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Right Ventricle

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https://www.readbyqxmd.com/read/29155385/local-low-dose-urokinase-thrombolysis-for-the-management-of-hemodynamically-stable-pulmonary-embolism-with-right-ventricular-dysfunction
#1
Sara Alcántara Carmona, Marina Pérez Redondo, Luis Nombela Franco, Rocío González Costero, Bárbara Balandín Moreno, Miguel Valdivia de la Fuente, Santiago Méndez Alonso, Agustín García Suárez, Ana Royuela
AIMS: To evaluate the effectiveness of local low-dose urokinase thrombolysis (LLDUT) in hemodynamically stable pulmonary embolism with right ventricular dysfunction (RVD). METHODS AND RESULTS: Prospective study. LLDUT with a 200,000 IU bolus followed by a 100,000 IU/h infusion. Treatment duration was determined through radiological control performed 48-72h into treatment. Follow-up echocardiogram was performed within seven days after LLDUT completion. Evolution of thrombus burden, pulmonary artery pressures (PAP) and RVD were studied, and hemorrhagic complications and mortality were recorded...
November 21, 2017: EuroIntervention
https://www.readbyqxmd.com/read/29154821/heterotaxy-syndrome-and-associated-arrhythmias-in-pediatric-patients
#2
Mary C Niu, Heather A Dickerson, Judson A Moore, Caridad de la Uz, Santiago O Valdés, Jeffrey J Kim, David E Bard, Shaine A Morris, Christina Y Miyake
BACKGROUND: Heterotaxy Syndrome (HS) is a rare disorder with complex anatomy involving misarrangements of the cardiac conduction system. Arrhythmias may be related to anatomic variations and contribute to morbidity. OBJECTIVE: This study investigated the associations between arrhythmias, anatomy, and outcomes in a large HS cohort. METHODS: A single center retrospective review of patients diagnosed with HS ≤ 21 years of age was performed...
November 14, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29153849/cutting-balloon-and-high-pressure-balloon-dilation-for-palliative-treatment-of-congenital-double-chambered-right-ventricle-and-primary-infundibular-stenosis-in-a-golden-retriever-dog
#3
Karsten E Schober, Jaylyn Rhinehart, Rebecca Kohnken, John D Bonagura
Combined cutting balloon and high-pressure balloon dilation was performed in a dog with a double-chambered right ventricle and severe infundibular stenosis of the right ventricular outflow tract. The peak systolic pressure gradient across the stenosis decreased by 65% after dilation (from 187 mmHg before to 66 mmHg after) affirming the intervention as successful. However, early re-stenosis occurred within 3 months leading to exercise intolerance, exercise-induced syncope, and right-sided congestive heart failure...
November 16, 2017: Journal of Veterinary Cardiology: the Official Journal of the European Society of Veterinary Cardiology
https://www.readbyqxmd.com/read/29153816/a-decreased-preload-due-to-a-loaded-stomach-a-rare-presentation-of-a-paraesophageal-hernia
#4
Rens A van der Linde, Seilenna S Lases, Thomas J Buist, Henderik L van Westreenen, Vincent B Nieuwenhuijs
A hiatal hernia is a condition in which intraabdominal content herniates into the intrathoracic cavity. On rare occasions, a hiatal hernia can lead to cardiorespiratory compromise. We report a case of chest pain followed by cardiac arrest in a patient not known to have hiatal hernia, and without preliminary symptoms. The patient was suspected of having cardiac ischemia; however, angiography did not reveal any abnormalities. Chest tomography revealed a large paraesophageal hernia with compression of the right ventricle causing decreased preload and cardiac output...
December 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29151526/recent-inferior-myocardial-infarction-complicated-with-a-right-ventricular-thrombus-detected-by-three-cardiac-imaging-modalities
#5
Toshiki Kuno, Syohei Imaeda, Kenji Hashimoto, Toshinobu Ryuzaki, Tetsuya Saito, Hiroyuki Yamazaki, Ryota Tabei, Masaki Kodaira, Manabu Hase, Yohei Numasawa
We report the case of a 71-year-old woman diagnosed with recent inferior myocardial infarction complicated with right ventricular infarction and a right ventricular thrombus. Three-dimensional transthoracic echocardiography, contrast-enhanced computed tomography, and cardiac magnetic resonance imaging clearly detected a thrombus. We consider cases with a recent right ventricular infarction to require assessment for thrombus formations in the right ventricle. Fortunately, vigorous anticoagulation therapy resolved the thrombi in both the right ventricle and right coronary artery...
November 20, 2017: Internal Medicine
https://www.readbyqxmd.com/read/29151486/factors-for-c-kit-expression-in-cardiac-outgrowth-cells-and-human-heart-tissue
#6
Satoshi Matsushita, Kazuo Minematsu, Taira Yamamoto, Hirotaka Inaba, Kenji Kuwaki, Akie Shimada, Yasutaka Yokoyama, Atsushi Amano
We determined the factors associated with the expression of c-kit in the heart and the proliferation of c-kit-positive (c-kit(pos)) cardiac stem cells among the outgrowth cells cultured from human cardiac explants.Samples of the right atrium (RA), left atrium (LA), and left ventricle obtained from patients during open-heart surgery were processed for cell culture of outgrowth cells and tissue analysis. The total number of growing cells and the population of c-kit(pos) cells were measured and compared with c-kit expression in native tissues and characteristics of the patients according to the region of the heart...
November 17, 2017: International Heart Journal
https://www.readbyqxmd.com/read/29151120/biomechanical-stress-in-myocardial-infarctions-can-endothelin-1-and-growth-differentiation-factor-15-serve-as-immunohistochemical-markers
#7
M Falk, R Huhn, F Behmenburg, St Ritz-Timme, F Mayer
Myocardial infarctions go along with biomechanical stress, i.e. stretching of muscle fibres, and the expression of certain marker molecules. We tested if two of those markers, endothelin-1 (ET-1) and growth differentiation factor 15 (GDF-15), can be used as immunohistochemical markers for myocardial ischaemia/infarctions. The study included experiments with an animal model, the isolated perfused Langendorff heart, as well as the investigation of human tissue samples drawn during autopsies. The overall picture of our results showed that GDF-15 is very sensitive and expressed very fast, not only as a consequence of ischaemia/infarctions, but also under other circumstances...
November 18, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/29150982/visualization-within-the-ventricles-of-the-brain-a-micro-focus-x-ray-study
#8
Edwin John de Jager, André Francois du Plessis, Jakobus Willem Hoffman, Anna Catherina Oettlé, Marius Casparus Bosman
Conceptualization of the ventricular system of the brain by macroscopic studies is complicated by the lack of physical structure of these interconnected cavities. Dissection procedures designed to display the structures in the walls of the ventricles are destructive and not conducive for the appreciation of the ventricular system in its entirety. The application of Micro-focus X-ray tomography affords the possibility to appreciate hidden structures in a non-destructive manner. The aim of this study was to explore the possibility of using micro-focus X-ray tomography in the three-dimensional (3D) visualization of the ventricular system as well as the various neuroanatomical structures within its walls for educational purposes...
November 18, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29148310/biventricular-repair-of-double-outlet-right-ventricle-preoperative-echocardiography-and-surgical-outcomes
#9
Hong Meng, Kun-Jing Pang, Shou-Jun Li, David Hsi, Jun Yan, Sheng-Shou Hu, Zhong-Dong Hua, Hao Wang
OBJECTIVE: To discuss the key anatomic features of double outlet right ventricle (DORV) assessed by preoperative echocardiography among patients treated with different types of biventricular repair. METHODS: Surgical and echocardiographic databases were queried to identify patients who had undergone biventricular repair for DORV and had adequate preoperative echocardiographic imaging. All patients underwent pre- and postoperative echocardiography and clinical evaluation following discharge...
May 2017: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/29148067/should-theophylline-be-added-to-the-j-wave-syndrome-therapeutic-armamentarium
#10
EDITORIAL
Charles Antzelevitch, Sami Viskin
The substrate for both early repolarization syndrome (ERS) and Brugada syndrome (BrS), the so-called J wave syndromes, has been shown to develop as a consequence of genetic variants causing a loss of function of inward currents such sodium (INa ) and calcium (ICa ) channel currents or a gain of function in outward currents such as the transient outward current (Ito ). These changes in ion channel function result in an outward shift of the balance of currents active during the early phases of the epicardial action potential in the right ventricular outflow tract (RVOT) of the heart in the case BrS and in the inferior left ventricle in the case of ERS...
November 16, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29146527/osthole-attenuates-right-ventricular-remodeling-via-decreased-myocardial-apoptosis-and-inflammation-in-monocrotaline-induced-rats
#11
Yeli Li, Yiqi Li, Fuguo Shi, Lina Wang, Lisheng Li, Danli Yang
Osthole (Ost) is a coumarin that exhibits wide pharmacological effects in the cardiovascular system. However, whether Ost can inhibit apoptosis and inflammation in right ventricle (RV) cardiomyocytes and prevent RV remodeling is not clear. This study was designed to investigate the effect of Ost on RV remodeling and the underlying mechanism. By applying a monocrotaline (MCT)-induced rat model, the effect of Ost on RV remodeling was investigated. Rats were given a single dose of MCT (50mg⁄kg) subcutaneously (s...
November 13, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29146416/fulminant-adrenergic-myocarditis-complicated-by-pulmonary-edema-cardiogenic-shock-and-cardiac-arrest
#12
Pawel Rostoff, Bohdan Nessler, Patrycja Pikul, Karolina Golinska-Grzybala, Tomasz Miszalski-Jamka, Jadwiga Nessler
Adrenergic myocarditis is an uncommon presentation of pheochromocytoma and extremely rare cause of de novo acute heart failure (AHF). We present a case of a 31-year-old Caucasian woman with a history of hypertension and recurrent occipital headaches who was admitted to the emergency department due to severe de novo AHF presenting as pulmonary edema and cardiogenic shock. During the hospital admission the patient experienced asystolic cardiac arrest and was successfully resuscitated, intubated, and mechanically ventilated...
November 10, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29146275/beat-to-beat-variations-in-activation-recovery-interval-derived-from-the-right-ventricular-electrogram-can-monitor-arrhythmic-risk-under-anesthetic-and-awake-conditions-in-the-canine-chronic-atrioventricular-block-model
#13
Sofieke C Wijers, David J Sprenkeler, Alexandre Bossu, Albert Dunnink, Jet D M Beekman, Rosanne Varkevisser, Alfonso Aranda Hernández, Mathias Meine, Marc A Vos
BACKGROUND: In the chronic atrioventricular block (CAVB) dog model, beat-to-beat variation of repolarization in the left ventricle (LV) quantified as short-term variability of the left monophasic action potential duration (STVLVMAPD) increases abruptly upon challenge with a pro arrhythmic drug. This increase occurs before the first ectopic beat (EB), specifically in subjects that demonstrate subsequent repetitive Torsade de Pointes arrhythmias (TdP). OBJECTIVE: Demonstrate that STV is feasible to monitor arrhythmic risk through the use of the intracardiac electrogram (EGM) derived from the right ventricle (RV) lead from pacemakers or implantable cardioverter defibrillators (ICD)...
November 13, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29145264/influences-of-cardiac-motion-on-computed-tomography-guided-biopsy-of-lung-nodules-located-near-the-heart
#14
Li-Sheng Hsu, Chien-Wei Chen, Chia-Hao Chang, Chien-Han Liao, Sheng-Lung Hsu, Wei-Ming Lin
Computed tomography (CT)-guided lung biopsy of nodules located near the heart may be associated with potential complications. To understand the influences of cardiac motion on lung parenchyma during biopsy, we processed the cardiac phase images of coronary CT angiography (CCTA) and noticed shifts in mediastinum lung margin (MLM) at different zones.Thirty eight CCTA (27 men and 11 women) were retrospectively evaluated. Image processing was done with Fiji (an open source Java image processing program by Fiji contributors) using 10% to 90% phase images of CCTA; and tissue displacement (MLM shift) was shown on the resulting images...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29143975/sustained-cardiac-programming-by-short-term-juvenile-exercise-training-in-male-rats
#15
Y Asif, M E Wlodek, M J Black, A P Russell, P F Soeding, G D Wadley
The aim of this study was to investigate if endurance training during juvenile life 'reprograms' the heart and leads to sustained improvements in the structure, function, and morphology of the adult heart. Male Wistar Kyoto rats were exercise trained 5 days/week for four weeks in either juvenile (5-9 weeks of age), adolescent (11-15 weeks of age) or adult life (20-24 weeks of age). Juvenile exercise training, when compared to 24 week old sedentary rats, led to sustained increases in left ventricle (LV) mass (+18%; P < 0...
November 16, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/29143659/effect-of-heartworm-disease-and-heartworm-associated-respiratory-disease-hard-on-the-right-ventricle-of-cats
#16
Randolph L Winter, A Ray Dillon, Russell C Cattley, Byron L Blagburn, D Michael Tillson, Calvin M Johnson, William R Brawner, Elizabeth G Welles, Sharon Barney
BACKGROUND: Dirofilaria immitis infection occurs in dogs and cats, both of which species are clinically affected by mature adult infections. Cats are uniquely affected by immature-adult infections with an inflammatory pulmonary disease called Heartworm-Associated Respiratory Disease (HARD). D. immitis infection causes pulmonary parenchymal and vascular pathology in the dog and cat. Dogs develop pulmonary hypertension and cor pulmonale, whereas the development of pulmonary hypertension is rare in the cat...
November 9, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29143137/segmental-biventricular-analysis-of-myocardial-function-using-high-temporal-and-spatial-resolution-tissue-phase-mapping
#17
Marius Menza, Daniela Föll, Jürgen Hennig, Bernd Jung
OBJECTIVE: Myocardial dysfunction of the right ventricle (RV) is an important indicator of RV diseases, e.g. RV infarction or pulmonary hypertension. Tissue phase mapping (TPM) has been widely used to determine function of the left ventricle (LV) by analyzing myocardial velocities. The analysis of RV motion is more complicated due to the different geometry and smaller wall thickness. The aim of this work was to adapt and optimize TPM to the demands of the RV. MATERIALS AND METHODS: TPM measurements were acquired in 25 healthy volunteers using a velocity-encoded phase-contrast sequence and kt-accelerated parallel imaging in combination with optimized navigator strategy and blood saturation...
November 15, 2017: Magma
https://www.readbyqxmd.com/read/29142817/an-unusual-case-of-aortic-right-atrium-fistula-a-diagnostic-and-therapeutic-challenge
#18
Maria Chiara Todaro, Alessandro Aprile, Adriana Ravera, Gaetano Senatore
An aorta-to-right atrium (RA) fistula is an anomalous communication between the ascending or descending thoracic aorta and the RA. In this report, we describe a case of an idiopathic aortic root-to-RA fistula occasionally found during a coronary angiography performed in a young patient admitted for acute chest pain with evidence of multivessel coronary artery disease. The anatomical peculiarity of this fistulous communication is that it gave origin to collateral vessels furnishing the inferolateral wall of the left ventricle...
October 2017: Journal of Cardiovascular Echography
https://www.readbyqxmd.com/read/29142814/a-membranous-septal-aneurysm-causing-right-ventricular-outflow-tract-obstruction-in-an-adult
#19
Fiorella Privitera, Ines Paola Monte, Antonino Indelicato, Corrado Tamburino
We describe a case of a 69-year-old female referred for the evaluation of exertional dyspnea, with a small membranous ventricular septal defect (VSD) and right ventricle (RV) outflow tract obstruction. Using transthoracic echo was diagnosed VSD with left to right shunting and transesophageal echo (TEE) was used to a better anatomical characterization. TEE showed a perimembranous subaortic VSD that developed a high-velocity flow in RV. Pulmonary valve appears normal and right ventricular infundibular hypertrophy or double-chambered RV was excluded from the study...
October 2017: Journal of Cardiovascular Echography
https://www.readbyqxmd.com/read/29141964/acute-decompensated-pulmonary-hypertension
#20
Laurent Savale, Jason Weatherald, Xavier Jaïs, Constance Vuillard, Athénaïs Boucly, Mitja Jevnikar, David Montani, Olaf Mercier, Gerald Simonneau, Elie Fadel, Olivier Sitbon, Marc Humbert
Acute right heart failure in chronic precapillary pulmonary hypertension is characterised by a rapidly progressive syndrome with systemic congestion resulting from impaired right ventricular filling and/or reduced right ventricular flow output. This clinical picture results from an imbalance between the afterload imposed on the right ventricle and its adaptation capacity. Acute decompensated pulmonary hypertension is associated with a very poor prognosis in the short term. Despite its major impact on survival, its optimal management remains very challenging for specialised centres, without specific recommendations...
December 31, 2017: European Respiratory Review: An Official Journal of the European Respiratory Society
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