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By New york Heart Association Class 1 - No limitation of Physical activity Ordinary Physical activity does not cause undue fatigue Dyspnoea and Angina present Class 2 - Slight limitation of physical activity Ordinary Physical activity results in symptoms Class 3 - Marked limitation of physical activity Comfortable at rest, but less than ordinary activity causes symptoms. Class 4 - Unable to engage in any physical activity without discomfort Symptoms present even at rest. Most common symptoms of heart disease - Dyspnoea ,Chest pain, Palpitations, Syncope ,Fatigue. Risk Factors : Overweight,Pot belly,Stress,Increased Low density lipoproteins,Decrease in blood High density lipoprotein (HDL)levels,Sedentary life,Psychological problems,Chronic infections of long history,Old age,History of Previous Cardio-vascular disease,Below the age of 45 - Males are more prone to heart disease than females (females have high levels of High density Lipoprotein-also called 'Cardio-protective Lipoprote...