نتایج جستجو برای: lad

تعداد نتایج: 3976  

Journal: :Journal of the American College of Cardiology 2020

Journal: :Cultural Studies Review 2013

Introduction: Although left anterior descending (LAD) artery supplies a large portion of the myocardium, the amount of blood supply provided by LAD is depended on the length of the LAD. The aim of the current study was to evaluate the association between coronary artery dominance and LAD anatomic types in patients with normal epicardial coronary arteries. Methods:...

ژورنال: :مجله دانشگاه علوم پزشکی ایلام 0
بهرام یغمایی bahram yaghmai فرج الله ملکی faraj allah maleki

چکیده مقدمه: آترواسکلروزیس یکی از علل عمده مرگ و میر در کشورهای پیشرفته است. در گذشته، محققین زیادی ثابت نموده اند که فاکتورهایی از قبیل سیگار کشیدن، میزان کلسترول خون و فشار خون نقش مهمی در پاتوژنز بیماریهای قلبی عروقی دارند. تحقیقات برای اتیولوژی بیماری به این ایده منجر گردیده است که ممکن است عناصر کمیاب در شروع و یا پیشرفت بیماری آترواسکلروزیس نقش داشته باشند. ثابت شده است که عناصر کمیاب نقش...

2015

Metody przeszukiwania w przestrzeni stanów sformu lowane by ly w postaci dość ogólnej, jednak wymaga ly reprezentacji zagadnienia we w laściwej formie, tzn. przestrzeni stanów, zbioru operatorów, a dodatkowo przydatna/potrzebna by la informacja heurystyczna w formie funkcji oceny stanów. Ogólnie, format i sposób reprezentacji wiedzy o zagadnieniu sa֒ niezwykle istotne i maja֒ bezpośredni wp lyw n...

Journal: :CoRR 2011
Fuxi Wen Boon Poh Ng

In this paper, the l1 norm penalty on the filter coefficients is incorporated in the least mean absolute deviation (LAD) algorithm to improve the performance of the LAD algorithm. The performance of LAD, zero-attracting LAD (ZA-LAD) and reweighted zero-attracting LAD (RZA-LAD) are evaluated for linear time varying system identification under the non-Gaussian (α-stable) noise environments. Effec...

2010
Dawod Sharif Amal Sharif-Rasslan Camilia Shahla Edward G Abinader

In the presence of severe stenosis, coronary artery flow may be reduced at rest. Recent advances in echocardiography have made non-invasive sampling of velocities in the left anterior descending coronary artery (LAD) possible. The aim of our study was to evaluate feasibility and capability of transthoracic Doppler to detect severe stenosis of the LAD. The study population consisted of 42 subjec...

2017
Abhishek Prasad Shradha Sinha Rahat Brar Shaleen Rana

A 50‐year‐old gentleman was referred to our department for computed tomography (CT) coronary angiography with complaints of pain on the left side of the chest and cold sweats since 4 days. CT coronary angiography, done on a 64‐slice CT (Somatom Sensation‐64, Erlangen, Germany), showed evidence of dual LAD. The short LAD was arising from the left main coronary artery and coursing in the proximal...

Journal: :Interactive cardiovascular and thoracic surgery 2011
Nikolaos Tsirikos Karapanos Scott H Suddendorf Zhuo Li Marianne Huebner Lyle D Joyce Soon J Park

To determine the impact of left anterior descending-competitive flow (LAD-CF) on distal coronary flow (LAD-DF) and on left internal mammary artery-graft flow (LIMA-GF), we performed a quantitative blood-flow analysis in a swine model of a LIMA-to-LAD coronary artery bypass graft (CABG). In six swine, a LIMA-to-LAD CABG was performed. LAD blood-flow was measured bilaterally to the LIMA-to-LAD an...

Journal: :Journal of the American College of Cardiology 2005
Francesco Pizzuto Paolo Voci Enrica Mariano Paolo Emilio Puddu Alessandro Aprile Francesco Romeo

OBJECTIVES The purpose of this study was to evaluate which Doppler-derived flow index best predicts new distal left anterior descending coronary artery (LAD) stenosis in patients with left internal mammary artery (LIMA) graft. BACKGROUND The LIMA flow measurement has been proposed to assess graft function, but it may be misleading in case of new distal LAD stenosis and/or competitive flow fro...

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