Реферат по предмету "Иностранный язык"


Angina Pectoris Essay Research Paper Angina PectorisAngina

Angina Pectoris Essay, Research Paper

Angina Pectoris

Angina pectoris is a medical condition that literally means a choked

chest. The victim feels acute pain in his chest for a few seconds, and then it

goes away. This occurs when myocardium cells, the muscle portion of your heart,

are temporarily denied oxygen. At this stage they do not die, but maybe weakened.

If left untreated and the disease continues, a serious condition known as

myocardial infraction or commonly called a heart attack may occur. This can

severely damage the heart’s functionality. Which in turn effects our well being.

We should be educated about the risks that go along with our cardiovascular

system.

The most common cause of the condition angina pectoris is over

consumption of cholesterol. This chemical is only needed in minute amounts, but

is often eaten in every meal. In the body, cholesterol is responsible for the

stability of plasma membranes of cells, and hormones are produced from it. If

consumed at higher rate then needed it is stored in the tunica interna, the

innermost layer, of blood vessels. As it is stored it starts to build up

eventually clogging the vessel. As a result of this all cells feed by the

vessel die because of a lack of oxygen. If this condition is found early, it

can be corrected with surgical procedures or, in some minor cases, corrective

procedures. Surgical procedures include bypass, laser and balloon surgery. In

bypass surgery a vein is removed from the lower leg and a clogged vessel is

worked around. Often in type of surgery the whole mid section of the body is

cut and the ribs are pulled back, very painful with a very slow recovery. Some

hospitals have now implemented a new technique where only a small hole is made

and everything is done via a view screen. In balloon surgery a balloon is

inserted into the vessel with the clog and is inflated. When this occurs the

vessel is damaged, this causes the cells to repair the damage and clear the clog.

This is not as successful as other surgery techniques and is often done several

times before a positive result is seen. Laser surgery is the most recent

development. Here they use a laser to actually scrape the build up from the

vessel. This surgery is one of the most expensive surgeries available today.

Corrective procedures include changes in lifestyle. These can include food

intake, exercise, and stress-related issues. Food intake is largely the answer

to correcting this situation. As shown above excessive intake of cholesterol

can increase the risk of a heart attack. Coupled with excessive salt intake can

produce another problem known as hypertension or commonly called high blood

pressure. This can further increase the risk of a heart attack since the heart

has to work harder to achieve a homeostatic state. Therefore the heart is

working with less efficiency. For example a runner’s heart may beat 64 times a

minute. A person with hypertension heart rate may be 98. The runner’s heart

is working with more efficiency; therefore it does not need to beat as fast as

the person with hypertension. The person with hypertension has a high heart

rate since it cannot pump as much blood per contraction. Exercise is another

corrective procedure prescribed since it increases cardiovascular fitness. As

seen above, cardiovascular fitness can reduce the risk of heart attacks.

Stress-related issues can increase blood pressure for unknown reasons and

therefore can also increase the risk of a heart attack. All these factors can

influence the health of our cardiovascular system therefore care must be taken

to ensure proper function. This includes handling stress with care, eating, and

exercising right.




Не сдавайте скачаную работу преподавателю!
Данный реферат Вы можете использовать для подготовки курсовых проектов.

Поделись с друзьями, за репост + 100 мильонов к студенческой карме :

Пишем реферат самостоятельно:
! Как писать рефераты
Практические рекомендации по написанию студенческих рефератов.
! План реферата Краткий список разделов, отражающий структура и порядок работы над будующим рефератом.
! Введение реферата Вводная часть работы, в которой отражается цель и обозначается список задач.
! Заключение реферата В заключении подводятся итоги, описывается была ли достигнута поставленная цель, каковы результаты.
! Оформление рефератов Методические рекомендации по грамотному оформлению работы по ГОСТ.

Читайте также:
Виды рефератов Какими бывают рефераты по своему назначению и структуре.