BACKGROUND: The existing electrocardiogram(ECG)measurement strongly depends on medical professionals and inefficient high-intensity,or relies on automatic identification method which is not accurately enough.Thus,this is difficult to meet high-speed testing,accurate results and ease application for common people.OBJECTIVE: To develop a new method that was simple and efficient to apply and very easy to learn.METHODS: Algorithms were programmed and test software was developed by delphi7.0.ECG was drawn on screen.The apex,the starting point and the ending point as well as the J-point of each ECG wave were clicked by mouse or stylus.Then the wave parameters and an initial diagnosis could be quickly obtained by test software.RESULTS AND CONCLUSION: The parameters of ECG waveform such as wave height,wave time,PR interval,ST segment,QT segment,PP/RR time,cardiac electrical axis and so on could be accurately measured,and heart rate,heart rhythm and the deflection of cardiac electrical axis could be diagnosed correctly.The method was simple to learn and easy to imply,and it was also efficient,quick and accurate.Thus,it could greatly improve the efficiency of measurement and analysis for specialists,and could meet application requirements of general medicals and ordinary people.

Objective To investigate the application of liver three-dimensional (3D) visualized reconstruction technique in hepatectomy for children with complicated hepatoblastoma. Methods A retrospective analysis was performed for the clinical data of 30 children with hepatoblastoma who underwent hepatectomy for radical resection in PLA Rocket Force Characteristic Medical Center from January 2018 to October 2020, and according to whether liver 3D visualization with IQQA-Liver system was performed before surgery, the children were divided into 3D reconstruction group with 15 children and control group with 15 children. The two groups were compared in terms of perioperative parameters, short-term prognosis, and follow-up conditions. The independent samples t -test was used for comparison of normally distributed continuous data between two groups, and the Mann-Whitney U test was used for comparison of non-normally distributed continuous data between two groups; the Fisher's exact test was used for comparison of categorical data between two groups. Results Compared with the control group, the 3D reconstruction group had a significantly higher mean age (55.7±10.2 years vs 28.2±2.7 years, P < 0.05) and a significantly higher number of patients with POSTTEXT stage III/VI hepatoblastoma (12 vs 5, P < 0.05) or involvement of the hepatic vein or the inferior vena cava (11 vs 3, P < 0.05). All children completed the surgery successfully, and there were no significant differences between the two groups in blood loss, time of operation, number of times and duration of hepatic portal occlusion, and number of children receiving segmental hepatectomy or partial hepatectomy (all P > 0.05). The median follow-up after surgery was 9.5 months. In the 3D reconstruction group, 2 children experienced recurrence and were diagnosed at 10 and 12 months, respectively, after surgery, and they were treated with chemotherapy at the moment; in the control group, 4 children experienced recurrence, which was higher than that in the 3D reconstruction group ( P =0.651), and among these 4 children, 2 had recurrence at 7 months after surgery, received liver transplantation, and survived up to now, and the other 2 children died shortly after recurrence. Conclusion 3D visualized reconstruction technique helps to perform hepatectomy for children with complicated hepatoblastoma more safely and accurately, especially extended hepatectomy for patients with stage POST TEXT III/IV hepatoblastoma, thereby avoiding liver transplantation.