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ECG and Echocardiographic Findings of Female Hypertension (fHTN) in the Cardiology Department of the University Hospital Gabriel Touré (UH-GT)

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World Journal of Cardiovascular Diseases 2023年第10期13卷 646-656页

作者： Hamidou Oumar Bâ Ibrahima Sangaré Youssouf Camara Kassim Kamaté tawoufik tchedre Georges Rosario Christian Millogo Djénébou Traoré Noumou Sidibé Fousseyni Samassékou Massama Konaté Coumba Thiam Doumbia Asmaou Maiga Réné-Marie Dakouo Hamidou Camara Adama Sogodogo Boubacar Diarra Mamadou Touré Boubacar Sonfo Aladji Traoré Mamadou Diakité Ilo Bella Diall Ichaka Menta Cardiology University Hospital Gabriel Touré Bamako Mali Cardiology University Hospital Sidy Bocar Sall Kati Mali Cardiology University Hospital Yalgado Ouédraogo Ouagadougou Burkina-Faso Internal Medecine University Hospital Point G Bamako Mali Cardiology University Hospital “H&ocircpital du Mali” Bamako Mali Cardiology University Hospital Mother-Children Bamako Mali

Introduction: In our setting there is a lack of publications on female hypertension in general population motivating this study to look for electro- and echocardiographic findings of female hypertension. Methods: We performed a cross-sectional study during 6 months in the cardiology department of the UH-GT including 324 female patients aged 18 and more seen in the outpatient unit and by whom the diagnosis of hypertension was set. All patients consented to be study participants after receiving clearly information about the study and that care giving will not be affected by their eventual refusal. Data collection has been done with all needed confidentiality rules. A survey formular was used to collect data in order to record them in an Access database. Analysis was done using IBM SPSS software. Quantitative data are presented as mean with standard deviation and qualitative as proportion. Level of significance for statistic test was set at 5%. Results: During the study time 324 among 524 hypertensive patients visited our outpatient unit giving a prevalence of fHTN of 61.8%. The means for age, body mass index (BMI) in female hypertensive patients were respectively 52 ± 14.461 years and 27.35 ± 06.585 Kg/m2. Main ECG findings were left ventricular hypertrophy (LVH) and sinus tachycardia with respectively 93.6% and 46.4% followed by isolated ventricular extrasystole with 33.7%. Echocardiography findings included LVH, relative wall thickness (RWT) and reduced ejection fraction (EF) in respectively 41.05%, 37.35% and 21.91%. The left ventricular mass (LV) mass and geometry were abnormal in 44.4% and 37.3%. Remodeling as geometry modification (18.2%) and mitral flow Type 2 (90.4%) have been the most abnormal findings. Conclusion: Hypertension induced modifications mainly LVH in ECG and Echocardiography in female patients less than encountered among male hypertensive patients.

关键词： Hypertension Female ECG Echocardiography Mali

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Investigating the Impact of Base Heating and External Electric Field on PV Cell Performance under Intense Illumination

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Open Journal of Applied Sciences 2024年第5期14卷 1305-1314页

作者： Boubacar Soro Guy Serge Tchouadep Esso-Ehanam tchedre Kpeli Ousmane Souliga Adama Ouedraogo Issa Zerbo Martial Zoungrana Laboratory of Thermal and Renewable Energies Universit&#233 Joseph KI-ZERBO Ouagadougou Burkina Faso Institut des Sciences et Technologie Ecole Normale Sup&#233rieure Ouagadougou Burkina Faso

The characterization of the performances of a PV cell is linked to intrinsic factors of this cell. It is therefore important for us to identify the favorable or unfavorable conditions that affect the performance of PV cells. It is from this perspective that it seems judicious to us to study the simultaneous influence of the heating of the base and an external electric field on the performance of a PV cell under intense illumination of 50 suns. Two phenomena contribute to the heating of the base of a PV cell which is heating due to the transfer by conduction of solar radiation energy received by the surface of the PV cell and the heat generated inside the PV cell by various phenomena linked to the movement of photogenerated charged carriers. In this study, we take into account the heating linked to the movement of the charged carriers in the base. After a mathematical modeling of the PV cell considered, some hypotheses are formulated and the expressions of the electrical parameters are established as a function of the electric field and base temperature. Subsequently, we use numerical simulation to highlight the behavior of theses parameters as a function of temperature and of the intensity of the electric field. The results show that for any given temperature, the orientation of the electric field as considered in our work improves the performance of the PV cell while high temperatures degrade these performances. Furthermore, the analysis of the curves shows that the harmful effect of temperature on the performance of a PV cell is more accentuated at large values of electric field.

关键词： Collisions Thermalization Braking Electric Strength Base Temperature

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