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https://www.readbyqxmd.com/read/29786883/left-ventricular-aneurysms-in-hypertrophic-cardiomyopathy-with-midventricular-obstruction-a-systematic-review-of-literature
#1
Moustafa O Elsheshtawy, Ahmed N Mahmoud, Mahmoud Abdelghany, Ida H Suen, Adnan Sadiq, Jacob Shani
BACKGROUND: Hypertrophic cardiomyopathy (HCM) with or without left ventricular apical aneurysm (LVA) had been studied in the past. Midventricular obstruction associated with HCM and LVA is a unique entity that has not been distinguished previously as a separate phenotypic disease in HCM patients. METHODS: A systematic review of Pubmed and Google Scholar was conducted from inception until September 2017 for all observational studies conducted on HCM with midventricular obstruction and LVA...
May 22, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29784125/catheter-directed-thrombolysis-for-pulmonary-embolism-the-state-of-practice
#2
Xi Xue, Akhilesh K Sista
Acute pulmonary embolism (PE) is a major public health problem. It is the third most common cause of death in hospitalized patients. In the United States, there are up to 600,000 cases diagnosed per year with 100,000-180,000 acute PE-related deaths. Common risk factors include underlying genetic conditions, acquired conditions, and acquired hypercoagulable states. Acute PE increases the pulmonary vascular resistance and the load on the right ventricle (RV). Increased RV loading causes compensatory RV dilation, impaired contractility, tachycardia, and sympathetic activation...
June 2018: Techniques in Vascular and Interventional Radiology
https://www.readbyqxmd.com/read/29782639/sudden-cardiac-death-in-athletes-and-the-value-of-cardiovascular-magnetic-resonance
#3
REVIEW
Sophie I Mavrogeni, Flora Bacopoulou, Despoina Apostolaki, George P Chrousos
Sudden cardiac death (SCD) is the non-traumatic death, due to loss of heart function that occurs suddenly and unexpectedly within 6 hours of a previously normal state of health. It is related to intense competitive sports promoting ventricular tachycardia (VT)/ventricular fibrillation (VF) in the presence of underlying abnormal substrate. A serial evaluation of cardiac physiologic changes taking place during training will allow the better understanding of athlete's heart and will facilitate its discrimination from other gray-zone cardiomyopathies...
May 21, 2018: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29781518/an-interesting-case-of-wide-qrs-tachycardia-with-right-bundle-branch-block-morphology-what-is-the-mechanism
#4
Krishna Kumar Mohanan Nair, Narayanan Namboodiri, Hiren Kevadiya, Ajitkumar Valaparambil
A 30 year old gentleman with no structural heart disease has been evaluated for paroxysmal palpitation with documented regular wide QRS tachycardia that has not responded to IV adenosine. Surface electrocardiogram has not shown any pre-excitation. He has been taken for an EP study after informed consent. Diagnostic catheters were placed at coronary sinus (CS), His bundle region and right ventricle (RV). During catheter manipulation a regular wide QRS tachycardia with right bundle branch block morphology (RBBB) with a tachycardia cycle length (TCL) of 400 ms and normal QRS axis similar to the clinical tachycardia got induced (Fig:1)...
May 21, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29769222/transient-outward-k-current-i-to-underlies-the-right-ventricular-initiation-of-polymorphic-ventricular-tachycardia-in-a-transgenic-rabbit-model-of-long-qt-syndrome-type-1
#5
Bum-Rak Choi, Weiyan Li, Dmitry Terentyev, Anatoli Y Kabakov, Mingwang Zhong, Colin M Rees, Radmila Terentyeva, Tae Yun Kim, Zhilin Qu, Xuwen Peng, Alain Karma, Gideon Koren
BACKGROUND: Sudden death in long-QT syndrome type 1 (LQT1), an inherited disease caused by loss-of-function mutations in KCNQ1, is triggered by early afterdepolarizations (EADs) that initiate polymorphic ventricular tachycardia (pVT). We investigated ionic mechanisms that underlie pVT in LQT1 using a transgenic rabbit model of LQT1. METHODS: Optical mapping, cellular patch clamping, and computer modeling were used to elucidate the mechanisms of EADs in transgenic LQT1 rabbits...
June 2018: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29757364/ventricular-tachycardia-due-to-isolated-non-compaction-of-the-right-ventricle
#6
T Rambhatla, S Mountantonakis, K Bhasin, N Skipitaris, I Kronzon
No abstract text is available yet for this article.
May 10, 2018: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29747658/naxos-disease-from-the-origin-to-today
#7
REVIEW
Guo-Liang Li, Ardan M Saguner, Guy H Fontaine
Naxos disease, first described by Dr. Nikos Protonotarios and colleagues on the island of Naxos, Greece, is a special form of arrhythmogenic right ventricular dysplasia (ARVD). It is an inherited condition with a recessive form of transmission and a familial penetrance of 90%. It is associated with thickening of the skin of the hands and sole, and a propensity to woolly hair. The cardiac anomalies characterized by ventricular arrhythmias with ventricular extrasystoles and tachycardia and histologic features of the myocardium are consistent with ARVD, but in a more severe form of dysplasia with major dilatation of the right ventricle...
May 10, 2018: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/29736793/a-novel-imaging-finding-in-williams-syndrome-the-coral-sign
#8
Jeremy R Burt, Kimberly Beavers, Melissa Kendall, Michael Valente, Jorge A Garcia
A 16-year-old female, with a history of Williams syndrome, presented to our institution with a 2-week history of intermittent dizziness. Holter monitoring demonstrated occasional premature ventricular contractions with rare couplets and triplets as well as one short run of nonsustained ventricular tachycardia. Echocardiography revealed an abnormal and irregular left ventricular septum with multiple mobile, pedunculated muscular projections extending into the left ventricular cavity. Cardiac MR confirmed abnormally thickened trabeculations consisting of multiple parallel ridges of myocardium crossing the left ventricle...
May 7, 2018: Pediatric Cardiology
https://www.readbyqxmd.com/read/29731502/idiopathic-ventricular-premature-contraction-and-ventricular-tachycardia-distribution-of-the-origin-diagnostic-algorithm-and-catheter-ablation
#9
Yoshinori Kobayashi
Idiopathic ventricular premature contractions (VPCs), defined as VPCs in the absence of obvious structural heart disease, are one of the common types of arrhythmia in clinical practice. They are sometimes complicated with non-sustained ventricular tachycardia (VT), and/or sustained VT with almost same QRS morphology in 12 leads ECG. Idiopathic VT (IVT) commonly occurs by focal mechanisms and the origins are distributed in a variety of sites in both ventricles. In this article, the clinical characteristics of IVT/IVPCs, the diagnostic algorithm, and how to ablate them will be reviewed...
2018: Journal of Nippon Medical School, Nippon Ika Daigaku Zasshi
https://www.readbyqxmd.com/read/29703454/wide-complex-tachycardia-discrimination-using-dynamic-time-warping-of-ecg-beats
#10
F Niknejad Mazandarani, M Mohebbi
BACKGROUND AND OBJECTIVE: Automatic processing and accurate diagnosis of wide complex tachycardia (WCT) arrhythmia groups using electrocardiogram signals (ECG) remains a challenge. WCT arrhythmia consists of two main groups: ventricular tachycardia (VT) and supraventricular tachycardia with aberrancy (SVT-A). These two groups have similar morphologies in the realm of ECG signals. VT and SVT-A arrhythmias originate from the ventricle and atrium, respectively. Hence, inaccurate diagnosis of SVT-A instead of VT can be fatal...
April 20, 2018: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/29678335/arrhythmic-risk-stratification-in-patients-with-idiopathic-dilated-cardiomyopathy
#11
Davide Stolfo, Nicole Ceschia, Massimo Zecchin, Antonio De Luca, Marco Gobbo, Giulia Barbati, Marta Gigli, Marco Masè, Bruno Pinamonti, Alberto Pivetta, Marco Merlo, Gianfranco Sinagra
Arrhythmic risk stratification in idiopathic dilated cardiomyopathy (IDC) remains a major concern. As the ventricles remodel in time, risk factors for arrhythmic death may change. A cohort of 710 patients with idiopathic dilated cardiomyopathy, without previous ventricular arrhythmias, was retrospectively studied to understand how risks vary in time. The primary end point was a composite of sudden cardiac death, ventricular fibrillation, sustained ventricular tachycardia, and appropriate implantable cardioverter-defibrillator interventions...
March 14, 2018: American Journal of Cardiology
https://www.readbyqxmd.com/read/29659078/mechanistic-subtypes-of-focal-right-ventricular-tachycardia
#12
REVIEW
Bruce B Lerman, Jim W Cheung, James E Ip, Christopher F Liu, George Thomas, Steven M Markowitz
Idiopathic sustained focal right ventricular tachycardia (VT) is most frequently due to outflow tract (OT) tachycardia. This arrhythmia is recognized by its characteristic ECG pattern and sensitivity to adenosine. However, there are other forms of idiopathic, focal sustained VT that originate in the right ventricle (RV), which are less well appreciated and easily misdiagnosed. This review will identify the characteristic features and electrophysiologic properties of these forms of RV VT, including those originating from the tricuspid annulus, right ventricular papillary muscles and moderator band as well as variants of classic RVOT tachycardia and those due to microreentry in the presence of preclinical disease...
April 16, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29658871/new-onset-ventricular-arrhythmias-in-patients-with-left-ventricular-dysfunction-after-coronary-surgery-incidence-risk-factors-and-prognosis
#13
Nan Cheng, Changqing Gao, Rong Wang, Ming Yang, Lin Zhang
BACKGROUND: The incidence, risk factors, and long-term prognosis of new-onset ventricular tachycardia (VT) and ventricular fibrillation (VF) after coronary artery bypass graft surgery (CABG) in patients with impaired left ventricular function have not been thoroughly examined. Methods: This study enrolled 612 consecutive patients with impaired left ventricular function (ejection fraction <50%) undergoing CABG at a single institution between March, 1996, and September, 2015. Outcomes were analyzed and compared, including in-hospital mortality and long-term survival...
March 26, 2018: Heart Surgery Forum
https://www.readbyqxmd.com/read/29622977/clinical-and-laboratory-characteristics-of-short-term-mortality-in-egyptian-patients-with-acute-heart-failure
#14
Ahmad Tageldien Abdellah, Alaa Desouky Mohamed, Hamdy Ali Hendawi, Magdi Ali Omera
Objective: To identify the clinical and laboratory predictors of short-term mortality in patients with acute heart failure (AHF). Subjects and methods: We conducted a prospective, single center study on 120 consecutive patients presented with acute heart failure to the emergency department. All patients had clinical, laboratory, electrocardiographic and echocardiographic evaluation. Short-term mortality was reported within 30 days of presentation. Results: Mean age was 59...
September 2017: The Egyptian heart journal: (EHJ): official bulletin of the Egyptian Society of Cardiology
https://www.readbyqxmd.com/read/29602766/predictors-of-acute-failure-ablation-of-intra-atrial-re-entrant-tachycardia-in-patients-with-congenital-heart-disease-cardiac-disease-atypical-flutter-and-previous-atrial-fibrillation
#15
Ivo Roca-Luque, Nuria Rivas-Gándara, Laura Dos-Subirà, Jaume Francisco-Pascual, Antònia Pijuan-Domenech, Jordi Pérez-Rodon, Alba Santos-Ortega, Ferran Roses-Noguer, Ignacio Ferreira-Gonzalez, David García-Dorado García, Angel Moya Mitjans
BACKGROUND: Intra-atrial re-entrant tachycardia (IART) in patients with congenital heart disease (CHD) increases morbidity and mortality. Radiofrequency catheter ablation has evolved as the first-line treatment. The aim of this study was to analyze the acute success and to identify predictors of failed IART radiofrequency catheter ablation in CHD. METHODS AND RESULTS: The observational study included all consecutive patients with CHD who underwent a first ablation procedure for IART at a single center from January 2009 to December 2015 (94 patients, 39...
March 30, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29562427/-initial-experience-of-catheter-ablation-of-ventricular-tachycardia-originate-from-endocardium-via-direct-ventricle-puncture-access-in-patients-underwent-mechanical-valve-implantation
#16
L M Wu, J R Bao, L H Zheng, G Chen, L G Ding, Y Yao
Objective: To evaluate the results of catheter ablation of ventricular tachycardia (VT) via direct ventricle puncture access in patients without traditional approach. Methods: Two idiopathic left fasicular VT patients with mechanical aortic and mitrial valve repalcement and 1 patient with right ventricular originated VT post mechanical tricuspid valve repalcement from March 2010 to July 2012 in Fuwai hospital were enrolled in this study. For left fasicular VT patients, catheter ablation was performed using transapical left ventricular access via minithoracotomy...
March 24, 2018: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/29556684/phosphodiesterase-pde2-activity-increased-by-isoprenaline-does-not-reduce-%C3%AE-adrenoceptor-mediated-chronotropic-and-inotropic-effects-in-rat-heart
#17
Alejandro Galindo-Tovar, María Luisa Vargas, Alberto J Kaumann
Myocardial PDE2 activity increases in terminal human heart failure and after isoprenaline infusion in rat heart. PDE2 inhibitors do not potentiate the murine sinoatrial tachycardia produced by noradrenaline. We investigated whether isoprenaline infusion induces PDE2 to decrease the chronotropic and inotropic effects of catecholamines in rat heart. Sprague-Dawley rats were infused with isoprenaline (2.4 mg kg-1  day-1 ) for 3 days. We used spontaneously beating right atria, paced right ventricular strips and left ventricular papillary muscles...
June 2018: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/29553504/tachycardia-induced-cardiomyopathy-as-a-chronic-heart-failure-model-in-swine
#18
Pavel Hála, Mikuláš Mlček, Petr Ošťádal, David Janák, Michaela Popková, Tomáš Bouček, Stanislav Lacko, Jaroslav Kudlička, Petr Neužil, Otomar Kittnar
A stable and reliable model of chronic heart failure is required for many experiments to understand hemodynamics or to test effects of new treatment methods. Here, we present such a model by tachycardia-induced cardiomyopathy, which can be produced by rapid cardiac pacing in swine. A single pacing lead is introduced transvenously into fully anaesthetized healthy swine, to the apex of the right ventricle, and fixated. Its other end is then tunneled dorsally to the paravertebral region. There, it is connected to an in-house modified heart pacemaker unit that is then implanted in a subcutaneous pocket...
February 17, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29550833/a-case-of-lown-ganong-levine-syndrome-due-to-an-accessory-pathway-of-james-fibers-or-enhanced-atrioventricular-nodal-conduction-eavnc
#19
Juanita Hunter, Emmanouil Tsounias, John Cogan, Ming-Lon Young
BACKGROUND Lown-Ganong-Levine syndrome, includes a short PR interval, normal QRS complex, and paroxysmal tachycardia. The pathophysiology of this syndrome includes an accessory pathway connecting the atria and the atrioventricular (AV) node (James fiber), or between the atria and the His bundle (Brechenmacher fiber). Similar features are seen in enhanced atrioventricular nodal conduction (EAVNC), with the underlying pathophysiology due to a fast pathway to the AV node, and with the diagnosis requiring specific electrophysiologic criteria...
March 18, 2018: American Journal of Case Reports
https://www.readbyqxmd.com/read/29544514/cardiovascular-magnetic-resonance-guided-ablation-and-intra-procedural-visualization-of-evolving-radiofrequency-lesions-in-the-left-ventricle
#20
Philippa R P Krahn, Sheldon M Singh, Venkat Ramanan, Labonny Biswas, Nicolas Yak, Kevan J T Anderson, Jennifer Barry, Mihaela Pop, Graham A Wright
BACKGROUND: Radiofrequency (RF) ablation has become a mainstay of treatment for ventricular tachycardia, yet adequate lesion formation remains challenging. This study aims to comprehensively describe the composition and evolution of acute left ventricular (LV) lesions using native-contrast cardiovascular magnetic resonance (CMR) during CMR-guided ablation procedures. METHODS: RF ablation was performed using an actively-tracked CMR-enabled catheter guided into the LV of 12 healthy swine to create 14 RF ablation lesions...
March 15, 2018: Journal of Cardiovascular Magnetic Resonance
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