What are the life-threatening causes of chest pain a GP must not miss?

Six time-critical diagnoses carry the highest mortality if missed: acute coronary syndrome (STEMI, NSTEMI, unstable angina); aortic dissection (Stanford A and B); pulmonary embolism; tension pneumothorax; cardiac tamponade (Beck's triad — hypotension, muffled heart sounds, raised jugular venous pressure); and oesophageal rupture (Boerhaave — after forceful vomiting). Features that prompt immediate 000 call and transfer include: crushing or pressure central chest pain lasting more than 20 minutes unrelieved by GTN; pain with diaphoresis, breathlessness, syncope, or vomiting; tearing or ripping pain radiating between the shoulder blades with an arm blood pressure differential greater than 20 mmHg; sudden pleuritic pain with breathlessness and hypoxia; or haemodynamic instability.

What is the HEART score and how is it used?

The HEART score is a validated risk stratification tool used in emergency departments and GP settings to guide chest pain workup. It assigns points across five domains: History (suspicious vs non-specific vs highly suspicious for ACS); ECG (normal vs non-specific vs significant ST changes); Age ( 3× upper limit). A total score of 0–3 identifies a low-risk group with approximately 2% six-week major adverse cardiac event rate; 4–6 is moderate risk (12–17%); 7–10 is high risk (50–65%). The NHFA/CSANZ Australian ACS guideline endorses the HEART score as the standard tool for general practice and emergency triage.

What does high-sensitivity troponin testing mean and how is it interpreted?

High-sensitivity troponin T or I (hsTnT/hsTnI) assays detect myocardial injury at much lower concentrations than conventional troponin. Australian tertiary emergency departments use rapid rule-out algorithms: the 0/1-hour protocol (draw troponin at presentation and 1 hour later) or 0/3-hour protocol. A troponin below the sex-specific 99th percentile at presentation, combined with a rise of less than 50% at 1 or 3 hours, effectively excludes acute MI with a negative predictive value exceeding 99%. A troponin above the 99th percentile, or a dynamic rise of 50% or more, is positive for acute myocardial injury and requires urgent cardiology input. In GPs ordering troponin from the community, standard assays with 3 or 6-hour intervals are used — always clarify the assay type and whether serial testing is feasible.

What causes non-cardiac chest pain and how is it approached?

After cardiac causes are excluded, the most common causes of non-cardiac chest pain are gastro-oesophageal reflux disease (GORD) — accounting for 30–40% of non-cardiac chest pain in most series — followed by musculoskeletal (costochondritis, Tietze's syndrome, intercostal strain) at 13–28%, and psychological causes (panic disorder, anxiety, somatic pain) at 7–17%. Reframing approaches: GORD-pattern chest pain (burning, worse after meals, antacid relief) warrants a 2–4 week trial of double-dose proton pump inhibitor, which is both diagnostic and therapeutic per Cochrane evidence. Musculoskeletal pain (reproducible by palpation, positional) responds to topical diclofenac or short-course oral NSAIDs with reassurance. Panic-pattern presentations (sudden onset, palpitations, hyperventilation, fear of dying) should be addressed with a Mental Health Treatment Plan and CBT referral.

What is the safety-net script to give after a low-risk chest pain discharge?

Documenting and verbally delivering a clear safety-net instruction is both clinically essential and medico-legally protective. A standard AU-practice safety-net for chest pain discharge reads: 'If your chest pain returns, gets worse, lasts more than 10 minutes, or is associated with sweating, breathlessness, pain radiating to your arm, jaw, or back, or you feel faint — call 000 immediately. Do not drive yourself. Take your GTN if you have it. Otherwise see your GP within one week.' This instruction should be documented in the medical record, including that the patient confirmed they understood it.

Undifferentiated chest pain

Chest pain workup in general practice: ruling out the killers

By Dr HB Lo, FACRRM Reviewed 22 June 2026 9 min read

Chest pain accounts for roughly 5% of Australian general practice presentations. The approach is a rule-out cascade — six life-threatening conditions must be excluded before reframing to common causes such as GORD, musculoskeletal pain, or anxiety.

The HEART score (0–10) guides triage. A score of 0–3 with negative serial high-sensitivity troponin carries a less than 2% six-week MACE risk — suitable for GP follow-up. Scores of 4–6 require observation; 7–10 an invasive pathway.

A 12-lead ECG must be performed within 10 minutes of any suspected cardiac presentation. STEMI is a 000 emergency requiring immediate transfer to a PCI-capable centre.

Why chest pain workup is fundamentally a rule-out exercise

Chest pain represents approximately 5% of Australian general practice consultations and around 25% of emergency department presentations. Approximately 10–15% of undifferentiated chest pain reaching an ED proves to be an acute coronary syndrome (ACS). The remainder — the majority — are benign conditions including GORD, musculoskeletal pain, anxiety, and panic disorder.

The diagnostic challenge is that clinical features alone cannot reliably distinguish life-threatening from benign causes. Atypical presentations are common — particularly in women, older adults, people with diabetes, and Aboriginal and Torres Strait Islander Australians, who present with ACS earlier in life and with more non-classic features. The consequence of a missed AMI is approximately 12% 30-day mortality. This reality drives the bias toward over-investigation, and it is the right bias.

The National Heart Foundation of Australia / CSANZ Australian ACS Guideline 2025 is the primary AU reference. eTG Cardiovascular and RACGP resources provide general practice-specific operational guidance.

A. Core clinical — the AU general-practice framework

The six time-critical diagnoses

Every undifferentiated chest pain presentation demands active consideration of six immediately life-threatening conditions before reframing to common benign causes:

Acute coronary syndrome — STEMI, NSTEMI, unstable angina
Aortic dissection — Stanford A (ascending) and B (descending)
Pulmonary embolism
Tension pneumothorax
Cardiac tamponade — Beck’s triad: hypotension, muffled heart sounds, elevated JVP
Oesophageal rupture (Boerhaave) — Mackler triad: forceful vomiting, chest pain, subcutaneous emphysema

Immediate 000 call and transfer is indicated for:

Crushing/pressure/heaviness central chest pain >20 minutes unrelieved by GTN
Chest pain with diaphoresis, breathlessness, syncope, or vomiting
Tearing/ripping radiation to the interscapular area + blood pressure differential between arms >20 mmHg (aortic dissection)
Sudden pleuritic pain + tachycardia + hypoxia + hypotension (pulmonary embolism)
Hyper-resonant unilateral chest + haemodynamic instability (tension pneumothorax)
Any haemodynamic instability — shock, syncope, diaphoresis

History — SOCRATES plus risk factors

Structured history accelerates the differential:

Site — central retrosternal (cardiac/GI), lateralised (pulmonary/MSK), epigastric (GI/cardiac overlap)
Onset — sudden (dissection, PE, pneumothorax, Boerhaave) vs gradual (ACS, pneumonia, pericarditis)
Character — pressure/crushing/heaviness (cardiac); tearing/ripping (dissection); sharp, worse with breath (PE, pneumothorax, pleuritis, MSK, pericarditis); burning (GORD); reproducible by palpation (MSK)
Radiation — left arm or jaw (cardiac); interscapular (dissection); back (PE, dissection, pancreatitis); dermatomal (herpes zoster — may precede vesicles)
Associations — diaphoresis and nausea (cardiac); haemoptysis (PE, pneumonia); fever (pneumonia, pericarditis); reflux taste (GORD)
Timing — exertional + rest relief (stable angina); rest-onset >20 min (ACS); post-prandial (GORD); positional better leaning forward (pericarditis)
Relieving — GTN relief (cardiac or oesophageal spasm — both); antacid (GORD); reduced with movement avoidance (MSK)

Cardiovascular risk factors: age >50 (male) / >55 (female), smoking, type 2 diabetes, hypertension, dyslipidaemia, family history of premature CVD, prior events, chronic kidney disease, obesity.

VTE risk factors: prior VTE, active malignancy, recent surgery or prolonged immobility, long-haul travel, oral contraceptive pill or HRT, pregnancy or postpartum, thrombophilia.

Atypical presentations — women, older adults, people with diabetes, and ATSI patients more commonly present with breathlessness, fatigue, epigastric pain, jaw pain, or back pain rather than classical chest pain. Lower threshold for ECG and troponin in these groups.

Examination

Vital signs — heart rate, blood pressure in both arms (>20 mmHg differential raises concern for dissection), respiratory rate, SpO₂, temperature
Cardiovascular — heart sounds (muffled = tamponade), new murmurs (aortic regurgitation in type A dissection; HOCM; mitral regurgitation post-MI), JVP, pericardial rub, femoral and peripheral pulses, pedal oedema
Respiratory — tracheal deviation (tension pneumothorax), percussion (hyper-resonant = pneumothorax; dull = consolidation/effusion), breath sounds (absent = pneumothorax; crackles = HF/pneumonia)
Abdominal — epigastric tenderness, Murphy’s sign, aortic pulsation
MSK — reproducibility of pain by palpation of costochondral junctions (costochondritis) or sternocostal cartilages with swelling (Tietze’s syndrome)
Lower limbs — unilateral calf swelling or tenderness (DVT → PE)

Investigations — first-line GP and ED bundle

12-lead ECG within 10 minutes of any suspected cardiac chest pain (NHFA/CSANZ 2025) — MBS item 11700:

STEMI = ST elevation ≥1 mm in ≥2 contiguous leads, new LBBB, or posterior STEMI (V7–V9) → immediate 000 / Cat-1 PCI transfer
NSTEMI/unstable angina = ST depression, T-wave inversion, transient elevation → ACS until proven otherwise
Pericarditis = widespread concave-up ST elevation with PR depression
PE = sinus tachycardia most common; S1Q3T3 pattern specific but uncommon

High-sensitivity troponin using the 0/1-hour or 0/3-hour rapid rule-out algorithm (RAPID-TnT, Chew Circulation 2019). Dynamic rise >50% from baseline confirms ACS. MBS item 66536 covers cardiac panel including troponin.

Blood panel — FBC, UEC, LFTs, lipids, HbA1c, TSH (MBS 65070 / 73529). BNP or NT-proBNP if heart failure features. D-dimer if Wells PE score is positive — use age-adjusted threshold (age × 10 ng/mL for patients over 50 years — Righini JAMA 2014); negative D-dimer with low pre-test probability excludes PE without imaging.

Chest X-ray (MBS 58503) — pneumothorax, widened mediastinum (dissection — only 60% sensitive), consolidation, pulmonary oedema, pleural effusion.

CT angiography as indicated:

CTPA (MBS 57353) — pulmonary embolism
CT aortogram (MBS 56507 / 56807) — aortic dissection
CT coronary angiogram (CTCA) (MBS 57352) — first-line for low–intermediate-risk stable chest pain in patients under 65; SCOT-HEART NEJM 2018 demonstrated 41% reduction in non-fatal MI at 5 years compared with standard care

B. HEART score risk stratification

The HEART score integrates five domains — History, ECG, Age, Risk factors, Troponin — into a 0–10 triage band, validated in Australian and international populations (Mahler Circulation 2018):

HEART score	Risk band	6-week MACE	GP pathway
0–3	Low	≤2%	Discharge with safety-net; GP follow-up within 1 week
4–6	Moderate	12–17%	Observation unit; serial hsTnT; cardiology
7–10	High	50–65%	Invasive — coronary angiography

TIMI and GRACE supplement in tertiary settings. NHFA/CSANZ 2025 endorses HEART as the standard general practice and emergency triage tool.

Important limitations: HEART score performs less well in women, older adults, and patients with diabetes, where atypical presentations are common. A low HEART score should not override strong clinical concern — when in doubt, transfer.

C. The non-cardiac chest pain majority — pragmatic reframing

After cardiac causes are systematically excluded, clinical reframing to the most likely benign cause drives further management:

GORD pattern (burning, post-prandial, antacid relief, worse supine): Cochrane Wang 2014 — a 2–4 week trial of double-dose proton pump inhibitor (e.g., esomeprazole 40 mg or omeprazole 40 mg daily) is both diagnostic and therapeutic. Sensitivity approximately 80%, specificity 74% for oesophageal cause. De-escalate to standard dose at 4 weeks if responsive; upper GI endoscopy if alarm features (dysphagia, weight loss, haematemesis, anaemia).

MSK pattern (reproducible by palpation, positional, dermatomal): Costochondritis and Tietze’s syndrome — topical diclofenac gel or short-course oral NSAID for 7–14 days; reassurance and activity modification. If dermatomal vesicles develop, consider herpes zoster — antivirals within 72 hours of rash onset.

Panic disorder / anxiety pattern (sudden, palpitations, hyperventilation, depersonalisation, fear of dying): This accounts for 7–17% of non-cardiac chest pain. Cochrane Kisely 2017 supports CBT as effective. Mental Health Treatment Plan with psychology referral (MBS items 2715 / 2717); SSRI if recurrent panic disorder.

Pericarditis pattern (sharp, better leaning forward, worse supine, worse with inspiration, widespread concave-up ST elevation on ECG): Refer to cardiology for cardiac MRI (Lake Louise criteria for myocarditis); NSAIDs and colchicine per eTG.

D. Australian operations

MBS items for chest pain workup:

Consultations: items 23 / 36 / 44 (Level B/C/D); Level D appropriate for comprehensive chest pain review ≥40 minutes
Heart Health Check: item 699 for adults aged 45+ (30+ for ATSI)
ATSI health assessment: item 715
ECG: item 11700 (trace and report, same practitioner); 11707 (separate provider)
Pathology: FBC / UEC / LFTs / lipids (item 65070); troponin / cardiac chemistry (item 66536); HbA1c (item 66551); TFTs / iron (item 73529)
Imaging: CXR (item 58503); CTPA (item 57353); CT aortogram (items 56507 / 56807); CTCA (item 57352); echocardiogram (items 55113 / 55114); exercise stress test (item 11712); stress echo (item 55117); myocardial perfusion scan (item 61306); cardiac MRI (item 63395)
Mental health care plan: items 2715 / 2717 for panic or anxiety pathway

PBS medicines relevant to chest pain management:

Aspirin 300 mg loading then 100 mg daily — general schedule; anti-platelet standard post-ACS
GTN sublingual or spray — general schedule; kept in clinic and prescribed for patients with known or suspected angina
Beta-blockers (metoprolol, bisoprolol, atenolol) — general schedule
Statins (rosuvastatin, atorvastatin) — general schedule for secondary CV prevention
Omeprazole / esomeprazole / pantoprazole — general schedule for empirical PPI trial
SSRI (sertraline, escitalopram) — general schedule for panic/anxiety pathway

Telehealth limitations: Chest pain with possible red flags is not appropriate for first-contact telehealth assessment. Telehealth is appropriate for follow-up of confirmed low-risk presentations, medication review, and post-discharge surveillance only. If a patient calls with active chest pain, default to directing them to 000 and a face-to-face review.

Documentation and medico-legal: Document the time-stamped ECG; document the HEART score and each component; document the safety-net script with patient confirmation of understanding; document diagnostic uncertainty explicitly. Failure to document serial troponin (when indicated) is a common medico-legal trap in chest pain presentations.

E. Special populations

Women. More likely to present with atypical symptoms — breathlessness, fatigue, jaw pain, nausea, back pain. Comparable ACS event rates to men at older age, but under-triaged and under-investigated in some settings. Lower threshold for ECG and troponin in any middle-aged or older woman with chest discomfort.

Older adults. ACS presentations are more frequently atypical; pain may be absent entirely; diaphoresis and breathlessness may dominate. Multiple comorbidities complicate ECG interpretation (baseline LBBB, LVH). Senior clinical review of any unusual presentation in patients over 75 is appropriate.

Aboriginal and Torres Strait Islander Australians. CHD events occur 10–20 years earlier than in non-Indigenous Australians. A lower threshold for ECG and troponin testing in ATSI patients is endorsed by NHFA/CSANZ 2025. The 715 health assessment (item 715) provides an opportunity to assess cardiovascular risk early.

Diabetes. Autonomic neuropathy blunts pain perception — “silent MI” is well-recognised. Any unexplained deterioration in glycaemic control, fatigue, or dyspnoea in a patient with diabetes warrants an ECG and troponin.

When to escalate

Any suspected ACS, aortic dissection, PE, tamponade, pneumothorax, or Boerhaave → 000 / immediate ED transfer
HEART score 4–6 with suspicious history or dynamic troponin → ED / cardiology same day
New-onset stable angina after low-risk workup → cardiology within 2 weeks ± CTCA
Recurrent unexplained chest pain after cardiac rule-out → upper GI endoscopy (if GORD-pattern), or psychology referral via MHCP (if anxiety-pattern), or cardiology (if effort-related or functional cardiac concern)
Suspected pericarditis or myocarditis → cardiology + cardiac MRI
Suspected PE in pregnancy → immediate ED / obstetric team

What this article is and is not

This is general health information drawn from current Australian guidelines — NHFA/CSANZ ACS 2025, eTG Cardiovascular, RACGP, and CSANZ position statements. It is not personal medical advice and does not create a doctor–patient relationship. Individual chest pain presentations require clinical assessment by a qualified medical practitioner. When in doubt about chest pain — call 000.

For consumer resources: HealthDirect — Chest pain, Better Health Channel, Heart Foundation — warning signs of heart attack.

Sources cited

Frequently asked questions

What are the life-threatening causes of chest pain a GP must not miss?

Six time-critical diagnoses carry the highest mortality if missed: acute coronary syndrome (STEMI, NSTEMI, unstable angina); aortic dissection (Stanford A and B); pulmonary embolism; tension pneumothorax; cardiac tamponade (Beck's triad — hypotension, muffled heart sounds, raised jugular venous pressure); and oesophageal rupture (Boerhaave — after forceful vomiting). Features that prompt immediate 000 call and transfer include: crushing or pressure central chest pain lasting more than 20 minutes unrelieved by GTN; pain with diaphoresis, breathlessness, syncope, or vomiting; tearing or ripping pain radiating between the shoulder blades with an arm blood pressure differential greater than 20 mmHg; sudden pleuritic pain with breathlessness and hypoxia; or haemodynamic instability.
What is the HEART score and how is it used?

The HEART score is a validated risk stratification tool used in emergency departments and GP settings to guide chest pain workup. It assigns points across five domains: History (suspicious vs non-specific vs highly suspicious for ACS); ECG (normal vs non-specific vs significant ST changes); Age (<45, 45–64, ≥65); Risk factors (none vs 1–2 known vs 3 or more, or prior atherosclerotic disease); and Troponin (normal, 1–3× upper limit of normal, >3× upper limit). A total score of 0–3 identifies a low-risk group with approximately 2% six-week major adverse cardiac event rate; 4–6 is moderate risk (12–17%); 7–10 is high risk (50–65%). The NHFA/CSANZ Australian ACS guideline endorses the HEART score as the standard tool for general practice and emergency triage.
What does high-sensitivity troponin testing mean and how is it interpreted?

High-sensitivity troponin T or I (hsTnT/hsTnI) assays detect myocardial injury at much lower concentrations than conventional troponin. Australian tertiary emergency departments use rapid rule-out algorithms: the 0/1-hour protocol (draw troponin at presentation and 1 hour later) or 0/3-hour protocol. A troponin below the sex-specific 99th percentile at presentation, combined with a rise of less than 50% at 1 or 3 hours, effectively excludes acute MI with a negative predictive value exceeding 99%. A troponin above the 99th percentile, or a dynamic rise of 50% or more, is positive for acute myocardial injury and requires urgent cardiology input. In GPs ordering troponin from the community, standard assays with 3 or 6-hour intervals are used — always clarify the assay type and whether serial testing is feasible.
What causes non-cardiac chest pain and how is it approached?

After cardiac causes are excluded, the most common causes of non-cardiac chest pain are gastro-oesophageal reflux disease (GORD) — accounting for 30–40% of non-cardiac chest pain in most series — followed by musculoskeletal (costochondritis, Tietze's syndrome, intercostal strain) at 13–28%, and psychological causes (panic disorder, anxiety, somatic pain) at 7–17%. Reframing approaches: GORD-pattern chest pain (burning, worse after meals, antacid relief) warrants a 2–4 week trial of double-dose proton pump inhibitor, which is both diagnostic and therapeutic per Cochrane evidence. Musculoskeletal pain (reproducible by palpation, positional) responds to topical diclofenac or short-course oral NSAIDs with reassurance. Panic-pattern presentations (sudden onset, palpitations, hyperventilation, fear of dying) should be addressed with a Mental Health Treatment Plan and CBT referral.
What is the safety-net script to give after a low-risk chest pain discharge?

Documenting and verbally delivering a clear safety-net instruction is both clinically essential and medico-legally protective. A standard AU-practice safety-net for chest pain discharge reads: 'If your chest pain returns, gets worse, lasts more than 10 minutes, or is associated with sweating, breathlessness, pain radiating to your arm, jaw, or back, or you feel faint — call 000 immediately. Do not drive yourself. Take your GTN if you have it. Otherwise see your GP within one week.' This instruction should be documented in the medical record, including that the patient confirmed they understood it.

Source quality

Sources grouped by evidence tier. AU primary tier first; international where AU is silent or lagging; named-author reconstruction where guidelines have not yet caught up. How tiers work.