Awoman reports a racing heart that began while she was playing softball 2 hours ago. her ecg shows a rapid and regular heart rate, and she is given an intravenous bolus of a drug that activates g protein–coupled receptors. which drug mechanism may lead to termination of the arrhythmia?

increase reflux of potassium

Explanation:

The woman possibly has supraventricular tachycardia which may precipitate by a premature atrial deplorization. Adenosine is administered to her which will bind and activate the G-protein coupled receptor that has adenosine binding site. This activation leads to the efflux of potassium and the hyperpolarization of supraventricular tissue.