Chest Pain in a 58-Year-Old Woman with Atypical Features
A 58-year-old woman presents to a district hospital at 09:00 with 2 hours of central chest tightness that began while she was resting. She describes it as 'pressure' radiating to the left jaw, associated with nausea and sweating. She has type 2 diabetes and hypertension, and takes metformin, ramipril and atorvastatin. She is a non-smoker. On examination: BP 148/88 mmHg, HR 92 regular, SpO2 97% on air, temperature 36.9 °C, chest clear, no calf tenderness. The 12-lead ECG shows 1 mm ST depression in leads V4–V6 and T-wave inversion in III and aVF; there is no ST elevation. High-sensitivity troponin is not available on site and will take 90 minutes to return from the regional laboratory. The nearest catheterization laboratory is 2.5 hours away by road; there is no helicopter available today.
1. How do you risk-stratify and manage this patient in the first hour, given the resource constraints?
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This is a high-risk non-ST-elevation acute coronary syndrome until proven otherwise.
Risk features present: ongoing rest pain, diabetes, hypertension, female sex, dynamic ST depression and T-wave inversion, nausea/sweating. Using a validated tool (GRACE or TIMI) she is not low risk. The absence of ST elevation does not mean 'not a heart attack'.
First hour:
- Aspirin 300 mg chewed (unless contraindicated) and a P2Y12 inhibitor per local protocol; anticoagulation (e.g., fondaparinux or enoxaparin) once the diagnosis is supported. Sublingual nitrate for pain if BP allows; beta-blocker if no contraindication.
- Continuous monitoring, IV access, oxygen only if hypoxic (she is 97% - routine oxygen is not indicated and may be harmful).
- Serial ECGs every 15–30 minutes - the priority is to detect evolution to ST elevation, which changes everything.
- Send high-sensitivity troponin now and repeat at the appropriate interval; a single early value is not enough. Also send FBC, U&E, glucose, lipids, coagulation, and a chest X-ray.
- Do not give thrombolysis - there is no ST elevation, and thrombolysis in NSTE-ACS is harmful.
The resource judgement: with a 2.5-hour transfer time, she falls outside the 120-minute window for primary PCI for STEMI - but she does not have STEMI. For NSTE-ACS, an early invasive strategy within 24 hours is appropriate for high-risk patients; arrange urgent transfer to the PCI centre after stabilization and discussion with the receiving cardiologist, rather than keeping her locally for serial troponins over many hours. If she deteriorates (haemodynamic instability, refractory pain, arrhythmia), transfer becomes emergency.
2. At 11:00 she develops severe pain and the repeat ECG shows 2 mm ST elevation in II, III and aVF. What is your immediate plan, and how do the geography and time matter?
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This is now an inferior STEMI - reperfusion is time-critical.
- Immediate: activate the STEMI pathway, give aspirin (if not already), P2Y12 inhibitor, anticoagulation, and analgesia. Do not give nitrates if there is any suggestion of right ventricular involvement (hypotension, raised JVP, clear lungs) - inferior infarcts often involve the right ventricle, and nitrates can cause profound hypotension. Obtain right-sided leads.
- Reperfusion decision: primary PCI is preferred if it can be delivered within 120 minutes of first medical contact. The lab is 2.5 hours away by road - that exceeds the window. Therefore fibrinolysis should be given now, provided there are no contraindications, with immediate transfer to the PCI centre for rescue or routine angiography.
- Check contraindications before lysis: recent surgery, stroke, bleeding, severe hypertension, aortic dissection. Her BP is 148/88, which is acceptable.
- If fibrinolysis is contraindicated or fails (persistent pain, persistent ST elevation at 60–90 min, or arrhythmia), arrange emergency transfer for rescue PCI.
- Monitor for reperfusion arrhythmias and have defibrillator and atropine ready - inferior infarcts commonly cause bradyarrhythmias and heart block.
The judgement point: the correct answer changes completely when the ECG evolves. The candidate who says 'transfer for PCI' without considering the 2.5-hour delay, or who gives nitrates to an inferior infarct, fails the station. Geography is a clinical variable.