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ventricle tachycardia

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https://www.readbyqxmd.com/read/29150491/hypothermia-modulates-arrhythmia-substrates-during-different-phases-of-resuscitation-from-ischemic-cardiac-arrest
#1
Joseph S Piktel, Aurelia Cheng, Matthew McCauley, Zack Dale, Michelle Nassal, Danielle Maleski, Gary Pawlowski, Kenneth R Laurita, Lance D Wilson
BACKGROUND: We designed an innovative porcine model of ischemia-induced arrest to determine dynamic arrhythmia substrates during focal infarct, global ischemia from ventricular tachycardia or fibrillation (VT/VF) and then reperfusion to determine the effect of therapeutic hypothermia (TH) on dynamic arrhythmia substrates and resuscitation outcomes. METHODS AND RESULTS: Anesthetized adult pigs underwent thoracotomy and regional plunge electrode placement in the left ventricle...
November 17, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29147786/risk-factors-for-development-of-ectopic-atrial-tachycardia-in-post-operative-congenital-heart-disease
#2
Bradley C Clark, John T Berger, Charles I Berul, Richard A Jonas, Jonathan R Kaltman, Julianne Lapsa, Dilip S Nath, Elizabeth D Sherwin, Pranava Sinha, David Zurakowski, Jeffrey P Moak
Ectopic atrial tachycardia (EAT) is common in surgically repaired congenital heart disease (CHD) and carries the potential for significant hemodynamic compromise. Our objective was to determine the incidence, and risk factors of EAT after CHD surgery. Prospective study of patients that underwent surgery for CHD from February to October 2016 was performed. Demographic, perioperative and electrophysiologic data were collected. Sustained EAT (> 30 s) was documented by telemetry or electrocardiogram and confirmed by a pediatric electrophysiologist...
November 17, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/29137910/tamponade-hemodynamic-and-echocardiographic-diagnosis
#3
REVIEW
Mark J Kearns, Keith R Walley
Cardiac tamponade is a medical emergency that can be readily reversed with timely recognition and appropriate intervention. The clinical diagnosis of cardiac tamponade requires synthesis of a constellation of otherwise non-specific features, based on an understanding of the underlying pathophysiology. Whereas echocardiographic examination is a central component of diagnosis, alone it is insufficient to establish the physiologic diagnosis of hemodynamically significant cardiac tamponade. The hemodynamic diagnosis of cardiac tamponade requires clinical evidence of low cardiac output and stroke volume in the setting of elevated cardiac filling pressures, with evidence of increased sympathetic tone (tachycardia, peripheral vasoconstriction, etc), and exclusion of other causes of shock as the primary problem (particularly cardiogenic shock)...
November 11, 2017: Chest
https://www.readbyqxmd.com/read/29127709/pulmonary-damage-following-right-ventricular-outflow-tachycardia-ablation-in-a-child-when-electroanatomical-mapping-isn-t-good-enough
#4
Neha Bansal, Daisuke Kobayashi, Peter P Karpawich
A 14-year-old female was referred for severe pulmonary valve insufficiency after undergoing radiofrequency ablation for a right ventricular outflow tract tachycardia that originated in the proximal pulmonary artery at 10 years of age. Clinical records indicated that ablation was guided solely by electrograms and electroanatomical mapping. Due to myocardial tissue extensions, mapping failed to identify the level of the pulmonary valve annulus, which resulted in delivery of energy on the valve proper and into the pulmonary artery...
November 11, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29113751/cardiomyopathy-induced-by-incessant-ventricular-tachycardia-originating-in-the-vicinity-of-the-his-bundle
#5
Sana Ouali, Manel Ben Halima, Selim Boudiche, Anissa Gharbi, Khedher Nadim, Kaouthar Hakim, Fatma Ouarda, Mohamed Sami Mourali
A 04-year-old boy was referred to our institution with severe, progressive heart failure of 4-months duration associated with a persistent wide QRS tachycardia with left bundle branch block and severe left ventricular dysfunction. Because of incessant wide QRS tachycardia refractory to antiarrhythmic drugs, he was referred for electrophysiological study. The ECG was suggestive of VT arising from the right ventricle near the His area. Electrophysiological study revealed that origin of tachycardia was septum of the right ventricle, near His bundle, however the procedure was not successful and an inadvertent complete atrioventricular conduction block occurred...
November 4, 2017: Indian Pacing and Electrophysiology Journal
https://www.readbyqxmd.com/read/29101288/increased-cardiac-arrhythmogenesis-associated-with-gap-junction-remodeling-with-upregulation-of-rna-binding-protein-fxr1
#6
Miensheng Chu, Stefanie Mares Novak, Cathleen Cover, Anne A Wang, Ikeotunye Royal Chinyere, Elizabeth Juneman, Daniela C Zarnescu, Pak Kin Wong, Carol Gregorio
Background -Gap junction remodeling is well established as a consistent feature of human heart disease involving spontaneous ventricular arrhythmia. The mechanisms responsible for gap junction remodeling that include alterations in the distribution of, and protein expression within, gap junctions are still debated. Studies reveal that multiple transcriptional and post-transcriptional regulatory pathways are triggered in response to cardiac disease, such as those involving RNA-binding proteins. The expression levels of Fragile X mental retardation autosomal homolog 1 (FXR1), an RNA-binding protein, are critical to maintain proper cardiac muscle function; however, the connection between FXR1 and disease is not clear...
November 3, 2017: Circulation
https://www.readbyqxmd.com/read/29093566/hypertension-induces-additional-cardiometabolic-impairments-and-attenuates-aerobic-exercise-training-adaptations-in-fructose-fed-ovariectomized-rats
#7
Janaina de O Brito-Monzani, Iris Callado Sanches, Nathalia Bernardes, Kátia Ponciano, Ivana C Moraes-Silva, Maria-Cláudia Irigoyen, Susana Llesuy, Kátia De Angelis
We tested whether hypertension favors the development of additional cardiometabolic changes in fructose-fed ovariectomized rats and how it affects aerobic exercise training (ET) effects. All rats received fructose in drinking water (10%) beginning at weaning, were ovariectomized at 10 weeks of age and divided into the normotensive sedentary (NFOS) and trained (NFOT) and hypertensive sedentary (HFOS) and trained (HFOT) groups. ET was performed on a treadmill. Arterial pressure (AP) was directly recorded; heart rate and AP variabilities were analyzed...
November 2, 2017: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/29071741/is-right-atrioventricular-valve-always-tricuspid
#8
Ahmet Guner, Alev Kılıcgedik, Muzaffer Kahyaoglu, Mehmet Celik, Gokhan Kahveci
A 71-year-old male with a medical history of hypertension was admitted to emergency department with hypertensive pulmonary edema. The patient appeared anxious and diaphoretic, and physical examination revealed tachypnea, crepitant rales in the both lungs and a systolic ejection murmur at the right sternal border, radiating to the both carotid arteries. The electrocardiography showed sinus tachycardia with indications of left ventricle hypertrophy Before the aortic valve surgery, transesophageal echocardiography (TEE) was performed for detailed evaluation of the aortic valve...
October 26, 2017: Echocardiography
https://www.readbyqxmd.com/read/29026415/two-cases-of-parachute-tricuspid-valve-confirmed-by-three-dimensional-echocardiography
#9
Hedieh Alimi, Afsoon Fazlinezhad
BACKGROUND: Parachute tricuspid valve is a rare congenital malformations explained in the literature. In most cases, this malformation coexists with other congenital defects. The importance of this condition depends on its functional consequences. CASE REPORT: First case was a 52-year-old female patient presented with palpitation. She had a history of paroxysmal supraventricular tachycardia. Transthoracic echocardiography revealed large secundum type atrial septal defect and all the tricuspid valve leaflets appeared to be connected to a single calcified papillary muscle in right ventricle suggestive of parachute tricuspid valve...
March 2017: ARYA Atherosclerosis
https://www.readbyqxmd.com/read/29016882/intra-atrial-re-entrant-tachycardia-in-patients-with-congenital-heart-disease-factors-associated-with-disease-severity
#10
Ivo Roca-Luque, Nuria Rivas Gándara, Laura Dos Subirà, Jaume Francisco Pascual, Jordi Pérez-Rodon, Antònia Pijuan Domenech, Ma Teresa Subirana, Berta Miranda, Alba Santos Ortega, Jaume Casaldàliga Ferrer, David García-Dorado García, Angel Moya Mitjans
Aim: Intra-atrial re-entrant tachycardia (IART) is a common complication in patients with congenital heart disease (CHD) and is related to increased morbidity and mortality. Few reports have been published about factors associated to IART severity. The aim of this study is to analyse factors associated to severe clinical presentation of IART. Methods and Results: Observational study of all consecutive CHD patients who underwent a first IART ablation from January 2009 to December 2015 (94 patients, 39...
July 28, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28979908/epicardial-ablation-of-ventricular-tachycardia-in-a-patient-with-arrhythmogenic-right-ventricular-dysplasia-after-failed-conventional-endocardial-ablation-a-case-for-remote-navigation-with-functional-image-integration
#11
Sabine Ernst, Karine Roy, Eric Lim, Glyn Thomas
Arrhythmogenic right ventricular dysplasia (ARVD) is an inheritable heart muscle disease that predominantly affects the right ventricle (RV) and predisposes to ventricular arrhythmias and sudden cardiac death (SCD)(1). The natural history is predominantly related to ventricular electric instability which may lead to arrhythmic SCD, mostly in young people and athletes(2,3), but may progress with significant RV muscle disease and left-ventricular (LV) involvement and can result in right or biventricular heart failure(4)...
December 30, 2016: Global Cardiology Science & Practice
https://www.readbyqxmd.com/read/28912181/hypertrophic-cardiomyopathy-genetics-pathogenesis-clinical-manifestations-diagnosis-and-therapy
#12
REVIEW
Ali J Marian, Eugene Braunwald
Hypertrophic cardiomyopathy (HCM) is a genetic disorder that is characterized by left ventricular hypertrophy unexplained by secondary causes and a nondilated left ventricle with preserved or increased ejection fraction. It is commonly asymmetrical with the most severe hypertrophy involving the basal interventricular septum. Left ventricular outflow tract obstruction is present at rest in about one third of the patients and can be provoked in another third. The histological features of HCM include myocyte hypertrophy and disarray, as well as interstitial fibrosis...
September 15, 2017: Circulation Research
https://www.readbyqxmd.com/read/28899955/natural-history-and-clinical-predictors-of-atrial-tachycardia-in-adults-with-congenital-heart-disease
#13
Pablo Ávila, José María Oliver, Pastora Gallego, Ana González-García, María José Rodríguez-Puras, Esther Cambronero, José Ruiz-Cantador, Ana Campos, Rafael Peinado, Raquel Prieto, Fernando Sarnago, Raquel Yotti, Francisco Fernández-Avilés
BACKGROUND: Atrial tachycardias (ATs) are a significant source of morbidity in adults with congenital heart disease (CHD). This study evaluates the incidence and clinical predictors of AT in a cohort of patients with CHD. METHODS AND RESULTS: We included 3311 adults (median age at entry 22.6 years, 50.6% males) with CHD (49% simple, 39% moderate, and 12% complex) prospectively followed up in a tertiary center for 37 607 person-years. Predictors of AT were identified by multivariable Cox regression analysis accounting for left truncation...
September 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28884991/acute-cardiac-disease-in-a-patient-with-hyper-ige-syndrome
#14
A Castilano, H Watti, A Abdulbaki, K Modi, J A Bocchini, S L Bahna
We describe the case of a 24-year-old male with hyper-IgE syndrome (HIES) which was diagnosed at 4 years of age and died from a very rare cardiac complication. He had typical clinical and laboratory manifestations of HIES, including total serum IgE as high as > 100,000 IU/mL. Stem cell transplantation was not available. During the 20-year follow-up, he suffered numerous various infections of the skin and deep organs, partial lung resection, as well as multiple bone fractures. At age 24, he developed acute decompensated heart failure associated with elevated serum troponin I and brain natriuretic protein...
September 2017: European Annals of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28878587/arrhythmogenic-right-ventricular-cardiomyopathy-in-an-endurance-athlete-presenting-with-ventricular-tachycardia-and-normal-right-ventricular-function
#15
Jeffrey S Hedley, Ibhar Al Mheid, Zoubin Alikhani, Maria A Pernetz, Jonathan H Kim
Arrhythmogenic right ventricular cardiomyopathy, a genetically inherited disease that results in fibrofatty replacement of normal cardiac myocytes, has been associated with sudden cardiac death in athletes. Long-term participation in endurance exercise hastens the development of both the arrhythmic and structural arrhythmogenic right ventricular cardiomyopathy phenotypes. We describe the unusual case of a 34-year-old, symptomatic, female endurance athlete who had arrhythmogenic right ventricular cardiomyopathy in the presence of a structurally normal right ventricle...
August 2017: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/28858113/extraction-of-a-dual-chamber-pacemaker-and-inserting-of-a-new-automatic-implantable-cardioverter-defibrillator-the-easy-procedure-almost-became-catastrophic-a-case-report
#16
Márcio Galindo Kiuchi, Guilherme Miglioli Lobato, Shaojie Chen
BACKGROUND: The cardiovascular illnesses are in the middle of the foremost reasons of death around the world. Deaths in Europe, from sudden cardiac death (SCD), reach nearby 700,000 individuals every year. In the United States, statistics point to the existence of nearly 1 million yearly deaths from cardiovascular sickness, of which 330,000 are the consequence of abrupt. The significance of automatic implantable cardioverter-defibrillator (ICD) has been proven in subjects with preceding myocardial infarction and stark systolic left ventricular dysfunction (secondary prevention)...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28843747/arrhythmogenic-right-ventricular-cardiomyopathy-arvc-in-a-young-female-athlete-at-36-weeks-gestation-a-case-report
#17
Hae Yoon Grace Choung, Monika Vyas, Daniel Jacoby, Brian West
A 26year old east African professional athlete presented to the obstetric clinic for a routine visit at 36 weeks gestation. She had a history of Right Ventricular Outflow Tract - Ventricular Tachycardia (RVOT-VT) with an episode of cardiac arrest in the past, and had been treated with ablation 4 years earlier. Her current visit was uneventful, her pregnancy progressing normally. Following the visit she went to a local restaurant where she suffered a cardiac arrest that was unresponsive to therapy. Chest compressions were continued from the time of her collapse until an emergency caesarian section was performed, delivering a healthy female infant...
October 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28840101/radiofrequency-ablation-of-ventricular-tachycardia-originating-from-a-lipomatous-hamartoma-localized-in-the-right-ventricle-cavity
#18
Jin Xu, Yingmin Chen, Xiaoying Ying, Ben He
No abstract text is available yet for this article.
August 2017: HeartRhythm Case Reports
https://www.readbyqxmd.com/read/28838549/arrhythmias-involving-the-atrioventricular-junction
#19
REVIEW
Luigi Di Biase, Carola Gianni, Giuseppe Bagliani, Luigi Padeletti
The atrioventricular junction has a central role in electrophysiology, responsible for reentrant and automatic forms of supraventricular tachycardia. During atrioventricular nodal reentry tachycardia, the circuit involves 2 electrophysiologically separate pathways located in the vicinity of the atrioventricular node. Atrioventricular reentry tachycardia is caused by the presence of an accessory pathway located almost anywhere along the atrioventricular groove; the macroreentrant circuit involves the atrioventricular node, the accessory pathway and necessarily portions of atria and ventricles...
September 2017: Cardiac Electrophysiology Clinics
https://www.readbyqxmd.com/read/28821295/coexistence-of-congenital-left-ventricular-aneurysm-and-prominent-left-ventricular-trabeculation-in-a-patient-with-ldb3-mutation-a-case-report
#20
Shengshuai Shan, Xiaoxiao He, Lin He, Min Wang, Chengyun Liu
BACKGROUND: The coexistence of congenital left ventricular aneurysm and abnormal cardiac trabeculation with gene mutation has not been reported previously. Here, we report a case of coexisting congenital left ventricular aneurysm and prominent left ventricular trabeculation in a patient with LIM domain binding 3 gene mutation. CASE PRESENTATION: A 30-year-old Asian man showed paroxysmal sinus tachycardia and Q waves in an electrocardiogram health check. There were no specific findings in physical examinations and serological tests...
August 19, 2017: Journal of Medical Case Reports
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