AHA Coding Clinic® for ICD-9 - 1987 September - October

His Bundle Electrocardiogram, 37.29

His bundle electrocardiogram, 37.29, is an intracardiac recording of the heart's electrical activity. The technique involves the use of a transvenous electrode catheter (special catheter with three separate electrodes) introduced via the femoral vein and positioned in the right ventricle near the tricuspid valve. The characteristic atrial, His bundle, and ventricular depolarizations are recorded and intervals timed. The His bundle is part of the heart's conduction system. Transmission of cardiac impulse is conducted sequentially through specialized atrial conducting tracts, atrioventricular node, the bundle of His, the bundle branches, the Purkinje fibers, and finally the ventricular muscle. The conduction...

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