Management of Ventricular Bigeminy After Noradrenaline Withdrawal

Immediate Assessment and Treatment

The American Heart Association recommends checking serum potassium and magnesium immediately and correcting any deficiencies, as hypokalemia is a well-established trigger for ventricular arrhythmias and can be exacerbated by catecholamine exposure 2, 1
The American College of Cardiology suggests assessing hemodynamic stability by checking blood pressure, signs of hypoperfusion, and presence of symptoms, with a strength of evidence level of B 1, 3
Obtaining a 12-lead ECG is recommended to evaluate for evidence of myocardial ischemia, structural heart disease, or QT prolongation, with a high level of evidence 1

For hemodynamically unstable patients, the American Heart Association recommends proceeding immediately to synchronized DC cardioversion starting at 100J, then 200J, then 360J if the bigeminy degenerates into sustained ventricular tachycardia with hemodynamic compromise, with a strength of evidence level of A 3, 4
The European Society of Cardiology suggests considering amiodarone 150 mg IV over 10 minutes for refractory ventricular arrhythmias in the hemodynamically unstable patient, with a moderate level of evidence 3
For hemodynamically stable patients, the American College of Cardiology recommends initiating or optimizing beta-blocker therapy as first-line treatment, particularly given the context of recent noradrenaline withdrawal and likely heightened residual adrenergic tone, with a high level of evidence 1, 2

Lidocaine 50 mg IV over 2 minutes can be administered, repeated every 5 minutes to a total dose of 200 mg, followed by maintenance infusion at 2 mg/min if effective, with a moderate level of evidence 3
Amiodarone may be considered for patients with structural heart disease and symptomatic ventricular bigeminy that persists despite beta-blockers, given as 150 mg IV bolus, with a moderate level of evidence 1, 3

Continuous cardiac monitoring should be maintained until the bigeminy resolves or stabilizes, with a high level of evidence 4
Serial ECGs and cardiac biomarkers should be obtained if myocardial ischemia is suspected, with a moderate level of evidence 1
Echocardiography should be performed to assess for structural heart disease if not previously done, with a high level of evidence 1