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Chronic lymphocytic leukaemia (CLL) is the most common form of leukaemia among adults, particularly in Western nations. The introduction of Bruton's tyrosine kinase (BTK) inhibitors as a treatment of CLL, namely, ibrutinib, which is a first-generation BTK inhibitor, has significantly improved the treatment landscape for CLL. However, ibrutinib has been associated with an increased risk of atrial fibrillation (AF) and hypertension.

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Article Synopsis
  • Ibrutinib, a drug commonly used for B-cell lymphoma, has shown great effectiveness but is linked to serious heart issues like atrial fibrillation and ventricular arrhythmias, raising concerns in both cardio-oncology and hematology.
  • While atrial fibrillation caused by ibritunib is well understood, the mechanisms behind ventricular arrhythmias are still being researched, leading to variability in their reported incidence due to factors like under-recognition.
  • The article aims to provide a thorough overview of the epidemiology, mechanisms, and clinical implications of ibritunib-induced ventricular arrhythmias, suggesting management strategies for patients on this treatment.
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Background: Ibrutinib is a first-line drug that targets Bruton's tyrosine kinase for the treatment of B cell cancer. However, cardiotoxicity induced by ibrutinib is a major side effect that limits its clinical use. This study aimed to investigate the mechanism of ibrutinib-induced cardiotoxicity and evaluate the protective role of metformin.

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Article Synopsis
  • BTK inhibitors are effective for treating B-cell malignancies but are linked to heart issues like atrial fibrillation (AF), the extent and seriousness of which were previously unknown.
  • A study monitored B-cell cancer patients on BTK inhibitors from 2009-2020, revealing that 72.4% developed arrhythmias, with 16.3% experiencing new cases of AF and 14.3% showing high AF burden.
  • Higher AF burden was correlated with increased risk of major cardiac events and mortality, highlighting the need for careful monitoring and management in patients treated with BTK inhibitors.
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Bruton tyrosine kinase (BTK) inhibitors play an important role in targeted treatment of B-cell lymphoproliferative disorders. However, adverse events may limit the proper course of treatment in many patients. The purpose of this study is to compare the risk of cardiovascular and non-cardiovascular adverse events in patients with chronic lymphocytic leukemia (CLL) or small cell lymphocytic lymphoma (SLL) treated with the first-generation BTK inhibitor ibrutinib versus second-generation acalabrutinib, using real-world data from a collaborative multinational network.

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