Keywords: ABVD, adriamycin, bleomycin, vinblastine, dacarbazine; CMR, cardiac magnetic resonance; ECG, electrocardiography; EF, ejection fraction; FDG, fluorodeoxyglucose; LGE, late gadolinium enhancement; PET-CT, positron emission tomography-computed tomography; R-EPOCH, ritixubimab, etoposide, prednisone, vincristine, cyclophosphamide, doxorubicin; TTE, transthoracic echocardiography; TVP, transvenous pacemaker; bradycardia; cardiac magnetic resonance; cardiac masses; conduction disease; lymphoma; pacemaker.