Different Chemical Environments of [GeSe] in the Li Compounds [Li(HO)][GeSe]·4.33HO, [{Li(thf)}GeSe], and [Li(HO)][MnGeSe], and Ionic Conductivity of Underlying "LiGeSe".

The crystalline selenido germanates [Li(HO)][GeSe]·4.3HO (), [{Li(thf)}GeSe] (), and [Li(HO)][MnGeSe] () (thf = THF = tetrahydrofuran) were obtained by an extraction of a glassy ternary phase of the nominal composition LiGeSe (=LiS·2GeSe) with water () or THF () and slow evaporation of the solvent or by being layered with MnBr in HO/MeOH (), respectively. The compounds contain known selenido germanate anions, however, for the first time with Li counterions.

Evaluation of the effectiveness of a wearable cardioverter defibrillator detection algorithm.

Background: Wearable cardioverter defibrillators (WCDs) provide protection from sudden cardiac death. The efficacy of a WCD detection algorithm has not been reported outside of clinical trial.

Methods: The efficacy of the algorithm was reviewed through a retrospective analysis of appropriate shocks, inappropriate shocks, and arrhythmia detections during a 1-year period.

Exploring QT interval changes as a precursor to the onset of ventricular fibrillation/tachycardia.

In the present study, we have retrospectively analyzed the corrected QT (QTc) interval before spontaneous episodes of sudden cardiac arrest in patients with a wearable cardioverter defibrillator. Corrected QT interval was measured for all normal beats from 32 recordings of baseline rhythm and compared to normal rhythm before a paired spontaneous cardiac arrhythmia. Before arrhythmia, the QTc (505 +/- 73 ms) was not significantly longer than the baseline rhythm (497 +/- 73 ms) (P = .