keyword
MENU ▼
Read by QxMD icon Read
search

Cardiopulmonary interactions

keyword
https://www.readbyqxmd.com/read/29236912/cardiorespiratory-performance-of-coronary-artery-disease-patients-on-land-versus-underwater-treadmill-tests-a-comparative-study
#1
Mauricio Koprowski Garcia, Limanara Rizzo, Paulo Yazbek-Júnior, Daniela Yutiyama, Fabiola Jomar da Silva, Denise Matheus, Luiz Eduardo Mastrocolla, Eduardo Massad
OBJECTIVE: To compare responses to a cardiopulmonary exercise test on land versus on an underwater treadmill, to assess the cardiorespiratory performance of coronary artery disease patients while immersed in warm water and to compare with the performance of healthy individuals. METHODS: The sample population consisted of 40 subjects, which included 20 coronary artery disease patients aged 63.7±8.89 years old, functional class I and II, according to the New York Hearth Association, and 20 healthy subjects aged 64...
November 2017: Clinics
https://www.readbyqxmd.com/read/29200138/dispatcher-assisted-cardiopulmonary-resuscitation-program-and-outcomes-after-pediatric-out-of-hospital-cardiac-arrest
#2
Yu Jin Lee, Kyoung Jun Song, Sang Do Shin, Seung Chul Lee, Eui Jung Lee, Young Sun Ro, Ki Ok Ahn
OBJECTIVES: A dispatcher-assisted bystander cardiopulmonary resuscitation (DA-BCPR) is expected to influence the outcomes of pediatric out-of-hospital cardiac arrest (OHCA). Our objective was to measure the effect size of a DA-BCPR on survival outcomes according to location of the event. METHODS: All emergency medical service treated OHCA patients younger than 19 years in Korea from January 2012 through December 2013 were analyzed. Patients with OHCA witnessed by emergency medical service providers and those with missing outcome information were excluded...
December 1, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/29199541/impact-of-temperature-on-the-narcotrend-index-during-hypothermic-cardiopulmonary-bypass-in-children-with-sevoflurane-anesthesia
#3
Nils Dennhardt, Christiane Beck, Dietmar Boethig, Sebastian Heiderich, Alexander Horke, Sebastian Tiedge, Martin Boehne, Robert Sümpelmann
BACKGROUND: During cardiopulmonary bypass (CPB) in children, anesthesia maintained by sevoflurane administered via the oxygenator is increasingly common. Anesthetic uptake and requirement may be influenced by the non-physiological conditions during hypothermic CPB. Narcotrend-processed EEG monitoring may, therefore, be useful to guide the administration of sevoflurane during this phase. OBJECTIVE: The objective of this prospective, clinical, observational study was to assess the correlation between body temperature, Narcotrend Index (NI) and administered sevoflurane in children during CPB...
December 1, 2017: Perfusion
https://www.readbyqxmd.com/read/29172364/an-update-on-current-resuscitation-council-uk-guidelines
#4
Sarah L McKernon, Laura Kaura, Kathryn H Taylor, Samantha Reid, Mary C Balmer
On 15 October 2015, The Resuscitation Council (UK) published new resuscitation guidelines following the review of resuscitation science by the International Liaison Committee on Resuscitation (ILCOR). The 2015 guidelines emphasize the importance of interactions between the emergency medical dispatcher, the bystander who provides cardiopulmonary resuscitation (CPR) and the prompt deployment of an automated external defibrillator (AED); the co-ordination of these three elements is crucial to improving out-of-hospital cardiac arrest survival...
April 2017: Dental Update
https://www.readbyqxmd.com/read/29080766/interaction-between-wolbachia-and-the-fibrinolytic-system-as-a-possible-pathological-mechanism-in-cardiopulmonary-dirofilariosis
#5
Alicia Diosdado, Paula Josefina Gómez, Rodrigo Morchón, Fernando Simón, Javier González-Miguel
Dirofilaria immitis is a mosquito-borne parasite that produces an inflammatory process in the wall of the blood vessels of its definitive host during cardiopulmonary dirofilariosis, known as proliferative endarteritis. Parasite antigens participate in the appearance of this inflammatory event, among other mechanisms through the over-activation of the host fibrinolytic system. Since Wolbachia, endosymbiont bacteria of filarial nematodes, is released into the vertebrate host when worms die, the aim of this work was to analyse the interaction between this bacteria and the host fibrinolytic system to complete the study of this part of the host-parasite relationships...
November 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/29060627/effects-of-septum-and-pericardium-on-heart-lung-interactions-in-a-cardiopulmonary-simulation-model
#6
Nikolaos Karamolegkos, Antonio Albanese, Nicolas W Chbat
Mechanical heart-lung interactions are often overlooked in clinical settings. However, their impact on cardiac function can be quite significant. Mechanistic physiology-based models can provide invaluable insights into such cardiorespiratory interactions, which occur not only under external mechanical ventilatory support but in normal physiology as well. In this work, we focus on the cardiac component of a previously developed mathematical model of the human cardiopulmonary system, aiming to improve the model's response to the intrathoracic pressure variations that are associated with the respiratory cycle...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29025008/cardiopulmonary-interactions-with-beta-blockers-and-inhaled-therapy-in-copd
#7
S Jabbal, W Anderson, P Short, A Morrison, A Manoharan, B J Lipworth
Background: Beta-blockers remain underused in patients with chronic obstructive pulmonary disease (COPD) and cardiovascular disease. Aim: We compared how different inhaled therapies affect tolerability of bisoprolol and carvedilol in moderate to severe COPD. Design: A randomized, open label, cross-over study. Methods: We compared the cardiopulmonary interactions of bisoprolol 5 mg qd or carvedilol 12.5 mg bid for 6 weeks in conjunction with: (i) triple: inhaled corticosteroid/long acting beta-agonist/long acting muscarinic antagonist (ICS + LABA + LAMA), (ii) dual: ICS + LABA and (iii) ICS alone...
July 24, 2017: QJM: Monthly Journal of the Association of Physicians
https://www.readbyqxmd.com/read/28993402/exercise-intolerance-in-hfpef-diagnosing-and-ranking-its-causes-using-personalized-o2-pathway-analysis
#8
Nicholas E Houstis, Aaron S Eisman, Paul P Pappagianopoulos, Luke Wooster, Cole S Bailey, Peter D Wagner, Gregory D Lewis
Background -Heart failure with preserved ejection fraction (HFpEF) is a common syndrome with a pressing shortage of therapies. Exercise intolerance is a cardinal symptom of HFpEF, yet its pathophysiology remains uncertain. Methods -We investigated the mechanism of exercise intolerance in each of 134 patients referred for cardiopulmonary exercise testing (CPET): 79 with HFpEF and 55 controls. We performed CPET with invasive monitoring to measure hemodynamics, blood gases, and gas exchange during exercise. We used these measurements to quantify 6 steps of oxygen transport and utilization (the "O2 pathway") in each HFpEF patient, identifying the defective steps that impair each one's exercise capacity (peak VO2)...
October 9, 2017: Circulation
https://www.readbyqxmd.com/read/28991109/patient-blood-management-in-pediatric-cardiac-surgery-a-review
#9
Jill M Cholette, David Faraoni, Susan M Goobie, Victor Ferraris, Nabil Hassan
Efforts to reduce blood product transfusions and adopt blood conservation strategies for infants and children undergoing cardiac surgical procedures are ongoing. Children typically receive red blood cell and coagulant blood products perioperatively for many reasons, including developmental alterations of their hemostatic system, and hemodilution and hypothermia with cardiopulmonary bypass that incites inflammation and coagulopathy and requires systemic anticoagulation. The complexity of their surgical procedures, complex cardiopulmonary interactions, and risk for inadequate oxygen delivery and postoperative bleeding further contribute to blood product utilization in this vulnerable population...
October 5, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28974059/predictor-of-fluid-responsiveness-in-the-grey-zone-augmented-pulse-pressure-variation-through-a-temporary-increase-in-tidal-volume
#10
J J Min, N-S Gil, J-H Lee, D K Ryu, C S Kim, S M Lee
Background: Pulse pressure variation (PPV) is widely used as a predictor of fluid responsiveness. However, a previous study has suggested a 'grey zone' between 9 and 13% in which PPV would be inconclusive to predict fluid responsiveness. Considering PPV is based on cardiopulmonary interactions, we evaluated whether an augmented PPV using a temporary increase in tidal volume (V T ) from 8 to 12 ml kg -1 has the predictability for fluid responsiveness in patients within the grey zone...
July 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28910330/quality-of-life-measures-predict-cardiovascular-health-and-physical-performance-in-chronic-renal-failure-patients
#11
A Rogan, K McCarthy, G McGregor, T Hamborg, G Evans, S Hewins, N Aldridge, S Fletcher, N Krishnan, R Higgins, D Zehnder, S M Ting
BACKGROUND: Patients with advanced chronic kidney disease (CKD) experience complex functional and structural changes of the cardiopulmonary and musculoskeletal system. This results in reduced exercise tolerance, quality of life and ultimately premature death. We investigated the relationship between subjective measures of health related quality of life and objective, standardised functional measures for cardiovascular and pulmonary health. METHODS: Between April 2010 and January 2013, 143 CKD stage-5 or CKD5d patients (age 46...
2017: PloS One
https://www.readbyqxmd.com/read/28890081/factors-associated-with-postoperative-atrial-fibrillation-and-other-adverse-events-after-cardiac-surgery
#12
Emmanuel Akintoye, Frank Sellke, Roberto Marchioli, Luigi Tavazzi, Dariush Mozaffarian
OBJECTIVE: The study objective was to evaluate the impact of various surgical characteristics and practices on the risk of postoperative atrial fibrillation and other adverse outcomes after cardiac surgery. METHODS: By using the prospectively collected data of patients who underwent cardiac surgery in 28 centers across the United States, Italy, and Argentina, the details of surgery characteristics were collected for each patient and the outcomes, including postoperative atrial fibrillation, major adverse cardiovascular events, and mortality...
August 16, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28877974/exertional-dyspnoea-in-pulmonary-arterial-hypertension
#13
Daniel Dumitrescu, Olivier Sitbon, Jason Weatherald, Luke S Howard
Dyspnoea is a principal presenting symptom in pulmonary arterial hypertension (PAH), and often the most distressing. The pathophysiology of PAH is relatively well understood, with the primary abnormality of pulmonary vascular disease resulting in a combination of impaired cardiac output on exercise and abnormal gas exchange, both contributing to increased ventilatory drive. However, increased ventilatory drive is not the sole explanation for the complex neurophysiological and neuropsychological symptom of dyspnoea, with other significant contributions from skeletal muscle reflexes, respiratory muscle function, and psychological and emotional status...
September 30, 2017: European Respiratory Review: An Official Journal of the European Respiratory Society
https://www.readbyqxmd.com/read/28814495/right-ventricular-pulmonary-vascular-interactions
#14
REVIEW
Diana M Tabima, Jennifer L Philip, Naomi C Chesler
Accurate and comprehensive evaluation of right ventricular (RV)-pulmonary vascular (PV) interactions is critical to the assessment of cardiopulmonary function, dysfunction, and failure. Here, we review methods of quantifying RV-PV interactions and experimental results from clinical trials as well as large- and small-animal models based on pressure-volume analysis. We conclude by outlining critical gaps in knowledge that should drive future studies.
September 2017: Physiology
https://www.readbyqxmd.com/read/28802909/variable-prognostic-value-of-blood-pressure-response-to-exercise
#15
Yuko Kato, Shinya Suzuki, Tokuhisa Uejima, Hiroaki Semba, Takeshi Yamashita
AIM: The aim of this study was to evaluate the impact of patient background including exercise capacity on the relationship between the blood pressure (BP) response to exercise and prognosis in patients visiting a cardiovascular hospital. METHODS: A total of 2134 patients who were referred to our hospital underwent symptom-limited maximal cardiopulmonary exercise testing, and were followed through medical records and mail. The BP response to exercise was defined as the difference between peak and rest systolic BP...
August 9, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/28763290/powered-air-purifying-respirator-use-in-healthcare-effects-on-thermal-sensations-and-comfort
#16
Jeffrey B Powell, Jung-Hyun Kim, Raymond J Roberge
Twelve subjects wore an N95 filtering facepiece respirator (N95 FFR), one tight-fitting full facepiece powered air-purifying respirator (PAPR), two loose-fitting PAPRs, and one elastomeric/PAPR hybrid for 1 hr each during treadmill walking at 5.6 km/h while undergoing physiological and subjective response monitoring. No significant interaction (p≥.05) was noted between the five respirators in heart rate, respiratory rate, oxygen saturation, transcutaneous carbon dioxide, and perceptions of breathing effort or discomfort, exertion, facial heat, and overall body heat...
August 1, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28729396/acute-volume-loading-exacerbates-direct-ventricular-interaction-in-a-model-of-copd
#17
William Spencer Cheyne, Alexandra Mackenzie Williams, Megan I Harper, Neil Derek Eves
Volume loading increases left ventricular (LV) stroke volume (LVSV) through series interaction but may paradoxically reduce LVSV in the presence of large increases in right ventricular (RV) afterload due to direct ventricular interaction (DVI). RV afterload is often increased in COPD as a result of pathological changes to respiratory mechanics, namely increased negative intrathoracic pressure (nITP), dynamic lung hyperinflation (DH) and increased pulmonary vascular resistance (PVR). These hallmarks of COPD negatively impact LV hemodynamics in normovolemia...
July 20, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28727673/exercise-training-improves-ventilatory-efficiency-in-patients-with-a-small-abdominal-aortic-aneurysm-a-randomized-controlled-study
#18
Ricardo M Lima, Baruch Vainshelboim, Rucha Ganatra, Ronald Dalman, Khin Chan, Jonathan Myers
PURPOSE: To investigate the effects of exercise training on ventilatory efficiency and physiological responses to submaximal exercise in subjects with small abdominal aortic aneurysm (AAA). METHODS: Sixty-five male patients (72.3 ± 7.0 years) were randomized to exercise training (n = 33) or usual care group (n = 32). Exercise subjects participated in a training groups for 3 mo. Cardiopulmonary exercise testing was performed before and after the study period and peak VO2, the ventilatory threshold (VT), the oxygen uptake efficiency slope (OUES), and the VE2/VCO2 slope were identified...
July 19, 2017: Journal of Cardiopulmonary Rehabilitation and Prevention
https://www.readbyqxmd.com/read/28706270/comprehensive-multi-dimensional-mri-for-the-simultaneous-assessment-of-cardiopulmonary-anatomy-and-physiology
#19
Joseph Y Cheng, Tao Zhang, Marcus T Alley, Martin Uecker, Michael Lustig, John M Pauly, Shreyas S Vasanawala
Diagnostic testing often assesses the cardiovascular or respiratory systems in isolation, ignoring the major pathophysiologic interactions between the systems in many diseases. When both systems are assessed currently, multiple modalities are utilized in costly fashion with burdensome logistics and decreased accessibility. Thus, we have developed a new acquisition and reconstruction paradigm using the flexibility of MRI to enable a comprehensive exam from a single 5-15 min scan. We constructed a compressive-sensing approach to pseudo-randomly acquire highly subsampled, multi-dimensionally-encoded and time-stamped data from which we reconstruct volumetric cardiac and respiratory motion phases, contrast-agent dynamics, and blood flow velocity fields...
July 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28679570/cardiopulmonary-physiology-why-the-heart-and-lungs-are-inextricably-linked
#20
REVIEW
Kevin Verhoeff, Jamie R Mitchell
Because the heart and lungs are confined within the thoracic cavity, understanding their interactions is integral for studying each system. Such interactions include changes in external constraint to the heart, blood volume redistribution (venous return), direct ventricular interaction (DVI), and left ventricular (LV) afterload. During mechanical ventilation, these interactions can be amplified and result in reduced cardiac output. For example, increased intrathoracic pressure associated with mechanical ventilation can increase external constraint and limit ventricular diastolic filling and, therefore, output...
September 1, 2017: Advances in Physiology Education
keyword
keyword
52749
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"