- acute respiratory distress syndrome (ards) - contraindications for or known hypersensitivity to amiodarone or calcium channel blockers - long qt syndrome - prolonged baseline qtc interval (≥450 ms). - cardiogenic shock or severe hypotension (sbp< 90 mmhg) - severe left ventricle dysfunction (left ventricular ejection fraction ≤35%) - severe sinus - node dysfunction with marked sinus bradycardia - 2nd/3rd degree heart block - bradycardia without pacemaker that has caused syncope - history of severe dysthyroidism - a-fib/flutter conducted via accessory pathway (ie,wolff -parkinson-white)

- acute respiratory distress syndrome (ards) - contraindications for or known hypersensitivity to amiodarone or calcium channel blockers - long qt syndrome - prolonged baseline qtc interval (≥450 ms). - cardiogenic shock or severe hypotension (sbp< 90 mmhg) - severe left ventricle dysfunction (left ventricular ejection fraction ≤35%) - severe sinus - node dysfunction with marked sinus bradycardia - 2nd/3rd degree heart block - bradycardia without pacemaker that has caused syncope - history of severe dysthyroidism - a-fib/flutter conducted via accessory pathway (ie,wolff -parkinson-white)