The Women's Health Inquiry Project

Acute Coronary Syndromes in Women: Patterns, Pathways and Persistent Gaps

This piece is for general information and discussion only. It is not medical or legal advice.

1. Context: why this issue matters

Acute coronary syndromes occur when blood flow to the heart muscle suddenly reduces or stops. They include ST‑elevation myocardial infarction (STEMI), non‑ST‑elevation myocardial infarction (NSTEMI), myocardial infarction with non‑obstructive coronary arteries (MINOCA), spontaneous coronary artery dissection (SCAD) and microvascular infarction. National guidance treats these events as emergencies requiring rapid recognition.

Although these conditions can affect anyone, evidence from UK audits, reviews and investigations shows that women often experience different symptom patterns and longer diagnostic timelines. Many describe pressure, heaviness, aching, upper‑abdominal discomfort, breathlessness, nausea or fatigue rather than the central crushing chest pain commonly highlighted in training materials. Pain may occur in the back, shoulder or jaw. These presentations are repeatedly described in national reports but do not fit traditional expectations, making them more difficult to interpret in triage environments that prioritise classic descriptors.

Conditions that disproportionately affect women, including MINOCA, SCAD and microvascular disease, do not always produce changes detectable on routine tests. Coronary arteries may appear unobstructed on imaging, electrocardiogram (ECG) changes can be subtle and troponin levels may rise differently in women. Earlier research under‑represented women, shaping what is considered typical.

Investigations highlight delays at several points, including slower ECG acquisition, difficulty accessing repeat tests and uncertainty when angiography appears normal despite ongoing symptoms. Women frequently report being told symptoms may be anxiety, stress or indigestion. These are system‑level patterns, not individual failings. Evidence shows that delays contribute to poorer outcomes, including preventable differences in mortality between women and men following a heart attack.

2. Evidence and policy

National recommendations from NICE, NHS England, Royal Colleges, the Healthcare Safety Investigation Branch and the British Heart Foundation describe expected approaches to diagnosing and managing acute coronary syndromes. These standards help to identify where systems diverge from guidance.

2.1 Diagnostic tests and investigations

Assessment typically begins with a structured history. Clinicians explore the nature of the discomfort, its onset and whether it changes with exertion or rest. Women often describe pressure, heaviness or upper‑abdominal discomfort, alongside nausea, breathlessness or fatigue. National sources highlight that clinicians may also ask about recent illness, stress or hormonal change, which can be relevant to conditions such as spontaneous coronary artery dissection (SCAD), a tear in a coronary artery wall.

Past medical history usually includes hypertension, high cholesterol, diabetes, autoimmune conditions, pregnancy‑related illnesses such as pre‑eclampsia, and known microvascular disease. These factors increase cardiovascular risk. Family history of early heart disease, menopausal status and psychosocial stressors are also relevant.

Physical examination commonly includes blood pressure in both arms, pulse, oxygen levels and observation for pallor or distress. Clinicians listen for murmurs or signs of heart failure and check for ankle swelling or lung crackles. Peripheral pulses are examined to identify any reduction in blood flow.

Guidance describes several symptoms that raise concern, such as chest pain radiating to the arm or jaw, sudden severe tearing pain that may suggest SCAD, fainting or near‑fainting, persistent vomiting, sudden unexplained breathlessness or new confusion in older women.

Testing usually begins with an electrocardiogram (ECG). It is central to recognising STEMI, but studies show that ECG changes can be subtler in women. National audits note that women often wait longer for the first ECG. When initial readings are normal but symptoms continue, repeat testing is expected.

Blood tests include high‑sensitivity troponin. NICE and NHS England support sex‑specific thresholds because women generally have lower baseline values. Reviews describe cases where fixed thresholds led to missed diagnoses. Full blood count, renal function, lipid profile and blood glucose tests are also commonly taken.

Echocardiography is used to assess heart function. Coronary angiography examines major heart arteries. In conditions such as MINOCA or SCAD, arteries may appear unobstructed even when an injury has occurred. Intravascular imaging such as intravascular ultrasound (IVUS) or optical coherence tomography (OCT) may identify plaque disruption or arterial tears not visible on standard tests. Cardiac magnetic resonance imaging (MRI) is increasingly used to differentiate between heart attack, inflammation, stress‑related cardiomyopathy and microvascular injury.

Monitoring typically includes continuous ECG observation, repeated blood pressure measurements and serial troponin testing. National investigations describe variation in access to repeat testing for women.

Where microvascular disease is suspected, specialist tests such as coronary flow reserve or the index of microcirculatory resistance may be used, although availability varies.

Women frequently report that symptoms were interpreted as anxiety or indigestion, that ECGs or troponin tests were delayed or that normal angiography results led to early discharge without discussion of conditions such as MINOCA, SCAD or microvascular disease. Pregnancy‑related cardiac risks, including those associated with the postnatal year, are also described as commonly overlooked.

System‑level issues identified in national investigations include inconsistent use of sex‑specific troponin thresholds, delayed angiography in women whose symptoms do not match classic patterns, misinterpretation of subtle ECG changes, and variation in access to advanced imaging. Microvascular disease may go unrecognised because specialist testing is unavailable. Symptoms during pregnancy or after birth may be interpreted as typical physiological changes.

NICE, the British Cardiovascular Society and European guidance set out expected assessment pathways and the use of high‑sensitivity troponin. UK bodies highlight the importance of sex‑specific thresholds. MBRRACE‑UK emphasises careful review of cardiac symptoms during pregnancy and the year after birth. Evidence gaps remain, including limited data for younger women, minority ethnic groups and those affected by SCAD or MINOCA.

Across evidence sources, acute coronary syndromes in women sit at the intersection of emergency care, diagnostics, imaging capability and cardiovascular policy. Delays often relate to symptom interpretation, threshold application or access to specialist investigations.

2.2 STEMI and NSTEMI

STEMI requires rapid ECG interpretation and timely treatment. National audits show delays in women reaching ECG assessment and receiving reperfusion. NSTEMI care relies on interpreting serial troponin changes and identifying evolving symptoms. Women may have smaller troponin rises, making sex‑specific thresholds particularly relevant.

2.3 MINOCA

MINOCA describes heart muscle injury without significant blockage in the main coronary arteries. Guidance emphasises investigating plaque disruption, coronary spasm, microvascular dysfunction or SCAD. Women form a substantial proportion of affected patients. Investigations describe uncertainty where normal angiography is not followed by further imaging.

2.4 SCAD

SCAD is a tear in the coronary artery wall. It is an established cause of heart attack in younger women and in the postnatal year. Standard angiography may not detect it. Access to intravascular imaging varies, contributing to inconsistency in diagnosis.

2.5 Microvascular infarction

Microvascular disease affects the smallest vessels supplying the heart. It is more common in women, particularly those with metabolic or autoimmune conditions. It may produce minimal ECG changes. Diagnosis often requires tests that are not available in all regions.

2.6 Troponin threshold disparities

Sex‑specific troponin thresholds are recommended in national guidance. Fixed thresholds have been associated with missed or delayed diagnoses in women, particularly those presenting early or with atypical symptoms.

2.7 Diagnostic delays in women

National audits and HSSIB reports highlight longer assessment times for women, delays in ECG and troponin testing, under‑recognition of atypical symptoms and lower use of evidence‑based therapies.

3. What investigations observe women raising

National reviews describe women frequently reporting that symptoms were attributed to stress, panic or indigestion. Many describe difficulty accessing early ECGs, long waits for results, limited explanations when tests appeared normal and discharge without consideration of diagnoses such as MINOCA or SCAD. These themes reflect system‑level issues rather than individual actions.

4. Pregnancy and the postnatal year

MBRRACE‑UK identifies SCAD, pregnancy‑associated coronary events and peripartum cardiomyopathy as important contributors to maternal morbidity. Symptoms may overlap with typical pregnancy experiences such as breathlessness or fatigue, making early recognition difficult. Investigations describe cases where cardiac symptoms were misattributed to pregnancy changes or anxiety.

System watchpoints

This section highlights system patterns seen in research, guidance and investigations. It is not medical or legal advice, and it is not a checklist for your own care.

Who the evidence represents

Many historical cardiac studies included fewer women, shaping diagnostic thresholds and digital algorithms.

Digital design

Automated ECG interpretation and troponin pathways may not reliably identify conditions such as MINOCA, SCAD or microvascular disease.

Triage and first contact

Telephone and online triage tools often prioritise classic chest pain descriptors, which may disadvantage women.

Transitions of care

Women with non‑obstructive disease may find rehabilitation or follow‑up pathways do not reflect their diagnosis. Access to specialist input varies.

Communication and uncertainty

Normal angiography can lead to premature reassurance. Women frequently report limited explanation of alternative causes.

What is improving

Improvements include greater adoption of sex‑specific troponin thresholds, expanded training on SCAD and MINOCA, GIRFT cardiology work addressing variation, increased use of cardiac MRI and national awareness campaigns focusing on women’s heart health.

Where further improvement might come from

Further progress may include better representation of women in cardiac research, clearer guidance on MINOCA and microvascular disease, improved triage tools, more consistent access to specialist pathways and training focused on diagnostic uncertainty. Readers are invited to share evidence‑based suggestions by email. Personal data should not be included.

Reflective questions

For clinicians

  1. How consistently are sex‑specific troponin thresholds used?
  2. Are atypical symptoms recognised within triage pathways?
  3. What systems support women with normal angiography but ongoing symptoms?
  4. How is SCAD considered in younger women or the postnatal year?
  5. How confidently is diagnostic uncertainty explained?

For patients and the public

  1. How visible are women’s heart attack symptoms in public information?
  2. What influences whether women seek help early?
  3. How understandable are explanations of ECGs and blood tests?
  4. Where might communication feel rushed during urgent care?
  5. What helps people feel heard when describing symptoms?

Mandatory disclaimer

This article is for general information and discussion only. It is not medical or legal advice, nor a substitute for professional advice. To contribute evidence, ideas, or corrections, please email womenshealthproject@outlook.com. Please do not share personal data when emailing. Individual cases cannot be reviewed. This project does not offer any form of legal service and cannot assist with complaints, claims or individual advocacy.

This platform is independent and not affiliated with any law firm, regulator, inquiry or clinical body.

© 2026 Women’s Health Inquiry Project (WHIP). This article includes original analysis of material from publicly available national sources. It may not be reproduced without permission.

References

  1. NICE. Acute Coronary Syndromes. Available at: https://www.nice.org.uk
  2. NHS England. Cardiology GIRFT Programme. Available at: https://www.england.nhs.uk
  3. Healthcare Safety Investigation Branch. Cardiac Diagnostics Reports. Available at: https://www.hssib.org.uk
  4. MBRRACE‑UK. Maternal Mortality Reports. Available at: https://www.npeu.ox.ac.uk/mbrrace-uk
  5. British Heart Foundation. Women’s Heart Health. Available at: https://www.bhf.org.uk