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https://www.readbyqxmd.com/read/29340729/pulmonary-valve-morphology-in-patients-with-bicuspid-aortic-valves
#1
Wilke M C Koenraadt, Margot M Bartelings, Adriana C Gittenberger-de Groot, Regina Bökenkamp, Marco C DeRuiter, Martin J Schalij, Monique R M Jongbloed
The aortic and pulmonary valve share a common developmental origin from the embryonic arterial trunk. Bicuspid aortic valve is the most common congenital anomaly and can occur isolated as well as in association with other congenital heart disease (CHD). Data on pulmonary valve morphology in these cases are scarce. In this study, we aimed to determine pulmonary valve morphology in hearts with BAV associated with CHD. In 83 post-mortem heart specimens with BAV and associated CHD, pulmonary valve morphology was studied and related to BAV morphology...
January 16, 2018: Pediatric Cardiology
https://www.readbyqxmd.com/read/29337121/the-society-of-thoracic-surgeons-congenital-heart-surgery-database-2018-update-on-outcomes-and-quality
#2
Jeffrey P Jacobs, John E Mayer, Sara K Pasquali, Kevin D Hill, David M Overman, James D St Louis, S Ram Kumar, Carl L Backer, Charles D Fraser, James S Tweddell, Marshall L Jacobs
The Society of Thoracic Surgeons Congenital Heart Surgery Database is a comprehensive clinical outcomes registry which captures almost all pediatric cardiac surgical operations in the United States. It is the platform for all activities of The Society of Thoracic Surgeons related to the analysis of outcomes and the improvement of quality in this subspecialty. This article summarizes current aggregate national outcomes in congenital and pediatric cardiac surgery and reviews related activities in the areas of quality measurement, performance improvement, and transparency...
January 11, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29336395/tricuspid-valve-straddling-an-uncommon-cause-of-left-ventricular-outflow-tract-obstruction-in-transposition-of-great-artery-with-ventricular-septal-defect
#3
Bhupesh Kumar, Aveek Jayant, Ganesh Kumar Munirathinam, Sachin Mahajan
Transposition of great arteries (TGA) can be associated with left ventricle outflow tract (LVOT) obstruction. In the presence of ventricular septal defect (VSD), septal leaflet of tricuspid valve may prolapse through perimembranous VSD or rarely tricuspid valve tissue may override to produce LVOT obstruction. Occasionally, this may be mistaken for vegetation due to associated pulmonary valve endocarditis. We report a case of d-TGA with presumptive pulmonary valve endocarditis and LVOT obstruction that was found to be due to tricuspid valve straddling on transesophageal echocardiography, resulting in change in the surgical plan and thus avoiding catastrophe...
January 2018: Annals of Cardiac Anaesthesia
https://www.readbyqxmd.com/read/29326113/acute-heart-failure-with-new-onset-continuous-murmur-in-a-26-year-old-man
#4
Yi-Chen Wang, Chen-Wei Huang, Ting-Wei Lin
CLINICAL INTRODUCTION: A 26-year-old man with an unremarkable medical history sensed a momentary retrosternal 'pop' followed by overwhelming dyspnoea, without reporting any prodromal symptoms. At the emergency department, he had a significant tachycardia (170 bpm) and an extreme low diastolic blood pressure (<30 mm Hg). A loud, harsh and continuous murmur could be maximally auscultated at the right lower sternal border. ECG revealed global ST depression with ST elevation in lead aVR...
January 11, 2018: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29321262/nonsensing-residues-in-s3-s4-linker-s-c-terminus-affect-the-voltage-sensor-set-point-in-k-channels
#5
Joao L Carvalho-de-Souza, Francisco Bezanilla
Voltage sensitivity in ion channels is a function of highly conserved arginine residues in their voltage-sensing domains (VSDs), but this conservation does not explain the diversity in voltage dependence among different K+ channels. Here we study the non-voltage-sensing residues 353 to 361 in Shaker K+ channels and find that residues 358 and 361 strongly modulate the voltage dependence of the channel. We mutate these two residues into all possible remaining amino acids (AAs) and obtain Q-V and G-V curves. We introduced the nonconducting W434F mutation to record sensing currents in all mutants except L361R, which requires K+ depletion because it is affected by W434F...
January 10, 2018: Journal of General Physiology
https://www.readbyqxmd.com/read/29317578/-identification-and-functional-analysis-of-%C3%A2-a-novel-hand1-mutation-associated-with-congenital-ventricular-septal-defect
#6
Cheng Wang, Bin Zhou, Xiangqing Kong
To identify the novel HAND1 mutation associated with congenital ventricular septal defect (VSD) and to perform the functional analysis.
 Methods: A total of 125 patients with congenital VSD and 210 control individuals were recruited, and their clinical data and blood samples were collected. The genomic DNA from each study subject was isolated, and all the coding exons of HAND1 were amplified. The amplicons from HAND1 were sequenced to identify a sequence variation. The functional characteristics of the mutant HAND1 were analyzed by a dual-luciferase reporter assay system...
December 28, 2017: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/29317195/induction-of-divalent-cation-permeability-by-heterologous-expression-of-a-voltage-sensor-domain
#7
Hiroki Arima, Hidekazu Tsutsui, Ayako Sakamoto, Manabu Yoshida, Yasushi Okamura
The voltage sensor domain (VSD) is a protein domain that confers sensitivity to membrane potential in voltage-gated ion channels as well as the voltage-sensing phosphatase. Although VSDs have long been considered to function as regulatory units acting on adjacent effectors, recent studies have revealed the existence of direct ion permeation paths in some mutated VSDs and in the voltage-gated proton channel. In this study, we show that calcium currents are evoked upon membrane hyperpolarization in cells expressing a VSD derived from an ascidian voltage-gated ion channel superfamily...
January 6, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29317056/a-potentially-curative-fetal-intervention-for-hypoplastic-left-heart-syndrome
#8
Andrew T Hattam
Hypoplastic left heart syndrome (HLHS) encapsulates a spectrum of complex congenital cardiovascular malformations involving varying degrees of underdevelopment of the left-sided heart structures. However, despite improved survival rates since the introduction of staged surgical reconstruction, treatment options for HLHS remain palliative rather than curative. A major limiting factor in the development of definitive curative therapy for HLHS is an incomplete understanding of its pathogenesis. Currently, the aetiology HLHS is best conceptualised by the 'flow theory' of cardiogenesis, which states that normal cardiac development is reliant on the interrelationship of normal flow patterns of blood through the developing heart, and appropriate growth of the cardiac valves and myocardium...
January 2018: Medical Hypotheses
https://www.readbyqxmd.com/read/29311306/mechanism-specific-assay-design-facilitates-the-discovery-of-nav1-7-selective-inhibitors
#9
Tania Chernov-Rogan, Tianbo Li, Gang Lu, Henry Verschoof, Kuldip Khakh, Steven W Jones, Maureen H Beresini, Chang Liu, Daniel F Ortwine, Steven J McKerrall, David H Hackos, Daniel Sutherlin, Charles J Cohen, Jun Chen
Many ion channels, including Nav1.7, Cav1.3, and Kv1.3, are linked to human pathologies and are important therapeutic targets. To develop efficacious and safe drugs, subtype-selective modulation is essential, but has been extremely difficult to achieve. We postulate that this challenge is caused by the poor assay design, and investigate the Nav1.7 membrane potential assay, one of the most extensively employed screening assays in modern drug discovery. The assay uses veratridine to activate channels, and compounds are identified based on the inhibition of veratridine-evoked activities...
January 8, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29310562/programmatic-changes-to-reduce-mortality-and-morbidity-in-humanitarian-congenital-cardiac-surgery
#10
Tyler J Wallen, George J Arnaoutakis, Randa Blenden, Rodrigo Soto
BACKGROUND: This report documents the outcomes of cardiac surgical mission trips organized by the International Children's Heart Foundation (ICHF), a nongovernmental organization that provides congenital heart surgery services to the developing world, and discusses factors associated with a reduction of mortality and morbidity in this setting. METHODS: A retrospective review of a prospectively maintained database was conducted to identify any patient who underwent surgical intervention during the course of an ICHF mission trip...
January 2018: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/29305732/anatomy-of-the-retro-oesophageal-major-aortopulmonary-collateral-arteries-in-patients-with-pulmonary-atresia-with-ventricular-septal-defect-results-from-preoperative-cta
#11
Qianjun Jia, Jianzheng Cen, Jinglei Li, Jian Zhuang, Hui Liu, Qun Zhang, Xiaoqing Liu, Meiping Huang, Changhong Liang
OBJECTIVES: To assess the frequency and anatomy of retro-oesophageal aortopulmonary collateral arteries (REMs) in patients with pulmonary atresia with ventricular septal defect and major aortopulmonary collateral arteries (PA-VSD-MAPCAs). METHODS: A total of 130 consecutive PA-VSD-MAPCA patients with preoperative CT angiography (CTA) data who underwent cardiac surgery were included. A detailed analysis of MAPCA anatomy was performed using CTA. RESULTS: A REM was identified in 82/130 included patients (63 %)...
January 5, 2018: European Radiology
https://www.readbyqxmd.com/read/29305187/cardiac-arrest-and-ventricular-arrhythmia-in-adults-with-ebstein-anomaly-and-left-ventricular-non-compaction
#12
Magdalena Kumor, Magdalena Lipczyńska, Elzbieta Katarzyna Biernacka, Anna Klisiewicz, Anna Wójcik, Marek Konka, Katarzyna Kożuch, Piotr Szymański, Piotr Hoffman
BACKGROUND: Ebstein anomaly is a complex, congenital heart defect that is associated with a variety of cardiac abnormalities. Studies found a similar sarcomere gene mutation in patients with Ebstein anomaly (EA) and patients with isolated left ventricular non-compaction (LVNC). AIM: We aimed to show the prevalence of LVNC and its potential relationship with severe cardiac events (VT - ventricular tachycardia, cardiac arrest) in adult patients with EA. METHODS: We conducted a retrospective search of our institutional database from 2010 to 2014 for patients with EA and reviewed patients' medical records (age, sex, clinical presentation, electrocardiographic, echocardiographic, and CMR - cardiac magnetic resonance features)...
January 2, 2018: Journal of Cardiology
https://www.readbyqxmd.com/read/29289565/artifactual-hyperpolarization-during-extracellular-electrical-stimulation-proposed-mechanism-of-high-rate-neuromodulation-disproved
#13
L Stephen Lesperance, Milad Lankarany, Tianhe C Zhang, Rosana Esteller, Stéphanie Ratté, Steven A Prescott
BACKGROUND: Kilohertz-frequency electric field stimulation (kEFS) applied to the spinal cord can reduce chronic pain without causing the buzzing sensation (paresthesia) associated with activation of dorsal column fibers. This suggests that high-rate spinal cord stimulation (SCS) has a mode of action distinct from conventional, parasthesia-based SCS. A recent study reported that kEFS hyperpolarizes spinal neurons, yet this potentially transformative mode of action contradicts previous evidence that kEFS induces depolarization and was based on patch clamp recordings whose accuracy in the presence of kEFS has not been verified...
December 15, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/29288186/long-term-early-development-research-in-congenital-heart-disease-leader-chd-a-study-protocol-for-a-prospective-cohort-observational-study-investigating-the-development-of-children-after-surgical-correction-for-congenital-heart-defects-during-the-first-3-years
#14
Hannah Ferentzi, Constanze Pfitzer, Lisa-Maria Rosenthal, Felix Berger, Katharina R L Schmitt
INTRODUCTION: Congenital heart disease (CHD) is the most common birth defect. Studies on the development of children with CHD point towards deficits in motoric, cognitive and language development. However, most studies are cross-sectional and there is a gap in the knowledge concerning developmental trajectories, risk and protective factors and a lack of research concerning environmental predictors. Specifically, no studies have so far considered the importance of early caregiving experiences and child temperament for the development of children with CHD...
December 28, 2017: BMJ Open
https://www.readbyqxmd.com/read/29286939/clinical-profile-and-pattern-of-congenital-heart-disease-in-infants-of-diabetic-mother-and-infants-of-non-diabetic-mother-at-a-tertiary-care-hospital
#15
Suraiya Begum, Sanjoy Kumar Dey
OBJECTIVES: To assess the clinical manifestations and pattern of congenital heart diseases (CHD) in infants of diabetic mothers (IDMs) and infants of non-diabetic mothers. METHODS: A prospective cross sectional study was carried out at tertiary care center over a period of thirty months. All neonates were included in this study if CHD were identified by echocardiography within this study period. Chi-square test and Fisher's exact test were used to compare between groups...
2017: Journal of Neonatal-perinatal Medicine
https://www.readbyqxmd.com/read/29281616/influence-of-type-of-congenital-heart-defects-on-epithelial-lining-fluid-composition-in-infants-undergoing-cardiac-surgery-with-cardiopulmonary-bypass
#16
Manuela Simonato, Aldo Baritussio, Virgilio P Carnielli, Luca Vedovelli, Gianclaudio Falasco, Michele Salvagno, Massimo Padalino, Paola Cogo
BACKGROUND: In children with congenital heart disease (CHD), altered pulmonary circulation compromises gas exchange. Moreover, pulmonary dysfunction is a complication of cardiac surgery with cardiopulmonary bypass (CPB). No data are available on the effect of different CHDs on lung injury. The aim of this study was to analyze epithelial lining fluid (ELF) surfactant composition in children with CHD. METHODS: Tracheal aspirates (TAs) from 72 CHD children [age 2.9 (0...
December 27, 2017: Pediatric Research
https://www.readbyqxmd.com/read/29273241/a-meta-analysis-of-transcatheter-device-closure-of-perimembranous-ventricular-septal-defect
#17
Haripriya Santhanam, LinQi Yang, Zhaojin Chen, Bee-Choo Tai, Dimple D Rajgor, Swee-Chye Quek
BACKGROUND: While transcatheter device closure of ventricular septal defects (VSDs) is gaining popularity, concerns remain about adverse events; particularly heart block in peri-membranous VSDs (pmVSDs). The aim of this study is to ascertain outcomes of transcatheter device closure of pmVSDs through a meta-analysis of current literature. METHODS: A PubMed and Scopus search for studies in English on device closure of pmVSDs published till end-February 2017 was performed...
December 7, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/29250151/efficacy-of-combined-treatment-with-vacuum-sealing-drainage-and-recombinant-human-epidermal-growth-factor-for-refractory-wounds-in-the-extremities-and-its-effect-on-serum-levels-of-il-6-tnf-%C3%AE-and-il-2
#18
Lei Tan, Zhongyu Hou, Yanzhi Gao
The objective of this study was to investigate the efficacy of combined treatment with vacuum sealing drainage (VSD) and recombinant human epidermal growth factor (rhEGF) for refractory wounds in the extremities, and its effect on serum levels of interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), and IL-2. Ninety-eight patients with refractory wounds in the extremities were recruited and randomly divided into the combined treatment group (underwent VSD and rhEGF treatment) and control group (underwent VSD only) with 49 cases each...
January 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29249087/a-complex-ventricular-septal-defect-following-transcatheter-aortic-valve-implantation-evaluated-by-3d-transthoracic-echocardiography
#19
Giovanni Barbati, Roberto Zeppellini, Giovanna Erente, Angelo B Ramondo
Transcatheter aortic valve implantation (TAVI) has revolutionized the treatment of elderly patients with symptomatic severe aortic valve stenosis. Among the possible TAVI complications, a rare one is the annular/left ventricular outflow tract rupture. We report a rare case of a late complex ventricular septal defect (VSD) following TAVI with a balloon-expandable prosthesis, conservatively managed. Our case demonstrates the role of 3D transthoracic echocardiography (3DTTE) in the accurate diagnosis of this TAVI complication and suggests that, in some cases, it can be used as an alternative to other diagnostic tools, such as transesophageal echocardiography, cardiac catheterization, and computed tomography...
December 17, 2017: Echocardiography
https://www.readbyqxmd.com/read/29236481/exploring-the-nanotoxicology-of-mos2-a-study-on-the-interaction-of-mos2-nanoflake-and-k-channels
#20
Zonglin Gu, Leigh D Plant, Xuanyu Meng, Jose Manuel Perez-Aguilar, Zegao Wang, Mingdong Dong, Diomedes E Logothetis, Ruhong Zhou
Molybdenum disulfide (MoS2) nanomaterial has recently found various applications in the biomedical field mainly due to its outstanding physicochemical properties. However, little is known about its interactions with biological systems at the atomic level, which intimately relates to the biocompatibility of the material. To provide insights into the effects of MoS2 in biological entities, we investigated the interactions of MoS2 with proteins from a functionally important membrane family, the ubiquitous potassium (K+) channels...
December 13, 2017: ACS Nano
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