نتایج جستجو برای: روش vf

تعداد نتایج: 373500  

2013
Katie Goodwin Catriona Syme Michal Abrahamowicz Gabriel T. Leonard Louis Richer Michel Perron Suzanne Veillette Daniel Gaudet Tomas Paus Zdenka Pausova

OBJECTIVE Visceral fat (VF) increases cardiometabolic risk more than fat stored subcutaneously. Here, we investigated how well routine clinical measures of adiposity, namely body mass index (BMI) and waist circumference (waist), predict VF and subcutaneous fat (SF) in a large population-based sample of adolescents. As body-fat distribution differs between males and females, we performed these a...

Journal: :Circulation. Arrhythmia and electrophysiology 2012
Ignatius Gerardo E Zarraga Cynthia M Dougherty Karen S MacMurdy Merritt H Raitt

BACKGROUND Previous studies have suggested that aldosterone blockade can reduce the incidence of ventricular tachycardia (VT) or ventricular fibrillation (VF) in patients with heart failure. The SPIronolactone to Reduce ICD Therapy (SPIRIT) trial was designed to test the hypothesis that spironolactone reduces the incidence of VT/VF in patients with implantable cardioverter-defibrillators (ICDs)...

2013
Yae Min Park Hyun Soo Lee Ra Seung Lim Jong-Il Choi Hong Euy Lim Sang Weon Park In Suck Choi Young-Hoon Kim

BACKGROUND AND OBJECTIVES Ventricular fibrillation (VF) can inadvertently occur during electrophysiologic study (EPS) or catheter ablation. We investigated the incidence, cause, and progress of inadvertently developed VF during EPS and catheter ablation. SUBJECTS AND METHODS We reviewed patients who had developed inadvertent VF during EPS or catheter ablation. Patients who developed VF during...

2013
Nai-Wen Fan De-Kuang Hwang Yu-Chieh Ko Fan-Chen Tseng Kuo-Hsuan Hung Catherine Jui-Ling Liu

PURPOSE To investigate risk factors associated with progressive visual field (VF) loss in primary angle closure glaucoma (PACG). METHODS We retrospectively reviewed medical record of PACG patients who had ≥5 reliable VF examinations (central 24-2 threshold test, Humphrey Field Analyzer) and ≥2 years of follow-up. Each VF was scored using Collaborative Initial Glaucoma Treatment Study system. ...

Journal: :Investigative ophthalmology & visual science 2017
Won June Lee Young Kook Kim Jin Wook Jeoung Ki Ho Park

Purpose To determine the usefulness of swept-source optical coherence tomography (SS-OCT) probability maps in detecting locations with significant reduction in visual field (VF) sensitivity or predicting future VF changes, in patients with classically defined preperimetric glaucoma (PPG). Methods Of 43 PPG patients, 43 eyes were followed-up on every 6 months for at least 2 years were analyzed...

Journal: :Circulation research 1999
M L Riccio M L Koller R F Gilmour

Despite recent advances in our understanding of the mechanism for ventricular fibrillation (VF), important electrophysiological aspects of the development of VF still are poorly defined. It has been suggested that the onset of VF involves the disintegration of a single spiral wave into many self-perpetuating waves. It has been further suggested that such a process requires that the slope of the...

2004
Christian E Zaugg

Based on recent experimental studies, this review article introduces the novel concept that cardiomyocyte Ca2+ and ventricular fibrillation (VF) are mutually related, forming a self-maintaining vicious circle in the initiation, maintenance, and termination of VF. On the one hand, elevated myocyte Ca2+ can cause delayed afterdepolarizations, triggered activity, and consequently life-threatening ...

Journal: :Behaviour research and therapy 2010
Elizabeth M J Orr David A Moscovitch

Video feedback (VF) with cognitive preparation (CP) has been widely integrated into cognitive-behavioral therapy (CBT) protocols for social anxiety disorder (SAD) due to its presumed efficacy in improving negative self-perception. However, previous experimental studies have demonstrated that improvements in negative self-perception via VF+CP do not typically facilitate anxiety reduction during ...

Journal: :Journal of biomechanics 2015
Pinaki Bhattacharya Jordan E Kelleher Thomas Siegmund

New studies show that the elastic properties of the vocal folds (VFs) vary locally. In particular strong gradients exist in the distribution of elastic modulus along the length of the VF ligament, which is an important load-bearing constituent of the VF tissue. There is further evidence that changes in VF health are associated with alterations in modulus gradients. The role of VF modulus gradat...

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