Disorders of circulatory system
High Blood Pressure (Hypertension)
- Hypertension is the term for blood pressure that is higher than normal (120/80).
- 120 mm Hg is the systolic, or pumping, pressure and 80 mm Hg is the diastolic, or resting, pressure.
- If repeated checks of blood pressure of an individual is 140/90 (140 over 90) or higher, it shows hypertension.
- High blood pressure leads to heart diseases.
Coronary Artery Disease (CAD):
- Coronary Artery Disease, often referred to as atherosclerosis, affects the vessels that supply blood to the heart muscle.
- CAD caused by deposits of calcium, fat, cholesterol and fibrous tissues, which makes the lumen of arteries narrower.
- It is also called ‘angina pectoris’.
- A symptom of acute chest pain appears when no enough oxygen is reaching the heart muscle.
- Angina can occur in men and women of any age.
- It occurs due to conditions that affect the blood flow.
- Heart failure means the state of heart when it is not pumping blood effectively enough to meet the needs of the body.
- Heart failure is not the same as cardiac arrest or a heart attack.
- Cardiac arrest is when the heart stops beating, whereas heart attack is when the heart muscle is suddenly damaged by an inadequate blood supply.
Fig. Coronary artery disease