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Right ventricular outflow tract

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https://www.readbyqxmd.com/read/28224424/dynamic-characteristic-mechanism-of-atrial-septal-defect-using-real-time-three-dimensional-echocardiography-and-evaluation-of-right-ventricular-functions
#1
Gao-Wa Sharen, Jun Zhang, Chuan Qin, Qing Lv
The dynamic characteristics of the area of the atrial septal defect (ASD) were evaluated using the technique of real-time three-dimensional echocardiography (RT 3DE), the potential factors responsible for the dynamic characteristics of the area of ASD were observed, and the overall and local volume and functions of the patients with ASD were measured. RT 3DE was performed on the 27 normal controls and 28 patients with ASD. Based on the three-dimensional data workstations, the area of ASD was measured at P wave vertex, R wave vertex, T wave starting point, and T wave terminal point and in the T-P section...
February 2017: Journal of Huazhong University of Science and Technology. Medical Sciences
https://www.readbyqxmd.com/read/28219558/right-ventricular-hemangioma-in-the-outflow-tract-a-rare-cause-of-obstruction
#2
Amy M Young, Matthew R Danter, James S Lewis, Ben R Barton
We present a patient with a right ventricular hemangioma and symptomatic right ventricular outflow tract obstruction.
March 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28219555/right-ventricular-outflow-tract-obstruction-due-to-immunoglobulin-g4-related-disease
#3
Masaru Ishida, Taichi Sakaguchi, Shigeru Miyagawa, Hiroyuki Nishi, Yasushi Yoshikawa, Satsuki Fukushima, Ai Kawamura, Takayoshi Ueno, Hatsue Ishibashi-Ueda, Yoshiki Sawa
A 64-year-old man with extensive tumorous infiltration of the pulmonary valve underwent partial resection of a tumor of the right ventricular outflow tract and replacement of the affected valve. A diagnosis of immunoglobulin-G4 related disease of the heart was made based on the immunohistologic findings. One year after the surgical resection, growth of the tumorous mass was observed, and steroid therapy was initiated. He had no sign of tumor progression four years after the steroid therapy.
March 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28218213/surgical-treatment-of-double-outlet-right-ventricle-complicated-by-pulmonary-hypertension
#4
Qing-Yu Wu, Dong-Hai Li, Hong-Yin Li, Ming-Kui Zhang, Zhong-Hua Xu, Hui Xue
BACKGROUND: Double outlet right ventricle (DORV) is a group of complex congenital heart abnormalities. Preoperative pulmonary hypertension (PH) is considered an important risk factor for early death during the surgical treatment of DORV. The aim of this study was to report our experience on surgical treatment of DORV complicated by PH. METHODS: From June 2004 to November 2016, 61 patients (36 males and 25 females) aged 2 weeks to 26 years (median: 0.67 years and interquartile range: 0...
2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28217226/functional-characteristics-of-left-ventricular-synchronization-via-right-ventricular-outflow-tract-pacing-detected-by-two-dimensional-strain-echocardiography
#5
Yasutaka Hirayama, Yuichiro Kawamura, Nobuyuki Sato, Tatsuya Saito, Hideichi Tanaka, Yasuaki Saijo, Kenjiro Kikuchi, Katsumi Ohori, Naoyuki Hasebe
BACKGROUND: Recently, due to the detrimental effects on the ventricular function associated with right ventricular apical (RVA) pacing, right ventricular septal (RVS) pacing has become the preferred pacing method. However, the term RVS pacing refers to both right ventricular outflow-tract (RVOT) and mid-septal (RVMS) pacing, leading to a misinterpretation of the results of clinical studies. The purpose of this study, therefore, was to elucidate the functional differences of RVA, RVOT, and RVMS pacing in patients with atrioventricular block...
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28216473/five-year-results-from-a-prospective-multicentre-study-of-percutaneous-pulmonary-valve-implantation-demonstrate-sustained-removal-of-significant-pulmonary-regurgitation-improved-right-ventricular-outflow-tract-obstruction-and-improved-quality-of-life
#6
Alfred Hager, Stephan Schubert, Peter Ewert, Lars Søndergaard, Maarten Witsenburg, Paolo Guccione, Lee N Benson, José Suárez de Lezo, Te-Hsin Lung, John Hess, Andreas Eicken, Felix Berger
AIMS: Percutaneous pulmonary valve implantation (PPVI) is used to treat patients with dysfunctional pulmonary valve conduits. Short- and longer-term results from multiple trials have outlined haemodynamic improvements. Our aim was to report the long-term results, including quality of life, from a multicentre trial in Europe and Canada. METHODS AND RESULTS: From October 2007 to April 2009, 71 patients (24 female; median age 19.0 [IQR: 14.0 to 25.0] years) were enrolled in a prospective cohort study...
February 20, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28216201/intratracheal-milrinone-bolus-administration-during-acute-right-ventricular-dysfunction-after-cardiopulmonary-bypass
#7
Caroline Eva Gebhard, Georges Desjardins, Cathérine Gebhard, Paul Gavra, André Y Denault
OBJECTIVE: To evaluate intratracheal milrinone (tMil) administration for rapid treatment of right ventricular (RV) dysfunction as a novel route after cardiopulmonary bypass. DESIGN: Retrospective analysis. SETTING: Single-center study. PARTICIPANTS: The study comprised 7 patients undergoing cardiac surgery who exhibited acute RV dysfunction after cardiopulmonary bypass. INTERVENTIONS: After difficult weaning caused by cardiopulmonary bypass-induced acute RV dysfunction, milrinone was administered as a 5-mg bolus inside the endotracheal tube...
November 22, 2016: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28214505/positional-right-ventricular-obstruction-in-pectus-excavatum
#8
Katherine Underwood, Matthew Vorsanger, Muhamed Saric, Adam H Skolnick
Pectus excavatum is one of the most common congenital chest wall deformities. The degree of sternal depression, which may result in compression of the right heart by the chest wall, is variable. While typically asymptomatic, there are various symptoms that can result from severe pectus excavatum. We report on a patient with severe pectus excavatum leading to dynamic obstruction of the right ventricular outflow tract in the seated position.
January 25, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28212738/delayed-efficacy-of-radiofrequency-catheter-ablation-on-ventricular-arrhythmias-originating-from-the-left-ventricular-anterobasal-wall
#9
Ligang Ding, Bingbo Hou, Lingmin Wu, Yu Qiao, Wei Sun, Jinrui Guo, Lihui Zheng, Gang Chen, Linfeng Zhang, Shu Zhang, Yan Yao
BACKGROUND: Ventricular arrhythmias (VAs) originating from the left ventricular anterobasal wall (LV-ABW) may represent a therapeutic challenge. OBJECTIVE: The purpose of this study was to investigate the delayed efficacy of radiofrequency catheter (RFCA) ablation without an epicardial approach on VAs originating from the LV-ABW. METHODS: Eighty patients (mean age 46.9 ± 14.9 years; 47 male) with VAs originating from the LV-ABW were enrolled...
March 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28203542/robotic-trans-atrial-and-trans-mitral-ventricular-septal-resection
#10
REVIEW
W Randolph Chitwood
Localized ventricular septal hypertrophy, also known as idiopathic hypertrophic subaortic stenosis or idiopathic hypertrophic subaortic septal obstruction (IHSS), can create severe ventricular outflow obstruction. This often results in a high sub-aortic pressure gradient with potentially lethal symptoms. In 1960, Braunwald described the hemodynamic characteristics of IHSS, and thereafter, Morrow developed a trans-aortic approach to resect a large part of the ventricular septum, enlarging the outflow tract. The Morrow operation has remained the gold standard for surgically treating this pathology...
January 2017: Annals of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28194824/left-intraventricular-pressure-gradients-improvement-after-aortic-valve-replacement-in-aortic-stenosis-patients
#11
Miguel Guerra, Pedro Mendes-Ferreira, Rui Adão, Eulália Pereira, Manuela Vieira, André P Lourenço, Carmen Brás-Silva, Pedro Bastos, Luís Vouga, Adelino F Leite-Moreira
The present study was conducted to characterize left intraventicular pressure gradients, a marker of normal cardiac function, in patients with severe aortic stenosis, a condition which interferes with ventricular filling and emptying. In 10 patients (4 male; mean age 71.3 ± 4.8 years old) undergoing aortic valve replacement, 2 high-fidelity pressure catheters were inserted inside the left ventricle cavity through an apical puncture and positioned in the apex and outflow-tract below the aortic valve. Pressures were continuously acquired and gradients were calculated as apical minus outflow-tract pressure, before and immediately after aortic valve replacement...
February 14, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28194811/infundibular-pulmonary-stenosis-after-radiotherapy-for-breast-cancer
#12
Makoto Hashimoto, Ryuji Koshima, Hirosato Doi, Keijiro Mitsube
Postoperative radiotherapy for breast cancer may be associated with cardiotoxicity. We present a case of acquired infundibular pulmonary stenosis that developed 43 years after radiotherapy for left breast cancer, which necessitated a right ventricular outflow tract myectomy.
February 14, 2017: Journal of Cardiac Surgery
https://www.readbyqxmd.com/read/28185817/outcomes-following-melody-transcatheter-pulmonary-valve-implantation-for-right-ventricular-outflow-tract-dysfunction-in-repaired-congenital-heart-disease-first-reported-australian-single-centre-experience
#13
Ryan Markham, Abhinay Challa, Stephen Kyranis, Mugur Nicolae, Dale Murdoch, Michael Savage, Theresa Malpas, Dorothy J Radford, Christian Hamilton-Craig, Darren L Walters
BACKGROUND: Transcatheter pulmonary valve implantation (TPVI) with the Melody® transcatheter pulmonary valve (TPV) has demonstrated good haemodynamic and clinical outcomes in the treatment of right ventricular outflow tract (RVOT) conduit dysfunction in patients with repaired congenital heart disease CHD. We present the first Australian single centre experience of patients treated with Melody TPV. METHOD: A prospective, observational registry was developed to monitor clinical and haemodynamic outcomes in patients with RVOT dysfunction treated with the Melody TPV (Medtronic Inc, Minneapolis, United States)...
January 24, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28185706/training-induced-right-ventricular-remodelling-in-pre-adolescent-endurance-athletes-the-athlete-s-heart-in-children
#14
Flavio D'Ascenzi, Antonio Pelliccia, Francesca Valentini, Angela Malandrino, Benedetta Maria Natali, Riccardo Barbati, Marta Focardi, Marco Bonifazi, Sergio Mondillo
AIMS: Little is known about the adaptation of the right ventricle (RV) to endurance exercise in children. The aim of this study was to assess the effects of 5months of intensive training on RV morphology and function in preadolescent endurance athletes. METHODS: Ninety-four children were evaluated in this study. Fifty-seven male competitive swimmers (aged 10.8±0.2years) were evaluated before (baseline) and after 5months of the training (peak-training), and compared to 37 age- and sex-matched non-athlete children evaluated at baseline and after 5months of natural growth...
January 27, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28184198/local-left-ventricular-epicardial-j-waves-and-late-potentials-in-brugada-syndrome-patients-with-inferolateral-early-repolarization-pattern
#15
Satoshi Nagase, Masamichi Tanaka, Hiroshi Morita, Koji Nakagawa, Tadashi Wada, Masato Murakami, Nobuhiro Nishii, Kazufumi Nakamura, Hiroshi Ito, Tohru Ohe, Kengo F Kusano
Background: Brugada syndrome (BrS) is characterized by J-point or ST-segment elevation on electrocardiograms (ECGs) and increased risk of ventricular fibrillation (VF). In BrS, epicardial depolarization abnormality with delayed potential on the right ventricular outflow tract is reportedly the predominant mechanism underlying VF. Yet VF occurrence is also associated with early repolarization (ER) pattern in the inferolateral ECG leads, which may represent the inferior and/or left lateral ventricular myocardium...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28180102/concomitant-right-ventricular-outflow-tract-cryoablation-during-pulmonary-valve-replacement-in-a-patient-with-tetralogy-of-fallot
#16
Hong Ju Shin, Seunghwan Song, Yu Rim Shin, Han Ki Park, Young Hwan Park
A 38-year-old female patient with a history of tetralogy of Fallot repair at 10 years of age underwent pulmonary valve replacement with a mechanical prosthesis, tricuspid annuloplasty, and right ventricular outflow tract cryoablation due to pulmonary regurgitation, tricuspid regurgitation, and multiple premature ventricular contractions with sustained ventricular tachycardia. After surgery, she had an uneventful postoperative course with arrhythmia monitoring. She was discharged without incident, and a follow-up Holter examination showed a decrease in the number of ventricular ectopic beats from 702 to 41...
February 2017: Korean Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28163423/mechanism-of-valve-failure-and-efficacy-of-reintervention-through-catheterization-in-patients-with-bioprosthetic-valves-in-the-pulmonary-position
#17
Ryan Callahan, Lisa Bergersen, Christopher W Baird, Diego Porras, Jesse J Esch, James E Lock, Audrey C Marshall
BACKGROUND: Surgical and transcatheter bioprosthetic valves (BPVs) in the pulmonary position in patients with congenital heart disease may ultimately fail and undergo transcatheter reintervention. Angiographic assessment of the mechanism of BPV failure has not been previously described. AIMS: The aim of this study was to determine the mode of BPV failure (stenosis/regurgitation) requiring transcatheter reintervention and to describe the angiographic characteristics of the failed BPVs and report the types and efficacy of reinterventions...
January 2017: Annals of Pediatric Cardiology
https://www.readbyqxmd.com/read/28163422/transcatheter-pulmonary-valve-perforation-using-chronic-total-occlusion-wire-in-pulmonary-atresia-with-intact-ventricular-septum
#18
Shweta Bakhru, Shilpa Marathe, Manish Saxena, Sudeep Verma, Rajan Saileela, Tapan K Dash, Nageswara Rao Koneti
BACKGROUND: Perforation of pulmonary valve using radiofrequency ablation in pulmonary atresia with intact ventricular septum (PA IVS) is a treatment of choice. However, significant cost of the equipment limits its utility, especially in the developing economies. OBJECTIVE: To assess the feasibility, safety, and efficacy of perforation of pulmonary valve using chronic total occlusion (CTO) wires in patients with PA IVS as an alternative to radiofrequency ablation...
January 2017: Annals of Pediatric Cardiology
https://www.readbyqxmd.com/read/28155117/update-on-the-management-of-adults-with-arterial-switch-procedure-for-transposition-of-the-great-arteries
#19
REVIEW
Lucy M Safi, Ami B Bhatt
The arterial switch operation (ASO) is now the most frequently performed surgical correction in individuals with dextro-transposition of the great arteries (D-TGA). Patients who undergo this procedure as neonates have overall good clinical outcomes yet continued clinical follow-up is important to evaluate for postoperative complications. In this group, the highest mortality is in the immediate postoperative period and is generally associated with reimplantation of the coronary arteries. As these patients live into adulthood, longitudinal follow-up for other ASO complications including neo-pulmonary stenosis, right ventricular outflow tract (RVOT) obstruction, or neo-aortic root dilation and resulting aortic insufficiency should be performed...
January 2017: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28154913/right-ventricle-to-pulmonary-artery-shunt-in-pulmonary-atresia-with-a-ventricular-septal-defect-a-word-of-caution
#20
Kwang Ho Choi, Si Chan Sung, Hyungtae Kim, Hyoung Doo Lee, Gil Ho Ban, Geena Kim, Hoon Ko
The management of pulmonary atresia with a ventricular septal defect (PA/VSD) depends on the anatomy of the pulmonary artery or on the surgical strategy used at individual institutions. In our institution, we adopted a right ventricle-to-pulmonary artery (RV-PA) shunt in 2011 as a palliative procedure for PA/VSD to overcome the disadvantages of a Blalock-Taussig shunt. We evaluated the results of the RV-PA shunt as initial palliative surgery for PA/VSD. Thirteen patients with ductus-dependent PA/VSD from August 2011 to August 2015 were enrolled...
February 3, 2017: Pediatric Cardiology
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