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https://www.readbyqxmd.com/read/28641244/computerized-lung-sound-screening-for-pediatric-auscultation-in-noisy-field-environments
#1
Dimitra Emmanouilidou, Eric D McCollum, Daniel E Park, Mounya Elhilali
GOAL: Chest auscultations offer a non-invasive and low-cost tool for monitoring lung disease. However, they present many shortcomings including inter-listener variability, subjectivity, and vulnerability to noise and distortions. The current work proposes a computer-aided approach to process lung signals acquired in the field under adverse noisy conditions, by improving the signal quality and offering automated iden- tification of abnormal auscultations indicative of respiratory pathologies...
June 19, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28635904/-myocardial-fibrosis-current-aspects-of-the-problem
#2
V N Karetnikova, V V Kashtalap, S N Kosareva, O L Barbarash
Fibrosis is one of the main components in the progression of most cardiovascular diseases, including coronary heart disease, by causing structural changes in the myocardium and vascular wall. The quantitative and qualitative characteristics of fibrosis of the myocardium are responsible for decreasing its elastic properties, developing diastolic dysfunction, impairing myocardial contractility, developing systolic dysfunction and cardiac arrhythmias, and worsening coronary blood flow in patients with heart failure of different etiologies...
2017: Terapevticheskiĭ Arkhiv
https://www.readbyqxmd.com/read/28615157/designing-prototyping-and-evaluating-digital-mindfulness-applications-a-case-study-of-mindful-breathing-for-stress-reduction
#3
Bin Zhu, Anders Hedman, Shuo Feng, Haibo Li, Walter Osika
BACKGROUND: During the past decade, there has been a rapid increase of interactive apps designed for health and well-being. Yet, little research has been published on developing frameworks for design and evaluation of digital mindfulness facilitating technologies. Moreover, many existing digital mindfulness applications are purely software based. There is room for further exploration and assessment of designs that make more use of physical qualities of artifacts. OBJECTIVE: The study aimed to develop and test a new physical digital mindfulness prototype designed for stress reduction...
June 14, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28613208/ensemble-methods-with-outliers-for-phonocardiogram-classification
#4
Masun Nabhan Homsi, Philip Warrick
Heart sound classification and analysis play an important role in early diagnosis and prevention of cardiovascular disease. To this end, this paper introduces a novel method for automatic classification of normal and abnormal heart sound recordings. Signals are first preprocessed to extract a total of 131 features in time, frequency, wavelet and statistical domains from the entire signal and from the timings of the states. Outlier signals are then detected and separated from those with a standard range using interquartile range algorithm...
June 14, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28611139/unrecognised-diaphragmatic-hernia-in-a-refugee-child-an-incidental-diagnosis
#5
Dimitri Poddighe, Tiziana Boggini, Salvatore Savasta, Gian Luigi Marseglia
A 4-year-old boy from Syria was evaluated at the emergency department because of an upper airway viral illness. His physical examination showed a significant intensity reduction of all heart sounds in the absence of any other pathological signs. As the child was affected with Down's syndrome and had suffered thoracic and abdominal trauma because of bombardments, a diaphragmatic hernia was immediately suspected and was confirmed through a simple chest X-ray. A careful clinical examination is crucial in refugee children and adolescents, as several medical and surgical disorders could have escaped previously...
June 13, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28604999/percutaneous-cardiac-support-during-myocardial-infarction-drastically-reduces-mortality-perspectives-from-a-swine-model
#6
Maria Giovanna Trivella, Alessandra Piersigilli, Fabio Bernini, Gualtiero Pelosi, Silvia Burchielli, Stefano Puzzuoli, Claudia Kusmic, Antonio L'Abbate
BACKGROUND/AIMS: Acute myocardial infarction (AMI) with cardiogenic shock (CS) remains the leading cause of in-hospital death in acute coronary syndromes. In the AMI-CS pig model we tested the efficacy of temporary percutaneous cardiorespiratory assist device (PCRA) in rescuing the failing heart and reducing early mortality. METHODS: In open-chest pigs we induced AMI by proximal left anterior descending coronary artery (LAD) ligation. Eight animals without PCRA (C group) were compared with 12 animals otherwise treated with PCRA (T group), starting approximately at 60 minutes post-occlusion and lasting 120-180 minutes...
June 6, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28596461/classification-of-pulmonary-pathology-from-breath-sounds-using-the-wavelet-packet-transform-and-an-extreme-learning-machine
#7
Rajkumar Palaniappan, Kenneth Sundaraj, Sebastian Sundaraj, N Huliraj, S S Revadi
BACKGROUND: Auscultation is a medical procedure used for the initial diagnosis and assessment of lung and heart diseases. From this perspective, we propose assessing the performance of the extreme learning machine (ELM) classifiers for the diagnosis of pulmonary pathology using breath sounds. METHODS: Energy and entropy features were extracted from the breath sound using the wavelet packet transform. The statistical significance of the extracted features was evaluated by one-way analysis of variance (ANOVA)...
June 8, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28594641/detection-of-pathological-heart-sounds
#8
Mostafa Abdollahpur, Ali Ghaffari, Shadi Ghiasi, Mohammad Javad Mollakazemi
Heart sound analysis has been a major topic of research during the past few decades. However, necessity for a large reliable and database has been a major concern in these studies. Noting that the current heart sound classification methods do not work properly for noisy signals, the PhysioNet/CinC Challenge 2016 aims at developing the heart sound classification algorithms by providing a global open database for challengers. This paper addresses the problem of heart sound classification methods within noisy real-world phonocardiogram (PCG) recordings by implementing an innovative approach...
June 8, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28594638/recognition-of-normal-abnormal-phonocardiographic-signals-using-deep-convolutional-neural-networks-and-mel-frequency-spectral-coefficients
#9
Vykintas Maknickas, Algirdas Maknickas
Intensive care unit patients are heavily monitored, and several clinically relevant parameters are routinely extracted from high resolution signals. The goal of the 2016 PhysioNet/CinC Challenge was to encourage the creation of an intelligent system that fused information from different phonocardiographic signals to create a robust set of normal/abnormal signal detections. Methods: Deep convolutional neural networks and mel-frequency spectral coefficients were used for recognition of normal-abnormal phonocardiographic signals of the human heart...
June 8, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28587528/a-prospective-observational-cohort-study-of-exposure-to-womb-like-sounds-to-stabilize-breathing-and-cardiovascular-patterns-in-preterm-neonates
#10
Joanna J Parga, Ravi R Bhatt, Kalpashri Kesavan, Myung-Shin Sim, Harvey N Karp, Ronald M Harper, Lonnie Zeltzer
PURPOSE: We exposed premature infants to womb-like sounds to evaluate such exposure on breathing and cardiovascular patterns. We hypothesized that these sounds would reduce apnea and intermittent hypoxemia, enhance parasympathetic outflow, and improve cardiovascular patterns. METHODS: A total of 20 cases and 5 control infants at ≤ 32-36 weeks corrected gestational age participated in a prospective observational cohort study. Twenty-four hours of continuous ECG, respiratory and oxygen saturation data were collected in all infants...
June 7, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28583532/prediction-of-fluid-responsiveness-by-a-non-invasive-respiratory-systolic-time-interval-variation-using-heart-sound-signals-in-recipients-undergoing-liver-transplantation
#11
S-H Kim, Y-J Moon, J-W Kim, J-G Song, G-S Hwang
BACKGROUND: The fluid management of cirrhotic patients undergoing liver transplantation (LT) is challenging. Phonocardiography, a graphic recording of heart sounds, provides valuable information concerning heart function and hemodynamic condition. We assessed whether the systolic time interval (STI) and its respiratory variation could predict fluid responsiveness in cirrhotic patients undergoing LT. METHODS: Thirty LT recipients who needed volume expansion were included...
June 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28582985/septic-pericarditis-and-pneumopericardium-in-a-dog-with-an-oesophageal-foreign-body
#12
Willem J Botha, Varaidzo Mukorera, Robert M Kirberger
A 5-year-old, intact, male Yorkshire Terrier presented with a 6-day history of lethargy and anorexia. Clinical examination revealed dental plaque accumulation, abdominal effort during respiration and muffled heart sounds. Thoracic radiographs revealed an enlarged globoid cardiac silhouette and mild pneumopericardium, transthoracic ultrasonography revealed a pericardial effusion after which pericardiocentesis, cytology and culture diagnosed septic pericarditis. Three multidrug-resistant bacteria were isolated, two of which have been implicated in gas-producing infections before...
May 29, 2017: Journal of the South African Veterinary Association
https://www.readbyqxmd.com/read/28580706/mr-techniques-for-guiding-high-intensity-focused-ultrasound-hifu-treatments
#13
REVIEW
Kagayaki Kuroda
To make full use of the ability of magnetic resonance (MR) to guide high-intensity focused ultrasound (HIFU) treatment, effort has been made to improve techniques for thermometry, motion tracking, and sound beam visualization. For monitoring rapid temperature elevation with proton resonance frequency (PRF) shift, data acquisition and processing can be accelerated with parallel imaging and/or sparse sampling in conjunction with appropriate signal processing methods. Thermometry should be robust against tissue motion, motion-induced magnetic field variation, and susceptibility change...
June 5, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28575422/fatalities-involving-carfentanil-and-furanyl-fentanyl-two-case-reports
#14
Dina M Swanson, Laura S Hair, Selly R Strauch Rivers, Brianna C Smyth, Sara C Brogan, Alexis D Ventoso, Samantha L Vaccaro, Julia M Pearson
Carfentanil is a fentanyl analog frequently used in large animal veterinary medicine. Recently, carfentanil has been discovered in postmortem and antemortem cases throughout the United States in the heroin supply either alone or mixed with heroin and/or other fentanyl analogs. The potency of carfentanil is ~10,000 times greater than morphine and 100 times greater than fentanyl. In two recent cases, carfentanil was identified and ruled to be the cause of death, either alone or in combination with other drugs...
May 31, 2017: Journal of Analytical Toxicology
https://www.readbyqxmd.com/read/28570832/spearcons-for-patient-monitoring-laboratory-investigation-comparing-earcons-and-spearcons
#15
Simon Y W Li, Tsz-Lok Tang, Anna Hickling, Szeyuen Yau, Birgit Brecknell, Penelope M Sanderson
Objective We compared the effectiveness of single-tone earcons versus spearcons in conveying information about two commonly monitored vital signs: oxygen saturation and heart rate. Background The uninformative nature of many medical alarms-and clinicians' lack of response to alarms-is a widespread problem that can compromise patient safety. Auditory displays, such as earcons and spearcons (speech-based earcons), may help clinicians maintain awareness of patients' well-being and reduce their reliance on alarms...
May 1, 2017: Human Factors
https://www.readbyqxmd.com/read/28562369/combining-sparse-coding-and-time-domain-features-for-heart-sound-classification
#16
Bradley M Whitaker, Pradyumna Byappanahalli Suresha, Chengyu Liu, Gari Clifford, David Anderson
This paper builds upon work submitted as part of the 2016 PhysioNet/CinC Challenge, which used sparse coding as a feature extraction tool on audio PCG data for heart sound classification. In sparse coding, preprocessed data is decomposed into a dictionary matrix and a sparse coefficient matrix. The dictionary matrix represents statistically important features of the audio segments. The sparse coefficient matrix is a mapping that represents which features are used by each segment. Working in the sparse domain, we train support vector machines (SVMs) for each audio segment (S1, systole, S2, diastole) and a full cardiac cycle...
May 31, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28562368/heart-sounds-analysis-using-probability-assessment
#17
Filip Plesinger, Ivo Viscor, Josef Halamek, Juraj Jurco, Pavel Jurak
This paper describes a method for automated discrimination of heart sounds recordings according to the Physionet Challenge 2016. The goal was to decide if the recording refers to normal or abnormal heart sounds or if it is not possible to decide (i.e. "unsure" recordings). Approach: Heart sounds S1 and S2 are detected using amplitude envelopes in the band 15-90 Hz. The averaged shape of the S1/S2 pair is computed from amplitude envelopes in five different bands (15-90 Hz; 55-150 Hz; 100-250 Hz; 200-450 Hz; 400-800 Hz)...
May 31, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28539541/sleep-disordered-breathing-in-heart-failure%C3%A3-a-therapeutic-dilemma
#18
Nobuhiko Haruki, John S Floras
Sleep-disordered breathing (SDB) occurs in approximately 50% of patients with reduced left ventricular ejection fraction receiving contemporary heart failure (HF) therapies. Obstructive (OSA) and central sleep apneas (CSA) interrupt breathing by different mechanisms but impose qualitatively similar autonomic, chemical, mechanical, and inflammatory burdens on the heart and circulation. Because contemporary evidence-based drug and device HF therapies have little or no mitigating effect on the acute or long-term consequences of such stimuli, there is a sound mechanistic rationale for targeting SDB to reduce cardiovascular event rates and prolong life...
May 23, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28538301/proposal-of-a-new-specific-cardiopulmonary-exercise-test-for-taekwondo-athletes
#19
Marcus P Araujo, Antônio C L Nóbrega, Gabriel Espinosa, Matheus R Hausen, Renata R T Castro, Pedro P Soares, Jonas L Gurgel
The objective of this study is to evaluate the cardiorespiratory variables of Taekwondo athletes while performing incremental exercise test on an ergometer using a ramp protocol and to propose a specific protocol for assessing these physiological variables during Taekwondo practice. Fourteen athletes participated in 2 incremental exercise tests: a treadmill exercise test (TREADtest) and a Taekwondo-specific exercise test (TKDtest). The TKDtest consists in 1-minute stages of kicks with an incremental load between then...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28534468/effect-of-wearing-a-telemetry-jacket-on-behavioral-and-physiologic-parameters-of-dogs-in-the-open%C3%A2-field-test
#20
Richard E Fish, Melanie L Foster, Margaret E Gruen, Barbara L Sherman, David C Dorman
Safety pharmacology studies in dogs often integrate behavioral assessments made using video recording with physiologicmeasurements collected by telemetry. However, whether merely wearing the telemetry vest affects canine behavior and otherparameters has not been evaluated. This pilot study assessed the effect of a telemetry vest on behavioral and physiologic responses to an environmental stressor, the sounds of a thunderstorm, in Labrador retrievers. Dogs were assigned to one of 2 experimental groups (Vest and No-Vest, n = 8 dogs per group) by using a matched pairs design, with a previously determined,sound-associated anxiety score as the blocking variable...
May 22, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
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