Malperfusion in Patients with Acute Type A Aortic Dissection: A Nationwide Analysis.

Background: This study describes in detail the clinical burden of malperfusion associated with acute Type A aortic dissection (ATAAD) in a large, national cohort and the effect of treatment strategy on outcomes.

Methods: All patients undergoing repair of ATAAD between 2017 and 2020 in the Society of Thoracic Surgeons (STS) Adult Cardiac Surgery Database were studied. Malperfusion was defined using STS definitions based on imaging or surgeon's evaluation.

Coordination Chemistry and Photoluminescence of Sm(II) Dibenzo-24-crown-8 Complexes.

Three Sm(II) dibenzo-24-crown-8 (db24c8) complexes were synthesized in anhydrous, air-free conditions via the reaction of SmI with db24c8 and tetrabutylammonium tetraphenylborate ([TBA][BPh]; where needed) in acetonitrile (CHCN), dimethoxyethane (DME), and tetrahydrofuran (THF) to yield [Sm(db24c8)(CHCN)][BPh][I]·CHCN, [Sm(db24c8)(DME)]I, and [Sm(db24c8)(THF)]I, respectively. In each case, a 10-coordinate, staggered dodecahedral (2:6:2) environment is formed around the Sm center that is completed by either two solvent molecules (CHCN or THF) or one bidentate solvent molecule (DME). Inner-sphere solvent molecules can be excluded by reacting SmI with db24c8 in 1:3 THF:toluene to yield Sm(db24c8)I.

Humeral and Glenoid Component Malposition in Revision Shoulder Arthroplasty: A Retrospective, Cross-sectional Study.

Background: The purpose of this study was to assess the incidence of glenoid and humeral component malposition in failed primary shoulder arthroplasty requiring revision. We hypothesized that glenoid and humeral component malposition would be a prevalent feature in cases requiring revision arthroplasty for primary anatomic TSA, primary RSA, and primary hemiarthroplasty procedures.

Methods: A retrospective cross-sectional study was performed focusing on identifying the incidence of malpositioned components in shoulder arthroplasty in quantitative and qualitative reviews.

Deviation between the Structural Chemistry of Barium and Radium Halides: Synthesis and Characterization of RaX·HO and RaX·2HO (X = Cl and Br).

To develop the structural chemistry of radium, the halide compounds RaX·HO and RaX·2HO (X = Cl and Br) have been synthesized and characterized and serve as benchmarks for comparisons with more complex compounds in the future. In contrast with historic reports on the structural chemistry of radium, the Ra chlorides differ from their Ba analogues. For MCl·HO (M = Ba, Ra), the variance between the metal coordination environments manifests as a small, local distortion that becomes more apparent in the extended structure.