HUMAN HEART - AN HONORABLE LIFE MACHINE
DR.S.M.ALAM, DR.A.H.SHAIKH & DR. M.A.KHAN
Aug 18 - 24, 2008
Our heart is the key, the power of the body. The heart is a pump made of strong muscle. In the average adult the heart beats sixty to ninety times every minute of every day. The heart pumps about half a tea cup of blood with each beat. At the time of resting a man this works out at about five liters each minute but during vigorous exercise it can increase to almost twenty-five litres per minute. The pumping system works as follows: Each side of the heart is divided into two chambers; an upper one called an atrium and a lower one called ventricle. Blood pumped from the right side of the heart to the lungs. There it takes up oxygen, turning a bright red color in the process. It then returns to the heart, but this times to the left side. From there it is pumped out through the arteries to carry oxygen and nutrient rich blood to every cells and to the rest of the body. Having given up its oxygen the body tissue, it becomes bluer color, and returns through the veins to the right side of the heart completing the cycle.
Coronary disease: Coronary heart disease normally begins with the narrowing of the coronary arteries carrying blood supply pipelines to the heart and they carry the fuel and oxygen needed for its efficient working. When these arteries are diseased, their lining becomes thickened by fatty and other materials, so that the flow of blood may be reduced. When this happens, a severe pain in the chest called angina may result ,which can spread to the neck and arms. If there is more complete obstruction and a prolonged reduction of blood flow, part of the heart muscle becomes injured or damaged. This is what occurs in a coronary heart attack. The coronary heart disease is the leading cause of death in many countries of the world.
The risk factors: Smoking is one of the common factors which cause heart attacks. The other two are raised blood pressure and raised levels of blood cholesterol( a type of fat) in the blood. Blood cholesterol levels and blood pressure are affected by: an unhealthy diet, lack of exercise, being overweight and stress. Smoking causes coronary heart disease as well as cancer. Two of the most important chemicals in tobacco smoke have particularly damaging affect on the heart are carbon monoxide and nicotine. Carbon dioxide joins onto the red pigment of the blood, called hemoglobin, and reduces its power to carry oxygen to the heart and all other parts of the body. poisonous gas. Nicotine stimulates the body to produce adrenaline, which makes the heart the heart faster and raised the blood pressure. High blood pressure is particularly dangerous because it does not itself cause any symptoms, despite the commonly held view that it causes headaches, giddiness, flushing and nose bleeds. The higher the blood pressure, the more likely eventually is a heart attack or a stroke. However, high blood pressure can generally be lowered quite easily with proper treatment. High blood pressure is risk factor for cardiovascular disease that can be measured. Both carbon dioxide and nicotine may encourage thrombosis(blood clotting).
Cigarette smoking is a very important cause of disease of leg arteries which leads to pains in the leg on walking. This condition is very rare in non-smokers. It may lead to loss of a leg by amputation, but this rarely occurs in those who have stopped smoking. In men under the age of forty-five, smoking are responsible for 80% of all coronary deaths.
There is now overwhelming evidence that healthy eating is important not only for preventing heart disease, but also for good general health. This means eating more bread, cereals, chicken, fish skimmed and semi-skimmed milk , fruit and vegetables of all kinds and less fat( particularly saturated fat), less sugar and salt. Exercise is very necessary for health. Brisk walking is an ideal way to reduce the risk of coronary heart disease. It makes us healthier all round and gives us more energy to do things we enjoy in our life. As we get older, blood pressure and heart rates tend to t rise- which can be very risky in later life. Walking helps to keep our blood pressure down. Studies have shown that regular walkers produce less LDL cholesterol- the fat in the blood clearly linked with heart disease- and more LDL cholesterol which is better for us. Regular brisk walking also wards off aching joints and potential bone problems such as osteoporosis -the unpleasant and often painful thinning of the bones. For walking we do not need any special equipment just a pair of strong and comfortable shoes , which support our heels and arches. Exercise build the strength of one's heart muscle so that it can work more easily. Exercise can also have beneficial effects of high blood pressure and reduced blood cholesterol level. Everyone wants to feel fit and healthy and want to lead an active life. Because living an active life can give more energy, greater stamina, stronger and more toned muscles, a lower risk of heart disease and stroke, a lower risk of osteoporosis( brittle bones), improved posture, improved confidence, a need a better shape and appearance.
Stress condition is very bad for a man. Stress makes the body to produce adrenaline which stimulates the heart to beat faster. The best way to deal with stress is to remove the cause if it, but this often far from easy. It usually helps at least to talk to someone about the problem and it may lead to getting together with other people to tackle the situation. One should make friendship with good people. One must avoid meeting bad people such liars, back-bitters, riba taker, corrupt people, flatterers. Such people are very common in Pakistani society. We must recite the Holy Quran, offer five times prayers, we must avoid taking loan from others or from the banks.