Clinical features Investigations Therapy Prevention Prognosis

Investigations urea, electrolytes, creatinine calcium, magnesium d cardiac enzymes d thyroid function tests 12-lead ECG a  Consider further testing if the diagnosis is uncertain and your patient is stable event recorders a   or Holter monitoring b  worn for as long as possible c

Expiry date: July 2004
Levels of Evidence used in grading these guides