First degree AV block results from a prolonged transmission of the electrical impulse through the AV junction (AV node and the Bundle of His). The significant finding of this rhythm is a prolonged PR interval of more than 20 seconds. The underlying rhythm should be identified and named prior to claiming a first-degree AV block. For example, this rhythm is a normal sinus rhythm WITH a first-degree AV block
The process involves a medical history assessment, physical examination, electrocardiogram (ECG), Holter monitoring, and additional tests if necessary.
Although usually asymptomatic and benign, regular ECG monitoring is essential. No treatment is needed if asymptomatic; if symptoms arise, options include lifestyle changes, managing risk factors, and potential medications or interventions.
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