LV Lead Position Index (LVLPI) Calculator

LV Lead Position Index (LVLPI): Explanation and Clinical Context The LV Lead Position Index (LVLPI) is a quantitative measure used to assess the position of the left ventricular (LV) lead relative to the apical and basal segments of the LV in patients undergoing cardiac resynchronization therapy (CRT). It is calculated by dividing the distance from the LV lead to the apex of the left ventricle by the distance to the base of the left ventricle. A lower LVLPI indicates a more basal placement, which has been associated with improved clinical response to CRT, including higher rates of reverse remodeling and better functional outcomes.

Optimal CRT response is typically observed when LVLPI is below 0.65, although patient-specific anatomical and electrophysiological factors may influence outcomes. This tool allows clinicians to quickly assess lead positioning during device implantation and optimize CRT therapy accordingly.