A 58-year-old man with hypertension and hyperlipidemia presents with a 2-week history of palpitations described as "skipped beats" and a "flip-flop" sensation in the chest, occurring predominantly at rest. He has recently increased his daily coffee intake to 8 cups per day due to work stress and admits to poor sleep and moderate weekend alcohol use. On examination, his heart rate is 68–88 bpm with a distinctly irregular, regularly irregular pattern. A 12-lead ECG is shown. The pattern marked **A** in the diagram demonstrates alternating sinus beats with wide premature ventricular complexes. Which of the following is the MOST APPROPRIATE initial management strategy for this patient?
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