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Analysis of the ESC/EACTS 2020 Atrial Fibrillation Guidelines with Perioperative Implications
Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia worldwide with an individual lifetime risk of approximately 37% in the United States. Broadly defined as a supraventricular tachyarrhythmia with disorganized atrial activation, AF results in an increased risk of stroke, heart failure (HF), valvular heart disease (VHD), impaired quality of life and confers a significant burden to the health of individuals and society. AF in the perioperative setting is common and a significant source of perioperative morbidity and mortality worldwide.
Source: Journal of Cardiothoracic and Vascular Anesthesia - May 15, 2021 Category: Anesthesiology Authors: James A. Nelson, Ying X. Gue, Jon M. Christensen, Gregory Y.H. Lip, Harish Ramakrishna Tags: Expert Review Source Type: research

Impaired Activity of Ryanodine Receptors Contributes to Calcium Mishandling in Cardiomyocytes of Metabolic Syndrome Rats
Conclusion Principal findings of this work are that abnormal Ca2+ transient amplitude, contractile dysfunction; and impaired relaxation of MetS cardiomyocytes underlies intrinsic dysfunctional RyR2 and SERCA pump. Abnormal activity of RyRs was evidenced by its decreased ability to bind [3H]-ryanodine. Although the MetS condition does not modify RyR2 protein expression, its phosphorylation at Ser2814 is decreased, which impairs its capacity for activation during ECC. The dysfunctional RyRs, together with a decreased activity of SERCA pump due to decreased Thr17-PLN phosphorylation suggest a downregulation of CaMKII in MetS...
Source: Frontiers in Physiology - April 29, 2019 Category: Physiology Source Type: research

Combination of Dexmedetomidine and Ketamine for Magnetic Resonance Imaging Sedation
Conclusions: The efficacy of DEX–KET sedation was comparable to that of midazolam for MRI examination. DEX–KET was related to shorter scan time and lower occurrence of complications compared to midazolam. Introduction Neurocritically ill patients often require brain magnetic resonance imaging (MRI) in addition to conventional neurological evaluations. Brain MRI can reveal structural lesions with a high sensitivity due to its excellent spatial resolution and enhanced soft tissue contrast (1–3). To acquire MRI images, patients' cooperation is imperative. However, keeping patients with ...
Source: Frontiers in Neurology - April 23, 2019 Category: Neurology Source Type: research

Atrial Transcriptional Profiles of Molecular Targets Mediating Electrophysiological Function in Aging and Pgc-1 β Deficient Murine Hearts
Conclusion: These findings limit the possible roles of gene transcriptional changes in previously reported age-dependent pro-arrhythmic electrophysiologial changes observed in Pgc-1β-/- atria to an altered Ca2+-ATPase (Atp2a2) expression. This directly parallels previously reported arrhythmic mechanism associated with p21-activated kinase type 1 deficiency. This could add to contributions from the direct physiological outcomes of mitochondrial dysfunction, whether through reactive oxygen species (ROS) production or altered Ca2+ homeostasis. Introduction Atrial arrhythmias constitute a major public health pro...
Source: Frontiers in Physiology - April 23, 2019 Category: Physiology Source Type: research

YiQiFuMai Powder Injection Attenuates Coronary Artery Ligation-Induced Heart Failure Through Improving Mitochondrial Function via Regulating ROS Generation and CaMKII Signaling Pathways
This study was carried out in accordance with the recommendations of “Guide for the Care and Use of Laboratory Animals, National Institutes of Health.” The protocol was approved by the “China Pharmaceutical University.” Surgical Preparation The mice were anesthetized with chloral hydrate (4% chloral hydrate, ip). The HF model was induced by CAL as previously reported (Gao et al., 2010). Successful ligation of the coronary artery was confirmed by the occurrence of ST-segment elevation in electrocardiogram. Sham operated mice were performed the same process except left CAL. After ligation, the h...
Source: Frontiers in Pharmacology - April 9, 2019 Category: Drugs & Pharmacology Source Type: research

Efficacy and Efficiency of Perioperative Stellate Ganglion Blocks in Cardiac Surgery: A Pilot Study
Nationally, postoperative atrial fibrillation (POAF) occurs in up to 40% of patients after coronary artery bypass grafting (CABG), 50% of patients after valve surgery, 64% of patients after mitral valve and CABG, and 49% after aortic valve replacement.1 Atrial fibrillation worsens a patient ’s hemodynamic status and increases the risk of congestive heart failure, embolic events, and longer intensive care unit stays, leading to increased patient morbidity and strain on financial resources. In the United States, POAF carries a higher risk of stroke, worsened survival, and an additional 4.9 days and $10,000 to $11,500 in hospital stay costs.
Source: Journal of Cardiothoracic and Vascular Anesthesia - November 20, 2017 Category: Anesthesiology Authors: Christopher W. Connors, Wendy Y. Craig, Scott A. Buchanan, Justin M. Poltak, James B. Gagnon, Craig S. Curry Tags: Letter to the Editor Source Type: research

Time-series Analysis of Heat Waves and Emergency Department Visits in Atlanta, 1993 to 2012
Conclusions: Heat waves can confer additional risks of ED visits beyond those of daily air temperature, even in a region with high air-conditioning prevalence. https://doi.org/10.1289/EHP44 Received: 29 February 2016 Revised: 13 October 2016 Accepted: 24 October 2016 Published: 31 May 2017 Address correspondence to H.H. Chang, Department of Biostatistics and Bioinformatics, Emory University, 1518 Clifton Rd. NE, Atlanta, Georgia 30322. Telephone: (404) 712-4627; E-mail: howard.chang@emory.edu Supplemental Material is available online (https://doi.org/10.1289/EHP44). The authors declare they have no actual ...
Source: EHP Research - May 31, 2017 Category: Environmental Health Authors: Terrie Young Tags: Research Source Type: research