نتایج جستجو برای: pulmonary circulation

تعداد نتایج: 310371  

Journal: :The Yale Journal of Biology and Medicine 1961
Frank D. Gray

This small book consists of a series of papers dealing with various aspects of hemodynamics in the macro-circulation of the lungs. The papers have little to say about the micro-circulation or the structure of the vessels themselves. Each paper is followed by a spirited discussion which proves to be a salubrious force against bias. The study group includes some of the most able and experienced i...

2017
Amanda Hauck Nicolas Porta Steve Lestrud Stuart Berger

In recent decades, survival of children with complex congenital heart disease has improved considerably. Specifically, children with a variety of congenital heart defects resulting in 'single ventricle' physiology can now undergo palliative surgery that allows survival beyond the neonatal period, and in many cases into adulthood, despite having a single functional ventricular pumping chamber su...

Journal: :Comprehensive Physiology 2012
Robert Naeije N Chesler

The pulmonary circulation is a high-flow and low-pressure circuit, with an average resistance of 1 mmHg/min/L in young adults, increasing to 2.5 mmHg/min/L over four to six decades of life. Pulmonary vascular mechanics at exercise are best described by distensible models. Exercise does not appear to affect the time constant of the pulmonary circulation or the longitudinal distribution of resist...

Journal: :Postgraduate medical journal 1974
J M Leigh

The pulmonary circuit receives the whole of the cardiac output, and the flow through it is governed by events in the systemic circulation. Its function is gaseous exchange, and the low resistance and high capacitance of the circuit is subservient to this function. Local flow is affected by intra-alveolar oxygen tensions and regional flow by passive hydrostatic effects due to gravity. The distri...

احمدی سودجانی, سیده صغری, احمدی, علی, عطایی کجویی, معصومه, فکری, کیاوش, ملک احمدی, محمدرضا,

Background and purpose: Increased pressure in the pulmonary circulation is of the major factors causing cardiac disorders in patients with thalassemia. The aim of this study was to investigate the relationship between splenectomy and pulmonary arterial pressure in individuals with beta- thalassemia major. Materials and methods: A cross-sectional study was carried out in patients with beta- t...

Journal: :European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery 2000
P Massoudy S Zahler P Tassani B F Becker J A Richter M Pfauder R Lange H Meisner

OBJECTIVE We have recently shown that a considerable amount of pro-inflammatory cytokines is released during pulmonary passage after aortic declamping in patients undergoing coronary artery bypass grafting. The present study was performed to investigate whether bilateral extracorporeal circulation with the lungs as oxygenators can reduce the inflammatory responses of the lungs. METHODS Eighte...

Journal: :روش های عددی در مهندسی (استقلال) 0
مهدی نعمت بخش m. nematbakhsh سعید جانی s. jani محمد صادق صادقی پور و سعیدنوری خراسانی m.s. sadeghipoor and s. noori-khorasani

the excess accumulation of water in lung interstitial or alveolar is called pulmonary edema which is caused by factors that upset the normal starling balance in micro-circulation. pulmonary edema disturbs the alveolar gas exchanges which are normally regulated by the respiratory system. mathematical modelling of pulmonary edema may help to predict the lung conditions and the mechanisms involved...

Journal: :Pediatrics in review 1999
S H Abman

1. Describe the factors that modulate the transition of pulmonary circulation from in utero to after birth. 2. Delineate temporal changes in pulmonary vascular resistance during fetal life. 3. List the substances that play a role in vasoregulation of normal fetal pulmonary circulation. 4. Delineate the role of nitric oxide in increasing pulmonary blood flow at birth. 5. Describe the common phys...

2015
Sophie Bertaud Tarique Hussain Gerald F Greil Mohamed S Nassar

Background Evidence suggests that the anatomical characteristics of the Fontan circulation, in particular the size of the pulmonary arteries, play a key role in the hemodynamic efficiency of the circulation and consequently, patient outcome. Understanding and optimizing early growth of the pulmonary arteries is crucial to avoid later increase in pulmonary vascular resistance, a major risk facto...

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