The two current criteria for diagnosis of left anterior fascicular block (LAFB) were evaluated; they are marked left axis deviation (LAD) and a delay in the time of inscription of the intrinsicoid deflection (ID) in lead aVL asynchronous to V6. From 400 electrocardiograms with a LAD of --30 degrees or greater, 62 percent showed asynchronous activation of the left ventricle. There was only a gen...

I magine a society with perfect economic equality. Perhaps out of sheer coincidence, the supply and demand for different types of labor happen to produce an equilibrium in which everyone earns exactly the same income. As a result, no one worries about the gap between the rich and poor, and no one debates to what extent public policy should make income redistribution a priority. Because people e...

That tired Ten-Percent claim pops up all the time. Last year, national magazine ads for U.S. Satellite Broadcasting showed a drawing of a brain. Under it was the caption, "You only use 11 percent of its potential." Well, they're a little closer than the ten-percent figure, but still off by about 89 percent. In July 1998, ABC television ran promotional spots for "The Secret Lives of Men," one of...

An information retrieval performance measure that is interpreted as the percent of perfect performance (PPP) can be used to study the effects of the inclusion of specific document features or feature classes or techniques in an information retrieval system. Using this, one can measure the relative quality of a new ranking algorithm, the result of incorporating specific types of metadata or folk...

Between 1970 and 1980, the percentage of hospitals with one or more collective bargaining contracts increased from 15.7 percent to 27.4 percent. A substantial amount of variation exists in the extent of unionism on the basis of hospital ownership, bed size, and location. Employees are more likely to organize when hospitals in the State are regulated by a mandatory rate-setting program. Unions r...

Studies of the epidemiology of stroke have greatly improved over the past 20 years because of 1) the development of new technology that improved classification of specific types of stroke (1), 2) better therapies that have reduced case fatality (1), 3) prevention of stroke (i.e., antihypertensive drug therapy) (1), and 4) health insurance, especially Medicare. Stroke cases can now be classified...