نتایج جستجو برای: vectorcardiography
تعداد نتایج: 2752 فیلتر نتایج به سال:
Current optimization of atrioventricular (AV) and interventricular (VV) intervals in cardiac resynchronization therapy (CRT) is time consuming and subject to noise. We aimed to prove the principle that the best hemodynamic effect of CRT is achieved by cancelation of opposing electrical forces, detectable from the QRS morphology in the 3D vectorcardiogram (VCG). Different degrees of left (LV) an...
Component contrast is an essential element in computing spatio-temporal motion energy, and has been shown to bias perceived motion (Thompson, 1982). More recently, Champion, Hammett, and Thompson (2007) concluded that two-dimensional features in the stimulus was the explanation for this motion bias. Here a method was used that eliminated two-dimensional features as the source of the bias. Bowns...
Turner, O.B.E., M.A., M.D., F.R.GP., F.R.C.P.E. (Pp. viii + 155; figs. 177. 20s.) Edinburgh and London: E. & S. Livingstone, 1963. THIS book is a collection of articles on "Clinical Electrocardiography in General Practice" published by the author in the Practitioner in 1962. It is intended for those who wish to learn some of the elementary principles of a complicated subject. The value and limi...
The polarcardiographic responses to exercise in normal men, young and middle-aged, have been compared with those of men who show ischemic responses on the electrocardiogram. Changes in the ST-vectors are the most significant. These changes have been reduced to a single numerical quantity based on the spatial magnitude of the vector at the end of the QRS complex and the spatial direction of a ve...
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