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Cardiology Carvedilol or Metoprolol European Trial. A trial comparing carvedilol and immediate release metoprolol tartrate on clinical outcome in patients with moderate to severe heart failure
Conclusion Cardiovascular deaths occurred in 29% of carvedilol patients and in 35% of metoprolol patients
ENT Combined microscopic & endoscopic technique. An alternative to the technically demanding endoscopic sinus surgery for chronic sinus diseases, a technique which allows less experienced operators to manage these diseases with fewer complications
References in periodicals archive ?
By assuming the inner Oort Cloud as the only source of long-period comets, they were able to estimate the highest possible number of comets in the inner Oort Cloud.
Long-period comets can be difficult to watch and understand in part because they take at least 200 years for each orbit around the sun, and sometimes can take thousands or millions of years.
This interaction randomizes inclinations and orbits of Oort Cloud objects over time, and it causes some of them to be lost into interstellar space while others are thrown back into the planetary arena to be observed as long-period comets.
Brown's team suggests that Sedna is part of the cloud of frigid debris that the Dutch astronomer Jan Oort predicted 54 years ago to be a source of long-period comets with orbits that span millennia.
In that case, 1992 QB1 may have been ejected from a far more distant -- and still hypothetical -- reservoir of long-period comets called the Oort cloud.
Long-period comets (orbital period P > 200 yr) typical discovery rate per year for new comets: 6 semi major axes: [10.
Dutch astronomer Jan Oort (1900-1992) inferred its existence in 1950, based on the observation that the orbits of long-period comets (those with periods greater than 200 years) are large and randomly oriented in the sky.