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Three-dimensional echocardiographic image of the His bundle pacing lead, seen from the right ventricular apex. The tip of the lead (white arrow) was positioned under the tricuspid valve through the anteroseptal commissure. AV = aortic valve; CS = coronary sinus; HBP = His bundle pacing; MV = mitral valve; RA = right atrium; RV = right ventricle; TV = tricuspid valve.
