first aid cpr chest pain acls als cpr bls ecg er ed st depression ua stemi acute coronary syndrome non invasive ventilation emergency ventilator dengue in paediatric non invasive monitoring dengue dengue emergency department chest compression rescue breath trauma 1st degree burn burn 2nd degree burn shock fracture frls btls snake bite high risk nstemi stemi equivalent advanced life support bradyarrythmia pulseless arrest tachyarrythmia
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