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electrocardiography sleep apnea

Sabri Seyis, Adnan Kazım Usalan, Ibrahim Rencuzogullari, Özge Kurmuş, Adil Can Gungen
Background: We aimed to investigate the effects of continuous positive airway pressure (CPAP) treatment on electrocardiography (ECG), premature ventricular contraction load on 24-hour Holter recordings, and implantable cardioverter defibrillator (ICD) shocks in patients with obstructive sleep apnea syndrome (OSAS) and heart failure. Methods: Patients with heart failure and ICD and patients with newly diagnosed OSAS were divided into two groups according to CPAP treatment...
2018: Canadian Respiratory Journal: Journal of the Canadian Thoracic Society
Daniel Vena, T Douglas Bradley, Philip J Millar, John S Floras, Jonathan Rubianto, Bojan Gavrilovic, Elisa Perger, Azadeh Yadollahi
STUDY OBJECTIVES: Postoperative development of obstructive sleep apnea (OSA) has been attributed to the fluid overloaded state of patients during the postoperative period. In this context, alterations in cardiac autonomic regulation caused by OSA may explain the increased postoperative risk for adverse cardiovascular events. This study tests the hypothesis that individuals with fluid overload-induced OSA will experience autonomic dysregulation, compared to those without fluid overload-induced OSA...
April 15, 2018: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
Glaucylara Reis Geovanini, Rui Wang, Jia Weng, Russell Tracy, Nancy S Jenny, Ary L Goldberger, Madalena D Costa, Yongmei Liu, Peter Libby, Susan Redline
BACKGROUND: Obstructive sleep apnea (OSA) associates with increased risk of cardiovascular diseases (CVD). Immune abnormalities and surges in sympathetic activity accompany OSA and CVD. We hypothesized that OSA associates with leukocytosis partially by abnormalities in autonomic nervous system (ANS) function that would suggest a pathway linking OSA and CVD. METHODS: Participants from the Multi-Ethnic Study of Atherosclerosis (MESA), a prospective cohort of individuals initially without overt CVD, underwent polysomnography and assays for white blood cells (WBC) and subsets...
April 15, 2018: International Journal of Cardiology
Christina Schmidleitner, Michael Arzt, Maria Tafelmeier, Sarah Ripfel, Miriam Fauser, Teresa Weizenegger, Bernhard Flörchinger, Daniele Camboni, Sigrid Wittmann, Florian Zeman, Christof Schmid, Lars S Maier, Stefan Wagner, Christoph Fisser
BACKGROUND: The development of malignant ventricular arrhythmias due to abnormal cardiac repolarization is a major complication after coronary artery bypass graft surgery (CABG). Sleep-disordered breathing (SDB) is linked to prolonged cardiac repolarization in non-surgical patients. This study evaluates cardiac repolarization in patients with and without SDB who underwent CABG. METHODS: 100 patients who had received CABG (84% men, age 68 ± 10 years, body-mass-index [BMI] 28...
February 2018: Sleep Medicine
Jiayong Xie, Wenjuan Yu, Zongren Wan, Fei Han, Qiaojun Wang, Rui Chen
Background: Heart rate variability (HRV) represents the sympathetic nervous system activity induced by apnea or hypopnea events among OSAS patients. However, few studies have been conducted to clarify the association between HRV parameters and polysomnography (PSG) diagnostic indices. In our study, we postulate that the prevalence of cardiac arrhythmias is associated with OSAS, and HRV parameters may be an effective method for OSAS screening. Methods: Overall, 168 participants had been collected from 2011 to 2016 in the Second Affiliated Hospital of Soochow University...
November 2017: Iranian Journal of Public Health
Christoph Fisser, Alina Marcinek, Andrea Hetzenecker, Kurt Debl, Andreas Luchner, Ulrich Sterz, Jörg Priefert, Florian Zeman, Malcolm Kohler, Lars S Maier, Stefan Buchner, Michael Arzt
OBJECTIVE: In patients with ST-segment elevation myocardial infarction (STEMI), disturbed cardiac repolarization before percutaneous coronary intervention (PCI) is a risk factor for malignant ventricular arrhythmia. We tested the hypothesis that sleep-disordered breathing (SDB) in patients with STEMI is associated with disturbed cardiac repolarization. METHODS: Thirty-three patients with STEMI who underwent PCI were prospectively enrolled. To assess cardiac repolarization, the heart-rate corrected interval from the peak of the T wave to the end of the T wave (TpTec) and QTc intervals were assessed with 12-lead electrocardiography before PCI, within 24 h after PCI, and 12 weeks after PCI...
May 2017: Sleep Medicine
Ching Li Chai-Coetzer, Nick A Antic, Garun S Hamilton, Nigel McArdle, Keith Wong, Brendon J Yee, Aeneas Yeo, Rajeev Ratnavadivel, Matthew T Naughton, Teanau Roebuck, Richard Woodman, R Doug McEvoy
Background: The clinical utility of limited-channel sleep studies (which are increasingly conducted at home) versus laboratory polysomnography (PSG) for diagnosing obstructive sleep apnea (OSA) is unclear. Objective: To compare patient outcomes after PSG versus limited-channel studies. Design: Multicenter, randomized, noninferiority study. (Australian New Zealand Clinical Trials Registry: ACTRN12611000926932). Setting: 7 academic sleep centers...
March 7, 2017: Annals of Internal Medicine
Jie Jiang, Xue Chen, Cheng Zhang, Guangfa Wang, Jing Fang, Jing Ma, Jue Zhang
PURPOSE: This study aimed to explore the patterns of heart rate acceleration runs and deceleration runs in patients with obstructive sleep apnea syndrome and to investigate the influence of apnea events on this pattern. METHODS: The 6-h electrocardiography results of patients who were referred for overnight polysomnography were retrospectively analyzed. The frequencies of heart rate acceleration runs and deceleration runs of different lengths were calculated for each patient and compared among patients with obstructive sleep apnea syndrome of varying degrees of severity, between patients with obstructive sleep apnea on and off continuous positive airway pressure, and between two matched groups of patients with idiopathic central sleep apnea and obstructive sleep apnea...
May 2017: Sleep & Breathing, Schlaf & Atmung
Carmen Pizarro, Fabian van Essen, Fabian Linnhoff, Robert Schueler, Christoph Hammerstingl, Georg Nickenig, Dirk Skowasch, Marcel Weber
BACKGROUND: COPD and congestive heart failure represent two disease entities of growing global burden that share common etiological features. Therefore, we aimed to identify the degree of left ventricular (LV) dysfunction in COPD as a function of COPD severity stages and concurrently placed particular emphasis on the presence of overlapping obstructive sleep apnea (OSA). METHODS: A total of 85 COPD outpatients (64.1±10.4 years, 54.1% males) and 20 controls, matched for age, sex, and smoking habits, underwent speckle tracking echocardiography for LV longitudinal strain imaging...
2016: International Journal of Chronic Obstructive Pulmonary Disease
Tsogyal Daniela Latshang, Barbara Kaufmann, Yvonne Nussbaumer-Ochsner, Silvia Ulrich, Michael Furian, Malcolm Kohler, Robert Thurnheer, Ardan Muammer Saguner, Firat Duru, Konrad Ernst Bloch
STUDY OBJECTIVES: Obstructive sleep apnea (OSA) promotes myocardial electrical instability and may predispose to nocturnal sudden cardiac death. We evaluated whether hypobaric hypoxia during altitude travel further impairs cardiac repolarization in patients with OSA, and whether this is prevented by acetazolamide, a drug known to improve oxygenation and central sleep apnea at altitude. METHODS: Thirty-nine OSA patients living < 600 m, discontinued continuous positive airway pressure therapy during studies at 490 m and during two sojourns of 3 days at altitude (2 days at 1860 m, 1 day at 2590 m)...
September 1, 2016: Sleep
Xuehao Gong, Leidan Huang, Xin Liu, Chunyue Li, Xuhua Mao, Weizong Liu, Xian Huang, Haiting Chu, Yumei Wang, Wanqing Wu, Jun Lu
Heart rate variability (HRV) can reflect the changes in the autonomic nervous system (ANS) that are affected by apnea or hypopnea events among patients with obstructive sleep apnea hypopnea syndrome (OSAHS). To evaluate the possibility of using HRV to screen for OSAHS, we investigated the relationship between HRV and polysomnography (PSG) diagnostic indices using electrocardiography (ECG) and PSG data from 25 patients with OSAHS and 27 healthy participants. We evaluated the relationship between various PSG diagnostic indices (including the apnea hypopnea index [AHI], micro-arousal index [MI], oxygen desaturation index [ODI]) and heart rate variability (HRV) parameters using Spearman's correlation analysis...
2016: PloS One
Flávia B Nerbass, Vera M C Salemi, Rodrigo P Pedrosa, Natanael de P Portilho, Julio C A Ferreira-Filho, Henrique T Moriya, Murillo O Antunes, Edmundo Arteaga-Fernández, Luciano F Drager, Geraldo Lorenzi-Filho
BACKGROUND: Hypertrophic cardiomyopathy (HCM) is a common genetic disease that may cause left ventricular outflow tract (LVOT) obstruction, heart failure, and sudden death. Recent studies have shown a high prevalence of OSA among patients with HCM. Because the hemodynamics in patients with LVOT obstruction are unstable and depend on the loading conditions of the heart, we evaluated the acute effects of CPAP on hemodynamics and cardiac performance in patients with HCM. METHODS: We studied 26 stable patients with HCM divided into nonobstructive HCM (n = 12) and obstructive HCM (n = 14) groups (LVOT gradient pressure lower or higher than 30 mm Hg, respectively)...
November 2016: Chest
Thomas Gaisl, Annette M Wons, Valentina Rossi, Daniel J Bratton, Christian Schlatzer, Esther I Schwarz, Giovanni Camen, Malcolm Kohler
BACKGROUND: A high P-wave duration and dispersion (Pd) have been reported to be a prognostic factor for the occurrence of paroxysmal atrial fibrillation (PAF), a condition linked to obstructive sleep apnea (OSA). We tested the hypothesis of whether a short-term increase of P-wave duration and Pd can be induced by respiratory manoeuvres simulating OSA in healthy subjects and in patients with PAF. METHODS: 12-lead-electrocardiography (ECG) was recorded continuously in 24 healthy subjects and 33 patients with PAF, while simulating obstructive apnea (Mueller manoeuvre, MM), obstructive hypopnea (inspiration through a threshold load, ITH), central apnea (AP), and during normal breathing (BL) in randomized order...
2016: PloS One
Ren-Jing Huang, Ching-Hsiang Lai, Shin-Da Lee, Wei-Che Wang, Ling-Hui Tseng, Yu-Pin Chen, Shen-Wen Chang, Ai-Hui Chung, Hua Ting
PURPOSE: To assess the physiological meanings of the detrended fluctuation analysis (DFA) slope α and its relationship to spectral measures in heart rate variability, this study investigated changes of α and its corresponding spectral measures over various night-sleep stages. METHODS: The overall DFA α and natural-logarithm-transformed power values of the spectral parameters ln[high-frequency (HF)], ln[low-frequency (LF)], and ln[very-low-frequency (VLF)], and their relationship from one 5-min proper electrocardiography segment in each of pre-sleep-wakefulness (AWK), non-rapid eye movement stage 2 (N2), slow-wave (N3), the first and the latest rapid-eye movement sleep (REM1, and REM2), were computed in 93 otherwise healthy males (44...
September 2016: Sleep & Breathing, Schlaf & Atmung
Younghoon Kwon, Katherine Picel, Selcuk Adabag, Tien Vo, Brent C Taylor, Susan Redline, Katie Stone, Reena Mehra, Sonia Ancoli-Israel, Kristine E Ensrud
PURPOSE: Nocturnal cardiac conduction abnormalities are commonly observed in patients with sleep-disordered breathing (SDB). However, few population-based studies have examined the association between SDB and daytime cardiac conduction abnormalities. METHODS: We examined a random sample of 471 community-dwelling men, aged ≥67 years, enrolled in the multi-center Outcomes of Sleep Disorders in Older Men (MrOS Sleep) study. SDB severity was categorized using percent of total sleep time with oxygen saturation <90 % (%TST < 90) and apnea hypopnea index (AHI)...
December 2016: Sleep & Breathing, Schlaf & Atmung
Muntecep Asker, Selvi Asker
BACKGROUND AND AIM OF THE STUDY: It was hypothesized that sleep disorders might be present due to functional heart failure in patients with mitral stenosis (MS), and might be accompanied by obstructive-type sleep disorders. To examine this hypothesis, non-smoker and non-obese patients with rheumatic MS and without concomitant diseases were investigated for sleep disorders. METHODS: Patients admitted to the cardiology outpatient clinic at the authors' institution for rheumatic MS during a one-year period were included in the study...
May 2015: Journal of Heart Valve Disease
Shicheng Su, Ning Ding, Xianji Zhu, Xilong Zhang, Rongbin Yu
OBJECTIVE: To evaluate the occurrence and clinical characteristics of sleep apnea syndrome (SAS) in heart failure (HF) patients with atrial fibrillation (AF). METHODS: From HF patients hospitalized in the First Affiliated Hospital of Nanjing Medical University during June 2012 and June 2014, subjects were recruited based on electrocardiography examination, including 110 patients with AF (coexisting AF group) and 105 parallel control patients without AF but with matched age, gender and body mass index (simple HF group)...
October 2015: Zhonghua Yi Xue za Zhi [Chinese medical journal]
Ruth Sanchez-Ortiga, Vicente Climent, Laura Sanchez-Tejada, Alfredo Candela, Antonio Pico
OBJECTIVE: To assess whether sleep apnea-hypopnea syndrome (SAHS) is a risk factor for development of acromegalic cardiomyopathy. METHODS: A descriptive, cross-sectional study of 32 patients with acromegaly (15 categorized as non-controlled-NCA and 17 as controlled-CA) compared to 20 matched controls (by sex, age, and BMI) referred to the pulmonology department for suspected SAHS. Polysomnography, echocardiography (M-mode, 2-dimensional, and Doppler), and 12-lead electrocardiography were performed in all participants...
October 2015: Endocrinología y Nutrición: órgano de la Sociedad Española de Endocrinología y Nutrición
Abu S Shamsuzzaman, Virend K Somers, Timothy K Knilans, Michael J Ackerman, Yu Wang, Raouf S Amin
BACKGROUND: Congenital long QT syndrome (LQTS) is a familial arrhythmogenic cardiac channelopathy characterized by prolonged ventricular repolarization and increased risk of torsades de pointes-mediated syncope, seizures, and sudden cardiac death (SCD). QT prolongation corrected for heart rate (QTc) is an important diagnostic and prognostic feature in LQTS. Obstructive sleep apnea (OSA) has been increasingly implicated in the pathogenesis of cardiovascular disease, including arrhythmias and SCD...
July 1, 2015: Sleep
Adem Adar, Abdulkadir Kırış, Yılmaz Bülbül, Hüseyin Bektaş, Murat Acat, Hasan Casim, Orhan Onalan
OBJECTIVE: We aimed to investigate whether fragmented QRS (fQRS) is associated with subclinical left ventricular (LV) dysfunction in patients with obstructive sleep apnea (OSA). SUBJECTS AND METHODS: A total of 141 patients with OSA who had normal LV ejection fraction (LVEF) were included in the study. The fQRS was defined as the presence of an additional R wave, notching of R or S wave or the presence of fragmentation in 2 contiguous electrocardiography (ECG) leads...
2015: Medical Principles and Practice: International Journal of the Kuwait University, Health Science Centre
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