Final Answer:
The first-line treatment for suppressing symptomatic premature ventricular contractions (PVCs) in patients without identifiable structural heart disease is usually beta-blockers. These medications, such as metoprolol or propranolol, are effective in reducing the frequency and severity of PVCs by blocking the action of adrenaline and decreasing the excitability of the heart.
Step-by-step explanation:
Symptomatic PVCs can cause palpitations, chest discomfort, or a feeling of skipped heartbeats. In patients without structural heart disease, beta-blockers are often the initial choice for managing PVCs. Beta-blockers work by blocking the effects of adrenaline on the heart, reducing the frequency of premature contractions. They are generally well-tolerated and have proven efficacy in many cases.