High blood pressure or hypertension is called the "silent killer" because most individuals who have it don't feel sick. A minority of people will have signs and symptoms such as headache, dizziness, or blurred vision. Dangers of hypertension, persistent or episodic, could include a number of things.
Cerebrovascular accident or CVA is when a blood vessel in the brain is ischemic or the blood vessel ruptures. Hypertension, especially undiagnosed or under treated hypertension is a major cause of hemorrhagic CVA.
Hypertension also increases your susceptibility to cardiovascular disease like acute myocardial infarction or AMI. Hypertension causes a vasoconstrictive effect on blood vessels that supply the heart with blood, this leads to decreased blood flow to the myocardium.
Consider, basically, what high-blood pressure means. It means the heart is working harder than it needs to in order to pump blood throughout the body. The dangers go beyond the risk of a heart attack (which is usually the most prominent and common result of prolonged high blood pressure). Every organ in the body is affected by the blood flow it receives. Any time the cardiac system is not functioning properly, you can bet the rest of the body suffers.
Some dangers include:
- damage to the lining of arteries which can lead to hardening of the arteries
- weakened arteries can lead to an aneurysm
- coronary artery disease which can lead to a fatal heart attack
- enlarged left heart due to the overworking of pumping blood OUT
- heart failure - not necessarily a heart attack - but the simple speeding up of the heart's aging process through working too hard for too long
- blood clots - which can lead to strokes
- dementia as a result of a lack of blood flow to the brain which is the result of blocked or hardened arteries
- there are also a number of kidney problems which can result from untreated high blood pressure.
Blood pressure is the pressure that blood exerts against the walls of arteries. For proper function and maintenance of body health the blood pressure must be maintained within a given range. Blood pressure, called hypertension in medical term refers to condition when blood pressure is raised above normal limits permanently or for extended periods.
Heart pressure is often called a silent killer because in most cases it produces no noticeable symptoms and remains undetected for long periods until dangerous complications occur. The danger of permanently high blood pressure include bursting of some arteries, hardening of the arteries, making the heat work harder increasing the risk of heart attack, and kidney failure by reducing the flow of blood in kidneys.
Bursting and hardening of arteries leads to many different complications depending on the particular artery affected. For example, most strokes strokes result from damage to the blood vessels caused by high blood pressure hardening of the arteries. Similarly heart attack may be caused by blockage of blood supply to heart due hardening of artery supplying blood to the heart.