Echo quiz – Cardiology MCQ – Answer

Correct answer: c) Pacemaker lead

Chiari network is seen only in the right atrium. The structure marked is extending across the tricuspid valve into the right ventricle. Central venous catheter tip is usually placed in the superior vena cava. Occasionally the tip of a central venous catheter placed at bedside without fluoroscopic guidance can be in the right atrium. But it seldom crosses the tricuspid valve into the right ventricle. An implantable defibrillator lead also traverses the tricuspid valve into the right ventricle. The defibrillator lead is much thicker due to the presence of the shocking coil in the right ventricle.