What is the main characteristic of angina pectoris?

The main characteristic of angina pectoris is chest pain due to reduced blood flow. Angina pectoris occurs when the heart muscle doesn't receive enough oxygen-rich blood, often as a result of coronary artery disease. This lack of blood flow can cause feelings of pressure, squeezing, or pain in the chest, which may also radiate to the shoulders, neck, arms, back, or jaw. The key aspect of angina is that it is typically episodic; it can be triggered by physical activity, stress, or other factors that increase the heart's demand for oxygen. Understanding this characteristic is crucial for recognizing angina and differentiating it from other conditions that may cause chest pain, such as heart attacks or gastrointestinal issues.