At the 2021 Heart Rhythm Society (HRS) meeting, Biosense Webster introduced the Octaray high-density mapping catheter. With more than 40 mapping electrodes, it can map the electrical activity in the heart much faster and in greater detail than pevious generation mapping catheters. It is hoped the greater detail in EP mapping will enable better ablation procedure guidenace and outcomes. In the past few years, high density mapping systems have become a growing trend in EP labs. #HRS21 #HRS2021 | D