Chest tightness and high heart rate

A fast heartbeat may occur when the body is frightened, overheated, dehydrated, in pain, or responding to exertion. Anxiety and panic can tighten chest muscles and make the heartbeat feel forceful. Asthma or COPD can make breathing harder, which may drive the heart rate up. Acid reflux can cause burning or pressure behind the breastbone. Angina is chest discomfort caused by reduced blood flow to the heart; it can occur with activity and may spread to the arm, jaw, back, or shoulder. A symptom pattern alone cannot identify the cause.

Stop exertion and sit upright in a comfortable position. Loosen tight clothing and take slow, gentle breaths without forcing a deep breath. Note when the symptoms began, what you were doing, whether the heartbeat feels regular, and whether you have breathlessness, sweating, nausea, dizziness, or pain spreading elsewhere. Do not drive yourself if symptoms are severe or worsening. Arrange medical assessment for a new, repeated, or unexplained episode, even if it settles.

Call emergency services immediately for severe or persistent chest pressure, marked difficulty breathing, fainting, confusion, blue or grey lips, cold sweating, or pain spreading to the arm, jaw, back, or shoulder. Seek urgent help if a fast heartbeat continues with chest symptoms, especially after exertion or in someone with known heart or lung disease. Do not wait for anxiety medicine or an inhaler to work when red-flag symptoms are present.

Ask whether you need an examination, an electrocardiogram, or breathing tests; whether medicines, caffeine, nicotine, fever, or thyroid problems could contribute; and how to recognise your personal warning signs. Bring a list of medicines and a brief symptom record.