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A 2 week old baby presents with his parents with a sudden onset of lethargy, increased work of breathing and poor feeding.
On initial assessment the child is floppy with pale mottled skin and severe respiratory distress. He has a heart rate of 195 bpm, capillary refill time of 5 seconds and hepatomegaly with widespread crepitations throughout the lung fields. His oxygen saturations are unrecordable.
What are the differential diagnoses in this patient?
Arrange the following therapeutic interventions/investigations in order of importance for this patient.
Blood sugar level
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Supplemental oxygen
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Intravenous or intraosseus access
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Intravenous antibiotics
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Electrocardiogram
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Chest x-ray
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Echocardiogram
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What is the commonest cause of myocarditis in this age group?