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The HeartINTRODUCTIONIn todays society people are gaining medical knowledge at quite a fast pace Treatments cures and vaccines for various diseases and disorders are being developed constantly and yet coronary heart disease remains the number one killer in the world The media today concentrates intensely on drug and alcohol abuse homicides AIDS and so on What a lot of people are not realizing is that coronary heart disease actually accounts for about 80 of all sudden deaths In fact the number of deaths from heart disease approximately equals to the number of deaths from cancer accidents chronic lung disease pneumonia and influenza and others COMBINED One of the symptoms of coronary heart disease is angina pectoris Unfortunately a lot of people do not take it seriously and thus not realizing that it may lead to other complications and even death THE HUMAN HEART In order to understand angina one must know about our own heart The human heart is a powerf ul muscle in the body which is worked the hardest A double pump system the heart consists of two pumps side by side which pump blood to all parts of the body Its steady beating maintains the flow of blood through the body day and night year after year non-stop from birth until death The heart is a hollow muscular organ slightly bigger than a persons clenched fist It is located in the centre of the chest under the breastbone above the sternum but it is slanted slightly to the left giving people the impression that their heart is on the left side of their chest The heart is divided into two halves which are further divided into four chambers the left atrium and ventricle and the right atrium and ventricle Each chamber on one side is separated from the other by a valve and it is the closure of these valves that produce the lubb-dubb sound so familiar to us see Fig 1
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