Emergency — when to call 911 immediately
Pressure, squeezing, or crushing sensation in the centre of the chest · Pain spreading to jaw, left arm, right arm, back, or upper abdomen · Sweating, nausea, or vomiting with chest discomfort · Shortness of breath at rest · Sudden rapid or irregular heartbeat · Fainting or near-fainting · Sudden severe pain described as "worst of my life" (possible aortic dissection) · Chest pain in anyone with known heart disease or multiple cardiac risk factors
In a heart attack, every minute of continued coronary artery blockage destroys heart muscle. The median time from symptom onset to calling 911 in the U.S. is still over 2 hours — driven by denial, uncertainty, and fear. When in doubt, call. A false alarm is far preferable to a delayed diagnosis. Do not drive yourself — paramedics can begin treatment en route and alert the cath lab in advance.
Cardiac causes of chest pain
Heart attack (acute myocardial infarction)
A heart attack occurs when a coronary artery is completely blocked — usually by a ruptured atherosclerotic plaque and superimposed clot — cutting off blood supply to heart muscle. The pain is classically described as a pressure, squeezing, heaviness, or "elephant sitting on my chest" in the centre or left side, radiating to the left arm, jaw, or neck, lasting more than 20 minutes, and not relieved by rest or antacids.
Critically, 25–30% of heart attacks present atypically — with only breathlessness, fatigue, nausea, or vague abdominal discomfort. This is especially true in women, diabetics (where neuropathy can blunt pain sensation), and older adults.
Unstable angina
Chest pain from coronary artery disease that occurs at rest, is new in onset, or is worsening in frequency or severity. Unlike stable angina (predictable pain with exertion that resolves with rest), unstable angina signals plaque instability and imminent risk of heart attack. Requires emergency evaluation.
Stable angina
Predictable chest tightness or discomfort triggered by physical exertion or emotional stress — caused by narrowed coronary arteries that cannot adequately supply the increased demand. Typically resolves within 5 minutes of rest or with sublingual nitroglycerine. While not immediately life-threatening, stable angina requires medical evaluation and treatment.
Pericarditis
Inflammation of the pericardium (the sac surrounding the heart). Causes sharp, stabbing pain that worsens when lying flat and improves when leaning forward. Often viral in origin. The classic physical finding is a pericardial friction rub on auscultation. Usually self-limiting, treated with NSAIDs and colchicine.
Aortic dissection
A tear in the inner layer of the aorta — a catastrophic emergency. Characteristically causes sudden, severe, tearing or ripping pain in the chest or back, often migrating as the dissection extends. May present with blood pressure differences between arms. Requires immediate surgical or endovascular intervention. Mortality increases approximately 1% per hour without treatment.
| Cardiac cause | Pain character | Radiation | Urgency |
|---|---|---|---|
| STEMI heart attack | Pressure, crushing, >20 min | Arm, jaw, neck, back | 911 now |
| NSTEMI / unstable angina | Pressure, squeezing, at rest | Arm, jaw possible | 911 now |
| Aortic dissection | Sudden tearing, "worst ever" | Back, between shoulder blades | 911 now |
| Stable angina | Tightness with exertion, resolves with rest | Arm, jaw sometimes | See cardiologist |
| Pericarditis | Sharp, worse lying flat, better leaning forward | Shoulder sometimes | Same-day evaluation |
Pulmonary causes of chest pain
Pulmonary embolism (PE)
A blood clot blocking a pulmonary artery — the most dangerous pulmonary cause of chest pain. Presents with sudden onset pleuritic pain (sharp, worse with breathing), breathlessness, rapid heart rate, and sometimes haemoptysis (coughing blood). Risk factors include recent immobility, long-haul flight, surgery, cancer, pregnancy, and oral contraceptives. A large PE can cause sudden collapse — call 911.
Pneumothorax
Collapse of a lung — either spontaneous (typically in tall, thin young men) or traumatic. Causes sudden onset sharp pleuritic pain on one side, with breathlessness. A tension pneumothorax (pressure build-up compressing the other lung and heart) is a life-threatening emergency requiring immediate needle decompression.
Pneumonia and pleuritis
Pneumonia can cause pleuritic chest pain — sharp, one-sided, worse with breathing — alongside fever, productive cough, and general malaise. Pleuritis alone (inflammation of the pleural lining without infection) produces similar pain character.
Musculoskeletal causes
Musculoskeletal causes are the most common cause of chest pain presenting to primary care — yet they are often only diagnosed after cardiac causes have been excluded. They are rarely dangerous but can be very uncomfortable.
Costochondritis
Inflammation of the cartilage connecting the ribs to the sternum. Causes localised, reproducible tenderness — pressing on the affected area reproduces the pain exactly. No radiation. Worsened by movement and deep breathing. Managed with NSAIDs and heat. Can last weeks to months but is benign.
Musculoskeletal strain
Overuse or injury to chest wall muscles (e.g., after exercise, heavy lifting, or a new activity) causes sharp or aching pain localised to specific areas, clearly worsened by movement and palpation. Rest and NSAIDs are effective.
Tietze syndrome
Similar to costochondritis but with visible or palpable swelling at the affected costo-sternal junction. Usually affects a single joint, most commonly the second or third rib. Self-limiting — treated with NSAIDs or local corticosteroid injection in refractory cases.
Digestive causes
Gastro-oesophageal reflux disease (GORD/GERD)
Probably the most common non-cardiac cause of chest pain. Burning discomfort (heartburn) typically behind the breastbone, often after meals, when lying flat, or after alcohol. May radiate upward into the throat. Can be difficult to distinguish from cardiac pain — even nitroglycerine can relieve oesophageal spasm. GERD chest pain is usually relieved by antacids within minutes.
Oesophageal spasm
Uncoordinated contractions of the oesophagus causing severe, cramping chest pain — can be triggered by swallowing hot or cold liquids, and may radiate to the back. Can mimic angina closely, including relief with nitroglycerine.
Peptic ulcer disease
Epigastric (upper abdominal) pain that can radiate into the chest. Typically a burning or gnawing pain related to meals — better or worse depending on whether food buffers acid. Night-time waking with pain is characteristic.
Anxiety, panic attacks, and other causes
Panic attacks and anxiety
Anxiety and panic attacks are a very real and common cause of chest pain — affecting millions. The pain is typically sharp, left-sided, variable in location, and accompanied by palpitations, tingling in the hands or face, dizziness, shortness of breath, and an overwhelming sense of impending doom. Panic attack chest pain results from hyperventilation (lowering CO₂) and sympathetic nervous system activation causing genuine chest wall muscle tension.
Crucially: anxiety should only be attributed as the cause after cardiac causes have been excluded. Cardiac disease and anxiety often coexist, and cardiac disease is more common in people with anxiety disorders.
Shingles (herpes zoster)
Before the rash appears, shingles affecting thoracic dermatomes can cause severe unilateral burning or stabbing chest pain — sometimes for several days before the characteristic blistering rash appears along one side of the chest wall. A history of chickenpox and the dermatomal distribution are clues.
Chest pain in women: what's different
Women with heart attacks are significantly more likely to present without classic crushing chest pressure. The most common presentation in women includes:
- Shortness of breath (may be the only symptom)
- Unusual fatigue — sometimes days before the event
- Nausea or vomiting
- Pain in the jaw, neck, or upper back
- A vague sense that "something is wrong"
Studies consistently show that women wait longer before calling 911, are more likely to be initially misdiagnosed, and experience longer delays to treatment in the emergency department. If you are a woman experiencing unusual symptoms that feel different from your normal baseline — trust your instincts and seek care promptly.
How doctors assess chest pain
| Investigation | What it detects | Time to result |
|---|---|---|
| ECG (12-lead) | ST elevation (STEMI), ST depression, arrhythmias, old MI changes | Minutes — done immediately |
| High-sensitivity troponin (hs-cTn) | Heart muscle damage — rises within 1–3 hours of MI onset | 1–3 hours — serial testing |
| Chest X-ray | Pneumothorax, pneumonia, aortic widening, pulmonary oedema | 30–60 minutes |
| D-dimer | Clot marker — high sensitivity for PE (low specificity) | 1–2 hours |
| CT pulmonary angiography (CTPA) | Gold standard for pulmonary embolism | 30–60 minutes |
| CT aorta | Aortic dissection — urgent if suspected | 30–60 minutes |
| Echocardiogram | Wall motion abnormalities, pericardial effusion, valve problems | 30–60 minutes |
| Coronary angiography | Direct coronary visualisation — enables immediate stenting | Varies — cath lab activation |
Emergency departments use validated risk stratification tools — such as the HEART score (History, ECG, Age, Risk factors, Troponin) — to categorise patients into low, intermediate, and high risk, guiding the urgency and extent of further investigation.
Frequently asked questions
Classic heart attack pain is a pressure, squeezing, or heaviness in the centre of the chest, lasting more than 20 minutes, often radiating to the left arm, jaw, neck, or back, accompanied by sweating, nausea, or shortness of breath. However, heart attacks can present with only breathlessness, extreme fatigue, or jaw pain — especially in women, diabetics, and older adults. When in doubt, always call 911. A negative assessment is far better than a missed heart attack.
Yes — anxiety and panic attacks are a very common and real cause of chest pain. The pain is typically sharp, variable, left-sided, and accompanied by palpitations, tingling, dizziness, and a sense of impending doom. However, anxiety as a cause should only be attributed after cardiac causes have been carefully excluded. The two conditions frequently coexist.
Pleuritic chest pain is sharp and stabbing, worsens significantly with each breath in, and may also worsen with coughing or movement. It is caused by inflammation of the pleura (the lining around the lungs). Causes include pleuritis, pneumonia, pulmonary embolism, and pneumothorax. Sudden onset pleuritic pain with breathlessness — particularly with risk factors for blood clots — should be evaluated urgently for pulmonary embolism.
Yes — if you are not allergic to aspirin and suspect a heart attack, chewing (not swallowing whole) one regular-strength 325 mg aspirin or four low-dose 81 mg aspirin while waiting for the ambulance is recommended. Chewing rather than swallowing achieves faster absorption. Do not take aspirin if you are allergic or have been told not to by your doctor. This does not replace calling 911 — do both simultaneously.
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