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Why is dopamine contraindicated in ventricular fibrillation?

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The use of dopamine is contraindicated in patients with uncorrected tachyarrhythmias or ventricular fibrillation. Dopamine exerts an agonistic action on the beta receptors of the heart which may lead to an increase in heart rate, atrial fibrillation, enhanced A-V conduction, ventricular ectopy, and arrhythmias.
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