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A useful mnemonic derived from the conditions shown in fig 1 causing a non-VF/VT cardiac arrest is the four Hs and the four Ts.
There are many cardiac and respiratory causes of severe hypoxia, which require emergency treatment of the underlying condition. Oxygen treatment in an appropriate dose should be administered where possible. However, it is important to exclude a mechanical cause such as upper airways obstruction or tension pneumothorax.
The casualty should be inspected for evidence of haematemesis or melaena stool. Internal haemorrhage should always be suspected with evidence of penetrating wounds to the abdomen or chest.
Elevated plasma potassium levels occur with renal failure, diabetic ketoacidosis, potassium sparing diuretics, or excessive ingestion of potassium salts. In the context of a cardiac arrest, the patient should be given intravenously 10 ml 10% …