What Is Heart Surgery? Heart surgery is done to correct problems with the heart. Many heart surgeries are done each year in the United States for various heart problems. Heart surgery is used for both children and adults. This article discusses heart surgery for adults. For more information about heart surgery for children‚ go to the Health Topics articles about congenital heart defects‚ holes in the heart‚ and tetralogy of Fallot. Doctors also use heart surgery to: • Repair or replace heart
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Circulatory system From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search This article is about the organ system. For the band‚ see Circulatory System. For transport in plants‚ see Vascular tissue. Circulatory system | | The human circulatory system. Red indicates oxygenated blood‚ blue indicates deoxygenated. | Latin | systema cardiovasculare | The circulatory system is an organ system that passes nutrients (such as amino acids‚ electrolytes and lymph)‚ gases‚ hormones
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Valves are found in veins and they are important because they prevent backflow and pump blood back to the heart. 9. What are the physical/structural features of cardiac muscle? Are these similar or different to skeletal muscle? To smooth muscle (both multi-unit and single-unit variations)? 10. What are the two types of cells in cardiac muscle?
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We have three types of muscles in our bodies‚ skeletal‚ smooth and cardiac. Each type of muscle performs different functions in our bodies. Some of the characteristics of our muscles are that they respond to stimuli‚ they are able to shorten in length‚ they stretch when they are pulled and they tend to return to their original shape after contracting or extending them. Muscle contractions occur when our nervous system sends a signal via the neuromuscular junctions the signal arrives at the end bulb
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(ICD) is one such device that‚ when implanted into the upper left torso‚ delivers high voltage jolts of electricity to patients who are at risk for life-threatening arrhythmias. Ultimately‚ they have the potential capacity to resynchronize one’s cardiac rhythm to the extent that imminent death may be averted. Although ICDs provide tremendous value within the context of medical care‚ they serve to represent an industry that is entangled in a web of wooly regulation‚ device flaws‚ and moral ambiguity
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Dennervation hypersensitivity damage to the ANS increases the effector response to stimulation Ganglia a cluster of nerve cell bodies that lie outside the CNS Mass activation Divergence-Preganglionic fibers branch to synapse with numerous postganglionic fibers (up‚ down‚ level) Convergence-Postganglionic fibers receive input from numerous preganglionic fibers Sympathetic system is activated as a unit Sympathoadrenal System the closely related functioning adrenal medulla and sympathetic nervous
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get to the apex‚ it has to travel down the septum (the middle of the heart). 1 problem with this is that the electrical impulse could spread to the cardiac muscles‚ causing it to contract which we do not want. To prevent this from happening we have a protective case surrounding our septum known as the Bundle of His. This prevents the contraction of cardiac muscle. When the ventricles or atriums contract‚ this is called ventricular/atrial systole. When the heart is relaxed‚ it is also known as dystole
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CONTRACT. 2. Even though cardiac muscle has an inherent ability to beat‚ the nodal system plays a critical role in heart physiology. What is that role? GENERATE ACTION POTENTIALS AT A GREATER FREQUENCY THAN OTHER CARDIAC MUS THEY ARE THE PACEMAKER OF THE HEARTTHEREFORE‚ IT SETS THE HEARTRATE UNDER NORMAL Electrocardiography 3. Define ECG. THE GRAPHIC RECORDING OF THE ELECTRICAL CHANGES (DEPOLARIZATION FOLLOWED DURING THE CARDIAC CYCLE REPOLARIZATION) OCCURING DURING THE CARDIAC CYCLE. 4. Draw an
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Your patient’s ECG shows depression S-T in leads V1–V2 and ST elevation in Leads II‚ III‚ and AVF. You realize that this indicates: Acute inferior infarction. Acute Anterior infarction Acute Lateral infarction Acute inferior-Posterior infarction The above ECG changes can be found if there is an occlusion of the: RCA LAD circumflex all of the above. the most complications associated with this problem is ventricular dysrhythmias. AV block. atrial flutter. hemodynamic
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After noting a pulse deficit when assessing a patient who has just arrived in the emergency department‚ the nurse will anticipate that the patient may require A) a. a 2-D echocardiogram. B) b. a cardiac catheterization. C) c. hourly blood pressure (BP) checks. D) d. electrocardiographic (ECG) monitoring. | D electrocardiographic (ECG) monitoring. | When reviewing the 12-lead electrocardiograph (ECG) for a healthy 86-year-old patient who is having an annual physical examination‚ which of the
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