Ischemia at a distance
نویسندگان
چکیده
منابع مشابه
Comment Ischemia at a Distance - So Close Yet So Far
ST segment elevation in characteristic electrocardiographic leads during an acute myocardial infarction generally allows correct identification of the coronary artery occluded (1). Electrocardiographic changes, usually ST segment depression, are often noted in other leads, presumably representing myocardium sub served by other coronary arteries. What do such changes mean? Are they a benign elec...
متن کاملIschemia at a distance after acute myocardial infarction: a cause of early postinfarction angina.
Whether an acute myocardial infarction due to occlusion of one major coronary artery can cause ischemia in the distribution of a second narrowed coronary artery by the mechanism of collateral interruption (i.e., ischemia at a distance) is not known. To study this, we reviewed 128 consecutively autopsied patients with acute fatal myocardial infarcts and identified 20 patients in whom angina, ass...
متن کاملComputation at a Distance
We consider a model of computation motivated by possible limitations on quantum computers. We have a linear array of n wires, and we may perform operations only on pairs of adjacent wires. Our goal is to build a circuits that perform specified operations spanning all n wires. We show that the natural lower bound of n− 1 on circuit depth is nearly tight for a variety of problems, and we prove li...
متن کاملDesign at a distance
The Open University has been teaching design at a distance for three decades. In this time delivery mechanisms have changed from non-interactive broadcasts to interactive media. A new generation of courses is emerging taught entirely online. This offers many challenges and opportunities This paper describes three tools that will be used in a new, level 1 course. Knowledge mapping, animated scre...
متن کاملComparison at a distance.
The visual system is known to contain hard-wired mechanisms that compare the values of a given stimulus attribute at adjacent positions in the visual field; but how are comparisons performed when the stimuli are not adjacent? We ask empirically how well a human observer can compare two stimuli that are separated in the visual field. For the stimulus attributes of spatial frequency, contrast, an...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the American College of Cardiology
سال: 1986
ISSN: 0735-1097
DOI: 10.1016/s0735-1097(86)80068-7