Objective To study the detection method of insulin resistance in congestive heart failure.Methods Levels of fasting plasma insulin and glucose were determined in 41 patients of CHF and 26 normal controls through radioimmunoassay.The application value of the inverse of the product of fasting plasma glucose and insulin (IAI) and the ratio of fasting plasma glucose and fasting insulin (FPG/FINS) were compared.Results IAI levels in patients with CHF were significantly lower than those of the control group(P