Post-ROSC Care After Out-of-Hospital Cardiac Arrest in a Resource-Limited ED

Framework: oxygenation/ventilation, haemodynamics, neurological protection, disposition.

1. Avoid hyperoxia and hypocapnia. SpO2 99% on FiO2 1.0 is likely hyperoxic; titrate FiO2 to SpO2 94–98%. A ventilator rate of 10 with 500 mL may produce low PaCO2, which causes cerebral vasoconstriction. Target normocapnia (PaCO2 35–45 mmHg) guided by an early blood gas, and avoid routine hyperventilation.
2. Haemodynamics. Post-arrest hypotension worsens cerebral perfusion. Target MAP ≥65 mmHg (many protocols aim higher, ~80–90 mmHg) using fluids cautiously and vasopressors/inotropes. Consider reversible causes: 12-lead ECG for STEMI, bedside echo for tamponade or poor LV function, glucose and electrolytes.
3. Temperature control. He is already at 35.1°C. Prevent fever for at least 72 hours; if using active cooling, target 32–36°C and avoid shivering and overshoot. Ice packs plus a blanket are crude but acceptable where devices are unavailable; monitor core temperature continuously (oesophageal or bladder).
4. Seizure and glucose control. Treat clinical or EEG seizures; maintain normoglycaemia.
5. Disposition. With no cath lab, decide whether STEMI or refractory shock mandates urgent transfer to the PCI centre versus local ICU care. A patient with shock and possible cardiac cause is a candidate for transfer once stabilised, but transfer during active instability carries risk.

Justification: each measure targets secondary brain injury - hypoxia, hypercapnia/hypocapnia, hypotension, fever, seizures and hyperglycaemia are the modifiable determinants of outcome.

Counsel with uncertainty and without premature nihilism or false hope.

• Explain that the first 72 hours are the most informative period and that sedation, temperature control and residual drugs confound early examination. Confident prognostication at this stage is unreliable.
• Acknowledge the poor features: prolonged no-flow/low-flow time (ROSC at 14 minutes), shock requiring vasopressors, and out-of-hospital arrest. But note the reactive pupils and that he is only just post-arrest.
• Explain the plan: targeted temperature management, avoidance of secondary injury, and formal multimodal prognostication no earlier than 72 hours after return to normothermia, using clinical examination (pupillary and corneal reflexes, motor response), EEG, somatosensory evoked potentials, neuron-specific enolase and imaging.
• Do not use a single modality to predict poor outcome. State explicitly that you will not make a withdrawal decision on the basis of one examination.
• Offer practical support, allow the family to be present where feasible, and document the discussion.

Use a cause-directed, bedside-first approach.

1. Reassess the ABCs: confirm tube position and sedation, check ventilator pressures, and look for pneumothorax or dynamic hyperinflation.
2. Bedside ultrasound (RUSH-type): assess LV and RV function, pericardial effusion, IVC filling and lung sliding for pneumothorax. This distinguishes cardiogenic, obstructive and distributive components.
3. ECG and troponin: identify STEMI or ischaemia requiring reperfusion; consider transfer to the PCI centre if STEMI is present and the patient can be stabilised.
4. Reversible causes: check haemoglobin (bleeding from CPR or procedures), potassium, magnesium, glucose, acid-base status and temperature. Consider adrenal insufficiency in refractory shock.
5. Treatment: optimise preload, start or titrate vasopressors and inotropes according to the echo findings, correct electrolytes, and treat arrhythmias. Consider mechanical circulatory support only where available.
6. Document and communicate: record the working diagnosis and the rationale for transfer or continued local care.