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'acute coronary syndrome unstable angina occurs'
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Average reductions in coronary events (benefits are greatest in patients with highest total risk) 1 Smoking cessation: 50% reduction in coronary events6 2 Low-dose aspirin in high-risk patients: 25% reduction in coronary events7 3 20% reduction in total cholesterol with statin treatment: 30% reduction in coronary events8 4 Treatment with pravastatin after acute coronary events: 22% reduction in mortality9 5 5–6 mmHg reduction in blood pressure: 15% reduction in coronary events (40% risk reduction for stroke)10 6 30 minutes of moderate exercise a day: 18% reduction in coronary events11 CARDIAC SPEACIALIST IN HEBBALA
A risk factor is a demographic characteristic associated with an increased risk of ischaemic heart disease when other variables have been controlled. The presence of a risk factor in an individual increases his or her relative risk of a coronary event (angina, infarction or death). The absolute risk of a coronary event depends on the individual’s total number of risk factors and theirseverity (total risk). Important coronary risk factors are shown in Table 1.1. Risk assessment charts have been developed to estimate a patient’s cardiac risk over a number of years using easily identified risk factors. There are charts for different populations. The charts can be used to predict cardiovascular events or mortality (as in the NHF chart in Fig 1.1 on p. 4) or cardiac risk (systematic coronary risk evaluation system or SCORE charts). These charts can be very helpful in deciding when intervention to reduce risk is warranted; for example, when anti-hypertensive treatment should be commenced for a patient with mild blood pressure elevation. Risk factor reduction involves assessing the presence, severity and importance of risk factors for a
The causes of coronary symptoms The symptoms of coronary artery disease are caused by the reduction of myocardial perfusion that results from narrowing of the lumen of one or more of the coronary arteries. This narrowing is most often the result of atherosclerosis. Other much less common causes include: 1 coronary artery spasm (p. 146) (often in an already diseased segment of artery but sometimes as a result of the use of cocaine) 2 thrombosis (usually on an already diseased, or occasionally aneurismal, segment) 3 embolism (e.g. from an infected aortic valve) 4 congenital coronary abnormality
The causes of coronary symptoms The symptoms of coronary artery disease are caused by the reduction of myocardial perfusion that results from narrowing of the lumen of one or more of the coronary arteries. This narrowing is most often the result of atherosclerosis. Other much less common causes include: 1 coronary artery spasm (p. 146) (often in an already diseased segment of artery but sometimes as a result of the use of cocaine) 2 thrombosis (usually on an already diseased, or occasionally aneurismal, segment) 3 embolism (e.g. from an infected aortic valve) 4 congenital coronary abnormality HEART SPECIALIST IN YELAHANKA
CARDIOLOGIST IN SAHAKARANAGAR The causes of coronary symptoms The symptoms of coronary artery disease are caused by the reduction of myocardial perfusion that results from narrowing of the lumen of one or more of the coronary arteries. This narrowing is most often the result of atherosclerosis. Other much less common causes include: 1 coronary artery spasm (p. 146) (often in an already diseased segment of artery but sometimes as a result of the use of cocaine) 2 thrombosis (usually on an already diseased, or occasionally aneurismal, segment) 3 embolism (e.g. from an infected aortic valve) 4 congenital coronary abnormality 5 vasculitis.
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