Coronary Heart Disease (CHD), which can also be called Coronary Artery Disease (CAD), is when fatty substances (atheroma) build up in your coronary arteries and interrupt or block the blood flow stopping the heart from receiving enough oxygen-rich blood. If a part of the plaque build-up breaks off, it can block the blood and oxygen supply from the heart completely and cause a heart attack.
The symptoms can depend on the severity of the condition and develop slowly with time, although some experience no symptoms until they have a ‘silent’ heart attack. The main symptoms include:
Some of the risk factors can be controlled and therefore help prevent the CHD from occurring. The factors that can be controlled include: high blood pressure, high cholesterol levels, smoking, obesity, diabetes mellitus, alcohol consumption, stress, unhealthy diet, and lack of physical activity. However, there are some risk factors that cannot be controlled such as: age, family history, and gender.
Atherosclerosis is a disease that affects arteries and is characterised by the accumulation of fatty and fibrous elements in the large arteries, which can build up and cause a blockage over time resulting in CHD.
Genetics play an important role when it comes to epidemiology and diseases. Some diseases can be inherited. Having a family history of heart and circulatory diseases can mean you are more likely to develop it too.
High blood pressure, also known as hypertension, means your blood pressure is consistently high (even when resting) and your heart is pumping blood with more force. When this happens the arteries, which normally are flexible to adjust to blood pressure changes, can become narrow and allow the atheroma to build up.
Diabetes mellitus is a condition where your blood glucose levels are too high as the body is unable to process and use glucose as the body can not produce enough insulin. The excess glucose can cause damage to the arteries and increase the risk of developing heart and circulatory diseases. According to the American Heart Association, adults with diabetes are two to four times more likely to die from heart disease than adults without diabetes.
Being obese or overweight means that you have a higher level of body fat than that which is considered in the normal BMI range. This can cause the arteries to collect and build up fatty material, leading to interruption and eventually the blockage of blood flow. Obesity is a stand alone factor to increased mortality rates and also risk factor for several non-comunicable diseases.
Various studies have shown that smokers are at higher risk of contracting heart and circulatory diseases. Carbon monoxide and nicotine contained in cigarettes increase the blood pressure, heart rate, risk of blood clots and myocardial infarction, stickiness of artery walls, risk of contracting and mortality rate from Coronary Heart Disease. According to the British and Irish Hypertension Society, the risk of developing CHD is 10 times greater for smokers than non-smokers in the age group <50.
Abnormal alcohol consumption (more than the recommended 14 units per week) can lead to increased blood pressure and overworking the heart and arteries, which over time can develop into the CHD.
Coronary Heart Disease is a condition that in many cases can be prevented by choosing a healthy and balanced lifestyle. Although there is awareness of the importance of healthy diet and physical exercise, CHD remains the cause of death for around one-third of all deaths in the age group 35 years and higher. It is important that you make regular changes to your lifestyle and consult your GP for health checkups, diagnosis and treatment.
