Biomarkers.

Background: Diffusion magnetic resonance imaging (dMRI) permits characterizing differences in white matter microstructure associated with amnestic mild cognitive impairment (aMCI) and Alzheimer's dementia (AD). However, most dMRI measures aggregate signals across multiple axonal fiber populations with varying spatial orientations, which limits the sensitivity and specificity of clinical diagnosis. To overcome this shortcoming, we estimated fiber density (FD) measures, independently from crossing fiber populations, and extracellular cerebral spinal fluid (CSF).

Alzheimer's Imaging Consortium.

Background: Diffusion magnetic resonance imaging (dMRI) permits characterizing differences in white matter microstructure associated with amnestic mild cognitive impairment (aMCI) and Alzheimer's dementia (AD). However, most dMRI measures aggregate signals across multiple axonal fiber populations with varying spatial orientations, which limits the sensitivity and specificity of clinical diagnosis. To overcome this shortcoming, we estimated fiber density (FD) measures, independently from crossing fiber populations, and extracellular cerebral spinal fluid (CSF).

Contemporary outcomes of surgical aortic valve replacement in patients referred for a transcatheter approach.

Objectives: The purpose of this study is to examine which patients referred to our structural valve clinic for potential transcatheter aortic valve replacement (TAVR) are receiving surgical aortic valve replacement (SAVR) whether due to unsuitable anatomy for TAVR versus other reasons.

Methods: Individuals referred for TAVR from January 2019 to March 2022, who ultimately underwent SAVR were examined, retrospectively. Patients were divided into 2 surgical groups: TAVR was technically unsuitable (SAVR-TU) and those in which TAVR was technically feasible (SAVR-TF).

Proper Treatment and Management of Postcardiotomy Refractory Vasospasm.

We present here a unique case in which a 63-year-old man developed diffuse coronary vasospasm on postoperative day (POD) 1 following uneventful aortic valve replacement, replacement of ascending aorta, and coronary artery bypass. Subsequent emergent coronary angiogram demonstrated diffuse native coronary artery vasospasm that was only transiently responsive to intracardiac nitroglycerin, resulting in persistent cardiogenic shock and severe biventricular dysfunction. The patient was, thus, placed on femoral-femoral venoarterial (VA) extracorporeal membrane oxygenation (ECMO) with Impella support.