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https://www.readbyqxmd.com/read/29785758/undifferentiated-embryonal-sarcoma-of-liver-in-an-adult-with-spontaneous-rupture-and-tumour-thrombus-in-the-right-atrium
#1
Narendra Pandit, Lokesh S Jaiswal, Vijay Shrestha, Lalijan Awale, Shailesh Adhikary
No abstract text is available yet for this article.
May 22, 2018: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/29784942/continuous-addition-of-progenitors-forms-the-cardiac-ventricle-in-zebrafish
#2
Anastasia Felker, Karin D Prummel, Anne M Merks, Michaela Mickoleit, Eline C Brombacher, Jan Huisken, Daniela Panáková, Christian Mosimann
The vertebrate heart develops from several progenitor lineages. After early-differentiating first heart field (FHF) progenitors form the linear heart tube, late-differentiating second heart field (SHF) progenitors extend the atrium and ventricle, and form inflow and outflow tracts (IFT/OFT). However, the position and migration of late-differentiating progenitors during heart formation remains unclear. Here, we track zebrafish heart development using transgenics based on the cardiopharyngeal gene tbx1. Live imaging uncovers a tbx1 reporter-expressing cell sheath that continuously disseminates from the lateral plate mesoderm towards the forming heart tube...
May 21, 2018: Nature Communications
https://www.readbyqxmd.com/read/29784593/diagnosis-and-surgical-management-of-inferior-vena-cava-leiomyomatosis
#3
Chao Yang, Huimin Fang, Yunsong Yang, Fei Cai, Hong Zheng, Bi Jin, Yiqing Li, Zheng Liu, Mohamed A Zayed
OBJECTIVE: We aimed to review our experience in the diagnosis and surgical management of patients diagnosed with inferior vena cava leiomyomatosis (IVL). METHODS: We retrospectively evaluated all patients diagnosed with IVL between 1999 and 2015. Patient demographics, diagnostic imaging, operative techniques, and perioperative outcomes were reviewed. RESULTS: Over the study period, 16 patients with an IVL diagnosis were identified. In all patients, the diagnosis was made with ultrasound and magnetic resonance imaging...
May 18, 2018: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/29784052/the-effect-of-heart-failure-and-left-ventricular-assist-device-treatment-on-right-ventricular-mechanics-a-computational-study
#4
Jun I K Park, Aulia Khamas Heikhmakhtiar, Chang Hyun Kim, Yoo Seok Kim, Seong Wook Choi, Kwang Soup Song, Ki Moo Lim
BACKGROUND AND AIMS: Although it is important to analyze the hemodynamic factors related to the right ventricle (RV) after left ventricular assist device (LVAD) implantation, previous studies have focused only on the alteration of the ventricular shape and lack quantitative analysis of the various hemodynamic parameters. Therefore, we quantitatively analyzed various hemodynamic parameters related to the RV under normal, heart failure (HF), and HF incorporated with continuous flow LVAD therapy by using a computational model...
May 22, 2018: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29783947/preexcitation-syndrome-experimental-study-on-the-electrocardiogram-of-antegradely-conducting-accessory-pathway
#5
Zhaolong Xu, Renguang Liu, Qinghua Chang, Changjun Li
BACKGROUND: Preexcitation syndrome is characterized by a dominant delta wave on the baseline electrocardiogram (ECG), resulting from the change in QRS initial vector by the accessory pathway (AP). This study is to explore the effect of ventricular preexcitation on the QRS initial, maximal and terminal vector in an experimental rabbit with preexcitation syndrome induced by programmed electrical stimulation. METHODS: Rabbits (n = 10) were randomized for the experimental model of ventricular preexcitation...
May 21, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29780574/synchronous-nephrectomy-and-cavoatrial-tumor-thrombectomy-under-normothermic-extracorporeal-circulation-and-beating-heart
#6
Eleftheria Mavrigiannaki, Ioannis Fesatidis, Evgenia Kalogridaki, Ioannis-Petros Katralis, Dimitrios Filippou, Panagiotis Skandalakis, Dionisios Vrochides
Formation of tumor thrombus is an occasional manifestation of renal cell carcinoma (RCC). Intravascular invasion of the renal vein and thereafter the inferior vena cava (IVC) might in very rare cases extend into the cardiac chambers. The subtle course and symptoms of such cases alongside with the engagement of vital anatomical structures marks them as a diagnostic and therapeutic challenge. Aggressive surgical intervention has proven to be critical for survival rates in such cases; however total synchronous resection remains a challenge for the surgical team and a debate for the medical community...
May 2018: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/29780065/prediction-of-fontan-associated-liver-disease-using-a-novel-cine-magnetic-resonance-imaging-vortex-flow-map-in-the-right-atrium
#7
Umiko Ishizaki, Michinobu Nagao, Yumi Shiina, Kenji Fukushima, Tatsunori Takahashi, Yamato Shimomiya, Yuka Matsuo, Kei Inai, Shuji Sakai
BACKGROUND: Long-term hepatic dysfunction is an increasingly recognized complication of the Fontan operation for univentricular hearts. The purpose of this study was to determine whether Fontan-associated liver disease (FALD) could be predicted by flow dynamics in the right atrium (RA) of Fontan circulation.Methods and Results:Cardiac MRI and the serum levels of total bilirubin (TBil) and hyaluronic acid (HA) were analyzed in 36 patients who underwent an atriopulmonary connection type of Fontan operation...
May 18, 2018: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29777668/anterior-pericardiectomy-for-post-infective-constrictive-pericarditis-intermediate-term-outcomes
#8
Anil Acharya, Raamesh Koirala, Nivesh Rajbhandari, Jyotindra Sharma, Bijoy Rajbanshi
BACKGROUND: Post tubercular constrictive pericarditis is prevalent pericardial disease in developing countries. Pericardiectomy is the treatment of choice but considered a procedure of high morbidity and mortality. METHODS: From January 2003 to December 2013 we performed 130 pericardiectomies. Mean age was 22.95±12.55 years with 92 (71%) males. All patients were symptomatic; 118 (91%) were in NYHA class III / IV. Almost all patients were diagnosed to be of tubercular origin; 14 (11 %) histopathologically proven, 77 (59%) with definitive history while 39 (30%) suspected to be of tubercular origin and 91 (70%) received prior antitubercular treatment...
May 16, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29777140/different-responses-of-left-atrium-and-left-atrial-appendage-to-radiofrequency-catheter-ablation-of-atrial-fibrillation-a-follow-up-mri-study
#9
Yun Gi Kim, Jaemin Shim, Suk-Kyu Oh, Hee-Soon Park, Kwang-No Lee, Sung Ho Hwang, Jong-Il Choi, Young-Hoon Kim
Atrial fibrillation (AF) is known to cause adverse remodeling of left atrium (LA). Radiofrequency catheter ablation (RFCA) of AF is associated with decrease in LA volume. However, the impact of RFCA on left atrial appendage (LAA) volume and hemodynamic function is not fully understood. We analyzed 123 patients who underwent cardiac magnetic resonance imaging (MRI) evaluation before and after RFCA in Korea University Anam Hospital. LA and LAA volume were measured before and after RFCA based on cardiac MRI. Baseline LA volume was 99...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29776941/giant-left-atrium-look-before-you-leap-into-invasive-procedures
#10
Jian Liang Tan, Kshitij Thakur, Jonathan Finkel
No abstract text is available yet for this article.
May 18, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29776560/large-animal-model-of-acute-right-ventricular-failure-with-functional-tricuspid-regurgitation
#11
Marcin Malinowski, Alistair G Proudfoot, Lenora Eberhart, Hans Schubert, Jeremy Wodarek, David Langholz, Manuel K Rausch, Tomasz A Timek
BACKGROUND: Functional tricuspid regurgitation (FTR) commonly arises secondary to conditions affecting the left heart and is associated with right ventricular dysfunction and tricuspid annular dilatation. We set out to establish an animal model of acute RV failure (RVF) with FTR resembling the clinical features. METHODS: Ten adult sheep had pressure sensors placed in the LV, RV, and right atrium while sonomicrometry crystals were implanted around tricuspid annulus and on the RV...
August 1, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29775081/reference-values-of-left-heart-echocardiographic-dimensions-and-mass-in-male-peri-pubertal-athletes
#12
Elena Cavarretta, Francesco Maffessanti, Fabio Sperandii, Emanuele Guerra, Federico Quaranta, Antonia Nigro, Monia Minati, Marco Rebecchi, Chiara Fossati, Leonardo Calò, Fabio Pigozzi
Background Several articles have proposed reference values in healthy paediatric subjects, but none of them has evaluated a large population of healthy trained adolescents. Design The study purpose was to establish normal echocardiographic measurements of left heart (aortic root, left atrium and left ventricular dimensions and mass) in relation to age, weight, height, body mass index, body surface area and training hours in this specific population. Methods We retrospectively evaluated 2151 consecutive, healthy, peri-pubertal athletes (100% male, mean age 12...
January 1, 2018: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/29770745/2706-km-cycling-in-two-weeks-effects-on-cardiac-function-in-six-elderly-male-athletes
#13
Thomas Morville, Mads Rosenkilde, Nick Mattsson, Flemming Dela, Jørn W Helge, Hanne K Rasmusen
INTRODUCTION: Physiological effects of exercise on trained and untrained individuals have been studied extensively. Typically, young or middle-aged individuals are examined before and after short periods of vigorous exertion. METHODS: We studied six elderly male athletes (61±8 years (mean ± SD); baseline VO2 max 48±5 ml·kg-1 · min-1 ) with focus on cardiac function and biomarkers following 14 consecutive days of moderate intensity exercise. Cardiac dimensions, function, biomarkers, and other measures of cardiovascular health were examined at baseline and 2 and 28 h after the last day of cycling a total of 2706 km...
May 17, 2018: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/29770201/recent-advances-in-managing-septal-defects-ventricular-septal-defects-and-atrioventricular-septal-defects
#14
REVIEW
P Syamasundar Rao, Andrea D Harris
This review discusses the management of ventricular septal defects (VSDs) and atrioventricular septal defects (AVSDs). There are several types of VSDs: perimembranous, supracristal, atrioventricular septal, and muscular. The indications for closure are moderate to large VSDs with enlarged left atrium and left ventricle or elevated pulmonary artery pressure (or both) and a pulmonary-to-systemic flow ratio greater than 2:1. Surgical closure is recommended for large perimembranous VSDs, supracristal VSDs, and VSDs with aortic valve prolapse...
2018: F1000Research
https://www.readbyqxmd.com/read/29764552/-construction-of-death-early-warning-model-for-patients-with-septic-myocardial-depression-a-retrospective-analysis-of-129-patients
#15
Jianping Huang, Yangqing Zhou, Haifen Liu
OBJECTIVE: To explore the death risk factors of septic myocardial depression (SMD) and their predictive effect, and to set up a death early-warning model. METHODS: A retrospective analysis was conducted. The patients with SMD admitted to emergency department and rescue room of Beilun Branch of the First Affiliated Hospital of Zhejiang University Medical College from January 2015 to November 2017 were enrolled. The patients were divided into survival group and non-survival group according to 28-day outcome, and the gender, age, and the initial examination parameters [white blood cell (WBC) count, neutrophil (Neut) count, activated partial thromboplastin time (APTT), procalcitonin (PCT), D-dimer, C-reactive protein (CRP), cardiac troponin I (cTnI), N-terminal pro-brain natriuretic peptide (NT-proBNP), left ventricular ejection fraction (LVEF), left ventricular end-diastolic diameter (LVEDD), and left atrium diameter (LAD)] of both groups were compared...
May 2018: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/29762122/distinct-myocardial-lineages-break-atrial-symmetry-during-cardiogenesis-in-zebrafish
#16
Almary Guerra, Raoul Fv Germano, Oliver Stone, Rima Arnaout, Stefan Guenther, Suchit Ahuja, Verónica Uribe, Benoit Vanhollebeke, Didier Yr Stainier, Sven Reischauer
The ultimate formation of a four-chambered heart allowing the separation of the pulmonary and systemic circuits was key for the evolutionary success of tetrapods. Complex processes of cell diversification and tissue morphogenesis allow the left and right cardiac compartments to become distinct but remain poorly understood. Here, we describe an unexpected laterality in the single zebrafish atrium analogous to that of the two atria in amniotes, including mammals. This laterality appears to derive from an embryonic antero-posterior asymmetry revealed by the expression of the transcription factor gene meis2b ...
May 15, 2018: ELife
https://www.readbyqxmd.com/read/29760998/3d-time-blood-flow-mapping-using-spim-micropiv-in-the-developing-zebrafish-heart
#17
Vytautas Zickus, Jonathan M Taylor
We present SPIM-μPIV as a flow imaging system, capable of measuring in vivo flow information with 3D micron-scale resolution. Our system was validated using a phantom experiment consisting of a flow of beads in a 50 μm diameter FEP tube. Then, with the help of optical gating techniques, we obtained 3D + time flow fields throughout the full heartbeat in a ∼3 day old zebrafish larva using fluorescent red blood cells as tracer particles. From this we were able to recover 3D flow fields at 31 separate phases in the heartbeat...
May 1, 2018: Biomedical Optics Express
https://www.readbyqxmd.com/read/29759722/new-insights-into-an-old-arrhythmia-high-resolution-mapping-demonstrates-conduction-and-substrate-variability-in-right-atrial-macro-re-entrant-tachycardia
#18
Bhupesh Pathik, Geoffrey Lee, Frédéric Sacher, Pierre Jaïs, Grégoire Massoullié, Nicolas Derval, Matthew G Bates, Jonathan Lipton, Stephen Joseph, Joseph Morton, Paul Sparks, Peter Kistler, Jonathan M Kalman
OBJECTIVES: Using high-resolution 3-dimensional (3D) mapping, the aim of this study was to further characterize right atrial macro-re-entrant tachycardias and answer unresolved questions in the understanding of this arrhythmia. BACKGROUND: Despite advances in understanding of the mechanisms of right atrial macro-re-entrant tachycardias, many questions lack definitive answers. The advent of high-resolution 3D mapping provides an opportunity to gain further insights into the nature of these common circuits...
September 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29759708/intra-atrial-right-coronary-artery-and-its-ablation-implications
#19
Balaji Krishnan, Caroline Cross, Richard Dykoski, David G Benditt, Mackenzie Mbai, Edward McFalls, Jian-Ming Li, Stefan Bertog, Venkatakrishna N Tholakanahalli
OBJECTIVES: The study examined the frequency in which a right coronary artery (RCA) anomaly resulting in intra-atrialization of the vessel might increase risk of RCA damage during routine radiofrequency ablation in the right atrium even with low power or temperature. BACKGROUND: Right coronary artery (RCA) injury with endocardial RF ablation of the right atrium is a rare complication. METHODS: This prospective observational study comprised an analysis of coronary artery anatomies in 331 patients who underwent autopsies at our institution from 2005 to 2014...
September 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29759706/the-human-left-atrial-venous-circulation-as-a-vascular-route-for-atrial-pharmacological-therapies-effects-of-ethanol-infusion
#20
Miguel Valderrábano, Percy Francisco Morales, Moisés Rodríguez-Mañero, Candela Lloves, Paul A Schurmann, Amish S Dave
OBJECTIVES: This study catalogued the human venous left atrium (LA) circulation system and the ablative effects of ethanol in different branches. BACKGROUND: Vascular routes to target the LA could have significant therapeutic potential. Beyond the vein of Marshall (VOM), the fluoroscopic LA venous anatomy has not been described. METHODS: Patients undergoing ethanol infusion in the VOM as adjunctive therapy to atrial fibrillation (AF) catheter ablation were included in this study...
September 2017: JACC. Clinical Electrophysiology
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