Use of vasopressors in cardiac arrest

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With regards to the use of vasopressors in cardiac arrest: Select one: a. they have been proven to improve outcomes b. vasopressin has been proven to be superior to adrenaline c. noradrenaline is superior to both vasopressin and adrenaline d. there is a dose related increase in coronary artery perfusion pressure up to bolus doses of 5 mg adrenaline in an adult. e. Depend upon mast cell stabilisation for their effectiveness 2-What reference supports your answer