These are those drugs which is used to treat angina pectoris.
An imbalance between the myocardium's oxygen demand and supply results in angina pectoris, it is a symptom of myocardial ischemia.
Angina pectoris is also called ischemic chest pain.
It is severe chest pain, and this pain is due to ischemia (lack of 02).
Ischemia is reduced blood flow to any organ or tissue of the body, reducing it of oxygen.
This pain occurred in the chest and left side of body. Then this pain is spreading to neck, back, jaw and limbs.
Patients may also feel unusual symptoms including indigestion, nausea, vomiting, or diaphoresis.
Causes-
It is caused when Myocardium (heart muscle) is not getting enough oxygen and blood supply.
Coronary artery disease is the most typical cause of decreased blood flow to the heart muscle.
Types of Anginas
I. Stable angina-
Also knows as classical angina.
It is most common type of angina
These attacks are predictable and caused by exercise, emotion and increase workload.
The main cause of classical angina is significant atherosclerosis in the coronary arteries, which provide blood to the heart's deeper tissues.
This result in decrease coronary artery perfusion
II. Variant Angina-
Also known as vasospastic and prinzmetal angina.
It is uncommon and unpredictable.
Attacks occur at rest. And the pain is inducing at rest.
Caused by coronary vasospasm, due to this blood supply decreases and results decrease in oxygen.
In this type of angina, drug is used to relieving vasospasm.
III. Unstable Angina
Attacks that happen while you're at rest rapidly increase in both duration and intensity.
The most frequent cause of unstable angina is atherosclerosis.
The accumulation of fatty material, known as plaque, on the artery walls is known as atherosclerosis.
As a result, arteries grow more rigid and thin. Chest pain might result from the constriction decreasing blood supply to the heart.
Treatment of angina
This can be treated by changing lifestyle like increase in physical exercise, decrease in Weight, avoid smoking, and avoid intake of fatty acids.
This can be treated by coronary artery bypass surgery.
This can be treated by medication like anti-anginal drugs like ca++ ion channel blocker, vasodilators, and beta blockers etc.