Search
Filters
total: 48
Search results for: SLEEP APNEA, ECG, HRV, SNORING, LARYNX OSCILLATION
-
A multisensor detector of a sleep apnea for using at home
PublicationDiagnosis of obstructive sleep apnea usually involves polysomnographic analysis, which unfortunately requires overnight stay in a specialized clinic and is very uncomfortable for a patient. This paper describes the method and apparatus for recording a set of signals to detect sleep apnea. The device records the following signals simultaneously: three-channel ECG, respiratory functions, signals from the accelerometer, and snoring...
-
A detector of sleep disorders for using at home
PublicationObstructive sleep apnea usually requires all-ni ght examination in a specialized clinic, under the supervision of a medical staff. Because of those requirements it is an expensive and a non-widely utilized test. Moving the examination procedure to patients’ home with automatic analysis algorithms involved will decrease the costs and make it available for larger group of patients. The developed device allows all-night recordings...
-
HRV and BPV indices in differentiating OSA patients from healthy controls
Open Research DataThe various HRV and BPV indices computed for the purpose of the analyses described in the paper “Differentiating patients with obstructive sleep apnea from healthy controls based on heart rate–blood pressure coupling quantified by entropy-based indices” by P. Pilarczyk, G. Graff, J.M. Amigó, K. Tessmer, K. Narkiewicz, and B. Graff.
-
Sleep Apnea Detection by Means of Analyzing Electrocardiographic Signal
PublicationObstructive sleep apnea (OSA) is a condition of cyclic, periodic ob-struction (stenosis) of the upper respiratory tract. OSA could be associated with serious cardiovascular problems, such as hypertension, arrhythmias, hearth failure or peripheral vascular disease. Understanding the way of connection between OSA and cardiovascular diseases is important to choose proper treatment strategy. In this paper, we present a method for integrated...
-
The Analysis of Patients' Airflow with Respect to Early Detection of Sleep Apnea
PublicationThe paper discusses the analysis of the respiratory events of sleep apnea patients. The analysis was carried out on the basis of the patient's airflow. As a result of the conducted analysis we proposed an algorithm which establishes an individual respiratory pattern for each subject. The algorithm could be implemented in the measurement - control system which manages the prosthetic device applying positive airway pressure. Its...
-
Obstructive sleep apnea and hypertension
Publication -
Automated Detection of Sleep Apnea and Hypopnea Events Based on Robust Airflow Envelope Tracking in the Presence of Breathing Artifacts. - [IEEE JOURNAL OF BIOMEDICAL AND HEALTH INFORMATICS]
PublicationThe paper presents a new approach to detection of apnea/hypopnea events, in the presence of artifacts and breathing irregularities, from a single channel airflow record. The proposed algorithm, based on a robust envelope detector , identifies segments of signal affected by a high amplitude mo d- ulation corresponding to apnea/hypopnea events. It is show n that a robust airflow envelope - free of breathing artifacts - improves effectiveness...
-
Primary Aldosteronism and Obstructive Sleep Apnea
Publication -
Obstructive sleep apnea and heart rate asymmetry microstructure during sleep
Publication -
The sympathetic nervous system and obstructive sleep apnea
Publication -
Altered Cardiovascular Variability in Obstructive Sleep Apnea
Publication -
Obstructive sleep apnea as a cause of neurogenic hypertension
Publication -
Cardiovascular variability characteristics in obstructive sleep apnea
Publication -
Effects of Renal Sympathetic Denervation on Blood Pressure, Sleep Apnea Course, and Glycemic Control in Patients With Resistant Hypertension and Sleep Apnea
Publication -
Differentiating patients with obstructive sleep apnea from healthy controls based on heart rate-blood pressure coupling quantified by entropy-based indices
PublicationWe introduce an entropy-based classification method for pairs of sequences (ECPS) for quantifying mutual dependencies in heart rate and beat-to-beat blood pressure recordings. The purpose of the method is to build a classifier for data in which each item consists of two intertwined data series taken for each subject. The method is based on ordinal patterns and uses entropy-like indices. Machine learning is used to select a subset...
-
Renal Denervation in Resistant Hypertension and Obstructive Sleep Apnea
Publication -
Managing comorbid cardiovascular disease and sleep apnea with pharmacotherapy
Publication -
Sleep apnea: epidemiology, pathophysiology, and relation to cardiovascular risk
Publication -
Update on Hypertension Management: Obstructive sleep apnea and hypertension
Publication -
Obstructive sleep apnea: An update on mechanisms and cardiovascular consequences
Publication -
Moderate-to-severe obstructive sleep apnea is associated with telomere lengthening
Publication -
Sympathetic Activity in Obese Subjects With and Without Obstructive Sleep Apnea
Publication -
Position paper on the management of patients with obstructive sleep apnea and hypertension
Publication -
Effects of obstructive sleep apnea on endothelin-1 and blood pressure
Publication -
Non-dipping pattern of hypertension and obstructive sleep apnea syndrome
Publication -
Selective Potentiation of Peripheral Chemoreflex Sensitivity in Obstructive Sleep Apnea
Publication -
Cardiovascular Function in Obstructive Sleep Apnea Patients with Controlled Hypertension
Publication -
Recent weight gain in patients with newly diagnosed obstructive sleep apnea
Publication -
Obesity, Bariatric Surgery and Obstructive Sleep Apnea—A Narrative Literature Review
Publication -
Emotional enhancement of memory effect in obstructive sleep apnea syndrome - preliminary results
Publication -
Baroreflex Control of Sympathetic Nerve Activity and Heart Rate in Obstructive Sleep Apnea
Publication -
Increases in leptin levels, sympathetic drive, and weight gain in obstructive sleep apnea
Publication -
Patients with obstructive sleep apnea present with chronic upregulation of serum HIF-1α protein
Publication -
A response to “Cardiovascular disease and obstructive sleep apnea: an underappreciated role for increased platelet activity?”
Publication -
Serum of obstructive sleep apnea patients impairs human coronary endothelial cell migration
Publication -
Obstructive sleep apnea and intermittent hypoxia increase expression of dual specificity phosphatase 1
Publication -
Automated detection of sleep apnea and hypopnea events based on robust airflow envelope tracking
PublicationThe paper presents a new approach to detection of apnea/hypopnea events, in the presence of artifacts and breathing irregularities, from a single-channel airflow record. The proposed algorithm identifies segments of signal affected by a high amplitude modulation corresponding to apnea/hypopnea events. It is shown that a robust airflow envelope—free of breathing artifacts—improves effectiveness of the diagnostic process and allows...
-
Parasomnias and obstructive sleep apnea syndrome: in search for a parasomnia evaluating tool appropriate for OSAS screening
Publication -
Renal artery denervation for treatment of patients with self-reported obstructive sleep apnea and resistant hypertension
Publication -
Telomere Length and Risk of Major Adverse Cardiac Events and Cancer in Obstructive Sleep Apnea Patients
Publication -
Contribution of Tonic Chemoreflex Activation to Sympathetic Activity and Blood Pressure in Patients With Obstructive Sleep Apnea
Publication -
Nocturnal Continuous Positive Airway Pressure Decreases Daytime Sympathetic Traffic in Obstructive Sleep Apnea
Publication -
Effect of beta-blocker therapy on heart rate response in patients with hypertension and newly diagnosed untreated obstructive sleep apnea syndrome
Publication -
A telemedical and an outpatient thoracic impedance measurements - a validation algorithm of the electrodes placement
PublicationThis paper presents the algorithm for validation of electrodes locations for the thoracic impedance measurements. In particular the presented algorithm was designed to perform the telemetric sleep apnea monitoring. One of the problems, during the clinical tests of a developed device, was to preserve the repeatability of measurements. It strongly depended on the appropriate electrodes placement on the examined person’s thorax. It...
-
Cross-talk Between the Heart and Arteries in Older 65+ Adults
PublicationRegulatory synchronization between the heart and the arterial walls is essential for optimal blood delivery to tissues. We investigated functional coherence between heart rhythm and aortic wall compliance in 30 volunteers aged 65 – 74. ECG and carotid and iliac pulse-wave were recorded and digitized at 2 kHz. Carotid-femoral pulse-wave transit time (cfTT) which reflex aortic compliance was assessed using the intersecting tangent...
-
Cross-validation for triplets of HRV and BPV indices based on ordinal patterns in differentiating OSA patients from healthy controls
Open Research DataResults of cross-validation for triplets of HRV and BPV indices based on ordinal patterns, as described in the paper “Differentiating patients with obstructive sleep apnea from healthy controls based on heart rate–blood pressure coupling quantified by entropy-based indices” by P. Pilarczyk, G. Graff, J.M. Amigó, K. Tessmer, K. Narkiewicz, B. Graff.
-
Cross-validation for triplets of classical HRV and BPV indices in differentiating OSA patients from healthy controls
Open Research DataResults of cross-validation for triplets of classical HRV and BPV indices, as described in the paper “Differentiating patients with obstructive sleep apnea from healthy controls based on heart rate–blood pressure coupling quantified by entropy-based indices” by P. Pilarczyk, G. Graff, J.M. Amigó, K. Tessmer, K. Narkiewicz, and B. Graff.
-
Entropy Measures in the Assessment of Heart Rate Variability in Patients with Cardiodepressive Vasovagal Syncope
PublicationSample entropy (SampEn) was reported to be useful in the assessment of the complexity of heart rate dynamics. Permutation entropy (PermEn) is a new measure based on the concept of order and was previously shown to be accurate for short, non-stationary datasets. The aim of the present study is to assess if SampEn and PermEn obtained from baseline recordings might differentiate patients with various outcomes of the head-up tilt test...