Aortic dissection: a case-based approach

The presentation

Imagine an adult who is suddenly gripped by intense chest pain that reaches its worst in an instant. Unlike a slow build-up, this pain is at full force from the start, and it is often described as tearing, ripping or sharp. It may sit behind the breastbone but frequently moves through to the back, between the shoulder blades, and can travel down as the tear extends. The person may look grey, sweaty and frightened, and can feel faint. Some notice a difference between their two arms, weakness or numbness down one side, difficulty speaking, or severe tummy pain, depending on which branches of the aorta are affected. This sudden, severe, migrating tearing pain — especially when the person looks very unwell — is the alarming pattern that must never be brushed off as muscle strain or indigestion.

Why it is a life-threatening emergency

The aorta carries blood from the heart to the whole body under high pressure. In a dissection, the inner lining tears and blood surges into the wall itself, splitting its layers apart. This false channel can burst, causing catastrophic internal bleeding, or it can block the branches that supply the brain, heart, kidneys, gut, arms and legs, starving those organs of blood. It may also damage the heart valve or leak blood around the heart. Any of these can kill quickly, and the risk of death rises with every passing hour if the most dangerous type is not treated. Treatment is a hospital emergency and may involve urgent scans, tight control of blood pressure and, for many dissections, emergency surgery. This is why suspicion alone justifies an immediate 999 call — minutes matter.

When to call 999

Call 999 immediately for sudden, severe chest or upper back pain, particularly if it feels tearing, ripping or sharp and is at its worst straight away. Other red flags include pain that spreads to the back, neck, tummy or moves as time passes, feeling faint, collapsing, becoming very short of breath, or having stroke-like symptoms such as slurred speech, face drooping or weakness on one side alongside the pain. A big difference in how the two arms feel, or a cold, pale limb, is also concerning. Do not drive yourself, do not wait to see if it eases, and do not assume it is heartburn or a pulled muscle. While waiting for the ambulance, keep still, stay calm, and tell the call handler clearly that the pain came on suddenly and feels tearing — this helps the team respond fast.

Who is more at risk

Aortic dissection is uncommon and often strikes without warning, but several things raise the risk. The single biggest is long-standing high blood pressure, which stresses the artery wall over years. Others include a bulge in the aorta (an aneurysm), a previously known aortic problem or heart surgery, and inherited conditions that weaken connective tissue, such as Marfan syndrome. A bicuspid aortic valve, pregnancy, cocaine or other stimulant use, and heavy straining can all contribute, and risk rises with age and is higher in men. A family history of dissection or sudden unexplained death matters too. Knowing these risks is useful, but the crucial message is universal: sudden severe tearing chest or back pain is an emergency for anyone, and being lower risk does not make it safe to wait.

The safe pathway

The practical rule is that sudden, severe chest or back pain is never something to sit on at home. While many chest pains have less serious causes, aortic dissection and heart attack can look similar at first and both are emergencies, so the safe action is the same: call 999. Do not try to distinguish them yourself, do not take a wait-and-see approach, and do not delay for a GP appointment. Milder, familiar aches that you can link to muscle strain or that come and go with movement can be discussed with NHS 111 or a GP, but anything sudden, severe, tearing, or coming with faintness, breathlessness or stroke-like symptoms needs an ambulance now. Aortic dissection is rare, but because it can be fatal within hours, acting fast on suspicion is what saves lives.