We report the first clinical observation of chronic heart failure which can be directly related to administration of bortezomib. This relationship is strongly suggested by the pharmacological Begaud's score for drug adverse events with a high degree of imputability. This observation is further supported by the report of all other cases of cardiac failure associated with bortezomib, reported in the French pharmacovigilance database (table 1).align=""left"">ass=""boldFont"">Patients align=""left"">ass=""boldFont"">Age (Year) align=""left"">ass=""boldFont"">Gender align=""left"">ass=""boldFont"">Disease align=""left"">ass=""boldFont"">Cardiac Risk Factor align=""left"">ass=""boldFont"">Prior Chemotherpy regimens align=""left"">ass=""boldFont"">N¡ãbortezomib containing cycles align=""left"">ass=""boldFont"">Cumulated Dose (mg/mass=""boldFont"">2ass=""boldFont"">) align=""left"">ass=""boldFont"">Cardiac complication align=""left"">ass=""boldFont"">death align=""left"">ass=""boldFont"">Imputability align=""center"">#1 align=""center"">79 align=""center"">F align=""center"">MM align=""center"">HTA align=""center"">0 align=""center"">1 align=""center"">2,64 align=""center"">Acute Heart Failure align=""center"">yes align=""center"">I3 align=""center"">#2 align=""center"">79 align=""center"">F align=""center"">MM align=""center"">0 align=""center"">1 align=""center"">6 align=""center"">31,2 align=""center"">Acute Heart Failure align=""center"">No align=""center"">I1 align=""center"">#3 align=""center"">71 align=""center"">F align=""center"">MM align=""center"">0 align=""center"">0 align=""center"">6 align=""center"">31,2 align=""center"">Acute Heart Failure align=""center"">No align=""center"">I1 align=""center"">#4 align=""center"">54 align=""center"">F align=""center"">MM align=""center"">0 align=""center"">2 align=""center"">1 align=""center"">4,45 align=""center"">Cardiogenic Shock align=""center"">Yes align=""center"">I1 align=""center"">#5 align=""center"">74 align=""center"">M align=""center"">MM align=""center"">0 align=""center"">0 align=""center"">1 align=""center"">3,9 align=""center"">Acute Heart Failure align=""center"">Yes align=""center"">I4 align=""center"">#6 align=""center"">61 align=""center"">F align=""center"">MM align=""center"">HTA align=""center"">4 align=""center"">10 align=""center"">54,3 align=""center"">Acute Heart Failure align=""center"">No align=""center"">I1 align=""center"">#7 align=""center"">69 align=""center"">F align=""center"">MM align=""center"">0 align=""center"">0 align=""center"">3 align=""center"">15,6 align=""center"">Acute Heart Failure align=""center"">No align=""center"">I1 align=""center"">#8 align=""center"">54 align=""center"">M align=""center"">MM align=""center"">0 align=""center"">5 align=""center"">3 align=""center"">15,6 align=""center"">Acute Heart Failure align=""center"">No align=""center"">I1