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Right ventricular outflow tract

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https://www.readbyqxmd.com/read/28433554/catheter-ablation-to-prevent-sudden-cardiac-death
#1
Josef Kautzner, Petr Peichl
Since ventricular arrhythmias are a common cause of sudden cardiac death (SCD), treatment for ventricular arrhythmias is the target area of interest in research field. Among different means to prevent ventricular arrhythmias, catheter ablation (CA) has emerged as an effective therapeutic method. CA can decrease the likelihood of SCD in the following arrhythmia categories: 1) idiopathic ventricular fibrillation (VF) that is usually triggered by premature ventricular beats originating in the Purkinje fibres; 2) VF in subjects with structural heart disease, especially after myocardial infarction, that is triggered by premature ventricular beats from surviving Purkinje fibres; 3) Brugada syndrome in which modification of an epicardial substrate in the right ventricular outflow tract might be the most promising strategy; 4) recurrent monomorphic ventricular tachycardias in the setting of structural heart disease; 5) ventricular preexcitation in which CA appears to be a method of choice in high risk patients, regardless of the presence or absence of symptoms...
April 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28431055/electrocardiographic-differentiation-of-idiopathic-right-ventricular-outflow-tract-ectopy-from-early-arrhythmogenic-right-ventricular-cardiomyopathy
#2
Jan Novak, Alessandro Zorzi, Silvia Castelletti, Antonis Pantasis, Ilaria Rigato, Domenico Corrado, William Mckenna, Pier D Lambiase
Aims: The differentiation between idiopathic right ventricular outflow tract (RVOT) arrhythmias and early arrhythmogenic right ventricular cardiomyopathy (ARVC) can be challenging. We aimed to assess whether QRS morphological features and coupling interval of ventricular ectopic beats (VEBs) can improve differentiation between the two conditions. Methods and Results: Twenty desmosomal-gene mutation carriers (13 females, mean age 43 years) with no or mild ARVC phenotypic expression and 33 age- and sex-matched subjects with idiopathic RVOT arrhythmias were studied...
April 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28412426/unraveling-the-rv-ejection-doppler%C3%A2-envelope-insight-into-pulmonary-artery-hemodynamics-and-disease%C3%A2-severity
#3
Hiroko Takahama, Robert B McCully, Robert P Frantz, Garvan C Kane
OBJECTIVES: The purpose of this study was to characterize the profiles of right ventricular outflow tract (RVOT) Doppler flow velocity envelopes in patients with pulmonary arterial hypertension (PAH) and to establish whether changes in the RVOT flow profile related to patient outcome. BACKGROUND: The RVOT systolic flow profile is frequently abnormal, with findings of a mid-systolic flow deceleration and notching, previously proposed as an indicator of elevated pulmonary vascular resistance (PVR)...
April 7, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28408652/premature-ventricular-contraction-coupling-interval-variability-destabilizes-cardiac-neuronal-and-electrophysiological-control-insights-from-simultaneous-cardioneural-mapping
#4
David Hamon, Pradeep S Rajendran, Ray W Chui, Olujimi A Ajijola, Tadanobu Irie, Ramin Talebi, Siamak Salavatian, Marmar Vaseghi, Jason S Bradfield, J Andrew Armour, Jeffrey L Ardell, Kalyanam Shivkumar
BACKGROUND: Variability in premature ventricular contraction (PVC) coupling interval (CI) increases the risk of cardiomyopathy and sudden death. The autonomic nervous system regulates cardiac electrical and mechanical indices, and its dysregulation plays an important role in cardiac disease pathogenesis. The impact of PVCs on the intrinsic cardiac nervous system, a neural network on the heart, remains unknown. The objective was to determine the effect of PVCs and CI on intrinsic cardiac nervous system function in generating cardiac neuronal and electric instability using a novel cardioneural mapping approach...
April 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28403080/characteristics-of-diurnal-ventricular-premature-complex-variation-in-right-ventricular-outflow-tract-arrhythmias-after-catheter-ablation
#5
Shih-Jie Jhuo, Li-Wei Lo, Shih-Lin Chang, Yenn-Jiang Lin, Fa-Po Chung, Yu-Feng Hu, Tze-Fan Chao, Ta-Chuan Tuan, Jo-Nan Liao, Chin-Yu Lin, Yao-Ting Chang, Chung-Hsing Lin, Rohit Walia, Abigail Louise D Te, Shinya Yamada, Sunu Budhi Raharjo, Wei-Hua Tang, Kun-Tai Lee, Wen-Ter Lai, Shih-Ann Chen
Diurnal variations in ventricular tachyarrhythmias (VAs) have been demonstrated in idiopathic arrhythmogenic heart disease. The electrophysiological characteristics of diurnal variations in idiopathic right ventricular outflow tract (RVOT) VA have not previously been elucidated. Sixty-two consecutive patients undergoing catheter ablation for idiopathic RVOT VA (mean age: 42.8 ± 12.3 years, 35 females) were enrolled. The diurnal variation type (group 1, n = 36) was defined as those patients who had most ventricular premature contractions (VPCs) during the night hours by preprocedure Holter recordings...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28397952/aortic-valve-prolapse-misdiagnosed-as-aortic-sinus-aneurysm-in-patients-with-ventricular-septal-defect-analysis-of-the-echocardiographic-findings
#6
Guobing Hu, Xiangming Zhu, Fang Song
To retrospectively analyzed the preoperative echocardiographic findings of 9 patients with doubly committed ventricular septal defect (VSD) associated with aortic valve prolapse and to summarize the reasons for misdiagnosis. Methods: This retrospective study was conducted in Yijishan Hospital, Wannan, Anhui, Chinabetween June 2005 and May 2015. Using transthoracic echocardiography (TTE), 92 patients were diagnosed with doubly committed VSD associated with rupture of an aortic sinus aneurysm. The operative findings proved to be in accordance with the echocardiographic findings in 83 patients...
April 2017: Saudi Medical Journal
https://www.readbyqxmd.com/read/28386822/rapid-mapping-and-differentiation-in-ventricular-outflow-tract-arrhythmia-using-non-contact-mapping
#7
Kazuo Miyazawa, Marehiko Ueda, Yusuke Kondo, Tomohiko Hayashi, Miyo Nakano, Masayuki Ishimura, Masahiro Nakano, Yoshio Kobayashi
PURPOSE: Ventricular outflow tract arrhythmias (VOTAs) can be successfully treated by catheter ablation. However, it is sometimes difficult to differentiate the origin of VOTAs between the right ventricular outflow tract (RVOT) and the other sites, leading to a long fluoroscopy time and unnecessary radiofrequency applications. This study aimed to clarify distinguishable characteristics of the propagation pattern obtained from non-contact mapping (NCM) for VOTA ablation. METHODS: Consecutive 45 patients with VOTAs who underwent catheter ablation using the NCM system were included in this study...
April 6, 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/28371837/characterization-of-the-arrhythmogenic-substrate-in-patients-with-arrhythmogenic-right-ventricular-cardiomyopathy-undergoing-ventricular-tachycardia-ablation
#8
Senthil Kirubakaran, Caterina Bisceglia, John Silberbauer, Teresa Oloriz, Giulia Santagostino, Miki Yamase, Giuseppe Maccabelli, Nicola Trevisi, Paolo Della Bella
Aims: Arrhythmogenic right ventricular (RV) cardiomyopathy (ARVC) is associated with ventricular arrhythmias, even without RV structural disease. We aimed to characterize the RV substrate using electroanatomical mapping and to define outcomes following ventricular tachycardia (VT) ablation in patients with and without RV structural abnormalities. Methods and results: Twenty-nine patients with definite or suspected ARVC undergoing VT ablation were classified as 'electrical' and 'structural' cardiomyopathy based on the absence or presence of major structural criteria...
March 20, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28370558/an-unexpected-tumor-causing-right-ventricular-obstruction
#9
Jorge Padilla-Ibarra, Hugo Rodríguez Zanella, Roberto Cano Zarate, Erick Alexánderson-Rosas
A 58-year-old male with a history of a soft tissue sarcoma in remission presented with a 2 weeks history of progressive dyspnea. Transthoracic echocardiography showed right ventricular dilation; right ventricular systolic pressure (RVSP) of 110 mm Hg, and a lobulated mass in the right ventricular outflow tract (RVOT) causing obstruction. Microbubble contrast was administered showing perfusion within the mass, which suggested malignancy. A CT pulmonary angiogram (CTPA) confirmed the presence of the mass in the RVOT without evidence of pulmonary embolism...
March 30, 2017: Echocardiography
https://www.readbyqxmd.com/read/28370096/recipient-twin-circular-shunt-physiology-before-fetal-laser-surgery-survival-and-risks-for-postnatal-right-ventricular-outflow-tract-obstruction
#10
Jay D Pruetz, Jodie K Votava-Smith, Hikmat R Chmait, Lisa M Korst, Arlyn Llanes, Ramen H Chmait
OBJECTIVES: To evaluate risk for congenital heart disease (CHD) in recipient twins with circular shunt physiology (CSP). METHODS: This prospective study enrolled twin-twin transfusion syndrome (TTTS) cases from 2006 to 2015. Fetal echocardiography (FE) was performed before laser surgery when cardiac involvement was suspected. Diagnosis of recipient twin CSP required tricuspid and pulmonary regurgitation, right ventricular dysfunction, and flow reversal in the ductus arteriosus...
April 3, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28369397/significant-survival-advantage-of-high-pulmonary-vein-index-and-the-presence-of-native-pulmonary-artery-in-pulmonary-atresia-with-ventricular-septal-defect-and-major-aortopulmonary-collateral-arteries-results-from-preoperative-computed-tomography-angiography
#11
Qianjun Jia, Jianzheng Cen, Jian Zhuang, Xiaomei Zhong, Xiaoqing Liu, Jiahua Li, Changhong Liang, Meiping Huang
OBJECTIVES: The prognosis of pulmonary atresia with ventricular septal defect and major aortopulmonary collateral arteries (PA-VSD-MAPCAs) after surgery shows substantial clinical heterogeneity and predictors for outcomes are lacking. This study aimed to assess the predictive value of preoperative cardiac computed tomography angiography (CTA) for survival in patients with PA-VSD-MAPCAs. METHODS: We retrospectively analysed PA-VSD-MAPCA patients with preoperative CTA who underwent both right ventricular outflow tract reconstruction and MAPCA unifocalization ( n  = 24) or pulmonary artery rehabilitation ( n  = 28)...
March 28, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28366463/transthoracic-device-closure-of-juxtaarterial-ventricular-septal-defects-midterm-follow-up-results
#12
Xueying Song, Quansheng Xing, Qin Wu, Yueyi Ren, Hao Wan, Jun Li
BACKGROUND: In recent years, minimally invasive transthoracic device closure has been introduced as an alternative treatment option for selected patients with juxtaarterial ventricular septal defects. This study evaluated the midterm safety and efficacy of using device closure in selected patients. METHODS: Between January 2008 and December 2014, 25 patients with juxtaarterial ventricular septal defects who met the inclusion criteria were enrolled in this study...
March 30, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28366077/-multivalve-redo-surgery-in-adult-patient-with-complex-pulmonary-artesia
#13
István Hartyánszky, Barna Babik, Krisztina Kádár, Attila Tóth, László Göbölös, Gábor Bogáts
30-year-old adult with complex pulmonary atresia (previous surgical procedures: in infancy: exploration, at age of 10: ventricular septal defect closing, unifocalization, homograft implantation between right ventricular outflow tract and pulmonary artery) has biventricular dysfunction because of aortic valve regurgitation, ascending aortic aneurysm, and homograft insufficienty. Multivalve surgery: aortic valve plasty, pulmonary homograft changes for homograft and ascending aortic reconstruction by graft were carried out successfully...
April 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/28365263/percutaneous%C3%A2-palliation%C3%A2-of-right%C3%A2-ventricular-outflow-tract-obstruction-caused-by%C3%A2-metastatic-malignancy
#14
George Joseph, Sujith Thomas Chacko, Elizabeth Joseph, Vishnu Chandra Kumar
No abstract text is available yet for this article.
March 24, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28363200/evolution-of-right-ventricular-size-over-time-after-tetralogy-of-fallot-repair-a-longitudinal-cardiac-magnetic-resonance-study
#15
Tobias Rutz, Fransis Ghandour, Christian Meierhofer, Susanne Naumann, Stefan Martinoff, Rüdiger Lange, Peter Ewert, Heiko C Stern, Sohrab Fratz
Aims: It is commonly believed that pulmonary regurgitation (PR) after surgical repair of tetralogy of Fallot (TOF) leads to progressive right ventricular (RV) enlargement. However, progressive RV dilatation has never clearly been documented in this patient population. Therefore, we studied the size of the RV over time in patients after surgical TOF repair. Methods and results: Fifty-one consecutive patients after surgical TOF repair underwent at least two cardiovascular magnetic resonance (CMR) exams using a single CMR scanner...
March 1, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28362047/the-vietnamese-pig-as-a-translational-animal-model-to-evaluate-tissue-engineered-heart-valves-promising-early-experience
#16
Michele Gallo, Helen Poser, Tomaso Bottio, Antonella Bonetti, Paolo Franci, Filippo Naso, Edward Buratto, Fabio Zanella, Giovanni Perona, Carlo Dal Lin, Roberto Bianco, Michele Spina, Roberto Busetto, Maurizio Marchini, Fulvia Ortolani, Laura Iop, Gino Gerosa
Several animal models are currently used for the surgical implantation of either biologic or biopolymeric scaffolds in order to provide in vivo assessment of tissue-engineered heart valves. The Vietnamese pig (VP) is herein proposed as a suitable recipient to test the function of novel bioengineered valve substitutes, in the reconstruction of the right ventricular outflow tract (RVOT). This review aims to provide a complete and exhaustive panel of physiological parameters and methodological information for preclinical studies of tissue-engineered heart valves in the VP animal model...
March 27, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28347634/ten-year-outcomes-of-monomorphic-ventricular-tachycardia-catheter-ablation-in-repaired-tetralogy-of-fallot
#17
Mikaël Laredo, Robert Frank, Xavier Waintraub, Estelle Gandjbakhch, Laurence Iserin, Sebastien Hascoët, Caroline Himbert, Yves Gallais, Françoise Hidden-Lucet, Guillaume Duthoit
BACKGROUND: Monomorphic ventricular tachycardia (MVT) is common in adults with repaired tetralogy of Fallot (TOF), and is associated with sudden cardiac death. Management of MVT is not defined, and results of catheter ablation (CA) are limited. AIMS: To evaluate long-term outcomes of MVT CA in repaired TOF. METHODS: Thirty-four patients (mean age 32±10.3 years; 59% male) with repaired TOF underwent CA for symptomatic MVT between 1990 and 2012 in our centre; direct-current ablation (DCA) was used in 6%, radiofrequency followed by DCA in 29% and radiofrequency alone in 65%...
March 24, 2017: Archives of Cardiovascular Diseases
https://www.readbyqxmd.com/read/28344611/percutaneous-pulmonary-valve-implantation-state-of-the-art-and-polish-experience
#18
REVIEW
Elżbieta K Biernacka, Witold Rużyłło, Marcin Demkow
Percutaneous pulmonary valve implantation (PPVI) is a relatively new method of treating patients with right ventricular outflow tract (RVOT) dysfunction after surgical repair of congenital heart disease. Since its introduction in 2000 by Bonhoeffer, more than ten thousand PPVI procedures have been performed worldwide. Indications for PPVI have been adapted from those accepted for surgical intervention. Two types of valves are being used: Melody Medtronic available in diameters 16 mm and 18 mm and the family of Edwards SAPIEN valves 23, 26 and 29...
2017: Postępy W Kardiologii Interwencyjnej, Advances in Interventional Cardiology
https://www.readbyqxmd.com/read/28329461/cardiac-function-after-tetralogy-of-fallot-complete-atrioventricular-canal-repair
#19
Elizabeth H Stephens, Jennifer Tingo, Marc Najjar, Betul Yilmaz, Stéphanie Levasseur, Jeffrey D Dayton, Ralph S Mosca, Paul Chai, Jan M Quaegebeur, Emile A Bacha
BACKGROUND: Repair of complete atrioventricular canal (CAVC) with tetralogy of Fallot (TOF) is a challenging operation increasingly being performed as a complete, primary repair in infancy. Previous studies have focused on perioperative outcomes; however, midterm valve function, ventricular function, and residual obstruction have received little attention. METHODS: We retrospectively reviewed 20 patients who underwent CAVC/TOF repair (January 2005 to December 2014)...
March 2017: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/28329451/preliminary-experience-with-the-use-of-an-extracellular-matrix-to-augment-the-native-pulmonary-valve-during-repair-of-tetralogy-of-fallot
#20
Anil Dharmapuram, Nagarajan Ramadoss, Sudeep Verma, Vejendla Gouthami, Ivatury Rao
BACKGROUND: During repair of tetralogy of Fallot (TOF), when a transannular patch is needed in case of a small annulus and dysplastic pulmonary valve, we chose to reconstruct the right ventricular outflow tract by augmenting the divided anterior leaflet with an extracellular matrix (ECM) patch to produce a competent valve. In this study, we present our preliminary experience and early outcomes. METHODS: From March 2013 to December 2015, of the 206 patients who underwent primary repair of TOF, 52 required a transannular incision...
March 2017: World Journal for Pediatric & Congenital Heart Surgery
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