Chest pain in a rural ED with no catheter lab
A 58-year-old man presents to a rural emergency department 90 minutes after the onset of central crushing chest pain radiating to the left arm, with sweating and nausea. He has a 20-pack-year smoking history and type 2 diabetes. Blood pressure is 148/92 mmHg, pulse 96/min and regular, SpO2 96% on room air, and he is afebrile. The ECG shows 2 mm ST elevation in leads II, III and aVF. Troponin is pending. The nearest percutaneous coronary intervention (PCI) centre is 150 minutes away by road; the local hospital has no catheter laboratory and no on-site cardiologist. Fibrinolysis is available, and there is no history of stroke, bleeding disorder or recent surgery. The patient is anxious and asks whether he can wait for the ambulance transfer to the bigger hospital.
1. Should this patient receive immediate fibrinolysis or be transferred for primary PCI? Justify your decision using the time intervals and the clinical findings.
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This is an inferior STEMI with symptom onset roughly 90 minutes ago, so he is well within the reperfusion window. The key decision is time to reperfusion. Primary PCI is generally preferred when it can be delivered within 120 minutes of first medical contact; here the journey alone is 150 minutes, and door-to-balloon would be longer still once transfer, handover and lab preparation are added. Fibrinolysis should therefore be given immediately, ideally within 30 minutes of arrival, provided there are no contraindications. He has none of the classic absolute contraindications: no prior intracranial haemorrhage, no recent ischaemic stroke, no active bleeding, no recent surgery, and no known bleeding diathesis. His age and hypertension are relative considerations only and do not outweigh the benefit of prompt reperfusion. The anxious desire to wait for transfer should be addressed directly: delaying fibrinolysis to travel for PCI in this time window worsens myocardial salvage and outcomes. After lysis, he should still be transferred to the PCI centre for coronary angiography, typically within 2 to 24 hours, regardless of whether pain resolves, because rescue or routine early angiography is indicated. Watch for reperfusion arrhythmias and inferior MI complications such as bradyarrhythmias and right ventricular involvement; obtain right-sided leads and avoid nitrates if right ventricular infarction is suspected.
2. Two hours after fibrinolysis, the patient's pain persists and the ST elevation has not resolved. What is the next step and why?
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Persistent pain with less than 50% resolution of ST elevation at 60 to 90 minutes after lysis indicates failed reperfusion. This is a class I indication for urgent rescue PCI rather than a second dose of fibrinolytic, which adds bleeding risk without proven benefit. Arrange immediate transfer to the catheter laboratory, continue dual antiplatelet therapy and anticoagulation per protocol, and monitor for arrhythmia and haemodynamic instability en route. If transfer is delayed, stabilise with anti-ischaemic therapy and consider inotropic or mechanical support if cardiogenic shock develops. Document the failed reperfusion criteria clearly so the receiving team understands the urgency.