Wigner-Ville Distribution Based ECG Arrhythmia Detection for Telemedicine Applications

24th Signal Processing and Communication Application Conference (SIU) -- MAY 16-19, 2016 -- Zonguldak, TURKEYWOS: 000391250900488While the world's population is growing, average life expectancy is increasing. As a result, the growing elderly population is profoundly affecting the delivery of healthcare for everyone and in particular for those with chronic diseases. The remote monitoring of chronic patients may be achieved by a telemedicine system utilizing today's information and mobile communication technologies. In this study, an ECG arrhythmia detection algorithm based on Wigner-Ville distribution is developed., The performance of the method is tested on data obtained from the PhysioNet database.IEEE, Bulent Ecevit Univ, Dept Elect & Elect Engn, Bulent Ecevit Univ, Dept Biomed Engn, Bulent Ecevit Univ, Dept Comp Eng

Detection of ECG Arrhythmia Using Large Choi Williams Time-Frequency Feature Set

Medical Technologies National Congress (TIPTEKNO) -- OCT 12-14, 2017 -- TRABZON, TURKEYWOS: 000427649500064Early detection and monitoring of heart diseases increase human quality of life and this can prevent negative consequences. It is even more important because it can prevent sudden deaths. in today's technology, these operations can be done with telemedicine systems. in this work, appropriate methods have been proposed for telemedicine systems. the proposed system is of two classes and is based on detection of arrhythmia from healthy and diseased ECG signals. MIT-BIH Arrhythmia database was used in the study. A total of 103026 R-R interval were used in this database. in this study, the Choi-Williams transformation is used as an feature extraction method. the performance results are given as accuracy, specificity and positive predictive accuracy, respectively 94.67%, 94.97%, 92.57%, 97.36%, 97.23%IEEE Turkey Sec

Histopathological Findings of Cystic Endometrial Morphology Based on Ultrasonographic Imaging in Premenopausal Women

Objective: To evaluate the histopathological findings of cystic endometrial morphology based on ultrasonographic imaging in premenopausal women. Study Design: The medical records of 3607 premenopausal women that underwent ultrasonographic examination at a tertiary care center were reviewed, as were endometrial biopsy findings in 816 of the women. These 816 women were divided in 2 groups according to ultrasonographic endometrial findings: the cystic group and the non-cystic group. Clinical and histopathological findings in the 2 groups were compared. Statistical analysis was performed using independent samples t test, chi-square test, and binary logistic regression analysis. Results: Three hundred and eighty one (46.7%) of the women that underwent endometrial biopsy had cystic endometrium, whereas 435 (53.3%) had non-cystic endometrium. The most common histopathological finding in the cystic group was endometrial hyperplasia without atypia (44.6%). Cystic morphology was nearly 8-fold more common in the women with endometrial hyperplasia without atypia (95% CI: 5.43-11.67). The premalignant and malignant pathology rates in the cystic group and non-cystic group were similar (1.1% vs. 0.5% [p=0.426] and 0.8% vs. 0.5% [p=0.669], respectively). Secretory endometrium was less common in the cystic group than in the non-cystic group (5.0% vs. 37.9% [p< 0.001]) Conclusion: Cystic endometrial morphology based on ultrasonographic imaging was more common in women with endometrial hyperplasia without atypia. There wasn’t an association between cystic endometrium and other endometrial pathologies or functional endometrium. Keywords: Cystic endometrium, Endometrium, Endometrial hyperplasia, Premenopausal, Ultrasonograph

Is a History of Cesarean Section a Risk Factor for Abnormal Uterine Bleeding in Patients with Uterine Leiomyoma?

Objectives: To determine whether a history of cesarean section was a risk factor for abnormal uterine bleeding in patients with uterine leiomyomas, and to identify other risk factors for this symptom. Methods: We analyzed retrospectively, the medical records of patients who underwent hysterectomies due to the presence of uterine leiomyomas during a 6-year period (2009 and 2014) at Etlik Zubeyde Hanim Women’s Health Training and Research Hospital, Ankara, Turkey. Uterine leiomyoma was diagnosed based on histopathological examination of hysterectomy specimens. Demographic characteristics, and laboratory and histopathological findings were compared between patients with uterine leiomyoma with and without abnormal uterine bleeding. Results: In total, 501 (57.9%) patients had abnormal uterine bleeding and 364 (42.1%) patients had other symptoms. A history of cesarean section was more common in patients with abnormal uterine bleeding than in those with other symptoms (17.6% versus 9.3%, p=0.001; odds ratio [OR]: 2.1; 95% confidence interval [CI]: 1.4-3.3). The presence of a submucosal leiomyoma (OR: 2.1; 95% CI: 1.5-3.1) and coexistent adenomyosis (OR: 1.6; 95% CI: 1.1-2.4) were also associated with abnormal uterine bleeding. Conclusion: A history of cesarean section was an independent risk factor for abnormal uterine bleeding in patients with uterine leiomyomas; submucosal leiomyoma and coexisting adenomyosis were also independent risk factors.PubMedWoSScopu

Does lymph node ratio have any prognostic significance in maximally cytoreduced node-positive low-grade serous ovarian carcinoma?

Purpose To determine the prognostic impact of the lymph node ratio (LNR) in node-positive low-grade serous ovarian cancer (LGSOC). Methods We retrospectively reviewed women with LGSOC who had undergone maximal cytoreduction followed by standard chemotherapy in 11 centers from Turkey during a study period of 20 years. Sixty two women with node-positive LGSOC were identified. LNR was defined as the number of metastatic lymph nodes (LNs) divided by the number of total LNs removed. We grouped patients pursuant to the LNR as LNR 0.09. The prognostic value of LNR was investigated by employing the univariate log-rank test and multivariate Cox-regression model. Results With a median follow-up of 45 months, the 5-year progression-free survival (PFS) rates were 61.7% for women with LNR 0.09 (p = 0.046) whereas, the 5-year overall survival (OS) rates were 72.8% for LNR 0.09 (p = 0.043). On multivariate analyses, lymphovascular space invasion (LVSI) (Hazard Ratio [HR] 4.18, 95% confidence interval [CI] 1.88-9.27; p 0.09 (HR 3.51, 95% CI 1.54-8.03; p = 0.003) were adverse prognostic factors for PFS. Additionally, LVSI (HR 6.56, 95% CI 2.33-18.41; p 0.09 (HR 7.20, 95% CI 2.33-22.26; p = 0.001) were independent prognostic factors for decreased OS. Conclusion LNR > 0.09 seems to be an independent prognosticator for decreased survival outcomes in LGSOC patients who received maximal cytoreduction followed by standard adjuvant chemotherapy