The heart is a strong, muscular pump with the size of a fist that pumps blood through the circulatory system. Every day, the heart beats (expands and contracts) 100,000 times and pumps about 7200 gallons of blood. In a life of 70 years, the heart beats more than 2.5 billion times. The circulatory system is a network of elastic tubes through which circulates blood, carrying oxygen and nutrients to all body cells. It includes the heart, lungs, arteries, arterioles (small arteries), capillaries (the smallest blood vessels), venue (small veins) and veins through which blood returns to heart. If all blood vessels were laid end to end, they would be 100,000 km, enough to circle the Earth twice. Blood brings oxygen and nutrients to all organs and tissues, including the heart. He also picks up waste products from cells, which will be eliminated by the kidneys, liver and lungs.
Major causes of heart disease are those that significantly increase the risk of cardiovascular disease (heart and blood vessels). Other factors cause an increased risk of cardiovascular disease, but their importance and prevalence has not yet been precisely determined. The last ones are also called minor causes of heart disease. American Heart Association has identified several risk factors, some of which can be controlled and others not. With as many risk factors present, the possibility of developing coronary heart disease is higher. In addition, this possibility increases with increasing levels of each risk factor. Thus, a person with a total cholesterol of 300 mg / dL shows a greater risk than another with 245 mg / dL, although all individuals whose total cholesterol exceeds 240 mg / dL shows a very high risk.
Major unchangeable risk factors of heart disease:
-Genetic heritage (including race)
Major modifiable risk factors of heart disease:
Other factors that increase the risk of heart disease:
Major risk factors that can be modified, treated or or controlled through the change of lifestyle or with the help of drugs:
Smoking – the risk at which smokers are exposed is 2-4 times higher than that of non-smokers. Smoking is a major risk factor and can cause sudden death in patients with coronary artery disease. People who smoke cigars or pipes present a high risk of death from coronary heart disease (and even stroke), but this risk is even greater in cigarette smokers. Inhalation of cigarette smoke (passive smoking) increases the risk of heart disease even for non-smokers.
High level of cholesterol – with increasing blood cholesterol, increases the risk of heart disease emergence. Pairing this with other risk factors (smoking and hypertension ) cause an additional increase in risk.
Arterial hypertension – is a risk factor for stroke , cardiac arrest, congestive heart failure and kidney failure When hypertension is associated with obesity , smoking, high cholesterol or diabetes , the risk of a heart attack or stroke increases several times.
Sedentary, moderate and regular physical activity prevents heart disease and heart, helps control blood cholesterol, diabetes and obesity.
Obesity – overweight persons, and especially those with extra fat around the waist, are more at risk of developing a heart disease and stroke even if it doesn’t shows other risk factors. Excess body fat increases heart activity, increased blood pressure, blood cholesterol and triglycerides and decreased HDL-cholesterol levels (“good” cholesterol). It can increase the possibility of diabetes.
Hyperglycemia – Diabetes significantly increases the risk of cardiovascular disease. Even if you keep glycemia under control, diabetes increases the risk of heart disease and stroke.
Read more causes heart disease http://healthinformationworld.com/2011/06/what-causes-heart-disease/
Factors that increase the risk of heart disease