نتایج جستجو برای: lead block
تعداد نتایج: 491706 فیلتر نتایج به سال:
We present the case of a 55-year-old male who presented with symptoms of dyspnoea and pre-syncope. A 12 lead electrocardiogram demonstrated extensive conduction abnormalities with 2:1 heart block, right bundle branch block and a small Q wave in lead V(1.) This indicated significant myocardial and septal involvement. Echocardiography confirmed the presence of right ventricular infiltration and d...
The Idaho Division of Public Health conducted a pilot study to produce a lead-exposure-risk map to help local and state agencies better target childhood lead-screening efforts. Priority lead-screening areas, at the block group level, were created by using county tax assessor data and geographic information system software. A series of maps were produced, indicating childhood lead-screening prev...
We synthesize a series of block copolymers comprising a polystyrene (PS) block and an imidazolium-functionalized PS (IL) block and characterize their assembly properties. We use small-angle neutron scattering and dynamic light scattering to determine the micelle size and shape in dilute solutions and to assess the micelle interactions in concentrated solutions. By studying a series of copolymer...
امروزه چرخدنده های پلیمری جایگاه خاصی را در کاربردهای انتقال حرکت به خود اختصاص داده است. سبکی وزن، قیمت تمام شده پایین، مقاومت مناسب در شرایط محیطی خورنده و توانایی انتقال دور بدون نیاز به روانکار خارجی از جمله مزایای چرخدنده های پلیمری به شمار می آید. اساسی ترین محدویت این نوع چرخدنده ها در مقایسه با چرخدنده های فلزی، محدودیت در خواص مکانیکی و همچنین پایداری ابعادی آنها در شرایط دمایی مختلف م...
High defibrillation threshold (DFT) and defibrillation failure can lead to intractable ventricular arrhythmias. Additional coronary sinus coil is an effective strategy to achieve marked reduction in DFT. However, physicians should retain this might prevent future coronary sinus lead placement in case the patient would develop complete left bundle branch block.
Lately, great concern in image processing is devoted to region-oriented methods. Region-oriented image representation offers several advantages over block-oriented approach, e.g. adaptation to the local image characteristics. New algorithms are necessary for image coding, if we work with arbitrarily shaped image regions, called segments, instead on rectangular blocks. The original approach for ...
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