Question

A woman 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?

Answer 1

The drug type used in this case should be beta blocker drug who has G protein as transduction unit where beta 1 or beta 2 adrenergic receptor is blocked.

Answer 2

Answer: increase reflux of potassium

Step-by-step 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.