What does angina signify in a patient?

Angina signifies pain due to a lack of oxygen in the heart muscle. This condition occurs when the heart does not receive enough blood flow, typically because of narrowed coronary arteries, which limits the oxygen supply to the heart. The pain often manifests as a feeling of pressure or squeezing in the chest and may also radiate to other areas such as the arms or jaw. This discomfort is a warning sign that the heart is not getting the oxygen it needs, which can prompt medical evaluation and intervention to prevent more serious conditions, such as a heart attack.

In contrast, pain from a heart attack is typically more severe and may involve damage to the heart muscle itself due to prolonged lack of oxygen. Pain from an allergic reaction is usually related to histamine release and inflammation, while anxiety-related pain often stems from psychological stress rather than oxygen deprivation. Understanding these distinctions enhances the ability to respond effectively to cardiac-related emergencies.