Breath Holding: An involuntary or voluntary pause in breathing, sometimes accompanied by loss of consciousness.Hypoventilation: A reduction in the amount of air entering the pulmonary alveoli.Breath Tests: Any tests done on exhaled air.Apnea: A transient absence of spontaneous respiration.Respiration: The act of breathing with the LUNGS, consisting of INHALATION, or the taking into the lungs of the ambient air, and of EXHALATION, or the expelling of the modified air which contains more CARBON DIOXIDE than the air taken in (Blakiston's Gould Medical Dictionary, 4th ed.). This does not include tissue respiration (= OXYGEN CONSUMPTION) or cell respiration (= CELL RESPIRATION).Volition: Voluntary activity without external compulsion.Respiratory Mechanics: The physical or mechanical action of the LUNGS; DIAPHRAGM; RIBS; and CHEST WALL during respiration. It includes airflow, lung volume, neural and reflex controls, mechanoreceptors, breathing patterns, etc.Diving: An activity in which the organism plunges into water. It includes scuba and bell diving. Diving as natural behavior of animals goes here, as well as diving in decompression experiments with humans or animals.Artifacts: Any visible result of a procedure which is caused by the procedure itself and not by the entity being analyzed. Common examples include histological structures introduced by tissue processing, radiographic images of structures that are not naturally present in living tissue, and products of chemical reactions that occur during analysis.Respiratory Function Tests: Measurement of the various processes involved in the act of respiration: inspiration, expiration, oxygen and carbon dioxide exchange, lung volume and compliance, etc.Magnetic Resonance Imaging: Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.Heart Rate: The number of times the HEART VENTRICLES contract per unit of time, usually per minute.Exhalation: The act of BREATHING out.Pentanes: Five-carbon saturated hydrocarbon group of the methane series. Include isomers and derivatives.Membrane Potentials: The voltage differences across a membrane. For cellular membranes they are computed by subtracting the voltage measured outside the membrane from the voltage measured inside the membrane. They result from differences of inside versus outside concentration of potassium, sodium, chloride, and other ions across cells' or ORGANELLES membranes. For excitable cells, the resting membrane potentials range between -30 and -100 millivolts. Physical, chemical, or electrical stimuli can make a membrane potential more negative (hyperpolarization), or less negative (depolarization).Lactulose: A synthetic disaccharide used in the treatment of constipation and hepatic encephalopathy. It has also been used in the diagnosis of gastrointestinal disorders. (From Martindale, The Extra Pharmacopoeia, 30th ed, p887)Hydrogen: The first chemical element in the periodic table. It has the atomic symbol H, atomic number 1, and atomic weight [1.00784; 1.00811]. It exists, under normal conditions, as a colorless, odorless, tasteless, diatomic gas. Hydrogen ions are PROTONS. Besides the common H1 isotope, hydrogen exists as the stable isotope DEUTERIUM and the unstable, radioactive isotope TRITIUM.Carbon Dioxide: A colorless, odorless gas that can be formed by the body and is necessary for the respiration cycle of plants and animals.Volatile Organic Compounds: Organic compounds that have a relatively high VAPOR PRESSURE at room temperature.Supreme Court Decisions: Decisions made by the United States Supreme Court.Investments: Use for articles on the investing of funds for income or profit.Politics: Activities concerned with governmental policies, functions, etc.Bulimia: Eating an excess amount of food in a short period of time, as seen in the disorder of BULIMIA NERVOSA. It is caused by an abnormal craving for food, or insatiable hunger also known as "ox hunger".BrazilDental Staff: Personnel who provide dental service to patients in an organized facility, institution or agency.Longevity: The normal length of time of an organism's life.Hematopoietic Stem Cells: Progenitor cells from which all blood cells derive.Sirtuins: A homologous family of regulatory enzymes that are structurally related to the protein silent mating type information regulator 2 (Sir2) found in Saccharomyces cerevisiae. Sirtuins contain a central catalytic core region which binds NAD. Several of the sirtuins utilize NAD to deacetylate proteins such as HISTONES and are categorized as GROUP III HISTONE DEACETYLASES. Several other sirtuin members utilize NAD to transfer ADP-RIBOSE to proteins and are categorized as MONO ADP-RIBOSE TRANSFERASES, while a third group of sirtuins appears to have both deacetylase and ADP ribose transferase activities.Stem Cells: Relatively undifferentiated cells that retain the ability to divide and proliferate throughout postnatal life to provide progenitor cells that can differentiate into specialized cells.Hematopoietic Stem Cell Transplantation: Transfer of HEMATOPOIETIC STEM CELLS from BONE MARROW or BLOOD between individuals within the same species (TRANSPLANTATION, HOMOLOGOUS) or transfer within the same individual (TRANSPLANTATION, AUTOLOGOUS). Hematopoietic stem cell transplantation has been used as an alternative to BONE MARROW TRANSPLANTATION in the treatment of a variety of neoplasms.Blood Cells: The cells found in the body fluid circulating throughout the CARDIOVASCULAR SYSTEM.Signal Transduction: The intracellular transfer of information (biological activation/inhibition) through a signal pathway. In each signal transduction system, an activation/inhibition signal from a biologically active molecule (hormone, neurotransmitter) is mediated via the coupling of a receptor/enzyme to a second messenger system or to an ion channel. Signal transduction plays an important role in activating cellular functions, cell differentiation, and cell proliferation. Examples of signal transduction systems are the GAMMA-AMINOBUTYRIC ACID-postsynaptic receptor-calcium ion channel system, the receptor-mediated T-cell activation pathway, and the receptor-mediated activation of phospholipases. Those coupled to membrane depolarization or intracellular release of calcium include the receptor-mediated activation of cytotoxic functions in granulocytes and the synaptic potentiation of protein kinase activation. Some signal transduction pathways may be part of larger signal transduction pathways; for example, protein kinase activation is part of the platelet activation signal pathway.Mountaineering: A sport involving mountain climbing techniques.Purkinje Cells: The output neurons of the cerebellar cortex.Olivary Nucleus: A part of the MEDULLA OBLONGATA situated in the olivary body. It is involved with motor control and is a major source of sensory input to the CEREBELLUM.Cerebellar Cortex: The superficial GRAY MATTER of the CEREBELLUM. It consists of two main layers, the stratum moleculare and the stratum granulosum.Cerebellum: The part of brain that lies behind the BRAIN STEM in the posterior base of skull (CRANIAL FOSSA, POSTERIOR). It is also known as the "little brain" with convolutions similar to those of CEREBRAL CORTEX, inner white matter, and deep cerebellar nuclei. Its function is to coordinate voluntary movements, maintain balance, and learn motor skills.Nerve Fibers: Slender processes of NEURONS, including the AXONS and their glial envelopes (MYELIN SHEATH). Nerve fibers conduct nerve impulses to and from the CENTRAL NERVOUS SYSTEM.CaliforniaTomography, X-Ray Computed: Tomography using x-ray transmission and a computer algorithm to reconstruct the image.Tomography Scanners, X-Ray Computed: X-ray image-detecting devices that make a focused image of body structures lying in a predetermined plane from which more complex images are computed.Physicians: Individuals licensed to practice medicine.Academic Medical Centers: Medical complexes consisting of medical school, hospitals, clinics, libraries, administrative facilities, etc.Health Fairs: Community health education events focused on prevention of disease and promotion of health through audiovisual exhibits.Exercise: Physical activity which is usually regular and done with the intention of improving or maintaining PHYSICAL FITNESS or HEALTH. Contrast with PHYSICAL EXERTION which is concerned largely with the physiologic and metabolic response to energy expenditure.Physical Exertion: Expenditure of energy during PHYSICAL ACTIVITY. Intensity of exertion may be measured by rate of OXYGEN CONSUMPTION; HEAT produced, or HEART RATE. Perceived exertion, a psychological measure of exertion, is included.Magnetic Resonance Imaging, Cine: A type of imaging technique used primarily in the field of cardiology. By coordinating the fast gradient-echo MRI sequence with retrospective ECG-gating, numerous short time frames evenly spaced in the cardiac cycle are produced. These images are laced together in a cinematic display so that wall motion of the ventricles, valve motion, and blood flow patterns in the heart and great vessels can be visualized.Image Enhancement: Improvement of the quality of a picture by various techniques, including computer processing, digital filtering, echocardiographic techniques, light and ultrastructural MICROSCOPY, fluorescence spectrometry and microscopy, scintigraphy, and in vitro image processing at the molecular level.Heart: The hollow, muscular organ that maintains the circulation of the blood.Image Interpretation, Computer-Assisted: Methods developed to aid in the interpretation of ultrasound, radiographic images, etc., for diagnosis of disease.Contrast Media: Substances used to allow enhanced visualization of tissues.Reproducibility of Results: The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.

Six-year experience routinely using moderate deep inspiration breath-hold for the reduction of cardiac dose in left-sided breast irradiation for patients with early-stage or locally advanced breast cancer. (1/39)

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Free-breathing cardiac MR with a fixed navigator efficiency using adaptive gating window size. (2/39)

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Hemoptysis due to breath-hold diving following chemotherapy and lung irradiation. (3/39)

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Optimization of single shot 3D breath-hold non-enhanced MR angiography of the renal arteries. (4/39)

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High resolution navigated three-dimensional T(1)-weighted hepatobiliary MRI using gadoxetic acid optimized for 1.5 Tesla. (5/39)

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What can computed tomography and magnetic resonance imaging tell us about ventilation? (6/39)

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Peripheral vascular response to inspiratory breath hold in paediatric homozygous sickle cell disease. (7/39)

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Hypofractionated image-guided breath-hold SABR (stereotactic ablative body radiotherapy) of liver metastases--clinical results. (8/39)

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Being able to assist patients in achieving a single breath-hold could greatly improve the long term survival and quality of life of breast cancer patients.
Injury to vital structures posterior to the sternum is a complication associated with redo sternotomy in congenital cardiac surgery. The goal of our study was a novel evaluation of real-time cine cardiovascular magnetic resonance (CMR) to predict the presence of significant retrosternal adhesions of cardiac and vascular structures prior to redo sternotomy in patients with congenital heart disease. Twenty-three patients who had prior congenital heart surgery via median sternotomy had comprehensive CMR studies prior to redo sternotomy. The real time cine (RTC) sequence that was used is an ungated balanced steady-state free precession (bSSFP) sequence using SENSitivity Encoding for acceleration with real-time reconstruction. Spontaneously breathing patients were instructed to take deep breaths during the acquisition whilst increased tidal volumes were delivered to mechanically ventilated patients. All patients underwent redo cardiac surgery subsequently and the presence and severity of retrosternal
Injury to vital structures posterior to the sternum is a complication associated with redo sternotomy in congenital cardiac surgery. The goal of our study was a novel evaluation of real-time cine cardiovascular magnetic resonance (CMR) to predict the presence of significant retrosternal adhesions of cardiac and vascular structures prior to redo sternotomy in patients with congenital heart disease. Twenty-three patients who had prior congenital heart surgery via median sternotomy had comprehensive CMR studies prior to redo sternotomy. The real time cine (RTC) sequence that was used is an ungated balanced steady-state free precession (bSSFP) sequence using SENSitivity Encoding for acceleration with real-time reconstruction. Spontaneously breathing patients were instructed to take deep breaths during the acquisition whilst increased tidal volumes were delivered to mechanically ventilated patients. All patients underwent redo cardiac surgery subsequently and the presence and severity of retrosternal
Purpose: Patients undergoing radiotherapy (RT) for left-sided breast cancer have increased risk of coronary artery disease. Deep Inhalation Breath Hold assisted RT (DIBH-RT) is shown to increase the geometric separation of the target area and heart, reducing cardiac radiation dose. The purposes of this study are to use Cine MV portal images to determine the stability of spirometer-guided DIBH-RT and examine the dosimetric cardiopulmonary impact of this technique. Methods: Twenty consecutive patients with left-sided breast cancer were recruited to the IRB-approved study. Free-breathing (FB) and DIBH-CTs were acquired at simulation. Rigid registration of the FB-CT and DIBH-CT was performed using primarily breast tissue. Treatment plans were created for each FB-CT and DIBH-CT using identical paired tangent fields with field-in-field or electronic compensation techniques. Dosimetric evaluation included mean and maximum (Dmax) doses for the left anterior descending artery (LAD), mean heart dose, and ...
BACKGROUND: Electromagnetic navigational bronchoscopy (ENB) is guided bronchoscopy to pulmonary nodules (PN) that relies on a preprocedural chest CT to create a three-dimensional (3D) virtual airway map. The CT is traditionally done at a full inspiratory breath hold (INSP), but the procedure is performed while the patient tidal breaths, when lung volumes are closer to functional residual capacity. Movement of a PN from INSP to expiration (EXP) has been shown to average 17.6 mm. Therefore, the hypothesis of this study is that preprocedural virtual maps built off a CT closer to physiological lung volumes during bronchoscopy may better represent the actual 3D location of a PN ...
Cardiac magnetic resonance (CMR) is superior to other imaging modalities for determining infarct size (IS) (1) and late gadolinium enhancement (LGE) CMR is considered the gold standard for quantifying acute and chronic myocardial infarction (MI) (2,3). The pathophysiological foundation for hyperenhancement on LGE-CMR is based on an increased distribution volume of an extracellular contrast agent within scarred tissue in chronic MI and in cells that have lost their cellular integrity due to necrosis in acute myocardial infarction (AMI) (4,5). Reimer and Jennings (6) described an ischemic zone histopathologically in AMI containing viable myocytes adjacent to the infarction as the border zone, i.e., salvaged myocardium. Arheden et al. (4,5) showed that salvaged myocardium (myocardium at risk [MaR] − infarction) had an increased extracellular volume (ECV) compared with normal myocardium measured by CMR and validated this by radioisotopes in rats subjected to ischemia. Experimental studies with ...
To develop techniques with MRI of Helium-3 gas to give functional images of the lungs. The goal is to test a single breath-hold functional 3-He MRI pulse sequence with sensitivity to multiple functional aspects of the luncg physiology. A group of 20 healthy volunteers willbe recruited from the local research group and the results compared with existing methods that require seperate breath-holds of 3He ...
Multislice CT scanners are the newest class of CT scanners and they have not one but many detectors. These scanners can acquire up to 4 slices of data from the body in the same time it takes a single-slice CT scanner to acquire one. Multislice CT allows for rapid cardiac imaging during a single breath-hold. A multislice scanner operated in helical mode provides information that can be used to reconstruct 3D cardiac images in arbitrary phases of the cardiac cycle.. A 71-year-old man with hypertension, hypercholesterolemia, and known aortic and peripheral vascular disease was imaged with a LightSpeed 4-slice, multislice CT scanner (GE Medical Systems). Ten minutes before the cardiac scan, the patient received intravenous contrast material (150 mL of 300 mgI/mL) for a CT study of his abdomen. The cardiac scan was acquired during a 35-s breath-hold, and simultaneous acquisition of the ECG enabled reconstruction using retrospective gating (Figure 1⇓). The helical pitch was 0.85 (relative to the ...
Westwood et al. A single breath-hold multiecho T2* cardiovascular magnetic resonance technique for diagnosis of myocardial iron overload. J. Magn. Reson. Imaging (2003) vol. 18 (1) pp. 33-9 ...
PALO ALTO, Calif., March 28, 2013 /PRNewswire/ -- Varian Medical Systems (NYSE: VAR), the world leader in radiotherapy equipment and software, is highlighting its Calypso® System as a tool designed to help doctors reduce womens risk of developing heart disease years after treatment for breast cancer. The system uses GPS for the Body® technology to help minimize exposure of the heart during treatment for breast cancer.. "We use the Calypso System for real-time motion tracking along with a special breath-hold technique," says L. Christine Fang , MD, assistant professor of radiation oncology at the Seattle Cancer Care Alliance, University of Washington. "In this way, we can more accurately deliver adequate doses that we feel are necessary to reduce the chance of tumor recurrence. All women with left-sided breast cancer are evaluated for this approach to decrease radiation exposure to the heart.". The Calypso System utilizes a set of tiny transmitters that are temporarily affixed to the skin near ...
TY - JOUR. T1 - Reduction of organ motion effects in IMRT and conformal 3D radiation delivery by using gating and tracking techniques. AU - Giraud, P.. AU - Yorke, E.. AU - Jiang, S.. AU - Simon, L.. AU - Rosenzweig, K.. AU - Mageras, G.. PY - 2006/9. Y1 - 2006/9. N2 - Respiration-gated radiotherapy offers a significant potential for improvement in the irradiation of tumour sites affected by respiratory motion such as lung, breast and liver tumours. An increased conformality of irradiation fields leading to decreased complications rates of organs at risk (lung, heart) is expected. Four main strategies are used to reduce respiratory motion effects: integration of respiratory movements into treatment planning, breath-hold techniques, respiratory gating techniques, and tracking techniques. Measurements of respiratory movements can be performed either in a representative sample of the general population, or directly on the patient before irradiation. The measured amplitude could be applied to a ...
In this study, we did not observe any significant difference in the improvement in PEF after inhalation of salbutamol using a pMDI and VHC by either single maximal inhalation with a breath-hold technique or 5 tidal breaths technique.. It has been observed that many children who suffer from asthma use their inhaler devices incorrectly, even after instruction for correct use.8,9 The most difficult skill for children using a metered-dose inhaler was progressive inhalation of the medicine slowly and deeply through the mouth and the need to hold their breath for a count of 10.10-12. A simple and efficient method to deliver drug through a pMDI in children must be identified to improve compliance and symptom control, and to minimize side effects. Patients can take a slow single breath to retrieve the medication or take tidal breaths from the chamber as per the Global Initiative on Asthma. There are very few studies done in this area in children to compare effectiveness of either method. The usual ...
Since real-time acquisition of 3D echocardiographic data is achievable in practice, many volume rendering algorithms have been proposed for visualization p
In a prospective longitudinal study, children with severe breath holding spells (BHS) were enrolled to evaluate the effect of oral iron in decreasing the frequency of BHS and to document the natural history of such spells in children not treated and
The characteristic of breath holding spells may present with range of color form pallor to cyanosis. Patient may loss the consciousness or resolve spontaneously.
Is Breath-holding while exercising important in terms of improving fitness? Recently there have been studies showing that High Intensity workouts may be par...
The main finding of this study is that MI can be accurately detected (91% accuracy) with the use of an ultrafast DE-CMR technique that can acquire snapshot images during free breathing. Importantly, the technique was robust and provided full coverage of the heart in ,30 seconds, and specificity was excellent at 96%. However, there were some limitations compared with the standard approach. Sensitivity was 11% lower (87% versus 98%), and there was a tendency to underestimate both global infarct size and the transmural extent of infarction.. Despite these limitations, the development of subsecond imaging has important clinical implications. For instance, although CMR is a highly attractive modality for the assessment of MI and viability,22 some practical drawbacks potentially limit the impact of this technology for general clinical practice. In comparison to other imaging modalities, standard CMR is more complex: Patient and protocol setup times are longer, and multiple breath-holds and longer ...
After your usual exhale, pinch your nose and count your BHT (breath holding time) in seconds. Keep nose pinched until you experience the first desire to breathe. Practice shows that this first desire appears together with an involuntary push of the diaphragm or swallowing movement in the throat. (Your body warns you, "Enough!") If you release the nose and start breathing at this time, you can resume your usual breathing pattern (in the same way as you were breathing prior to the test). Do not extend breath holding too long. This is the most common mistake. You should not gasp for air or open your mouth when you release your nose. The test should be easy and not cause you any stress. The BHT test does not interfere with your usual breathing ...
After your usual exhale, pinch your nose and count your BHT (breath holding time) in seconds. Keep nose pinched until you experience the first desire to breathe. Practice shows that this first desire appears together with an involuntary push of the diaphragm or swallowing movement in the throat. (Your body warns you, "Enough!") If you release the nose and start breathing at this time, you can resume your usual breathing pattern (in the same way as you were breathing prior to the test). Do not extend breath holding too long. This is the most common mistake. You should not gasp for air or open your mouth when you release your nose. The test should be easy and not cause you any stress. The BHT test does not interfere with your usual breathing ...
I think there will be side effects in the long term. Thoughts anyone? _________________ The new record in breath-holding recently went to a Swiss man who didnt breathe for nearly 20 minutes. Scientists explain how he did it. By Emily Sohn | Wed Feb 17, 2010 08:04 AM ET Peter Colat, a Swiss freediver, held his breath underwater for 19 minutes and 21 seconds, breaking the world record in breath-holding. AP THE GIST:
The purpose of this study was 1) to answer whether the reduction in spleen size in breath-hold apnea is an active contraction or a passive collapse secondary to reduced splenic arterial blood flow and 2) to monitor the spleen response to repeated bre
Background: Endogenous triggers such as voluntary breath-holding induce various cardiovascular responses typically including modification of blood CO2. During dynamic exe..
Looks like its time for your weekly dose of cuteness! Abby went to the Neuro yesterday and is doing really good. The doc suggested something I hadnt realized. I have really been perplexed on why Abby has been a poor eater and then why she just stopped and refused almost alltogether. He looked right at me and told me it is because she can. These girls live trapped in these tiny little bodies with no free will or ability and they will do WHAT they can do. Thats why you have teeth grinding and breath holding and eye rolling. Its the same with the eating. She has power there. She doesnt realize she is harming herself but she can decide when she eats, how much and it is a moment where she can be in charge. Made total sense to me ...
... supports clear lungs and free breathing by supporting normal metabolic function, fluid balance, and normal tissue repair.
Suzanne Dixon, MPH, MS, RD is an internationally recognized expert in cancer prevention and management. Learn more about Suzanne, here.
Question - What is the cure for sinus infection and upper respiratory infection while suffering from asthma? . Ask a Doctor about diagnosis, treatment and medication for Asthma, Ask an Allergist and Immunologist
TY - JOUR. T1 - Dosimetric Considerations in Respiratory-Gated Deep Inspiration Breath-Hold for Left Breast Irradiation. AU - Walston, Steve. AU - Quick, Allison M.. AU - Kuhn, Karla. AU - Rong, Yi. PY - 2017/1/1. Y1 - 2017/1/1. N2 - Purpose: To present our clinical workflow of incorporating AlignRT for left breast deep inspiration breath-hold treatments and the dosimetric considerations with the deep inspiration breath-hold protocol. Material and Methods: Patients with stage I to III left-sided breast cancer who underwent lumpectomy or mastectomy were considered candidates for deep inspiration breath-hold technique for their external beam radiation therapy. Treatment plans were created on both free-breathing and deep inspiration breath-hold computed tomography for each patient to determine whether deep inspiration breath-hold was beneficial based on dosimetric comparison. The AlignRT system was used for patient setup and monitoring. Dosimetric measurements and their correlation with chest wall ...
Roberto M. Lang, MD Victor Mor-Avi, PhD. OVER THE LAST 3 DECADES, 3D ECHOCARDIOGRAPHIC IMAGING HAS BEEN DEVELOPED with the aim of providing additional anatomic detail and improved spatial relationships that were not available from 2D images. To achieve this goal, the most significant advance during the last decade was the introduction of matrix-array transducers, which have enabled the transition from slow and labor-intense off-line reconstruction of 3D datasets to real-time volumetric imaging. These transducers, which contain arrays of piezoelectric elements capable of scanning pyramidal volumes rather than thin slices, allow fast acquisition of RT-3DE datasets during a single breath-hold, without the need for off-line reconstruction. This, to a large extent, has eliminated motion artifacts known to have adversely affected the now-outdated multiplane acquisition and reconstruction. The use of parallel processing met the need for increased computational power, which was necessary to process the ...
We demonstrate real-time acquisition, processing, and display of tissue structure, birefringence, and blood flow in a multi-functional optical coherence tomography (MF-OCT) system. This is accomplished by efficient data processing of the phase-resolved inteference patterns without dedicated hardware or extensive modification to the high-speed fiber-based OCT system. The system acquires images of 2048 depth scans per second, covering an area of 5 mm in width×1.2 mm in depth with real-time display updating images in a rolling manner 32 times each second. We present a video of the system display as images from the proximal nail fold of a human volunteer are taken.. ©2003 Optical Society of America. Full Article , PDF Article ...
The smart e-bike monitoring system (SEMS) is a platform for the real-time acquisition of usage data from electrically-assisted bikes (also called pedelecs or e-bikes). It is autonomous (runs off the bike battery), replicable (open source and open hardware), scalable (different fleet sizes) and modular (sensors can be added), so it can be used for further research and development. The system monitors location (global positioning system), rider control data (level of assistance) and other custom sensor input in real time. The SEMS data feeds an online interface for data analysis, for riders to view their own data and for sharing on social media. The basic system can be replicated by other researchers and can be extended with modules to explore various issues in e-bike research. The source code and hardware design are publicly available, under the General Public License, for non-commercial use. SEMS was implemented on 30 bikes and collected data during 10 months of real-word trials in the UK. This study
Dont hold you breath while listening to this podcast - because youd be doing so for longer than 20 seconds - and you will have apnea. Do however, listen to learn more about cyanotic and pallid breath holding spells so that you can be prepared to diagnose and manage them in the Emergency Department.. You can listen to the podcast right here:. ...
With SGRT, left-sided breast cancer patients can be positioned and monitored continuously to maintain position errors within 5 mm. Low intra-fraction variability and good stability can be achieved with the air-volume BH system, however, additional patient position information is available with SGRT, …
After your usual exhale, pinch your nose and count your BHT (breath holding time) in seconds. Keep nose pinched until you experience the first desire to breathe. Practice shows that this first desire appears together with an involuntary push of the diaphragm or swallowing movement in the throat. (Your body warns you, "Enough!") If you release the nose and start breathing at this time, you can resume your usual breathing pattern (in the same way as you were breathing prior to the test). Do not extend breath holding too long. This is the most common mistake. You should not gasp for air or open your mouth when you release your nose. The test should be easy and not cause you any stress. The BHT test does not interfere with your usual breathing ...
After your usual exhale, pinch your nose and count your BHT (breath holding time) in seconds. Keep nose pinched until you experience the first desire to breathe. Practice shows that this first desire appears together with an involuntary push of the diaphragm or swallowing movement in the throat. (Your body warns you, "Enough!") If you release the nose and start breathing at this time, you can resume your usual breathing pattern (in the same way as you were breathing prior to the test). Do not extend breath holding too long. This is the most common mistake. You should not gasp for air or open your mouth when you release your nose. The test should be easy and not cause you any stress. The BHT test does not interfere with your usual breathing ...
Long but very, very important post: Recent Tragedies Put New Focus on Shallow Water Blackout By Michael Popke AB Managing Editor The July deaths of two 21-year-old men in a Staten Island, N.Y., public pool brought increased attention to shallow water blackout a largely unknown and potentially fatal condition that occurs when an insufficient amount of carbon dioxide is available to activate the body s natural impulse to breathe. Swimmers and free divers who practice prolonged
TY - JOUR. T1 - VEGF 165b in the developing vasculatures of the fetal human eye. AU - Baba, Takayuki. AU - Mcleod, D. Scott. AU - Edwards, Malia. AU - Merges, Carol. AU - Sen, Tanusree. AU - Sinha, Debasish. AU - Lutty, Gerard Anthony. PY - 2012/3. Y1 - 2012/3. N2 - VEGF 165b is an anti-angiogenic form of VEGF 165 produced by alternative splicing. The localization of pro-angiogenic VEGF 165 and anti-angiogenic VEGF 165b was investigated during development of the vasculatures in fetal human eyes from 7 to 21 weeks gestation (WG). The fetal vasculature of vitreous, which includes tunica vasculosa lentis (TVL), had moderate VEGF 165 immunoreactivity at 7WG and very little VEGF 165b. Both forms were elevated at 12WG. VEGF 165 then decreased around 17WG when the TVL regresses but VEGF 165b remained elevated. In choroid, VEGF 165 was present in forming choriocapillaris (CC) and retinal pigment epithelium (RPE) at 7WG while VEGF165b was present in CC and mesenchymal precursors within the choroidal ...
Atherosclerotic cardiovascular disease is the leading cause of death worldwide. To decrease mortality and morbidity in cardiovascular disease, the development of accurate, non-invasive methods for early diagnosis of atherosclerotic cardiac and vascular engagement is of considerable clinical interest. Cardiovascular ultrasound imaging is today the cornerstone in the routine evaluation of cardiovascular function and recent development has resulted in two new techniques, tissue velocity imaging (TVI) and speckle tracking, which allow objective quantification of cardiovascular function. TVI and speckle tracking are the basis for three new approaches to cardiac and vascular monitoring presented in this thesis: wave intensity wall analysis (WIWA), two-dimensional strain imaging in the common carotid artery, and the state diagram of the heart.. WIWA uses longitudinal and radial strain rate as input for calculations of wave intensity in the arterial wall. In this thesis, WIWA was validated against a ...
Affiliation:東京都市大学,工学部,教授, Research Field:Circulatory organs internal medicine,Medical systems,Biomedical engineering/Biological material science,Fluid engineering,Rehabilitation science/Welfare engineering, Keywords:心機能,wave intensity,頚動脈,エコー・トラッキング,Wave intensity,超音波,超音波計測,carotid artery,ウェーブ・インテンシティ,diastolic function, # of Research Projects:12, # of Research Products:144, Ongoing Project:ヨガによる高齢者の不整脈予防効果の検討:心・血管および自律神経機能解析の応用
Learn about the Dixon Family Crest, its Origin and History. Where did the Dixon surname come from? Where did the family branches go?
Marmor har fascinert arkitekter, skulptører og designere i årtusner, trolig på grunn av dens totalt unike strømninger. Tom Dixon har også latt seg inspirere av materialet i kolleksjonen Stone, og produsert vakre, delikate lamper og lysholdere i vakker hvit marmor. Designer: Tom Dixon Farge: Hvit marmor og messing Materiale: Marmor, messing og glass. Dimensjon: Ø 180…
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The skin of the face, normally around the mouth, and the mucosa of the mouth and/or throat, as well as the tongue, swell over the period of minutes to hours. The swelling can also occur elsewhere, typically in the hands. The swelling can be itchy or painful. There may also be slightly decreased sensation in the affected areas due to compression of the nerves. Urticaria (hives) may develop simultaneously. In severe cases, stridor of the airway occurs, with gasping or wheezy inspiratory breath sounds and decreasing oxygen levels. Tracheal intubation is required in these situations to prevent respiratory arrest and risk of death. Sometimes, the cause is recent exposure to an allergen (e.g. peanuts), but more often it is either idiopathic (unknown) or only weakly correlated to allergen exposure. In hereditary angioedema, often no direct cause is identifiable, although mild trauma, including dental work and other stimuli, can cause attacks.[4] There is usually no associated itch or urticaria, as it ...
The marked reduction in breath-hold time (i.e., volitional apnea) with cold water immersion and submersion has obvious implication for escape from within vessels, helicopters, and vehicles that have accidentally sunk, as a well as immersion in rough water. The volume of the inspiratory gasp and the minute volumes resulting from the uncontrollable hyperventilation (minute ventilation ,100 liters) that occurs on immersion in cold water should be compared with the lethal volume for sea water aspiration, 22 ml/kg or ∼1.5 liters for a 70-kg human (52). The observation of the high incidence of cardiac arrhythmias following the release of breath hold has implications for snorkeling and breath-hold diving, as well as for survival following near drowning.. In many countries, water birth has become commonplace. For example in the United Kingdom, the UK Central Council for Nursing has stated that assistance at water birth is part of a midwifes duties and not "special treatment" (13, 78). Each midwife ...
BACKGROUND: The latest gamma-camera generation with cadmium-zinc-telluride (CZT) detectors allows myocardial perfusion imaging (MPI) with respiratory triggering at breath-hold. We assessed its impact on functional left ventricular (LV) parameters. METHODS: Twenty-eight consecutive patients underwent a one-day (99m)Tc-tetrofosmin pharmacologic stress/rest imaging protocol on a novel CZT camera. Electrocardiogram-gated high-dose (rest) MPI was performed without and with real-time respiratory triggering by intermittent scanning confined to breath-hold at deep inspiration. We studied the effect of respiratory triggering at deep inspiration levels on LV wall motion, wall thickening, LV volumes and ejection fraction (LVEF) compared to regular MPI without respiratory triggering. RESULTS: Compared to regular MPI without respiratory triggering, systolic and diastolic LV volumes and stroke volumes decreased significantly (P , 0.05) when respiratory triggering was applied. By contrast, there was no ...
We investigated whether the involuntary breathing movements (IBM) during the struggle phase of breath holding, together with peripheral vasoconstriction and progressive hypercapnia, have a positive effect in maintaining cerebral blood volume. The central hemodynamics, arterial oxygen saturation, brain regional oxyhemoglobin (bHbO(2)), deoxyhemoglobin, and total hemoglobin changes and IBM were monitored during maximal dry breath holds in eight elite divers. The frequency of IBM increased (by approximately 100%), and their duration decreased ( approximately 30%), toward the end of the struggle phase, whereas the amplitude was unchanged (compared with the beginning of the struggle phase). In all subjects, a consistent increase in brain regional deoxyhemoglobin and total hemoglobin was also found during struggle phase, whereas bHbO(2) changed biphasically: it initially increased until the middle of the struggle phase, with the subsequent relative decline at the end of the breath hold. Mean arterial ...
To evaluate free-breathing Navigator-triggered 3-D T1-weighted MRI (NAV-LAVA) compared to breath-hold (BH)-LAVA among cystic and solid renal masses.With an IRB waiver, 44 patients with 105 renal masses (71 non-enhancing cysts and 14 cystic and 20 solid renal masses) underwent MRI between 2016 and 2017 where BH-LAVA and NAV-LAVA were performed.
Apnea Australia is Australias leading Freediving school, devoted to the safe practice of breath-hold diving in its various forms. Apnea Australia was established by Erez Beatus - former world record holder for the CNF discipline. Apnea Australia is the fastest growing school in Australia and has the largest amount of certifications around the country. It also has the most professional instructors due to the high standards it maintains.. ...
Uplift parents that the child purposefulness suffer no belligerent effects from breath holding and that they should not support the breath-holding behavior or give out with in to the child. Demanding depletion of macrophages prevents pituitaryВ-adrenal activation in feedback to subpyrogenic, but not too pyrogenic, doses of bacterial endotoxin in rats. Stassen, N A, C M Breit, L A Norfleet, and H C Polk, Jr 2003 [url=http://www.readingohio.org/docs/plan/academy16/class15/]buy vytorin 30mg mastercard[/url] cholesterol count. In the salivary gland, epimastigotes also continue to multiply and long run convert into non-proliferative, stumpy, metacyclic trypomastigotes, which are masterly to infect a budding generous play the host and as a result on the cycle. The hyper-expression of 128 genes was described in this model, indicating sturdy modulation of the p38/MAPK, JAK/STAT, and PI3K signalling pathways (Okamoto et al. All the while, the DuPont live would be official in the lit repeatedly ...
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Description Tom Dixon rocks on with this chic trio of stackable marble tealights. Each one is unique, as different as the piece of natural Green Forest stone it was carved from. Create ad hoc architectural sculptures for a custom tablescape with atmospheric candlelight. Specifications Size 5 h x 3.25 dia (12.8x8cm)
Geoffrey Dixon is a specialist in Neurological Surgery, Spine Surgery who can be reached at 331 462-1700 and whose practice locations include: Elmhurst
This article looks into some of the features of the free SABR model, in particular in the context of the negative-rate environment.
100 PELICULAS SOBRE EDUCACION (@ramon3434: 100 PELICULAS SOBRE #EDUCACION | @scoopit http://t.co/GKEw4f6e3m #edumex #educaPR #cine) | Ticenelaula
Noninvasive imaging of the airways has made remarkable progress in the past decade. The introduction of multirow detector CT scanners has made it possible to acquire high-resolution images of the upper, central, and segmental airways within a short acquisition time. The CT scan data can be reformatted into three-dimensional images to create virtual bronchoscopic renderings that closely resemble the images obtained from flexible broncho-scopy. in detail. Virtual bronchoscopy has been applied increasingly for the evaluation of the airways, especially to detect benign and malignant airway stenosis. Its potential for depicting tracheobronchial stenosis has been demonstrated with single-detector helical CT scanning, but the z-axis resolution has been limited by scan collimation if complete scan acquisition of the chest was to be achieved within a single breath-hold. A previous study demonstrated that virtual bronchoscopy with multirow detector CT scanning enables the reduction of scan collimation to ...
TY - JOUR. T1 - Gadolinium-enhanced 3D MRA of the aortic arch vessels the detection of atherosclerotic cerebrovascular occlusive disease. AU - Krinsky, Glenn. AU - Maya, Menahem. AU - Rofsky, Neil. AU - Lebowitz, Jonathan. AU - Nelson, Peter Kim. AU - Ambrosino, Michael. AU - Kaminer, Evan. AU - Earls, Jay. AU - Masters, Lynette. AU - Giangola, Gary. AU - Litt, Andrew. AU - Weinreb, Jeffrey. PY - 1998/4/18. Y1 - 1998/4/18. N2 - Purpose: Our goal was to evaluate non-breath-hold Gd-enhanced 3D MR angiography (MRA) for the detection of atherosclerotic occlusive disease of the aortic arch vessels and to compare image quality with two breath-hold techniques. Method: One hundred sixty consecutive patients with known or clinically suspected atherosclerotic cerebrovascular occlusive disease underwent Gd-enhanced 3D MRA of the aortic arch and great vessels. One hundred twenty-six examinations were performed with the body coil after infusion of 40 ml of Gd-DTPA; 89 of these were performed without breath- ...
TY - JOUR. T1 - A method of detecting and quantifying severity of myocardial perfusion defects with intravenous ultrasound contrast and breath holding during stress echocardiography. AU - Porter, Thomas Richard. AU - OLeary, Edward Lewis. AU - Silver, Mary. AU - Oehlke, Heidi. AU - Xie, Feng. PY - 2003/7/1. Y1 - 2003/7/1. N2 - Although breath holding is commonly used to improve and maintain image quality during stress echocardiography, its effects on the qualitative and quantitative analysis of myocardial contrast enhancement (MCE) following intravenously injected microbubbles is unknown. The purpose of this study was to determine how breath holding affects MCE following either an intravenous bolus or continuous infusion of perfluorocarbon containing microbubbles. In 48 patients, intravenous Optison was given at peak dobutamine stress to assess myocardial perfusion. The degree of myocardial opacification was assessed immediately following a breath hold in inspiration (BHini), at the end of a ...
article{14f1f0b5-9450-40c9-a646-73a81a8fdc92, abstract = {The concentration of the protein S100B in serum is used as a brain damage marker in various conditions. We wanted to investigate whether a voluntary, prolonged apnea in trained breath-hold divers resulted in an increase of S100B in serum. Nine trained breath-hold divers performed a protocol mimicking the procedures they use during breath-hold training and competition, including extensive preapneic hyperventilation and glossopharyngeal insufflation, in order to perform a maximum-duration apnea, i.e., static apnea (average: 335 s, range: 281-403 s). Arterial blood samples were collected and cardiovascular variables recorded. Arterial partial pressures of O2 and CO2 (PaO2 and PaCO2) were 128 Torr and 20 Torr, respectively, at the start of apnea. The degree of asphyxia at the end of apnea was considerable, with PaO2 and PaCO2 reaching 28 Torr and 45 Torr, respectively. The concentration of S100B in serum transiently increased from 0.066 ...
CMR imaging was performed with a 1.5-T system (Magnetom Avanto, Siemens Medical Systems, Erlangen, Germany) using a body and phased array coil. The body coil was adopted for measurements of the relative signal intensities of the myocardium and skeletal muscle because of its more homogeneous signal.. Cine steady-state free precession (cine-SSFP) CMR images were acquired during breath-holds in the short-axis, 2-chamber, and 4-chamber planes; on short-axis images, the left ventricle was completely encompassed from the base to the apex, acquiring a total of 10 to 12 images. Cine-SSFP images were obtained using the following parameters: repetition time 51.3, echo time 1.21, a flip angle of 45°, an 8-mm slice thickness, a matrix of 256 × 256, a field of view ranging from 340 to 400 mm, and a voxel size of 2.0 × 1.3 × 8.0 mm.. For T2-weighted short-tau inversion recovery (T2w-STIR) imaging, a breath-hold black-blood, segmented turbo spin echo technique was adopted, using a triple inversion recovery ...
Acute pulmonary oedema has been described in individuals participating in three aquatic activities: (i) scuba diving; (ii) breath-hold diving; and (iii) endurance swimming. In this review, 60 published cases have been compiled for comparison. Variables considered included: age; past medical history; …
True Real-Time Cardiac MRI with Radial K-Space Sampling in Free Breathing without ECG-synchronization-Improved Image Quality with Iterative Image Reconstruction, SSC02-07, 12026589, Ralf Bauer,
As we all do, I went through my mental rolodex of solutions. I thought about using sedation - such as Ketamine or Versed - or using a paralytic, such as Succinylcholine. However, since the airway - although partially compromised - was at least functioning well enough, I decided against all these as I didnt want to make things worse.. Being the cautious person I am, I called for an anesthesiologist to come to the bedside. If things went well, I wouldnt need him, but if they didnt, we could both plead our cases to the jury.. Now the breath holding started...ours, that is.. When everything seemed ready and after saying a quick prayer under my breath, I had one nurse hold the childs body down and another hold the head. We did this without the comfort of sedation, so I wanted things to go seamlessly.. Using a laryngoscope with a mac blade, I put the blade in on the right side of the mouth and swept the tongue left. A glint of gold appeared, but disappeared as the child moved her tongue, and ...
These have probably developed from consonant clusters. DD: Clicks as you noted. Ancient, unknown date of origin, possibly derived from breath holding mannerisms. DM: What do you mean by "unusual breathing adaptations", and how many of these have been tested in other mammals, especially other apes? It is indeed interesting that our heart rate drops when we dive -- but we dont know if the same happens to a chimp, because chimps dont dive. Maybe we could convince an orang-utan to do it; they do go quite deep into water if they need to.. DD: Although uncertain, Id guess any great ape immersed would fill their laryngeal air sac with exhaled air and could not dive. DM: "Photic sneezing" means having to sneeze when looking into the sun, right? I dont have that, and I dont think its widespread, so I dont think its likely that any population of our ancestors all had it. On the other hand, how widespread is it beyond humans? Do any chimps have it?. DD: Darwin found no sun-frown and assumably no ...
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Fish can be a tricky son of a bitch to grill. Skin adheres to even the most well-oiled grill grates. Flesh flakes off into the fires below. And flipping the damn fillet creates a breath-holding moment where you pray the whole thing holds together. This is why most grillers give up on surf and stick to turf. Dont limit yourself. Theres a sea of protein to be had-you just need to pick the right fish.
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The former News of the World editor heads to the New York Daily News. Plus, Rupert Murdoch joins Twitter, and Alesha Dixon leaves Strictly for Britains Got Talent. With John Plunkett, Dan Sabbagh, Vicky Frost and Josh Halliday. ...
Describe an absolutely perfect kind of day for you. (The absolute best day ever. What are you doing, who are you sharing it with and who are you being?) Be as detailed as possible; what does it look like, sound like, feel like and what would you be saying to yourself if you achieved this perfect day ...
Deep inspiration breath-hold[edit]. Deep inspiration breath-hold (DIBH) is a method of delivering radiotherapy while limiting ... free-breathing breath-hold and spirometry-monitored deep inspiration breath hold.[80] ... "Deep Inspiration Breath-hold". Genesis Care. Retrieved 14 January 2016.. *^ a b "University of Alabama at Birmingham ... The technique involves a patient holding their breath during treatment. There are two basic methods of performing DIBH: ...
Holding your breath[edit]. Wouldn't holding your breath have the same effect? -Preceding unsigned comment added by 67.193.6.26 ... It would not be possible to hold one's breath for as long as it would be possible to asphixiate oneself for, nor could someone ... Question 2: If "Breath Control Play" is defined as such in this page, then what would be the act of sharing a breath with your ... In auto-erotic asphyxiation a person sometimes simply holds his/her breath during masturbation or sex.203.196.42.71 04:55, 31 ...
Snorkeling/breath-hold. *Spearfishing. *Underwater football. *Underwater hockey. *Underwater rugby. *Underwater target shooting ...
Snorkeling/breath-hold. *Spearfishing. *Underwater football. *Underwater hockey. *Underwater rugby. *Underwater target shooting ... "Carbon monoxide in breath in relation to smoking and carboxyhaemoglobin levels". Thorax. 36 (5): 366-69. doi:10.1136/thx.36.5. ...
Foege WH (March 5, 2003). "Holding our breath". MedGenMed. 5 (1): 11. PMID 12827072. Foege WH (December 18, 2003). "Polio and ... He has held various positions during his career: Director, Centers for Disease Control, 1977-1983 President, Co-Founder, The ...
Holding my breath. VOA Radiogram Official Site "Shortwave Radiogram Tumblr Site". swradiogram.net. Retrieved 2017-06-27. "Ancil ... "NBC Resources Held by the Recorded Sound Section." Library of Congress Chamberlain, A.B. "CBS International Broadcast ...
Snorkeling/breath-hold. *Spearfishing. *Underwater football. *Underwater hockey. *Underwater rugby. *Underwater target shooting ... Selected Pages from CHAPTER 8 and from Deaths Occurring Following the Application of Choke or Carotid Holds. www.charlydmiller. ... Such techniques are used either to tire the opponent or as complementary or distractive moves in combination with pinning holds ... 10] or sometimes even as submission holds. Examples of chest compression include the knee-on-stomach position; or techniques ...
Snorkeling/breath-hold. *Spearfishing. *Underwater football. *Underwater hockey. *Underwater rugby. *Underwater target shooting ... Texas Open Finswimming Invitational - An open finswimming competition held in Texas since 1999 ...
Snorkeling/breath-hold. *Spearfishing. *Underwater football. *Underwater hockey. *Underwater rugby. *Underwater target shooting ...
This is the reason why divers follow a procedure of not holding their breath during ascent. By breathing continuously, they ... Or, it may present dramatically, with unconsciousness, seizures, paralysis, shortness of breath, or death. Paraplegia is not ... they may suffer pulmonary embolism with shortness of breath and chest pain. It is often impossible to distinguish AGE from DCS ...
Azard Ali (December 10, 2012). "Cedros still holding breath". Trinidad and Tobago Newsday. Retrieved September 11, 2015. ...
Everyone holding his breath. I have always believed that Roose grew to his full height as a man in the purgatorial crisis of a ...
The Holding Our Breath EP followed in June 1991, reaching No. 52 in the UK Albums Chart, while the single "Catch the Breeze" ... "Holding Our Breath review". Allmusic. Retrieved 2009-08-22. Allmusic staff. "Shoegaze". Allmusic. Retrieved 2009-08-22. Watson ...
Harris, Gardiner (29 May 2015). "Holding Your Breath in India". New York Times. C. Arden Pope III, a professor of economics at ...
HARRIS, GARDINER (29 May 2015). "Holding Your Breath in India". SundayReview, New York Times. Retrieved 30 May 2015. " ...
I'm not holding my breath." The decision sparked much controversy about the scope of the mandatory detention laws. Along with ... John Fairfax Holdings. Zagor, Matthew (2006). "Uncertainty and exclusion: detention of aliens and the High Court". Federal Law ... Courts in Australia have also held that, generally, detention of non-citizens for immigration purposes is also valid. In this ... The case was argued alongside two other cases which also concerned immigration detention and hearings were held on 12 November ...
We were holding our breath. Then we found out it was bought with the intention to restore it as a motel, which is its best use ... Kevin Murphy (June 17, 2012). "Route 66 still holds allure for travellers, industry". Reuters. Hacker, John (2011-09-21). " ...
It is impossible to suppress the urge to breath to the point of hypoxia but training can increase the ability to breath-hold, ... 48-49 Parkes M (2006). "Breath-holding and its breakpoint". Exp Physiol. 91 (1): 1-15. doi:10.1113/expphysiol.2005.031625. PMID ... Lindholm, Peter; Lundgren, Claes EG (1 January 2009). "The physiology and pathophysiology of human breath-hold diving". Journal ... ISBN 978-1-60406-062-1. "Longest time breath held voluntarily (male)". Guinness World Records. Retrieved 2016-11-29. Michael ...
Museums Hold Their Breath". New York Times.. CS1 maint: ref=harv (link). ... The painting had been stolen by the Nazis and was one of several such stolen works held by the Leopold.[67][68] ... The committee's decision recommended that 16 Klimt drawings and 19 pieces of porcelain that had been held by Ferdinand and ... government archives were opened up to research into the provenance of works held by the government.[60][68] Hubertus Czernin, ...
Hyperventilation followed by prolonged breath-holding. This hyperventilation, attempted by some swimmers, reduces the amount of ... Respiration is controlled by centres in the medulla, which influence the rate of breathing and the depth of each breath. This ...
Glossopharyngeal breathing and breath-hold diving on empty lungs (PDF). Breath-hold diving. Proceedings of the Undersea and ... Laryngospasm in breath-hold diving (PDF). Breath-hold diving. Proceedings of the Undersea and Hyperbaric Medical Society/Divers ... loss of consciousness caused by cerebral hypoxia towards the end of a breath-hold dive Freediving blackout, breath-hold ... Development of the dan breath-hold incident database (PDF). Breath-hold diving. Proceedings of the Undersea and Hyperbaric ...
Similarly, a scuba diver ascending while holding their breath with their lungs fully inflated can cause air sacs (alveoli) to ... They can breathe on land and hold their breath underwater. The branchiostegal lungs are seen as a developmental adaptive stage ... The FRC always remains in the alveoli after a normal out-breath. With each breath only about 350 ml (i.e. less than 15%) of ... The opposite occurs after breath-holding. The partial pressures of oxygen and carbon dioxide in the arterial blood are measured ...
1997). "Oxygen-Enhanced Breath-hold Diving, Phase I: Hyperventilation and Carbon Dioxide Elimination". In: EJ Maney, Jr and CH ... He co-chaired the Undersea and Hyperbaric Medical Society / Divers Alert Network 2006 breath-hold workshop and co-edited the ... Lindholm P, Pollock NW, Lundgren CEG (2006). Breath-hold diving. Proceedings of the Undersea and Hyperbaric Medical Society/ ... Oxygen Enhanced Breath-Hold: Immersion and Temperature Effects". Pollock, Neal W; Hobbs, Gene W; Natoli, Michael J; Hendricks, ...
Physiological mechanisms involved in the risk of loss of consciousness during breath-hold diving (PDF). Breath-hold diving. ... up to the breath-hold breakpoint, at which the person can no longer voluntarily hold his or her breath. This typically occurs ... Breath holding in water should always be supervised by a second person, as by hyperventilating, one increases the risk of ... The person can voluntarily hold his or her breath for some time, but the breathing reflex will increase until the person tries ...
Breath-Hold Study. The effects of hyperventilation, work, breathing mixture and dive depth on immersed breath-hold duration ... Incidents and Accidents in Breath-Hold Diving. Both fatal and nonfatal cases are collected to identify risks and aid in public ... Physiology and pathophysiology of breath-hold in adults and children. Hypothermia and diving. Headache and diving. Blood ... Held May 1, 2004. Durham, N.C.:. Divers Alert Network. Retrieved 2011-01-15. Staff. "History of DAN". DAN Europe website. ...
He did this by calling attention to the future-Doctor in the opening scenes by having him wearing a fez and holding a mop, and ...

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