The authors studied specific clinical features of ischemic chronic heart failure (CHF) in elderly patients, in comparison with the analytical parameter of CHF diagnostic quality (CHF diagnostic index, CHFDI). The main clinical, laboratory, and instrumental parameters, associated with CHF hypo- and hyper-diagnostics in elderly patients were identified. The analysis of power and directions of the CHFDI associations allowed the authors to develop an algorithm for CH D diagnostics in elderly patients with normal body weight or obesity.