What are the typical symptoms associated with a first-degree AV block?

In the context of first-degree AV block, the most common symptom is often a lack of noticeable symptoms at all for the majority of patients. First-degree AV block is characterized by a gradual prolongation of the PR interval on the electrocardiogram, which means that while there is a delay in the conduction through the atrioventricular node, it usually does not lead to any significant issues or symptoms for the affected individuals.

This type of heart block is often discovered incidentally during an ECG assessment because patients typically maintain an adequate heart rate and rhythm. As a result, many individuals with first-degree AV block might not experience any discomfort, such as severe chest pain, dizziness, fainting, or palpitations that are more commonly associated with higher degrees of AV block. The benign nature of first-degree AV block is why healthcare providers often monitor these patients rather than treat them aggressively.