In academic writing, the ability to refute an argument is a cornerstone of logical and critical thought, as well as an essential persuasive tool. Learn more through a comprehensive definition and examples, then put your new expertise to the test with a quiz.
The signs and symptoms of acute coronary syndrome, which usually begin abruptly, include the following: Chest pain (angina) or discomfort, often described as aching, pressure, tightness or burning. Pain radiating from the chest to the shoulders, arms, upper abdomen, back, neck or jaw. Nausea or vomiting. Indigestion.
Systemic mastocytosis. Patients may present with 'inexplicable' symptoms related to mast cell mediator release, such as vascular instability, anaphylactic shock, flushing, diarrhoea and headache (sometimes without skin lesions). There is a wide range of symptoms and a variety of triggers (see box).