نتایج جستجو برای: atria

تعداد نتایج: 3555  

2013
Keiichi Ito Taro Date Masahiro Ikegami Kenichi Hongo Masami Fujisaki Daisuke Katoh Takuya Yoshino Ryuko Anzawa Tomohisa Nagoshi Seigo Yamashita Keiichi Inada Seiichiro Matsuo Teiichi Yamane Michihiro Yoshimura

OBJECTIVE Thrombin, the final coagulation product of the coagulation cascade, has been demonstrated to have many physiological effects, including pro-fibrotic actions via protease-activated receptor (PAR)-1. Recent investigations have demonstrated that activation of the cardiac local coagulation system was associated with atrial fibrillation. However, the distribution of thrombin in the heart, ...

Journal: :Physiological reports 2015
Sigurd Hartnett Hongbo Gao Sabrina Schnack Yifan Li

Suppressed parasympathetic function is commonly present in cardiovascular diseases, aging, obesity, and various other health conditions. Impaired parasympathetic action is known as a detrimental factor and contributes to the adverse outcomes in these conditions. However, the underlying mechanisms remain to be fully addressed. In this study, using high-fat diet (HFD)-induced obese mice as a mode...

Journal: :Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology 2005
Amy M Goodman Robert A Oliver Craig S Henriquez Patrick D Wolf

AIMS Contemporary ionic-based membrane models are computationally expensive and are not intended to match the properties of a given experimental preparation. The aim of this work was to use measured restitution properties of electrically remodelled atrial tissue to develop a simplified membrane model based on the Fenton-Karma (FK) equations amenable to large-scale simulation of chronic atrial f...

Journal: :Developmental biology 2011
Nicolas Bertrand Marine Roux Lucile Ryckebüsch Karen Niederreither Pascal Dollé Anne Moon Mario Capecchi Stéphane Zaffran

Much of the heart, including the atria, right ventricle and outflow tract (OFT) is derived from a progenitor cell population termed the second heart field (SHF) that contributes progressively to the embryonic heart during cardiac looping. Several studies have revealed anterior-posterior patterning of the SHF, since the anterior region (anterior heart field) contributes to right ventricular and ...

Journal: :Korean journal of otorhinolaryngology-head and neck surgery 2023

Myxoma most commonly occurs in the atria, but is rare nasal cavity. A 58-year-old male patient presented with a mass. We used endoscopic endonasal approach for treatment, and was finally diagnosed ala myxoma. report here case of myxoma along literature review.

Journal: :Circulation. Arrhythmia and electrophysiology 2015
Jichao Zhao Brian J Hansen Thomas A Csepe Praise Lim Yufeng Wang Michelle Williams Peter J Mohler Paul M L Janssen Raul Weiss John D Hummel Vadim V Fedorov

A trial fibrillation (AF) is one of the most common arrhyth-mias, but its mechanisms remain unclear because of the complex human atrial structure and pathology of this disease. 3 and 3-dimensional (3D) structural imaging of the atria in ex vivo animal models 4 have provided a wealth of information for better understanding of AF. 1 However, these high-resolution techniques cannot currently be pe...

Journal: :Archives of disease in childhood 1989
I D Sullivan J F Taylor

Nature of the problem Many congenital cardiac malformations result in a heart with only one effective ventricle. In most of these there is a second ventricle present, but it is too small to sustain cardiac output making construction of a biventricular circulation impossible. These hearts may be classified according to the atrioven-tricular connection. There are two possibilities: the atria are ...

Journal: :E3S web of conferences 2022

Natural ventilation (NV) is an effective energy-saving strategy to remove the excessive heat in high-rise atria. The traditional NV system atria has inlet openings at bottom and outlet top. However, this may bring fire safety concerns due rapid spread of smoke during atrium fire. To concern, a new was proposed study. This applies segmentation slab divide into upper lower parts, which can limit ...

Journal: :American journal of physiology. Heart and circulatory physiology 2007
Norihiko Ono Hideki Hayashi Ayaka Kawase Shien-Fong Lin Hongmei Li James N Weiss Peng-Sheng Chen Hrayr S Karagueuzian

Aging and glycolytic inhibition (GI) are known to alter intracellular calcium ion (Ca(i)(2+)) handling in cardiac myocytes, causing early afterpotentials (EADs) and delayed afterpotentials. We hypothesized that aging and GI interact synergistically in intact hearts to generate EADs and triggered activity leading to atrial fibrillation (AF). We studied isolated and Langendorff-perfused hearts of...

Journal: :Architectural Science Review 2021

How do people explore multiplex environments? What role atria play in spatial navigation? These are critical questions for architectural design. However, few studies have examined the visitors’ exploration of museums. Consequently, relationship between free and design museums is not well understood. A pilot study Ashmolean Museum indicated that influence navigation. The Museum, therefore, lends...

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