In this observational, prospective study, patients affected by B-cell Lymphoma and candidate to chimeric antigen receptor-T (CAR-T) cell infusion will be evaluated at three timepoints to establish the rate of cardiac dysfunction, defined according to 2022 European Society of Cardiology Cardio-Oncology guidelines. Echocardiography, physical examination and cardiac/inflammatory biomarkers will be performed prior to CAR-T cell infusion and followed at 7 days and 1 month.

Patients will perform clinical evaluation, transthoracic echocardiogram with speckle tracking analysis and blood samples (including cardiac biomarkers of damage and fibrosis) prior to CART infusion, after 7 days and 1 month following CART infusion. Rate of Cytokine Release Syndrome and use of interleukin-6 inhibitors will be also registered.

Inclusion Criteria:

• Age>18 years old;
• Patients affected by relapsed and/or refractory diffuse large B-cell lymphoma, follicular lymphoma, primary mediastinal B-cell lymphoma, mantle cell lymphoma or B-cell lymphoblastic leukemia, candidate treatment with chimeric antigen receptor-T cell therapy at the Hematology division of Policlinico Universitario Agostino Gemelli, Rome;
• Patients with left ventricular ejection fraction >50%.

Exclusion Criteria:

• Age<18 years old;
• Patients who denied to participate to the study;
• Patients with left ventricular ejection fraction<50%.

Patients affected by relapsed and/or refractory diffuse large B-cell lymphoma, follicular lymphoma, primary mediastinal B-cell lymphoma, mantle cell lymphoma or B-cell lymphoblastic leukemia, scheduled to receive treatment with chimeric antigen receptor-T cell therapy at the Hematology division of Policlinico Universitario Agostino Gemelli, Rome will be firstly evaluated. If they exclusion criteria are not present, the will be included in the study protocol and evaluated by the Cardio-Oncology outpatient service.