High Blood Pressure Causes Heart
Attack Myocardial infarction
Heart attack is called as Myocardial Infarction in medical
terminology. Heart is supplied by right and left coronary arteries. Whenever these
arteries are blocked, blood supply to heart stops and wall of heart damages, result is Heart Attack with symptoms
of severe constricting chest pain radiating to
left arm jaw or shoulder, profuse sweating, vomiting, and feeling of anxiety. If the blood supply is cut off for more than a few minutes, muscle cells suffer
permanent injury and die. This can kill or disable someone, depending on how much heart
muscle is damaged.
There are 4 major risk factors which are responsible for
this heart attack. What are those?
Hypertensionalso called as High Blood Pressure, Hypercholesterolemia,
Diabetes, and Smoking. In this article our main focus is High Blood Pressure. How does High
blood pressure play role in causing Heart Attack. Remember, whenever coronary blood supply
will be decreased or blocked, heart attack will take place. Arteries can be blocked by two different ways.
Atherosclerosis and second cause is Artery spasm. Now lets discuss process of Atherosclerosis.
Atherosclerosis is a type of arteriosclerosis.
The name comes from the Greek words athero (meaning gruel or paste) and sclerosis (hardness). It is a process of formation of plaque inside the wall of blood vessel. Plaque is collection of fatty substances, cholesterol, cellular waste products,
calcium and fibrin (a clotting material in the
blood). When person gets old, process of atherosclerosis starts. Thickening of blood vessels is called atherosclerosis. So far we have just talked about
thickening of vessels. How vessels get
Now what next, plaque can undergo following changes. Either bleeding (hemorrhage) into
the plaque , blood enters into wall of blood vessel, thus it gets more
thickened and block the vessel or plaque gets damage
and platelet(Cells which helps in clotting
process) comes and aggregate on the plaque where it
damages. Thus causing more narrowing of vessel. We were talking about blood pressure
causing atherosclerosis. Yes, it is main risk factor. Actually it is high blood pressure which
causes injury to these plaques, so after injury
to these plaques, platelet comes to injured areas and further narrow the blood
vessels.Because of the damage, over time fats, cholesterol,
platelets, cellular debris and calcium are also deposited in the artery
wall. These substances may stimulate the cells of the artery wall to produce still other
substances like smooth muscles. This results in more cells
accumulating in the innermost layer of the artery wall where the atherosclerotic
lesions form. These cells accumulate, and many of them divide. At the same time, fat builds up
within and around these cells. They also form
Atherosclerosis affects large and medium sized
The type of artery and where the plaque develops varies with each
person.Atherosclerosis is a slow, progressive disease that may start in children as well. In
some people this disease progresses rapidly in their third
decade. In others it doesn't become threatening until they're in their 50s or 60s.
If atherosclerosis takes place in heart vessels . oxygen supply
to the heart muscles decreases, resulting in heart wall damage, called as Heart
Second cause of decreased blood supply is artery spasm. Sometimes a coronary artery
temporarily contracts or goes into spasm. When this happens the artery narrows and blood flow to the heart muscle decreases
or stops. A spasm can occur in normal-appearing blood vessels as
well as in vessels partly blocked by atherosclerosis. A severe spasm can cause a heart attack.
So always keep your blood pressure under controlled limits,
otherwise you can be a victim of Heart Attack.