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BackgroundEarly gastric cancer is frequently seen with nonspecific dyspeptic symptoms and subtle endoscopic features. Treatment at this stage of the disease produces a high chance of cure. If the diagnosis is missed at this early stage, then the prognosis may be much poorer depending on the...
Atrial fibrillation may be provoked by either vagal or sympathetic stimulation. Sympathetic effects are common in middle-aged and elderly patients with underlying heart disease. However, in the young, nondiseased heart, vagal influences are more likely to predominate. Recognition of vagally...
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