Objectives To discuss the significance of HRV in hypertension and type 2 diabetes.
Methods In 45 elderly hypertension patients (A group) and 32 elderly patients with hypertension and type 2 diabetes mellitus and 55 healthy elderly persons (controlled group), 24 h electrocardiogram were recorded and analysed.
Results In the elderly patients (A group), the SDNN, SDANN, SDNN-index, rMSSD, PNN50 were 122.07±20.01 ms, 105.49±18.63 ms, 44.52±13.76 ms, 23.97±6.38 ms, 6.71±3.67% retrospectively. In the B group, the SDNN, SDANN, SDNN-index, rMSSD, PNN50 were 93.35±21.01 ms, 81.72±17.89 ms, 33.91±10.98 ms, 19.04±8.01 ms, 3.15±2.21% retrospectively. In controlled group, the SDNN, SDANN, SDNN-index, rMSSD, PNN50 were 132.46±19.23 ms, 129.58±20.03 ms, 57.51±16.79 ms, 37.13±13.78 ms, 13.13±11.01% retrospectively. The results showed that SDNN, SDANN, SDNN index, RM SSD, PNN 50 in patients with hypertension and hypertension with type 2 diabetes mellitus were much lower than those in the normal control group, especially in the hypertension with type 2 diabetes mellitus (p<0.05).
Conclusions The elderly patients with hypertension and type 2 diabetes mellitus tend to have more ventricular arrhythmias, ischaemic ST segment depression and less HRV.