The accuracy of the point of care (POC) NT-proBNP ELISA to assess the probability of hidden heart disease from moderate to severe in cats suspected of heart disease was investigated by Machen et al. [57], in a study with 146 asymptomatic cats presenting heart murmur, gallop rhythm, arrhythmia, or cardiomegaly. The gene discussed is NPPB; the disease is Arrhythmia.