Atrioventricular block, complete

This code signifies a complete interruption of electrical impulse conduction from the atria to the ventricles of the heart. In this condition, no atrial impulses reach the ventricles, leading to independent atrial and ventricular rhythms, often with a slow ventricular escape rhythm.

Apply this code when documentation explicitly states "complete atrioventricular block," "third-degree AV block," or "complete heart block." This diagnosis is typically confirmed by an electrocardiogram (ECG) showing no correlation between P waves and QRS complexes.

• Differentiate from other degrees of AV block (first-degree, second-degree Mobitz I or II) as these have distinct codes.
• Always look for the specific terminology "complete" or "third-degree" in the physician's notes.
• Code any associated symptoms or underlying causes, such as syncope or myocardial infarction, as secondary diagnoses.