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cor biloculare with transposition of the great cardiac vessels and
cor biloculare with transposition of the great cardiac vessels and

... normal arrangement in which there are a posterior non-coronary and a left and a right anterior coronary bearing cusps, there are in this heart an anterior noncoronary and a left and a right posterior coronary bearing cusp. The left coronary artery thus arises from what was destined to be the right c ...
A Three-Dimensional Computer Model of the Human Heart for
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... grid repeated approximately 57,000 times to model a single beat of the heart. Such a computation takes about 250 CPU hours on the Cray T90, a large shared-memory multi- ...
In small unicellular organisms, substances move around slowly by
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... 18. The figure below shows the two sites of respiration in the body. Efficient respiration is an important factor for effective performance in sport. Describe in detail the process of gaseous exchange either at site A or at site B. Explain why gaseous exchange increases at both of these sites during ...
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... blocked at the AV junction, therefore, the atria and the ventricles beat independently from each other. This arrhythmia is dangerous because it significantly decreases cardiac output, and could lead to asystole. Possible causes: acute inferior and anterior myocardic infraction, coronary heart diseas ...
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... • Pharmacologic management should NOT be altered due to pregnancy • If unstable acute arrythmia in pregnancy not responding to medical management can perform electrical cardioversion • Ideally prefer evaluation PRIOR to pregnancy to determine if need ablation, pacemaker or ICD, and to review risks o ...
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... hypothalamus is like your brain's inner thermostat (that little box on the wall that controls the heat in your house). The hypothalamus knows what temperature your body should be (about 98.6 degrees Fahrenheit or 37 degrees Celsius). If your body is too hot, the hypothalamus tells it to sweat. If yo ...
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... He quickly appreciated the limitations of programmed electrical stimulation in investigating the factors modulating cardiac arrhythmias. He turned to Holter recording as a tool for dissecting the modifiers of the substrate, especially the autonomic nervous system. Philippe introduced the concept of ...
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Myocardial infarction



Myocardial infarction (MI) or acute myocardial infarction (AMI), commonly known as a heart attack, occurs when blood flow stops to a part of the heart causing damage to the heart muscle. The most common symptom is chest pain or discomfort which may travel into the shoulder, arm, back, neck, or jaw. Often it is in the center or left side of the chest and lasts for more than a few minutes. The discomfort may occasionally feel like heartburn. Other symptoms may include shortness of breath, nausea, feeling faint, a cold sweat, or feeling tired. About 30% of people have atypical symptoms, with women more likely than men to present atypically. Among those over 75 years old, about 5% have had an MI with little or no history of symptoms. An MI may cause heart failure, an irregular heartbeat, or cardiac arrest.Most MIs occur due to coronary artery disease. Risk factors include high blood pressure, smoking, diabetes, lack of exercise, obesity, high blood cholesterol, poor diet, and excessive alcohol intake, among others. The mechanism of an MI often involves the rupture of an atherosclerotic plaque, leading to complete blockage of a coronary artery. MIs are less commonly caused by coronary artery spasms, which may be due to cocaine, significant emotional stress, and extreme cold, among others. A number of tests are useful to help with diagnosis, including electrocardiograms (ECGs), blood tests, and coronary angiography. An ECG may confirm an ST elevation MI if ST elevation is present. Commonly used blood tests include troponin and less often creatine kinase MB.Aspirin is an appropriate immediate treatment for a suspected MI. Nitroglycerin or opioids may be used to help with chest pain; however, they do not improve overall outcomes. Supplemental oxygen should be used in those with low oxygen levels or shortness of breath. In ST elevation MIs treatments which attempt to restore blood flow to the heart are typically recommended and include angioplasty, where the arteries are pushed open, or thrombolysis, where the blockage is removed using medications. People who have a non-ST elevation myocardial infarction (NSTEMI) are often managed with the blood thinner heparin, with the additional use angioplasty in those at high risk. In people with blockages of multiple coronary arteries and diabetes, bypass surgery (CABG) may be recommended rather than angioplasty. After an MI, lifestyle modifications, along with long term treatment with aspirin, beta blockers, and statins, are typically recommended.Worldwide, more than 3 million people have ST elevation MIs and 4 million have NSTEMIs each year. STEMIs occur about twice as often in men as women. About one million people have an MI each year in the United States. In the developed world the risk of death in those who have had an STEMI is about 10%. Rates of MI for a given age have decreased globally between 1990 and 2010.
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