This paper introduces a practical and real -time R wave detection algorithm as well as its realization and adjustment by DSP/BIOS of RTOS. With DSP/BIOS of RTOS applied, the adjustment and evaluation of real-time program for ECG are facilitated and the program stability is enhanced.

QRS-waves integral can reflect the activities of ventricular depolarization. In this paper are analyzed the nonlinear characters in QRS-waves integral: reconstructing state space with these integral signals after nonlinear noise reduction, calculating its attractor dimension and the largest Lyapunov exponents. With the results based on MIT-BIH database we proposed that QRS-waves integral is of chaos nature. When compased with HRV nonlinear analysis, QRS-waves integral analysis was found to be of more advantages in some cases such as premature ventricular contraction. This QRS-waves integral nonlinear analysis may be of use in evaluating clinical cardiac function.
Electrocardiography ; Humans ; Nonlinear Dynamics ; Signal Processing, Computer-Assisted

Objective: To observe the co-effect of antioxidant compound, soybean isoflavone (SI), VC and VE on glucose and insulin response after oral glucose load in Type 2 Diabetes Mellitus (T2DM) . Methods: 96 selected T2DM patients (50% male, 50% female) were randomly divided into 4 groups according to the dosage of the compound given , none (group B), low dosage (group C), medium dosage (group D) and high dosage (group E) . The normal control (group A) included 24 persons half male, half female . Blood glucose and insulin were determined at OGTT 0 h, 1 h, 2 h, 4 h, 6 h, and the areas under the curve (AUC) of blood insulin/glucose were calculated. Results: The AUC of blood insulin/glucose of male was higher than female in control group, but both were lower than those of four diabetes groups. In both genders of the diabetes groups, blood insulin AUC of group C, D, E was lower than group B, blood glucose AUC of group D, E was lower than group C and B. There was significant difference in blood insulin and glucose AUC of group E as compared to group B in female (P

The dynamic changes of synchronous 12-lead ECG signal's correlation dimension (D2) of an anesthetized rabbit were investigated primarily under three different pathologic conditions. The results showed that the D2 derived from different lead signals was not a constant whether the rabbit was in normal state or in emergent myocardial infarction condition, it demonstrated distribution characteristic. Compared with the same lead signal, D2 of limb lead almost kept constant, D2 of chest lead got higher when the sphere of emergent ischemia extended larger. D2 showed the potential application in the diagnosis of coronary heart disease.
Animals ; Electrocardiography ; Myocardial Infarction ; physiopathology ; Nonlinear Dynamics ; Rabbits ; Signal Processing, Computer-Assisted

Public welfare orientation is the core requirement of public hospital reform. A profound understanding of the connotation of public welfare in public hospitals is related to the effectiveness of deepening the reform and implementation of public hospitals guided by public welfare. The author reviewed and sorted out the historical evolution process of public hospital reform guided by public welfare, summarized and condensed the core connotation of public hospital public welfare, including " legal obligations, system concepts, people′s positions, and inclusive goals", and introduced the practice of deepening the public welfare reform of public hospitals based on the connotation of Union Hospital affiliated with Tongji Medical College of Huazhong University of Science and Technology based on this connotation, focusing on " party building, medical technology, health emergency response, improvement of services, salary distribution, economic operation, resource expansion and sinking" .

Objective    To investigate the predictive value of volatile organic compounds (VOCs) on pulmonary nodules in people aged less than 50 years. Methods    The 147 patients with pulmonary nodules and aged less than 50 years who were treated in the Department of Thoracic Surgery of Sichuan Cancer Hospital from August 1, 2019 to January 15, 2020 were divided into a lung cancer group and a lung benign disease group. The lung cancer group included 36 males and 68 females, with the age of 27-49 (43.54±5.73) years. The benign lung disease group included 23 males and 20 females, with the age of 22-49 (42.49±6.83) years. Clinical data and exhaled breath samples were collected prospectively from the two groups. Exhaled breath VOCs were analyzed by gas chromatography mass spectrometry. Binary logistic regression analysis was used to select variables and establish a prediction model. The sensitivity, specificity, and area under the receiver operating characteristic (ROC) curve of the prediction model were calculated. Results    There were statistically significant differences in sex (P=0.034), smoking history (P=0.047), cyclopentane (P=0.002), 3-methyl pentane (P=0.043) and ethylbenzene (P=0.009) between the two groups. The sensitivity, specificity and area under the ROC curve of the prediction model with gender, cyclopentane, 3-methyl pentane, ethylbenzene and N,N-dimethylformamide as variables were 80.8%, 60.5% and 0.781, respectively. Conclusion    The combination of VOCs and clinical characteristics has a certain predictive value for the benign and malignant pulmonary nodules in people aged less than 50 years.

Chemotherapy-induced complications, particularly lethal cardiovascular diseases, pose significant challenges for cancer survivors. The intertwined adverse effects, brought by cancer and its complication, further complicate anticancer therapy and lead to diminished clinical outcomes. Simple supplementation of cardioprotective agents falls short in addressing these challenges. Developing bi-functional co-therapy agents provided another potential solution to consolidate the chemotherapy and reduce cardiac events simultaneously. Drug repurposing was naturally endowed with co-therapeutic potential of two indications, implying a unique chance in the development of bi-functional agents. Herein, we further proposed a novel "trilogy of drug repurposing" strategy that comprises function-based, target-focused, and scaffold-driven repurposing approaches, aiming to systematically elucidate the advantages of repurposed drugs in rationally developing bi-functional agent. Through function-based repurposing, a cardioprotective agent, carvedilol (CAR), was identified as a potential neddylation inhibitor to suppress lung cancer growth. Employing target-focused SAR studies and scaffold-driven drug design, we synthesized 44 CAR derivatives to achieve a balance between anticancer and cardioprotection. Remarkably, optimal derivative 43 displayed promising bi-functional effects, especially in various self-established heart failure mice models with and without tumor-bearing. Collectively, the present study validated the practicability of the "trilogy of drug repurposing" strategy in the development of bi-functional co-therapy agents.