The purpose of this essay is to describe contemporary social determinants of health and well-being in relation to stroke. It will reflect on information about and demonstrate an understanding of the provision of health care at local‚ regional and national level. It will also analyse and describe the evidence base underpinning approaches to health and wellbeing and the relevance it has to stroke. For the purpose of discussion‚ this essay will indicate an understanding of local‚ national and global
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occurs here while the atria contracts_____ d. AV bundle (bundle of His) ____link between the atria and ventricle______ e. Bundle branches ___convoy impulse down the interventricular septum________ f. Purkinje fibers __convey impulse throughout the ventricular walls______ 4. The action potentials spread from the autorhythmic cells of the intrinsic conduction system (electrical event) to the __contractile___ cells. The resulting mechanical events cause a heartbeat. 5. A tracing of the electrical activity
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it is greater than the pressure in the aorta and the pulmonary artery‚ the semi-lunar valves are then forced open‚ this is known as ventricular systole and the blood flows out the aorta and the pulmonary artery and out the heart to around the body and the lungs‚ once this is done the semi-lunar valves close and the ventricles relax‚ this is known as the ventricular diastole. This is repeated causing the heart to pump blood around the body; this is known as the cardiac
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time the pain did not subside and became increasingly severe‚ radiating to his left arm and lower jaw. In the emergency department‚ an ECG and cardiac enzymes were obtained. The cardiac monitor showed sinus tachycardia with occasional premature ventricular complexes. K.R. was treated with 2 L nasal oxygen‚ tissue plasminogen activator‚ sublingual nitroglycerin‚ and IV morphine sulfate. When he was pain free‚ he was transferred to the cardiac unit for monitoring. Discussion Questions 1. What changes
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heart. If your heart is weak and can’t pump enough blood around your body to keep it working‚ you might need an artificial heart. An artificial heart provides an extra ventricle to help to pump blood around your body that is called ventricular assist device. A ventricular assist device is made from metal and plastic‚ and has a small pumping chamber made by a special material that stops blood clots forming. It may be put into your body or lie outside your body‚ but it depends on what artificial heart
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relax once. THe contraction of the chamber is called systole and the relaxation is called diastole. The average heart has approximately 70-75 heartbeats per minute‚ each cycle lasting just under a second. 2. Explain the steps of a cardiac cycle. Ventricular filling: Happens during diastole‚ when the ventricles expand. Their pressure drops below the atria‚ the AV valse will open and the blood flows into the ventricles. The filling happens in three phases: 1. rapid ventricle filling‚ blood enters
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usually occurs near a tumor. Ventilation-perfusion ratio (V/Q) the relationship between ventilation and blood flow in the lung that is measure by calculating the difference between the alveolar and arterial partial pressured of oxygen. Ventricular septal defect a congenital malformation in which the wall between the left and right ventricles has a hole that allows blood to travel between the left and right ventricles potentially leading to congestive heart failure. Vital capacity Maximal
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Introduction The major function of the heart is to force blood in to a closed system of blood vessels within which the blood is confines and circulated to the entire body. Heart’s activity can be compared to a muscular pump equipped with one way valves. With each heartbeat‚ an electrical impulse travels through the heart and causes the heart muscle to squeeze and pump blood from the heart. These electrical impulses‚ transmitted through the heart‚ are spread throughout the body. This electrical
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5) The Purkinje fibers carried the action from the bundle branches to the ventricular walls. 6) The ends of the Purkinje fibers allow the ventricular muscles cells to contract because the action potential is rapidly passes through the AV bundle to the end of the Purkinje and this cause a rapid conduction and its providing a very strong contraction to the ventricular muscle. The intercalated discs are a network that allows the rapid transmission of the electrical impulses
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Muscle 4. Define extrasystole. An extra beat occurring before the time a normal contraction would occur. 5. Respond to the following questions if you used a physiograph. What was the effect of stimulation of the heart during ventricular contraction? No effect. During ventricular relaxation (first portion)? Extrasystole. During the pause interval? No effect. What does this indicate about the refractory period of cardiac muscle? Much longer than that of skeletal muscle. 218 Copyright © 2011 Pearson
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