# Observational Study of Cardiac Arrhythmias During Treatment With BTK Inhibitors or Venetoclax

> **NCT05724121** · — · RECRUITING · sponsor: **National Heart, Lung, and Blood Institute (NHLBI)** · enrollment: 135 (estimated)

## Conditions studied

- Chronic Lymphocytic Leukemia (CLL)
- Waldenstr(SqrRoot)(Delta)m s Macroglobulinemia
- Mantle Cell Lymphoma
- Sudden Cardiac Death
- Cardiac Arrhythmias
- Hematologic Malignancies

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT05724121
- **Lead sponsor:** National Heart, Lung, and Blood Institute (NHLBI)
- **Sponsor class:** NIH
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** RECRUITING
- **Start date:** 2023-03-01
- **Primary completion:** 2027-04-08
- **Final completion:** 2027-04-08
- **Target enrollment:** 135 (ESTIMATED)
- **Last updated:** 2026-05-05


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT05724121

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT05724121, "Observational Study of Cardiac Arrhythmias During Treatment With BTK Inhibitors or Venetoclax". Retrieved via AI Analytics 2026-06-26 from https://api.ai-analytics.org/clinical/NCT05724121. Licensed CC0.

---

*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*