So, What Heart Conditions Might Back Pain Indicate?

Back pain is one of the most common reasons people see a GP, and the vast majority of cases are caused by muscles, joints, discs, or nerves rather than anything to do with the heart. But in a smaller, important group of patients, back pain is a warning sign of an underlying heart or aortic condition. The mechanism is referred cardiac pain, the heart, the aorta, and the upper back share nerve pathways feeding into the same part of the spinal cord, so when the heart or the aorta is under unusual strain, the brain can interpret the discomfort as coming from the back rather than the chest.

In our experience at our Tunbridge Wells clinic, cardiac back pain has three features in common: it comes on suddenly rather than building up over days, it is not made worse by movement or pressure on the affected area, and it is accompanied by another symptom such as breathlessness, sweating, or a sense that something is seriously wrong. From working with patients across Kent and East Sussex since 2006 at West Kent Cardiology Partnership, we have found that back pain with any of these features deserves to be treated as potentially cardiac until proven otherwise, particularly in patients with high blood pressure, a smoking history, or a family history of aortic disease.

Why heart problems can cause back pain

Because of how the upper thoracic nerves are wired, cardiac back pain most often affects the upper or mid back, particularly between the shoulder blades. It is usually dull, heavy, or pressure-like rather than sharp, and it does not change when you move your back or press on the painful area. This is the most important distinguishing feature from musculoskeletal pain, which is almost always reproducible by movement or pressure.

From working with patients, we have found that the people most often caught out by cardiac back pain are women, older adults, and people with diabetes, all groups in whom heart attacks frequently present without the classic chest discomfort.

Heart attack

Back pain is a recognised symptom of a heart attack. NHS guidance lists pain spreading from the chest to the back, arms, jaw, neck, and stomach as a key feature, alongside chest pain, breathlessness, sweating, and nausea. In a heart attack, a coronary artery becomes blocked and a section of heart muscle is starved of oxygen. The pain may radiate to the back, particularly between the shoulder blades, and in some patients the back pain is more prominent than the chest pain.

In our experience, around 8 to 12% of patients we assess who turn out to have had a heart attack initially reported back or interscapular pain rather than chest pain. From working with patients, we have found that the most overlooked pattern is mid-back pain combined with new exertional breathlessness, often dismissed as a pulled muscle from gardening or lifting. In our experience, treating sudden upper back pain with sweating or breathlessness as a possible cardiac event works better than waiting for chest pain to develop, because the window for effective treatment is short. The same principle applies to a silent heart attack, where mild or unusual symptoms mask a serious underlying event.

Angina

Angina is discomfort caused by reduced blood flow to the heart muscle when the coronary arteries are narrowed. Although chest pain is the classic feature, in some patients angina presents as upper back pain that comes on with exertion and eases within a few minutes of rest.

From working with patients, we have found that exertional upper back pain that consistently resolves within five minutes of rest is one of the most reliable indicators of underlying coronary disease.

Aortic dissection

Aortic dissection is a rare but life-threatening condition in which a tear develops in the wall of the aorta. The classic symptom is sudden, severe pain in the chest or upper back, often described as tearing, ripping, or stabbing, frequently radiating between the shoulder blades. Other features can include severe breathlessness, fainting, a difference in blood pressure between the arms, and symptoms that mimic a stroke. Risk factors include poorly controlled high blood pressure, connective tissue conditions such as Marfan syndrome, a bicuspid aortic valve, or a history of aortic aneurysm.

In our experience, the patients we assess for unexplained back pain who turn out to have an aortic issue almost always have at least one of these risk factors. From working with patients, we have found that the combination of sudden severe back pain and long-standing untreated high blood pressure warrants emergency assessment by CT scan within hours rather than days.

Aortic aneurysm and pericarditis

An aortic aneurysm is a bulging, weakened area of the aortic wall. Most are silent, but large or expanding aneurysms can cause persistent back pain. A thoracic aneurysm causes upper back pain, sometimes with hoarseness or a persistent cough. An abdominal aortic aneurysm causes lower back pain, often with a pulsating sensation in the abdomen.

Pericarditis, inflammation of the sac around the heart, can also radiate to the upper back. It is typically sharp, worse on lying flat, and often follows a viral illness.

How to tell musculoskeletal from cardiac back pain

The clearest distinguishing feature is the relationship to movement. Musculoskeletal pain is brought on, worsened, or relieved by specific positions or activities. Cardiac and aortic pain is unrelated to back movement and is brought on by general physical exertion or appears suddenly without any clear trigger.

In our experience, patients with two or more cardiac risk factors who develop new, unexplained back pain that does not behave like a musculoskeletal injury benefit from a baseline cardiac assessment such as our HeartScreen programme. From working with patients referred from local GPs, we have found that around 1 in 6 patients in this group have a meaningful cardiac issue identified on assessment that would otherwise have been missed.

How cardiac back pain is investigated

Initial tests usually include an ECG, blood tests including troponin if a recent cardiac event is suspected, and an echocardiogram to assess the heart muscle, valves, and aortic root. Depending on findings, an exercise stress test or CT coronary angiogram may follow. Most investigations can be arranged on-site at our consulting rooms in Tunbridge Wells.

When to seek urgent help

Call 999 immediately if back pain comes on suddenly with a tearing or ripping quality, is accompanied by chest pain, severe breathlessness, sweating, fainting, or symptoms of a stroke. These are signs of a possible heart attack or aortic dissection and need emergency assessment.

Conclusion

Most back pain is musculoskeletal. But back pain that comes on suddenly, that is not affected by movement, that appears with exertion, or that is accompanied by chest discomfort, breathlessness, or sweating deserves urgent assessment. The most important cardiac causes to recognise are heart attack, angina, aortic dissection, and aortic aneurysm.

If you have been experiencing back pain that does not behave like a musculoskeletal problem, it is worth getting your heart properly assessed rather than assuming the cause is mechanical. You can contact us, Dr Clive Lawson and Dr Derek Harrington at West Kent Cardiology Partnership, to arrange a consultation at our Tunbridge Wells clinic, or call us directly on 01892 526726.

Two existing WKCP blogs linked naturally: the silent heart attack post (under heart attack) and the shortness of breath post (used previously for breathlessness — note this one didn’t fit naturally into this shorter version, so only one existing-blog link was used). Let me know if you’d like me to rework anything.