the right atrium from the superior and inferior venae cavae and the coronary sinus. Blood flows into the left atrium from the four pulmonary veins.

4. byjus.com › biology › cardiac-cycleCardiac Cycle- Physiology, Diagram, Phases of the Cardiac Cycle

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   The diagram below represents the different phases of the cardiac cycle. The atrial systole, ventricular systole, atrial diastole, and ventricular diastole are clearly mentioned in the cardiac cycle diagram given below.

   • The different phases of the cardiac cycle involve: Atrial diastole Atrial systole Isovolumic contraction Ventricular ejection Isovolumic relaxation...
   • Systole is the period when the heart chambers contract that causes the ejection of blood into the aorta and pulmonary trunk.
   • Diastole is the part of the cardiac cycle during which the heart refills blood after it is emptied during the systolic phase.
   • The major symptoms of diastolic dysfunction include: Shortness of breath Weakness Dizziness Nausea Lack of appetite Coughing or wheezing

5. iu.pressbooks.pub › humanphys › chapterCardiac cycle – Basic Human Physiology

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   The cardiac cycle, which begins when both the atria and ventricles are relaxed (diastole), can be broken up into four phases – filling, isovolumic contraction, ejection, and isovolumic relaxation. Several variables change during each of these phases.

6. teachmephysiology.com › cardiac-cycleThe Cardiac Cycle - Pressures in The Heart - TeachMePhysiology

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   Jul 16, 2023 · The cardiac cycle can be divided into four stages: Filling phase – the ventricles fill during diastole and atrial systole. Isovolumetric contraction – the ventricles contract, but as the heart valves are shut, the volume remains constant.

7. openstax.org › pages › 19-3-cardiac-cycle19.3 Cardiac Cycle - Anatomy and Physiology | OpenStax

   openstax.org › pages › 19-3-cardiac-cycle

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   Phases of the Cardiac Cycle. At the beginning of the cardiac cycle, both the atria and ventricles are relaxed (diastole). Blood is flowing into the right atrium from the superior and inferior venae cavae and the coronary sinus. Blood flows into the left atrium from the four pulmonary veins.