Characteristics of diastolic function assessment Characteristics of deformation rate index: We use the control quart ile to determine the rate of patients with myocardial deformation on tissue marker ultrasound in patients with CKD, the results show: 13, 7% of patients had a decrease in early longitudinal deformation, 10, 0% of patients decreased early peripheral deformation and 13, 2% of patients decreased early lateral deformation.