Heart rhythm monitoring in patients starting a new blood cancer treatment

This trial is testing whether a tiny heart monitor called an implanted loop recorder can safely and effectively detect heart rhythm problems in patients taking BTK inhibitors — a newer class of medication for chronic lymphocytic leukemia and related blood cancers. The device, smaller than a grain of rice, is inserted under the skin and continuously monitors your heart for up to five years. Researchers want to understand how often heart rhythm problems occur with this treatment and how doctors should respond when they do.

BTK inhibitors have helped many patients with blood cancers, but doctors have noticed that some patients develop irregular heartbeats while taking this medication. Right now, there's no standard way to catch these problems early — some patients may have dangerous heart rhythms without knowing it. This study aims to see if continuous monitoring can help detect and manage these issues before they become serious.