Post-arrest STEMI with a 45-minute road transfer and no on-site catheter laboratory
A 58-year-old man collapsed at a gym at 01:40. Bystanders started CPR within two minutes and an on-site AED delivered two shocks. Return of spontaneous circulation occurred at 18 minutes, and he arrives intubated but breathing over the tube, GCS 4, temperature 35.2 °C. Blood pressure is 78/45 mmHg on noradrenaline 0.30 microgram/kg/min, heart rate 118, SpO2 94% on FiO2 1.0. Arterial lactate 8.1 mmol/L, pH 7.18. The 12-lead ECG shows 2 mm ST elevation in V2–V4 with reciprocal change in the inferior leads. Bedside ultrasound shows a moderately impaired left ventricle, no right ventricular dilatation and no pericardial effusion. Your hospital has no catheter laboratory; the PCI centre is 45 minutes away by road. The retrieval helicopter is grounded by fog until dawn, and no family member can be reached.
1. Set out your first 30 minutes, stating the physiological targets you would use for oxygenation, ventilation, temperature and blood pressure, and justify each one.
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Airway and ventilation. Confirm tube position with capnography and lung sliding before anything else. Sedate and analgesic the patient (fentanyl plus propofol or midazolam) - shivering and pain raise oxygen consumption and worsen the acidosis. Titrate FiO2 to an SpO2 of 94–98%, weaning from 1.0 as soon as sats allow: hyperoxia after ROSC is associated with worse neurological outcome through reperfusion injury. Target PaCO2 35–45 mmHg. Hyperventilation causes cerebral vasoconstriction in an already globally ischaemic brain and reduces venous return; hypoventilation causes hypercapnia and pulmonary hypertension.
Circulation. Target MAP ≥65 mmHg (systolic ≥90). Put in an arterial line and use 250 mL crystalloid boluses with reassessment - the echo shows impaired LV function, so indiscriminate filling produces pulmonary oedema rather than pressure. Keep the noradrenaline and draw up dobutamine if the MAP is adequate but perfusion (lactate, mottling, urine output) is not. Take bloods for glucose, potassium, magnesium, troponin, and repeat the ECG.
Temperature. He is already at 35.2 °C. Provide active targeted temperature management at 32–36 °C for at least 24 hours, preventing both hyperthermia and shivering (magnesium, adequate sedation, surface counter-warming).
Other targets. Glucose below 10 mmol/L, potassium 4–5 mmol/L, treat any seizure, and continue cooling and monitoring throughout transfer. The reversible cause here is the coronary occlusion - every hour of delay costs myocardium, so these measures must be done in parallel with transfer logistics, not sequentially.
2. Choose between immediate transfer for primary PCI, pre-transfer fibrinolysis, and local stabilisation. Justify your decision and state two findings that would change it.
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Decision: transfer for primary PCI, while continuing resuscitation, with a physician escort.
Reasoning. The ST elevation with reciprocal change after a witnessed VF arrest is almost certainly a plaque rupture with occlusive thrombus; reperfusion is the only intervention that alters survival. PCI is superior to fibrinolysis whenever it can be delivered within roughly 120 minutes of first medical contact. A 45-minute road journey plus a pre-alerted, ready laboratory gives a realistic door-to-balloon time of 70–90 minutes, which is well inside that window and is also inside the 12-hour window for reperfusion. Fibrinolysis here would mean giving a full-dose lytic to a man who has had 18 minutes of chest compressions - likely rib fractures and a bruised, possibly contused myocardium - and who is already hypotensive and acidotic; the bleeding risk and the lower efficacy in a patient with cardiogenic shock make it the wrong first choice.
Practicalities that decide success. Do not wait for him to become "stable"; he will not. Pre-transfer checklist: arterial line, two vasoactive infusions ready, sedated and ventilated with an established minute volume, temperature management continued in the ambulance, blood gas on departure, PCI team and ambulance control pre-alerted, destination notified of the arrest and the airway.
Findings that would change the plan:
- Recurrent arrest or shock refractory to two agents, making the journey unsurvivable - then consider on-site fibrinolysis (recent CPR is a relative, not absolute, contraindication) or, if the fog lifts, urgent air retrieval.
- A change in the ECG - resolution of the ST elevation, a paced rhythm or a broad LBBB that makes the diagnosis uncertain - would call for reassessment rather than blind activation, since post-arrestRepolarisation abnormalities are common.
3. The family is contacted at six hours. What would you say about prognosis, what would you deliberately avoid, and why?
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What I would say. That he had a cardiac arrest, that his heart has been restarted and he is on a ventilator, that we are treating a blocked coronary artery, and that we are deliberately keeping him sedated and cool for at least 24 hours. I would name the team, give a scheduled time for the next update, and ask about his prior health, his wishes and any advance care planning. I would explain that the treatment is being given under emergency necessity and document that no surrogate could be reached.
What I would avoid.
- Numbers. Quoting survival or good-neurological-outcome percentages at six hours is misleading; the published figures apply to populations, not to this man, and he still has confounders in play.
- Early prognostication. Sedation, targeted temperature management, residual metabolic derangement and post-arrest seizures all depress the examination. Formal neuroprognostication should not be attempted before roughly 72 hours after return to normothermia and withdrawal of sedation, and should be multimodal (clinical examination, somatosensory evoked potentials, EEG, neuron-specific enolase, imaging).
- Asking the family to decide now. Premature "what would he have wanted" conversations, before we know whether he will wake, transfer an unbearable burden onto relatives and are not required.
- False certainty in either direction. "He is out of danger" and "there is no hope" are both unsupported at this point.
Reasoning. Communication in the first hours sets the tone for the whole admission. Families cope better with explicit uncertainty plus a clear plan and a named contact than with either vagueness or premature fatalism, and early, inaccurate pessimism can lead to withdrawal decisions that are later regretted.