Essay ON PAcemaker A pacemaker (or artificial pacemaker‚ is a medical device that uses electrical impulses‚ delivered by electrodes contacting the heart muscles‚ to regulate the beating of the heart. The primary purpose of a pacemaker is to maintain an adequateheart rate‚ either because the heart’s native pacemaker is not fast enough‚ or there is a block in the heart’s electrical conduction system. Modern pacemakers are externally programmable and allow the cardiologist to select the optimum pacing
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blood vessels‚ which allows them to absorb the pressure emitted from the heart with each beat and to return blood back to the heart‚ usually on an uphill course against the constant pull of gravity. Key point: In differentiating between arteries‚ veins‚ and capillaries‚ emphasize that the structure of each type of vessel is related to the differing amounts of pressure they must each absorb from the heart‚ as well as their respective roles in blood
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The brachial plexus is a somatic nerve plexus formed by intercommunications among the ventral rami (roots) of the lower 4 cervical nerves (C5-C8) and the first thoracic nerve (T1). It lies partly in the neck and partly in the axilla. It is responsible for the motor innervation of all of the muscles of the upper extremity‚ with the exception of the trapezius and levator scapula. The brachial plexus supplies all of the cutaneous innervation of the upper limb‚ except for the area of the axilla (which
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Journal of Infusion Nursing Issue: Volume 33(3)‚ May/June 2010‚ p 156-160 Copyright: (C) Copyright 2010 by the Infusion Nurses Society Publication Type: [FEATURES] DOI: 10.1097/NAN.0b013e3181d9c942 ISSN: 1533-1458 Accession: 00129804-201005000-00005 [FEATURES] Benefits of Establishing an Intravenous Team and the Standardization of Peripheral Intravenous Catheters da Silva‚ Gislene Aparecida BN; Priebe‚ Sheila BN; Dias‚ Fabio Nunes MSc ABSTRACT The purpose
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Mrs Stowe’s political purpose makes the article have two lines‚ and she used them to contrast‚ to show her ideas. The first line is Uncle Tom. Mrs Stowe did not hesitate to write too many details to show Uncle Tom’s hon-esty and kindness‚ but Tom was so loyal that he was sold to different slave owners many times‚ or was whipped anytime‚ although Tom was in this situation‚ he never thought to resist. Uncle Tom was kind‚ and in order not to sold other slaves‚ he was willing to be sold alone. Tom wanted
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Instructor’s Manual for the Laboratory Manual to Accompany Hole’s Essentials of Human Anatomy and Physiology Eighth Edition Terry R. Martin Kishwaukee College Instructor’s Manual for the Laboratory Manual to Accompany Hole’s essentials of human anatomy and physiology‚ eighth edition David shier‚ jackie butler‚ and ricki lewis Published by McGraw-Hill Higher Education‚ an imprint
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22 1 VVhich of the iollowing nerves innervates the 11-~ferior buccal n-iucose of tl-ie floor of tlie oral cavity? A B. C D. E 2. C. D E. 3. A. B. C. D. E. 7. E. 8 E. 4. Contain valves Follow the veins Always travel in pairs Only found on the anterior surface of the limb Contain fenestrations to allow passage of fluids into the interstitiurn Which of the following controls parathyroid gland function? A. 0. C. D. E. Thyroxin
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It has been demonstrated that‚ as opposed to the intrarenal arteries‚ the intrarenal veins show no segmental arrangement at all‚ there being a free anastomosis of the venous system throughout the kidney. These anastomoses occur at different levels between the stellate veins (cortex)‚ between the arquate veins (base of the pyramids) and between the interlobar veins (close to the renal sinus). There are also anastomoses around the calyceal necks that join a longitudinal system
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Varicose veins are a common condition among women and men. The bulging and twisting veins can not only be unsightly but can cause pain‚ itching‚ swelling and nighttime cramps in the affected legs. If left untreated‚ varicose veins can lead to more serious conditions such as blood clots or skin ulcerations. Sclerotherapy is a popular way to safely treat varicose veins‚ relieving patients of pain and embarrassment of the condition. What is Sclerotherapy? Sclerotherapy is a treatment for varicose
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When veins do not work properly‚ it is called venous insufficiency. This means that the veins are not effectively sending the blood back to the heart. The severity of venous insufficiency differs with each person. If the problem goes untreated‚ the person may feel continuous symptoms of pain‚ swelling and fatigue in the legs and ankles. If the problem is advanced there are other symptoms such as leg ulcers‚ superficial thrombophlebitis‚ spontaneous bleeding and‚ possibly‚ deep vein thrombosis. Our
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