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| http://dx.doi.org/10.1016/j.hrcr.2021.05.003 | DOI Listing |
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Estrogen-regulated lateral septal kisspeptin neurons abundantly project to GnRH neurons and the hypothalamic supramammillary nucleus.
J Neurosci
January 2025
Laboratory of Reproductive Neurobiology, Hun-Ren Institute of Experimental Medicine, Budapest, 1083 Hungary;
While hypothalamic kisspeptin (KP) neurons play well-established roles in the estrogen-dependent regulation of reproduction, little is known about extrahypothalamic KP-producing (KP) neurons of the lateral septum. As established previously, expression in this region is low and regulated by estrogen receptor- and GABA receptor-dependent mechanisms. Our present experiments on knock-in mice revealed that transgene expression in the LS begins at P33-36 in females and P40-45 in males and is stimulated by estrogen receptor signaling.
View Article and Find Full Text PDFPulsed Field Ablation (PFA) is a new ablation method being rapidly adopted for treatment of atrial fibrillation, which shows advantages in safety and efficiency over radiofrequency and cryo-ablation. In this study, we used an in vivo swine model (10 healthy and 5 with chronic myocardial infarct) for ventricular PFA, collecting intracardiac electrograms, electro-anatomical maps, native T1-weighted and late gadolinium enhancement MRI, gross pathology, and histology. We used 1000-1500 V pulses, with 1-16 pulse trains to vary PFA dose.
View Article and Find Full Text PDFBeyond the usual challenges, a case of LV summit PVCs ablation in child with ASO for D-TGA.
BMC Cardiovasc Disord
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Magdi Yacoub Heart Foundation, Cairo, Egypt.
Premature ventricular contractions (PVCs) are a common finding in patients with surgically repaired congenital heart defects including transposition of the great arteries (D-TGA). While often asymptomatic, PVCs can sometimes lead to palpitations, dyspnea, and hemodynamic compromise, requiring therapeutic intervention. The arterial switch operation is the preferred treatment for D-TGA, but these patients have a 2% incidence of ventricular arrhythmias and 1% incidence of sudden cardiac death post-operatively.
View Article and Find Full Text PDFThe Anatomy of Context.
Hippocampus
January 2025
Department of Cognitive and Psychological Sciences, Brown University, Providence, Rhode Island, USA.
For most of my career, I focused on understanding how and where spatial context, the place where things happen, is represented in the brain. My interest in this began in the early 1990's, during my postdoctoral training with David Amaral, when we defined the rodent homolog of the primate parahippocampal cortex, a region implicated in processing spatial and contextual information. We parceled out the caudal portion of the rat perirhinal cortex (PER) and called it the postrhinal cortex (POR).
View Article and Find Full Text PDFCatheter Ablation of Idiopathic Left Anterior Fascicular Ventricular Arrhythmias: Predicting Origin Sites via Mapping and Electrocardiography.
J Cardiovasc Electrophysiol
December 2024
Department of Cardiology, Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.
Background: Idiopathic ventricular arrhythmias (VAs) arising from the left anterior fascicle (LAF) are uncommonly seen, and their characteristics still need to be sufficiently investigated. This study aimed to conclude these VAs' characteristics and explore efficient ablation strategies.
Methods: Data were analyzed from 118 patients undergoing successful catheter ablation for LAF VAs.
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