How to treat sinus rhythm with borderline first-degree atrioventricular block?

Sinus rhythm with borderline first-degree atrioventricular block generally does not require specific treatment. Details are as follows:

First-degree atrioventricular (AV) block associated with sinus rhythm refers to a prolongation of AV conduction time beyond the normal range, but each atrial excitation is still conducted to the ventricles; it is also known as AV conduction delay. First-degree AV block can occur in healthy individuals and is often related to increased vagal tone, typically occurring during nighttime. Some healthy adults, athletes, and children may also exhibit first-degree AV block, which may likewise be associated with heightened vagal tone. When first-degree AV block arises from such normal physiological causes rather than pathological conditions, it does not lead to significant pathophysiological changes or cause noticeable symptoms, and therefore does not require special treatment.

It is recommended to get adequate rest, avoid overwork, excessive fatigue, and mental stress, which can help relieve symptoms and prevent recurrence. In terms of diet, consuming more fresh leafy vegetables and fruits rich in potassium and magnesium ions can help maintain long-term stability of cardiac conduction function.