Determining Which Prosthetic to Use During Aortic Valve Replacement in Patients Aged Younger than 70 Years: A Systematic Review of the Literature.

Background: The choice of bioprosthesis versus mechanical prosthesis in patients aged less than 70 years undergoing aortic valve replacement (AVR) remains controversial, with guidelines disparate in their recommendations. The objective of this study was to explore outcomes after AVR for various age ranges based on type of prosthesis.

Methods: A systematic review was undertaken according to the Preferred Reporting Instructions for Systematic Reviews and Meta-Analyses (PRISMA) guidelines by using Medline (PubMed), Cochrane, Web of Science, Embase, and Scopus databases.

Postnatal neurodevelopmental expression and glutamate-dependent regulation of the ZNF804A rodent homologue.

The zinc finger protein ZNF804A rs1344706 variant is a replicated genome-wide significant risk variant for schizophrenia and bipolar disorder. While its association with altered brain structure and cognition in patients and healthy risk allele carriers is well documented, the characteristics and function of the gene in the brain remains poorly understood. Here, we used in situ hybridization to determine mRNA expression levels of the ZNF804A rodent homologue, Zfp804a, across multiple postnatal neurodevelopmental time points in the rat brain.

Physiology of functional and effective networks in epilepsy.

Epilepsy is a network phenomenon characterized by atypical activity during seizure both at the level of single neurons and neural populations. The etiology of epilepsy is not completely understood but a common theme among proposed mechanisms is abnormal synchronization between neuronal populations. Recent advances in novel imaging and recording technologies have enabled the inference of comprehensive maps of both the anatomical and physiological inter-relationships between brain regions.