The Sinuatrial Node (SAN, green), located at the roof of the right atrium close to the junction of the superior vena cava, acts as the...

Orthodromic Reentry Tachycardia - conduction via AV node-His-Purkinje system to the ventricle, and retrograde conduction via accessory...

You are handed the ECG of an 8-year-old boy for routine assessment. He is currently being treated with azithromycin for respiratory...