Anomalous atrioventricular excitation

This code represents an electrical abnormality of the heart where an accessory pathway bypasses the normal atrioventricular (AV) node, leading to premature ventricular excitation. This pre-excitation can result in various arrhythmias, most notably Wolff-Parkinson-White (WPW) syndrome.

Use this code when documentation clearly indicates the presence of an anomalous atrioventricular excitation, such as a bypass tract or pre-excitation syndrome. This diagnosis is typically made based on characteristic electrocardiogram (ECG) findings (e.g., short PR interval, delta wave) and/or electrophysiological studies.

• Do not use this code for other types of conduction disorders unless an accessory pathway is explicitly documented.
• Consider co-coding any associated arrhythmias (e.g., paroxysmal supraventricular tachycardia) if documented.
• Ensure the medical record specifies "anomalous" or "accessory" pathway to support this specific diagnosis.