* : p < 0.05. Age was significantly higher for patients in AF group, p = 0.002. Ibrutinib dose was significantly lower among patients who developed AF, p = 0.025. HTN: hypertension. HLD: hyperlipidemia. DM: diabetes mellitus. CAD: coronary artery disease. HF: history of heart failure. MR: moderate or severe mitral regurgitation. AS: moderate or severe aortic stenosis. CLL: chronic lymphocytic leukemia. SLL: small lymphocytic lymphoma.