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The cardiac cycle describes all the activities of the heart through one complete heartbeat—that is, through one contraction and relaxation of both the atria and ventricles. A contraction event (of either the atria or ventricles) is referred to as systole, and a relaxation event is referred to as diastole.

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Constructing the Wiggers diagram using core concepts: a classroom activity. The cardiac cycle is a series of pressure changes that take place within the heart. These pressure changes result in the movement of blood through different chambers of the heart and the body as a whole.

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The Cardiac Cycle consists of Diastole and Systole During diastole → heart relaxes and fills with blood During systole → the heart contracts and eject blood (i.e. emptying) Note: If heart rate is 72 beats/min, the duration of the cardiac cycle is about 0.8 second per beat. Of which 0.3 second is for systole and 0.5 second is for diastole.

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Wigger's diagram is used to demonstrate the varying pressures in the atrium, ventricle, and artery during one cardiac cycle (Figure 2). Intracardiac pressures are different within the right and left sides of the heart. The left side has higher pressure, as it has to pump blood through the whole body, compared to the right side, which has to.

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11 Mechanical Events of the Cardiac Cycle • The cardiac cycle is divided into systole (ventricular contraction) and diastole (ventricular relaxation). o At the onset of systole, ventricular pressure rapidly exceeds atrial pressure, and the AV valves close. The aortic and pulmonary valves are not yet open, however, and so no ejection

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in a specialised area of cardiac cells, the sinoatrial node (SAN), situated in the right atrium. This is the heart's natural pace-maker. When working properly, it sets the heart rhythm (sinus rhythm) and initiates impulses that act on the myocardium, stim - ulating cardiac contraction. The cardiac impulse passes from the SAN into the atria,

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Cardiovascular Anatomy and Physiology Notes Contents Cardiovascular system anatomy and physiology Normal heart sounds Abnormal heart sounds Lymphatic system anatomy and physiology Osmosis High-Yield Notes This Osmosis High-Yield Note provides an overview of Cardiovascular Anatomy and Physiology essentials.

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Explain the events of the cardiac cycle. Define cardiac output and stroke volume. Distinguish among the types of blood vessels, their structures, and their functions. Identify the major arteries and veins of the pulmonary circuit as well as the areas they serve. Describe the hepatic portal system. KEY TERMS

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"Cardiac cycle refers to the sequence of events that take place when the heart beats." What is Cardiac Cycle? The cardiac cycle attributes to a comprehensive heartbeat from its production to the commencement of the next beat. It comprises diastole, the systole, and the intervening pause.

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Cardiac Cycle. The cardiac cycle comprises a complete relaxation and contraction of both the atria and ventricles, and lasts approximately 0.8 seconds. Beginning with all chambers in diastole (relaxation), blood flows passively from the veins into the atria and past the atrioventricular valves into the ventricles. The atria begin to contract.

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CARDIAC CYCLE The cardiac cycle is a period from the beginning of one heart beat to the beginning of the next one. It consists of two parts: Ventricular contraction called Ventricular relaxation called systole. diastole. Each part of the cardiac cycle consists of several phases characterized by either

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Cardiovascular and lymphatic systems make up the circulatory system a vast network of organs and vessels responsible for the flow of: The Lymphatic system Lymph Lymph nodes Lymph vessels Blood Nutrients Hormones Oxygen and other gases To and from the Cells of the body The Cardiovascular system Blood Blood vessels Heart

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Human Anatomy & Physiology: Cardiovascular Physiology Ziser 2404 Lecture Notes, 2005 3 idea of how rapidly the impulses are being conducted and how the heart is functioning Cardiac Cycle 1 complete heartbeat (takes ~ 0.8 seconds) consists of: systole contraction of each chamber diastole relaxation of each chamber two atria contract simultaneously

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Figure 19.3.1 - Overview of the Cardiac Cycle: The cardiac cycle begins with atrial systole and progresses to ventricular systole, atrial diastole, and ventricular diastole, when the cycle begins again. Correlations to the ECG are highlighted. Pressures and Flow

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January 2019 Women's Health Authors: Vanessa N Barros Figures Discover the world's research. The ECG signal consists of three waves start with the electrical P-wave generates from the upper.

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