You should worry about chest discomfort, and treat it as an emergency, when it is severe or crushing, lasts more than fifteen minutes, spreads to the arm, neck or jaw, or comes with sweating, nausea or breathlessness. In those situations you should call 999 without delay, because they may signal a heart attack. Most chest discomfort, however, is not a heart attack and not an emergency. It is caused by muscular strain, acid reflux, anxiety or minor chest wall problems. The real skill lies in telling the two apart, and there are some reasonably reliable patterns that help.
Chest discomfort is one of the most common reasons people worry about their heart, and one of the most common reasons they are referred to me. Over more than 20 years as a Consultant Cardiologist at Kingston Hospital, much of that as Clinical Lead of the department, and across my private clinics at Parkside, The New Victoria, Cleveland Clinic London and Heartsure, I would estimate that around half the patients sent to me with chest discomfort turn out to have a non-cardiac cause. That is genuinely reassuring, but it is only known after assessment, which is why the safest approach to worrying chest discomfort is to have it evaluated rather than to talk yourself into or out of it alone.
The chest discomfort that is always an emergency
Some patterns of chest discomfort should never be watched and waited on. Discomfort that is severe, that feels like a heavy pressure, tightness or crushing sensation in the centre of the chest, and that lasts more than a few minutes needs an emergency response. This is especially true when it spreads to the arm, neck, jaw or back, or is accompanied by sweating, nausea, vomiting, breathlessness or a feeling of impending doom. These are the hallmarks of a possible heart attack, and the correct action is to call 999 immediately.
The instinct many people have in this situation is to wait and see whether it passes, to drive themselves to hospital, or to avoid making a fuss. Each of these can be dangerous. What I stress to patients and their families is that acting quickly on this pattern matters more than being certain, because when heart muscle is being starved of blood, the treatment that saves it is time-critical, and every minute of delay costs muscle. It is far better to call an ambulance for what turns out to be indigestion than to wait at home during a heart attack. Do not drive yourself, because if you lose consciousness at the wheel you endanger yourself and others, and an ambulance can begin treatment on the way.
The reassuring patterns that usually point away from the heart
Just as some patterns raise concern, others tend to point away from a cardiac cause, though never with complete certainty. Chest discomfort that can be reproduced by pressing on a specific spot on the chest wall is usually muscular or related to the chest wall rather than the heart. Discomfort that changes noticeably with breathing, coughing or twisting the torso is more likely to arise from the muscles, ribs or the lining of the lungs than from the heart. A sharp, stabbing pain lasting only a second or two is rarely cardiac, as heart-related discomfort tends to build and last longer.
Discomfort clearly linked to eating, particularly a burning sensation rising towards the throat, often points to acid reflux, and discomfort accompanying a period of stress or a panic attack frequently has an anxiety component. What I explain to patients is that these features shift the probability rather than settle the matter, because reassuring patterns make a cardiac cause less likely without excluding it entirely. This is particularly important in people with significant risk factors, where I keep a lower threshold for investigation even when the discomfort sounds musculoskeletal.
Understanding cardiac chest discomfort
Discomfort from the heart tends to have a recognisable character, and understanding it helps explain when to worry. The classic cardiac pattern is a pressure, heaviness or tightness rather than a sharp pain, felt in the centre of the chest, and often described as a weight, a band, or a squeezing sensation. When this comes on with exertion and eases with rest, it is the hallmark of angina, which is caused by narrowed coronary arteries limiting blood supply to the heart muscle when demand rises.
The predictability of angina is one of its most useful features. It typically appears with a certain level of effort, such as walking uphill or climbing stairs, and settles within a few minutes of stopping. Drawing on the many patients I have assessed for chest discomfort, asking what brings the discomfort on and what makes it stop works better than asking how severe it is, because the trigger and the pattern reveal far more about whether it is cardiac than the intensity does. A moderate discomfort that reliably appears on exertion and settles with rest concerns me more than a severe, fleeting pain with no relationship to activity.
The cardiac causes that are not a heart attack
Not all cardiac chest discomfort comes from narrowed arteries or signals a heart attack. Pericarditis, inflammation of the sac surrounding the heart, produces a sharp chest discomfort that is characteristically worse when lying flat and eased by sitting forward, and it often follows a viral illness. This positional quality gives it a very different pattern from the exertional discomfort of angina, and recognising the difference is part of what a proper assessment provides.
Other cardiac and vascular conditions can also cause chest discomfort, including problems with the heart valves, inflammation of the heart muscle, and, rarely but seriously, a tear in the wall of the aorta. Each has its own pattern, and each requires a different response. What matters for the person experiencing discomfort is not diagnosing themselves precisely, but recognising that chest discomfort has many possible cardiac causes beyond a heart attack, some of which still need timely assessment even when they are not immediately life-threatening.
The common non-cardiac causes
Reassuringly, the majority of chest discomfort has a non-cardiac origin. Musculoskeletal problems are among the most common, arising from strained chest wall muscles, inflammation where the ribs meet the breastbone, or minor injuries, and these typically produce discomfort that is tender to touch and worsened by movement. Acid reflux and other digestive conditions are another frequent cause, producing a burning discomfort that can mimic cardiac pain closely enough to send many people to hospital.
Anxiety and panic attacks commonly cause chest discomfort, often accompanied by a racing heartbeat, breathlessness and tingling, and the discomfort is entirely real even though the heart is structurally normal. Respiratory conditions, including chest infections and inflammation of the lung lining, can cause discomfort that is worse on breathing in. What I emphasise to patients is that a non-cardiac cause is the most likely explanation for most chest discomfort, but the overlap in symptoms is real enough that worrying features still deserve assessment rather than assumption.
Why risk factors change how much to worry
The same chest discomfort carries a different weight depending on who is experiencing it, and this is central to knowing when to worry. Discomfort that might be confidently attributed to muscle strain in a fit twenty-five-year-old with no risk factors warrants far more caution in a sixty-year-old smoker with high blood pressure, high cholesterol and a family history of heart disease. The presence of cardiac risk factors raises the likelihood that chest discomfort is cardiac, and lowers the threshold at which it should be investigated.
This is why I always consider chest discomfort in the context of the whole person rather than the symptom in isolation. What I explain to patients is that risk factors change the maths, because the more risk factors present, the more seriously any chest discomfort should be taken, even when its character seems reassuring. Someone with diabetes deserves particular care, as diabetes can blunt the usual warning discomfort and make cardiac symptoms milder or more unusual than expected.
How I assess chest discomfort in clinic
When a patient comes to me with chest discomfort that is not an emergency, the assessment is built around determining whether the heart is the source. It begins with a detailed history, which does most of the diagnostic work, exploring the character of the discomfort, what brings it on, what relieves it, and the presence of any risk factors. This is followed by a clinical examination and a resting ECG, though I always explain that a normal resting ECG does not exclude coronary disease, because many people with significant narrowing have a normal ECG at rest.
Further tests are chosen to fit the individual. An echocardiogram assesses the heart muscle and valves, blood tests cover cholesterol, glucose and, where a heart attack is a concern, troponin, and a CT coronary angiogram provides a direct and highly accurate view of the coronary arteries when needed. Drawing on the patients I have investigated for exertional chest discomfort, a CT coronary angiogram works better than relying on symptoms and a resting ECG alone, because it shows the state of the arteries directly and can either confirm the cause or provide genuine reassurance that the arteries are clear. The aim throughout is to reach a clear answer, so that worrying discomfort is explained rather than left hanging.
When to seek urgent help and when to book an assessment
The distinction that matters most is between chest discomfort that needs an emergency response and chest discomfort that needs a considered assessment. Severe, prolonged or crushing discomfort, discomfort spreading to the arm, neck or jaw, or discomfort with sweating, nausea, breathlessness or collapse, all require calling 999 immediately. New chest discomfort that comes on at rest, or discomfort that is rapidly worsening, also needs urgent attention rather than a routine appointment.
Chest discomfort that is recurrent but brief, that comes on predictably with exertion and settles with rest, or that is longstanding and unexplained, warrants a proper cardiology assessment even though it is not an emergency. This exertional pattern in particular should never be ignored, because it can be the warning sign that precedes something more serious. Booking an assessment for this kind of discomfort is exactly the right response, allowing the cause to be identified while any underlying disease is still stable and highly treatable.
When to seek a cardiology opinion
A specialist assessment is worth arranging if you have chest discomfort brought on by exertion and relieved by rest, discomfort that spreads to the arm, neck or jaw, or discomfort accompanied by breathlessness, palpitations or dizziness. It is also worth arranging if you have significant risk factors alongside any chest discomfort, if you have been told your discomfort is not cardiac but remain unconvinced, or if longstanding chest discomfort has never been properly explained.
You can read verified feedback from patients I’ve seen if it helps you decide whether a private cardiology opinion is the right step for you.
Conclusion
Knowing when to worry about chest discomfort comes down to recognising a few key patterns. Severe, prolonged or crushing discomfort, particularly with sweating, nausea, breathlessness or pain spreading to the arm or jaw, is an emergency and needs an immediate 999 call. Discomfort that is reproducible by pressing, that changes with breathing or movement, or that is sharp and fleeting, usually points away from the heart, though never with complete certainty. Discomfort that comes on with exertion and settles with rest sits in between, not an emergency but a warning sign that deserves prompt assessment. Above all, chest discomfort should be judged in the context of your risk factors, and when in doubt, it is always safer to have it assessed than to worry alone or assume the best.
If you have chest discomfort that concerns you, or symptoms that have never been fully explained, you can contact me, Dr Arvind Vasudeva, on 020 8977 4826 to arrange an assessment. I consult at Parkside Hospital in Wimbledon, The New Victoria Hospital in Kingston, Cleveland Clinic London and the Heartsure Clinic, and you can book a convenient appointment here through my secretary Hannah. If your discomfort is severe or you suspect a heart attack, please call 999 rather than waiting for an appointment.