APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -Angina is caused by reduced blood flow to the heart muscle. Blood carries oxygen, which the heart muscle needs to survive. When the heart muscle isn’t getting enough oxygen, it causes a condition called ischemia. The most common cause of reduced blood flow to the heart muscle is coronary artery disease (CAD).

Detailed explanation-2: -Angina is chest pain or discomfort caused when your heart muscle doesn’t get enough oxygen-rich blood. It may feel like pressure or squeezing in your chest. The discomfort also can occur in your shoulders, arms, neck, jaw, abdomen or back. Angina pain may even feel like indigestion.

Detailed explanation-3: -Symptoms of low blood oxygen levels restlessness. dizziness. rapid breathing. chest pain.

Detailed explanation-4: -Jama. 1939; 113:477–482. [Crossref], [Google Scholar]] stated that administration of 100% O2 has a rapid pain-relieving effect in angina pectoris, and in 1940, Boland [5. Oxygen in high concentrations for relief of pain: In coronary thrombosis and severe angina pectoris.