Does relaxation breathing help when you have an angina attack?

No, relaxation breathing is not a recommended approach for managing an angina attack. Angina is a symptom of underlying coronary heart disease and occurs due to a temporary reduction in blood flow to the heart muscle. During an angina attack, it's important to seek immediate medical attention and follow your doctor's recommendations for treatment. Relaxation breathing techniques may be beneficial for managing stress and anxiety in general, but they are not a substitute for medical care during an angina attack.