is present at birth; an example of this is the so called 'blue baby'. It accounts for 2 p.
There are four important types of heart diseases. Firstly, congenital heart disease, which
10)
cent of all heart diseases. The second type, rheumatic, is quite common in some 3080 40
per cent of all heart cases. It is caused by an infection of the throat which, is untreated
causes damage to the heart. The symptoms are a chronic sore throat, painful joints and
high fever. This disease is widespread in many developing countries, due to poor living
conditions and overcrowding
High blood pressure is also an important cause of heart disease, of the third type,
hypertensive, and accounts for some 15 to 25 per cent of all heart cases. It is believed that
among other factors such as stress and smoking, a higher salt intake in the diet leads to
blood pressure
Degenerative heart disease, commonly known as ischaemic heart disease, is the cause of
heart attacks, and is one of the most important health problems among adults throughout
the world. Ischaemic heart disease is due to blocking of the two blood vessels which
supply blood to the heart muscle. At birth they are wide open, but in a diseased state
one or more of these vessels is completely blocked, leading to defective blood supply to
various points of the heart. This results in the well-known symptom of pain on emotional
or physical stress called angina. What causes this is the laying down of a fatty substance,
called cholesterol, in the wall of the artery, which gradually blocks the vessel and may
close it completely
How does cholesterol get into the blood? It results partly from a diet rich in fats of animal
origin, such as butter, cream cheese, rich cuts of beef, ham and bacon, egg yolk, and
saturated cooking fats, such as ghee. (Based on the Heart in Sarah Freeman, Study
Strategies in English) in this passage I want 2 wH questions and 2 yes/ no questions and 1 question tag
Answers
Answer:
Cyanotic heart disease refers to a group of many different heart defects that are present at birth (congenital). They result in a low blood oxygen level. Cyanosis refers to a bluish color of the skin and mucous membranes.
Causes
Normally, blood returns from the body and flows through the heart and lungs.
Blood that is low in oxygen (blue blood) returns from the body to the right side of the heart.
The right side of the heart then pumps the blood to the lungs, where it picks up more oxygen and becomes red.
The oxygen-rich blood returns from the lungs to the left side of the heart. From there, it is pumped to the rest of the body.
Heart defects that children are born with can change the way blood flows through the heart and lungs. These defects can cause less blood to flow to the lungs. They can also result in blue and red blood mixing together. This causes poorly oxygenated blood to be pumped out to the body. As a result:
The blood that is pumped out to the body is lower in oxygen.
Less oxygen delivered to the body can make the skin look blue (cyanosis).