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https://www.readbyqxmd.com/read/27904536/a-review-on-human-respiratory-modeling
#1
REVIEW
Pardis Ghafarian, Hamidreza Jamaati, Seyed Mohammadreza Hashemian
Input impedance of the respiratory system is measured by forced oscillation technique (FOT). Multiple prior studies have attempted to match the electromechanical models of the respiratory system to impedance data. Since the mechanical behavior of airways and the respiratory system as a whole are similar to an electrical circuit in a combination of series and parallel formats some theories were introduced according to this issue. It should be noted that, the number of elements used in these models might be less than those required due to the complexity of the pulmonary-chest wall anatomy...
2016: Tanaffos
https://www.readbyqxmd.com/read/27888758/left-atrium-and-pulmonary-vein-imaging-using-sub-millisiviert-cardiac-computed-tomography-impact-on-radiofrequency-catheter-ablation-cumulative-radiation-exposure-and-outcome-in-atrial-fibrillation-patients
#2
Gianluca Pontone, Daniele Andreini, Maria Petulla, Andrea Annoni, Andrea I Guaricci, Ester Innocenti, Eleonora Russo, Marco Guglielmo, Saima Mushtaq, Andrea Baggiano, Virginia Beltrama, Laura Fusini, Chiara Segurini, Edoardo Conte, Alberto Formenti, Gaetano Fassini, Stefania Riva, Claudio Tondo, Piergiuseppe Agostoni, Antonio L Bartorelli, Mauro Pepi
BACKGROUND: The outcome of radiofrequency catheter ablation (RFCA) of atrial fibrillation (AF) has improved thanks to left atrium (LA) anatomy reconstruction by cardiac computed tomography (CCT). A new model-based iterative reconstruction algorithm (MBIR) provides image noise reduction achieving effective radiation dose (ED) close to chest X-ray exposure. Aim of this study was comparing RFCA procedural characteristics, AF recurrence and radiation exposure between patients in whom RFCA was guided by CCT image integration with MBIR versus a CCT standard protocol...
November 9, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27884419/a-novel-deep-inspiration-maneuver-for-difficult-transseptal-puncture
#3
Tolga Aksu, Tumer Erdem Guler, Kivanc Yalin, Sukriye Ebru Golcuk, Kazim Serhan Ozcan, Niyazi Guler
Transseptal puncture (TSP) may not be possible in cases of an elastic, aneurysmal, or thickened interatrial septum (IAS). During deep inspiration (DI), the chest wall expands and the diaphragm descends. This makes intrapleural pressure to become more negative, which leads to movement of the IAS to the right side. The aim of this study was to verify prospectively the feasibility, safety, and outcome of DI associated with conventional TSP technique in patients with challenging IAS anatomy. From September 2012 to May 2016, 224 patients underwent TSP due to different indications...
November 1, 2016: American Journal of Cardiology
https://www.readbyqxmd.com/read/27870822/comparison-of-total-lung-capacity-determined-by-plethysmography-with-computed-tomographic-segmentation-using-caliper
#4
Andrew J Matsumoto, Brian J Bartholmai, Mark E Wylam
PURPOSE: Traditionally, determination of total lung capacity (TLC) by plethysmography (TLCpleth) has been important in the diagnosis of lung diseases. Alternatively, data acquired from computerized tomography (CT) can be utilized to calculate a measure of TLC (TLCCT). The clinical utility of TLCCT is not certain. We sought to determine, in a clinical setting, whether TLCCT correlates with TLCpleth across a range of lung diseases and scanning techniques. In addition, we determined whether TLCCT affects the interpretation of pulmonary function tests...
November 18, 2016: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/27867587/acute-chest-pain-in-a-triathlete-rupture-of-the-noncoronary-sinus-of-valsalva-into-the-right-ventricle
#5
Ernan Zhu, Ralf Westenfeld, Mareike Gastl, Florian Bönner, Alexander Assmann, Amir M Nia, Malte Kelm, Christian Jung
Sinus of Valsalva (SoV) aneurysm is a rare cardiac disease which can be congenital or acquired. A ruptured SoV aneurysm presents a clinical emergency and can lead to progressively deteriorating heart failure. Therefore, appropriate treatment requires prompt and accurate diagnosis. Most ruptured or nonruptured SoV aneurysms are diagnosed by the means of echocardiography. However, cardiovascular magnetic resonance (CMR) can provide information on precise anatomy and mechanisms due to its excellent soft tissue contrast and high resolution, and thereby allows for optimized preoperative planning of the repair strategy...
October 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/27843802/coronary-ectasia-in-a-man-on-breast-cancer-therapy-presenting-with-acute-coronary-syndrome
#6
Dana C Johnson, Luay Rifai, Parag V Patel
Limited data exist on the association between breast cancer treatments and coronary artery disease anatomy, particularly in males. We describe an unusual case of diffuse coronary ectasia in a man with breast cancer presenting with acute coronary syndrome (ACS). A 66-year-old man with breast cancer on paclitaxel, tamoxifen, and carboplatin chemotherapy regimen, presents with new onset chest pain. Electrocardiogram reveals anterolateral ST-segment depressions and elevated troponin I level. Emergent angiography revealed grossly ectatic coronary arteries with a total thrombotic occlusion of the mid right coronary artery...
October 2016: Avicenna Journal of Medicine
https://www.readbyqxmd.com/read/27800204/left-sided-upper-partial-anomalous-pulmonary-venous-return-through-a-curved-vein-joining-the-left-brachiocephalic-vein
#7
Eleonora Tricarico, Francesco Tricarico, Carlo Florio
The evaluation of pulmonary veins during cross-sectional imaging of the chest and the knowledge of their embryology and anatomy are useful for detecting congenital conditions that may be clinically significant. Moreover, with the spread of cross-sectional imaging it is very frequent to find anatomical variants; therefore the radiologist should easily recognize their appearances. This case report shows a left-side upper partial anomalous pulmonary venous return (PAPVR) through a "curved" vein that joins the left brachiocephalic vein, in a female patient who underwent whole-body computed tomography (CT) for staging endometrial cancer...
2016: Case Reports in Radiology
https://www.readbyqxmd.com/read/27799028/right-heart-catheterization-through-persistent-left-superior-vena-cava-an-extremely-rare-procedure-and-review-of-current-literature
#8
Abdel Rahman Al Emam, Ahmed Abuzaid, Mohammad Chamsi Pasha
Persistent left superior vena cava (PLSVC) is encountered occasionally during angiographic procedures. It usually coexists with right superior vena cava and drains to the right atrium through the coronary sinus, but multiple variations are described. Although PLSVC is extensively reported in the literature, there are very few articles addressing right heart catheterization in patients with isolated PLSVC. We present a patient with absent right superior vena cava and PLSVC draining to a dilated coronary sinus diagnosed during right heart catheterization in the setting of pulmonary hypertension...
October 28, 2016: Current Cardiology Reviews
https://www.readbyqxmd.com/read/27785539/computed-tomography-and-upper-gastrointestinal-series-findings-of-esophageal-bronchi-in-infants
#9
Gabrielle C Colleran, Ciara E Ryan, Edward Y Lee, Brian Sweeney, David Rea, Clare Brenner
BACKGROUND: Esophageal bronchus is a rare form of communicating bronchopulmonary foregut malformation and a rare but important cause of an opaque hemithorax on chest radiography. A higher incidence of esophageal bronchus is associated with esophageal atresia, tracheo-esophageal fistula (TEF) and VACTERL (vertebral defects, anal atresia, cardiac defects, tracheo-esophageal fistula, renal anomalies, and limb abnormalities) association. In the presence of these conditions, the pediatric radiologist may be the first to consider the diagnosis of esophageal bronchus or esophageal lung...
October 26, 2016: Pediatric Radiology
https://www.readbyqxmd.com/read/27774445/ecls-in-pediatric-cardiac-patients
#10
Matteo Di Nardo, Graeme MacLaren, Marco Marano, Corrado Cecchetti, Paola Bernaschi, Antonio Amodeo
Extracorporeal life support (ECLS) is an important device in the management of children with severe refractory cardiac and or pulmonary failure. Actually, two forms of ECLS are available for neonates and children: extracorporeal membrane oxygenation (ECMO) and use of a ventricular assist device (VAD). Both these techniques have their own advantages and disadvantages. The intra-aortic balloon pump is another ECLS device that has been successfully used in larger children, adolescents, and adults, but has found limited applicability in smaller children...
2016: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/27759681/beyond-the-cyst-the-many-contributions-of-isadore-tarlov-1905-1977-to-contemporary-neurosurgical-practice
#11
Anand Kaul, Sunil Manjila, Jonathan P Miller
: Isadore Max Tarlov (1905-1977) is primarily remembered for his 1938 description of the eponymous perineural "Tarlov cyst." However, during his long career as a neurosurgeon and researcher, he was responsible for many other observations and inventions that influenced the development of neurosurgery in the 20th century. While studying at Johns Hopkins Medical School he was acquainted with Walter Dandy, and he became the first resident to study under Wilder Penfield at the newly formed Montreal Neurological Institute...
November 2016: Neurosurgery
https://www.readbyqxmd.com/read/27745817/emergency-room-plain-radiograph-imaging-study-indications-an-analysis-of-quality-and-trends-at-a-large-academic-medical-center
#12
Kevin Kalisz, Vasant Garg, Kyle Basques, Robert Gilkeson, Peter Young
RATIONALE AND OBJECTIVES: This study aimed to assess the quality of and analyze trends among clinical indications received for emergency room radiograph studies. MATERIALS AND METHODS: Clinical indications provided by the emergency room and rapid care for consecutive chest, abdominal, and musculoskeletal radiographs were reviewed. Chart review was performed to analyze the provided indications compared to clinical information known to the ordering providers. Chest and abdominal radiograph indications were graded according to symptoms and physical examination signs and relevant past medical history...
October 10, 2016: Academic Radiology
https://www.readbyqxmd.com/read/27726918/anaesthetic-management-of-parturients-with-univentricular-congenital-heart-disease-and-the-fontan-operation
#13
R S Monteiro, D P Dob, M R Cauldwell, M A Gatzoulis
Women with a single ventricle circulation palliated with the Fontan operation require specialist multidisciplinary management. We report 14 such cases with successful pregnancies and detail the pathophysiology encountered. A combined obstetric and cardiac service between Chelsea and Westminster Hospital and Royal Brompton Hospital provides care for women with heart disease, and maintains a prospective database of referred women. We searched this database for women with a known Fontan circulation and reviewed the case notes and electronic patient records between January 1994 and December 2015...
December 2016: International Journal of Obstetric Anesthesia
https://www.readbyqxmd.com/read/27716642/automatic-exposure-control-calibration-and-optimisation-for-abdomen-pelvis-and-lumbar-spine-imaging-with-an-agfa-computed-radiography-system
#14
C S Moore, T J Wood, G Avery, S Balcam, L Needler, H Joshi, J R Saunderson, A W Beavis
The use of three physical image quality metrics, signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR) and mean effective noise equivalent quanta (eNEQm) have recently been examined by our group for their appropriateness in the calibration of an automatic exposure control (AEC) device for chest radiography with an Agfa computed radiography (CR) imaging system. This study uses the same methodology but investigates AEC calibration for abdomen, pelvis and spine CR imaging. AEC calibration curves were derived using a simple uniform phantom (equivalent to 20 cm water) to ensure each metric was held constant across the tube voltage range...
October 7, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27680418/contrast-enhanced-high-pitch-computed-tomography-in-pediatric-patients-without-electrocardiography-triggering-and-sedation-comparison-of-cardiac-image-quality-with-conventional-multidetector-computed-tomography
#15
Michael Esser, Sergios Gatidis, Matthias Teufel, Inés Ketelsen, Konstantin Nikolaou, Jürgen F Schäfer, Ilias Tsiflikas
OBJECTIVE: The aim of this study was to compare image quality of anatomical cardiac details without electrocardiography triggering, sedation, or heart rate-regulating drugs in contrast-enhanced pediatric chest computed tomography (CT), using high-pitch CT (HPCT) versus conventional pitch-mode technique (multidetector CT [MDCT]). METHODS: After written informed consent, 55 patients (median age, 11 years; range, 3-17 years) were prospectively included in this institutional review board-approved study...
September 27, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27650000/scan-plan-print-practice-perform-development-and-use-of-a-patient-specific-3-dimensional-printed-model-in-adult-cardiac-surgery
#16
Joshua L Hermsen, Thomas M Burke, Stephen P Seslar, David S Owens, Beth A Ripley, Nahush A Mokadam, Edward D Verrier
OBJECTIVE: Static 3-dimensional printing is used for operative planning in cases that involve difficult anatomy. An interactive 3D print allowing deliberate surgical practice would represent an advance. METHODS: Two patients with hypertrophic cardiomyopathy had 3-dimensional prints constructed preoperatively. Stereolithography files were generated by segmentation of chest computed tomographic scans. Prints were made with hydrogel material, yielding tissue-like models that can be surgically manipulated...
August 20, 2016: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/27648278/a-clinical-audit-of-anatomical-side-marker-use-in-a-paediatric-medical-imaging-department
#17
Kate Barry, Saravana Kumar, Rebecca Linke, Emma Dawes
INTRODUCTION: The gold standard in general radiography is to place a radiopaque anatomical side marker in the field of view for each radiographic image prior to exposure. The advent of digital radiography has allowed for anatomical side markers to be digitally added to films as part of post-processing. The aim of this audit was to identify whether general X-ray images performed in a tertiary Women's and Children's Hospital were being appropriately annotated with a definitive side marker, and to identify factors that may contribute to inappropriately labelled images...
September 2016: Journal of Medical Radiation Sciences
https://www.readbyqxmd.com/read/27625034/zones-of-adhesion-of-the-abdomen-implications-for-abdominoplasty
#18
D Alastair Taylor
BACKGROUND: The elucidation of the superficial fascial system (SFS) by Lockwood in 1991 has been the cornerstone of our understanding of abdominal excisional dynamics for the last 25 years. The SFS can be used for closure and, appropriately mobilized, for tension transmission in abdominoplasty, and lower body lifts. The pattern of SFS adhesion to muscle fascia and the zones of adhesion was also described but there are inconsistencies between the description and clinical experience. OBJECTIVES: This study was performed to better describe the pattern of subcutaneous tissue adhesion to the trunk...
September 13, 2016: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/27605206/the-additional-value-of-the-lateral-chest-radiograph-for-the-detection-of-small-pulmonary-nodules-a-roc-analysis
#19
Robin Alexander Kluthke, Ralph Kickuth, Paul Martin Bansmann, Carolin Tüshaus, Stephan Adams, Dieter Liermann, Johannes Kirchner
OBJECTIVE: For the past 30 years, many authors have described different advantages of the use of the additional lateral chest radiograph. However, some radiologic departments gave up performing the lateral view recently. A potential reason for this might be a lack of evidence for any diagnostic benefit of the additional lateral view of the thorax in recent studies. The objective of this study was to evaluate the diagnostic benefit of the additional lateral view for the detection of small pulmonary nodules compared with CT examinations as a gold standard...
September 26, 2016: British Journal of Radiology
https://www.readbyqxmd.com/read/27568119/does-the-routine-availability-of-ct-derived-ffr-influence-management-of%C3%A2-patients-with%C3%A2-stable-chest%C3%A2-pain-compared-to-ct%C3%A2-angiography%C3%A2-alone-the-ffrct-ripcord-study
#20
Nicholas P Curzen, James Nolan, Azfar G Zaman, Bjarne L Nørgaard, Ronak Rajani
OBJECTIVES: This study sought to determine the effect of adding computed tomography-derived fractional flow reserve (FFRCT) data to computed tomography angiographic (CTA) data alone for assessment of lesion severity and patient management in 200 patients with chest pain. BACKGROUND: Invasive and noninvasive tests used in the assessment of patients with angina all have disadvantages. The ideal screening test for patients presenting for the first time with chest pain would describe both coronary anatomy and the presence of ischemia and would be readily accessible, low cost, and noninvasive...
October 2016: JACC. Cardiovascular Imaging
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