Librarian Contributions to a Regional Response in the COVID-19 Pandemic in Western North Carolina.

At the start of the COVID-19 pandemic, the Mountain Area Health Education Center formed a response team with the goal of building capacity across Western North Carolina health systems to collectively identify needs, coordinate resources to fill gaps, and strategically manage the regional threats of the pandemic. The library team collaborated on interprofessional projects by gathering information and using LibGuides to quickly and easily organize and share resources. The team met challenges, including moving to telecommuting, balancing a growing workload, and navigating a changing information landscape, and in doing so, strengthened relationships across the organization and the region.

Organization of myocardial activation during ventricular fibrillation after myocardial infarction: evidence for sustained high-frequency sources.

Background: Studies of ventricular fibrillation (VF) in small mammals have revealed localized sustained stationary reentry. However, studies in large mammals with surface mapping techniques have demonstrated only relatively short-lived rotors. The purpose of this study was to identify whether sustained high-frequency activation with low beat-to-beat variability was present at intramural sites in a postinfarct ovine model of VF.

Value of noncontact mapping for identifying left ventricular scar in an ovine model.

Background: We assessed the hypothesis that "virtual electrograms" from a noncontact mapping system (EnSite 3000) could be used to localize myocardial scar.

Methods And Results: Myocardial infarctions were induced in sheep by inflating an angioplasty balloon in the left anterior descending coronary artery for 3 hours. Scar mapping was performed on 8 sheep without inducible ventricular tachycardia by use of the noncontact mapping system and a 256-channel contact mapping system.

Noncontact mapping of the left ventricle: insights from validation with transmural contact mapping.

It is not clear whether the noncontact electrograms obtained using the EnSite system in the left ventricle resemble most closely endocardial, intramural, or epicardial contact electrograms or a summation of transmural electrograms. This study compared unipolar virtual electrograms from the EnSite system with unipolar contact electrograms from transmural plunge needle electrodes using a 256-channel mapping system. The study also evaluated the effects of differing activation sites (endocardial, intramural, or epicardial).

Rapid loading of sotalol or amiodarone for management of recent onset symptomatic atrial fibrillation: a randomized, digoxin-controlled trial.

Background: Amiodarone and sotalol are commonly used for the maintenance of sinus rhythm, but the efficacy of these agents administered as high-dose infusions for rapid conversion of atrial fibrillation is unknown. Use in this context would facilitate drug initiation in patients in whom ongoing prophylactic therapy is indicated.

Methods: We assessed the efficacy and safety of rapid high-dose intravenous infusions of amiodarone and sotalol for heart rate control and rapid reversion to sinus rhythm in patients who came to the emergency department with recent-onset symptomatic atrial fibrillation.

Effects of simultaneous insertion of 66 plunge needle electrodes on myocardial activation, function, and structure.

Transmural recordings using plunge needle electrodes are useful in mapping ventricular tachyarrhythmia, but they interfere with activation sequences or damage the myocardium. This study evaluated the effects of insertion of 66 transmural needles on myocardial activation, structure, and function. Epicardial maps were performed at thoracotomy using a 40-electrode plaque in five mongrel dogs.