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OBJECTIVES This multicenter study compared the efficacy and safety of ibutilide versus procainamide for conversion of recent-onset atrial flutter or fibrillation. BACKGROUND Ibutilide fumarate is an intravenous (IV) class III antiarrhythmic agent that has been shown to be significantly more effective than placebo in the pharmacologic conversion of atrial(More)
A modeling approach that assesses impacts of alternative management decisions prior to field implementation would reduce decision-making risk for rangeland and livestock production system managers. However, the accuracy and functionality of models should be verified before they are used as decision-making tools. The goal of this study was to evaluate the(More)
Branching fractions in the dissociative recombination of NH4 and NH + 2 molecular ions with electrons were measured using the CRYRING heavy ion storage ring. We have determined complete branching fractions for NH4 at 0 eV and 2 meV collision energies, and at 0 eV collision energy for NH2 . We found the dissociative recombination of NH4 to be dominated by(More)
We compared agreement between creatinine clearance values in obese, critically ill patients calculated using three common empirically derived formulas and modifications thereof, with creatinine clearance obtained by conventional 24-hour urine collection. We selected the charts of 22 patients in intensive care units (86% medical, 14% surgical) according to(More)
BACKGROUND A study was conducted to determine the efficacy and safety of ibutilide fumarate versus placebo in the acute termination of atrial flutter and fibrillation. METHODS AND RESULTS Two hundred sixty-two patients aged 28 to 88 years with atrial flutter or fibrillation duration of 3 hours to 90 days were randomly assigned in a 5:1 ratio(More)
This paper presents the first dissociative recombination (DR) measurement of electrons with rotationally and vibrationally cold H3 + ions. A dc discharge pinhole supersonic jet source was developed and characterized using infrared cavity ringdown spectroscopy before installation on the CRYRING ion storage ring for the DR measurements. Rotational state(More)
The H3+ molecular ion plays a fundamental role in interstellar chemistry, as it initiates a network of chemical reactions that produce many molecules. In dense interstellar clouds, the H3+ abundance is understood using a simple chemical model, from which observations of H3+ yield valuable estimates of cloud path length, density and temperature. But(More)
*James C. Ascough II, Marvin J. Shaffer, Gregory S. McMaster, Gale H. Dunn, Lajpat R. Ahuja, and Mark A. Weltz, USDA-ARS-NPA, Great Plains Systems Research Unit, 301 S. Howes St., P.O. Box E, Fort Collins, CO 80522; Dana L. Hoag, Colorado State University, Department of Agricultural and Resource Economics, Fort Collins, CO 80523; *Corresponding Author:(More)
We present dissociative recombination measurements, using the CRYRING ion storage ring, of H3 ions produced in a supersonic expansion discharge source. Before and after the CRYRING measurements, the ion source was characterized in Berkeley using infrared cavity ringdown spectroscopy, and was found to exhibit a typical rotational temperature of ∼ 30 K. Our(More)
Absolute total cross sections for electron-impact excitation of the Be-like C , N and O ions have been measured near threshold using the merged electron-ion beams energyloss (MEIBEL) technique and calculated using a close-coupling R-matrix (CCR) approach. The 2s S 2s2p P dipole-allowed transition from the ground state was investigated for all three ions and(More)