Anterior STEMI with a recent stroke and a three-hour transfer time
A 58-year-old man with type 2 diabetes and a 30-pack-year smoking history presents to a district hospital 90 minutes after the onset of central crushing chest pain. The ECG shows 4 mm of ST elevation in leads V2–V5, with reciprocal depression in II, III and aVF. Blood pressure is 150/95 mmHg, pulse 96/min, oxygen saturation 96% on air, and there are bibasal crepitations. Six weeks ago he had a small ischaemic stroke and still has mild weakness of the right hand. The nearest catheterisation laboratory is 3 hours away by road, and an ambulance is available now. There is no cardiologist on site, and troponin testing is not available.
1. Which reperfusion strategy will you choose, and why?
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He has an acute anterior ST-elevation myocardial infarction with a large territory at risk and symptoms of under 12 hours, so reperfusion is indicated. The decision rests on weighing the bleeding risk of fibrinolysis against the delay to primary percutaneous coronary intervention.
The ischaemic stroke six weeks ago is the decisive factor. Recent ischaemic stroke - particularly within 3 months - is conventionally regarded as an absolute contraindication to fibrinolysis, and at six weeks the intracranial haemorrhage risk is still unacceptable when a mechanical alternative exists. Fibrinolysis is therefore not a defensible option here, even though the 3-hour road transfer means the door-to-balloon time will clearly exceed the 120-minute threshold that normally favours thrombolysis.
That threshold applies when fibrinolysis is a safe alternative. When it is contraindicated, primary PCI remains the preferred strategy for symptom onset within 12 hours, accepting the longer transfer time. Arrange immediate transfer to the catheterisation laboratory, activate the PCI team by telephone before departure, and do not let the journey time become a reason to give a contraindicated drug. If the patient were to develop cardiogenic shock, the case for urgent transfer and mechanical support becomes even stronger.
2. What will you give and do before and during transfer?
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Give aspirin 300 mg chewed immediately. Add a P2Y12 inhibitor - clopidogrel 600 mg as a loading dose is the pragmatic choice when the bleeding risk is high and a potent agent such as ticagrelor may be relatively contraindicated by his recent stroke; document the reasoning. Give a statin, and treat pain and anxiety with cautious intravenous opioid if needed.
Anticoagulation for the transfer should be discussed with the receiving cardiologist: unfractionated heparin is often preferred over low-molecular-weight heparin in this setting because it can be stopped and reversed quickly if bleeding occurs. Do not give a fibrinolytic, and do not give non-steroidal anti-inflammatory drugs.
The bibasal crepitations suggest early pulmonary congestion, so give oxygen only if saturation falls below about 90–94%, sit him upright, and avoid large fluid boluses. Attach continuous monitoring and send a defibrillator with the ambulance, because ventricular fibrillation is most likely in the first hours. Send a trained escort with resuscitation drugs, obtain intravenous access, record a further ECG and transmit it, and give the receiving team a clear handover including the stroke date, the drugs and times given, and the estimated arrival time. Aspirin, a P2Y12 inhibitor and anticoagulation should not be delayed simply because the patient is being transferred.
3. The ambulance is cancelled because of flooding and no alternative transport exists. How does your plan change?
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With no mechanical reperfusion available within a plausible timeframe, the risk calculus shifts: an untreated proximal left anterior descending occlusion carries a very high mortality, and that may outweigh the increased intracranial haemorrhage risk from fibrinolysis. This is a genuinely difficult judgement and should be shared explicitly with the patient and, where possible, a senior physician or cardiologist by telephone.
Re-examine the contraindication and the alternatives. If the stroke was small and he has recovered except for mild hand weakness, and there is no other bleeding risk, fibrinolysis using a weight-adjusted regimen may be reasonable as a last resort after consent, with the intracranial haemorrhage risk explained. If there is any possibility of transfer within 12 hours by another route, or of a local team arriving, that remains preferable. Do not give a fibrinolytic simply because it is the only thing available without weighing the stroke history.
If fibrinolysis is given, monitor for reperfusion arrhythmias, bleeding and neurological change, and have a plan for urgent transfer if any deterioration occurs. If it is not given, treat medically with aspirin, a P2Y12 inhibitor, anticoagulation, a beta-blocker when safe, nitrates if tolerated, and close monitoring in the highest-dependency area available. Either way, document the discussion and the reasoning contemporaneously.