The CARDIOPROTECT Trial

This trial is to evaluate if dexrazoxane is safer and more effective than liposomal doxorubicin in preventing heart failure events in participants with diffuse large B-cell lymphoma (DLBCL) undergoing either standard of care R-CHOP or pola-R-CHP treatment regiments. The names of the study drugs involved in this study are: * Dexrazoxane (a type of Topoisomerase II Inhibitor) * Liposomal Doxorubicin (a type of Topoisomerase II Inhibitor) * Standard of care R-CHOP treatment regimen (Cyclophosphamide, doxorubicin, vincristine, prednisone, rituximab) * Standard of care pola-R-CHP treatment regimen: Cyclophosphamide, doxorubicin, polatuzumab vedotin-piiq, prednisone, rituximab