Increased Platelet-to-Lymphocyte Ratios and Low Relative Lymphocyte Counts Predict Appropriate Shocks in Heart Failure Patients with ICDs

Background Platelet-to-lymphocyte ratio (PLR) and relative lymphocyte count (L%) are commonly available tests that can be obtained from complete blood count. The aim of this study was to investigate the association between appropriate defibrillator therapy and PLR, and whether decreased lymphocyte count may predict appropriate implantable cardioverter defibrillator (ICD) shocks in heart failure (HF) patients.