AVP and myotonic dystrophy type 1: A recent, intriguing study found that increased levels of serum NT-proBNP and copeptin (a C-terminus peptide generated from pre pro-peptide of arginine vasopressin), two tests used in monitoring heart failure, might be predictors of Afib onset in a DM1 population, suggesting a potential for identifying patients requiring more frequent monitoring and follow-up [40].