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FENG YU, CAO HUI, ZHANG YANBIN. EFFECTS OF ACUTE HYPERGLYCEMIA AND INSULIN INTERVENTION ON THE SPONTANEOUS FIELD POTENTIAL OF SINOATRIAL NODE TISSUE BY USING MICROELECTRODE ARRAYS. J MECH MED BIOL 2015. [DOI: 10.1142/s0219519415500463] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Traditional studies on the relationship between hyperglycemia and heart diseases generally focused on the impact of chronic and long-term effect of diabetes on cardiac functions. Most of the methods were culturing myocardial cells and giving outside stimulations. However, recent studies show that acute hyperglycemia might play a significant role in spontaneous cardiac electrophysiology. In this research we applied microelectrode arrays (MEA) to record the spontaneous sinoatrial node field potentials of C57/BL6J mice and analyzed the effects of different glucose concentrations in time domain and frequency domain by using statistical method, vector maps and fast Fourier transform (FFT). Meanwhile, we studied the effects of insulin interference in the experimental process. When the concentration of the glucose solution was greater than 40 mmol/L, the spontaneous sinoatrial node field potential changed markedly. In the time domain, the amplitude decreased rapidly and the conductive characteristics were disordered. In the frequency domain, the two spectrum peaks decreased rapidly. These changes were irreversible. However, insulin preconditioning could inhibit the impact of high glucose.
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Affiliation(s)
- YU FENG
- State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, P. R. China
| | - HUI CAO
- State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, P. R. China
| | - YANBIN ZHANG
- State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, P. R. China
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Chen J, Lin Y, Yu J, Chen W, Xu Z, Yang Z, Zeng C, Li W, Lai X, Lu Q, Zhou J, Tian B, Xu J, Lin Y, Du Z, Zhang A. Changes of Virtual Planar QRS and T Vectors Derived from Holter in the Populations with and without Diabetes Mellitus. Ann Noninvasive Electrocardiol 2015; 21:69-81. [PMID: 25940734 PMCID: PMC6931701 DOI: 10.1111/anec.12276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Aims Research related to type 2 diabetes mellitus (DM) and parameters of electrocardiography (ECG) was limited. Patients with and without DM (NDM) were randomly enrolled in a study to exploit the influence of DM on planar QRS and T vectors derived from the Virtual Holter process. Methods A total of 216 (NDM) and 127 DM patients were consecutively and randomly recruited. We selected a 1‐minute length of ECG, which was scheduled for analysis at 4 AM. After a series of calculating algorisms, we received the virtual planar vector parameters. Results Patients with DM were elderly (65.61 ± 12.08 vs 59.41 ± 16.86 years, P < 0.001); higher morbidity of hypertension (76.38% vs 58.14%, P < 0.001) and coronary artery disease (44.09% vs 32.41%, P = 0.03); thicker interventricular septum (10.92 ± 1.77 vs 10.08 ± 1.96 mm, P < 0.001) and left ventricular posterior wall (9.84 ± 1.38 vs 9.39 ± 1.66 mm, P = 0.03); higher lipid levels and average heart rate (66.67 ± 12.04 vs 61.87 ± 13.36 bpm, P < 0.01); higher angle of horizontal QRS vector (HQRSA, –2.87 ± 48.48 vs –19.00 ± 40.18 degrees, P < 0.01); lower maximal magnitude of horizontal T vector (HTV, 2.33 ± 1.47 vs 2.88 ± 1.89 mm, P = 0.01) and maximal magnitude of right side T vector (2.77 ± 1.55 vs 3.27 ± 1.92 mm, P = 0.03), and no difference in angle of frontal QRS‐T vector (FQRSTA, 32.77 ± 54.20 vs 28.39 ± 52.87 degrees, P = 0.74) compared with patients having NDM. After adjusting for confounding factors, DM was significantly effective on FQRSTA (regression coefficient –40.0, 95%CI –66.4 to –13.6, P < 0.01), HQRSA (regression coefficient 22.6, 95%CI 2.5 to 42.8, P = 0.03), and HTV (regression coefficient 0.9, 95%CI 0.2 to 1.7, P = 0.01). Confounding factors included: sex, 2‐hour postprandial blood glucose, smoking, triglyceride, apolipoprotein A, creatinine, left ventricular ejection fraction, and average heart rate. Conclusions The risk factors of DM and lipid metabolism abnormality particularly apolipoprotein A significantly modified parameters of virtual planar QRS and T vector, including frontal QRS‐T angle.
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Affiliation(s)
- Jia Chen
- First Affiliated Hospital of Jinan University, Second Department of Cardiology, Guangdong No. 2 Provincial People's Hospital, Guangzhou, China
| | - Yubi Lin
- Department of Cardiology, First Affiliated Hospital of Jinan University, Guangzhou, China.,Guangdong Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangdong General hospital, Guangzhou, 510080, P.R., China
| | - Jian Yu
- Department of Cardiology, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Wanqun Chen
- Medical College of Jinan University, Guangzhou, China
| | - Zhe Xu
- Division of Cardiac Surgery, First Affiliated Hospital of Sun-Yat-sen University, Guangzhou, China
| | - Zhenzhen Yang
- Department of Cardiology, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Chuqian Zeng
- Department of Cardiology, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Wenfeng Li
- Department of Cardiology, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Xiaoshu Lai
- Department of Cardiology, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Qiji Lu
- Department of Cardiology, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Jingwen Zhou
- Department of Cardiology, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Bixia Tian
- Department of Cardiology, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Jing Xu
- Department of Cardiology, First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Yanping Lin
- Medical College of Guangdong Province, Zhanjiang, China
| | - Zuoyi Du
- Second Department of Cardiology, Guangdong No. 2 Provincial People's Hospital, Guangzhou, China
| | - Aidong Zhang
- Department of Cardiology, First Affiliated Hospital of Jinan University, Guangzhou, China
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Haidara MA, Assiri AS, Youssef MA, Mahmoud MM, Ahmed M S E, Al-Hakami A, Chandramoorthy HC. Differentiated mesenchymal stem cells ameliorate cardiovascular complications in diabetic rats. Cell Tissue Res 2014; 359:565-575. [PMID: 25413785 DOI: 10.1007/s00441-014-2034-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Accepted: 10/14/2014] [Indexed: 02/05/2023]
Affiliation(s)
- Mohamed A Haidara
- Department of Physiology, College of Medicine, King Khalid University, Abha, Saudi Arabia
- Department of Physiology, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Abdullah S Assiri
- Center for Stem Cell Research, College of Medicine, King Khalid University, Abha, Saudi Arabia
- Department of Cardiology, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Mary A Youssef
- Department of Physiology, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Manal M Mahmoud
- Department of Physiology, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Eajaz Ahmed M S
- Department of Physiology, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Ahmed Al-Hakami
- Center for Stem Cell Research, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Harish C Chandramoorthy
- Center for Stem Cell Research, College of Medicine, King Khalid University, Abha, Saudi Arabia.
- Department of Clinical Biochemistry, College of Medicine, King Khalid University, Abha, Saudi Arabia.
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