Angina Pectoris
Angina is chest pain that develops when not enough blood is flowing to a certain area of your heart. Your chest may feel squeezed or under pressure, simulating a heart attack. It's also known as ischemic chest pain or angina pectoris. 

It occurs when something obstructs your arteries or when there is insufficient blood flow in the arteries that carry oxygen-rich blood to your heart. It is a symptom of heart disease. 

Angina often disappears fast. Even so, it can be a symptom of a serious heart condition. To prevent a heart attack, it's critical to understand what's happening and what you can do. 

Angina stable. 
This happens most frequently. It might be triggered by stress or physical exertion. Usually, it just lasts a few minutes and when you sleep, it goes away. Although it isn't a heart attack, it may indicate that you're more likely to experience one. 

Erratic Angina 
This can be consumed at any time while you're not doing much. The discomfort may be severe and persistent, and it might recur frequently. It can be an indication that a heart attack is about to strike. 
Angina Microvascular. 
With this kind, there is no coronary artery obstruction but there is chest pain. Instead, it occurs because your heart isn't getting the blood it needs because your tiniest coronary arteries aren't functioning properly. Usually, the chest pain lasts for longer than 10 minutes.

Women are more prone to this type. 
Angina variety known as Prinzmetal's angina. This kind is uncommon. It might occur while you're asleep or relaxing at night. Your heart's arteries suddenly constrict or tighten. You should get it addressed because it can be really painful. 
The symptom is chest discomfort, however it has varied effects on different people. 
You might have:
Aching, burning, discomfort, dizziness, fatigue, a feeling of fullness in the chest, a sense of weight or pressure, nausea or vomiting, shortness of breath, a tightening sensation in the chest, and sweating.
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What is the typical course of treatment for angina?
Conventional medicine treats angina with medications (nitroglycerin, nitrites, and nitrates) that relax and widen arteries so that more blood can flow to the heart, or with other drugs (beta-blockers, calcium-channel blockers) that lessen the workload of the heart. Although these medications can reduce the symptoms, they have no effect on the underlying issue. Additionally, each of these drugs has the potential to have negative side effects. The other common treatment options are coronary bypass surgery, angioplasty, which uses a small inflatable device (a "balloon") to open blocked or restricted arteries, placing a stent, and using blood channels from other parts of the body to "bypass" (redirect) blockages in the coronary arteries.

All of these interventions are very costly, extreme measures that only slow the advancement of the disease temporarily.