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VT ablation

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https://www.readbyqxmd.com/read/29333794/ablation-induced-change-in-the-course-of-fascicular-tachycardia
#1
Avishag Laish-Farkash, Avi Sabbag, Michael Glikson, Aharon Glick, Vladimir Khalameizer, Amos Katz, Yoav Michowitz
BACKGROUND: Multiform fascicular tachycardia (FT) was recently described as a ventricular tachycardia (VT) that has a reentrant mechanism using multiple fascicular branches and produces alternate fascicular VT forms. Ablating the respective fascicle may cause a change in the reentrant circuit resulting in a change in morphology. Ablation of the septal fascicle is crucial for successful treatment. OBJECTIVES: To describe four cases of FT in which ablation induced a change in QRS morphologies and aggravated clinical course...
January 2018: Israel Medical Association Journal: IMAJ
https://www.readbyqxmd.com/read/29330130/perioperative-electrophysiology-study-in-tetralogy-of-fallot-patients-undergoing-pulmonary-valve-replacement-will-identify-those-at-high-risk-for-subsequent-ventricular-tachycardia
#2
Amneet Sandhu, Emily Ruckdeschel, William H Sauer, Kathryn K Collins, Joseph Kay, Amber Khanna, James Jaggers, David Campbell, Max Mitchell, Duy T Nguyen
BACKGROUND: Ventricular tachyarrhythmias (VAs) are the most common cause of death in patients with repaired Tetralogy of Fallot (TOF), but predicting those at risk remains a challenge. Electrophysiological study (EPS) has been proposed to risk stratify TOF patients. OBJECTIVE: We sought to evaluate a perioperative EPS-guided approach to risk stratify TOF patients undergoing PVR and guide concomitant cryoablation. METHODS: A prospective cohort study of TOF patients undergoing EPS at time of PVR from 2006-present was conducted at 2 centers...
January 9, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29326839/can-we-select-patients-for-prophylactic-vt-ablation
#3
(no author information available yet)
No abstract text is available yet for this article.
December 2017: Arrhythmia & Electrophysiology Review
https://www.readbyqxmd.com/read/29325974/fast-nonclinical-ventricular-tachycardia-inducible-after-ablation-in-patients-with-structural-heart-disease-definition-and-clinical-implications
#4
Masaya Watanabe, Marta de Riva, Sebastiaan R D Piers, Olaf M Dekkers, Micaela Ebert, Jeroen Venlet, Serge A Trines, Martin J Schalij, Daniël A Pijnappels, Katja Zeppenfeld
BACKGROUND: Noninducibility of ventricular tachycardia (VT) with an equal or longer cycle length (CL) than the clinical VT is considered the minimum ablation endpoint in patients with structural heart disease (SHD). Since their clinical relevance remains unclear, fast nonclinical VTs are often not targeted. However, an accepted definition for fast VT is lacking. The shortest possible CL of a monomorphic reentrant VT is determined by the ventricular refractory period (VRP). OBJECTIVES: We propose a patient-specific definition for fast VT based on the individual VRP (fVTVRP) and assess the prognostic significance of persistent inducibility after ablation of fVTVRP for VT recurrence...
January 8, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29317972/high-density-mapping-in-ventricular-tachycardia-ablation-a-pentaray%C3%A2-study
#5
Petra Maagh, Arnd Christoph, Henning Dopp, Markus Sebastian Mueller, Gunnar Plehn, Axel Meissner
Background: High-density mapping of ventricular tachycardia (VT) with PentaRay® (Biosense-Webster) provides high resolution with discrimination of local abnormal electrograms and slow conducting channels. We evaluate the feasibility of PentaRay® to characterize the anatomical substrate and assume an influence of the outcome despite limitations. Methods: Over a 24-month period, 26 endocardial and four epicardial maps were obtained of 26 VT patients (18 ischemic cardiomyopathy (ICM, 69...
December 2017: Cardiology Research
https://www.readbyqxmd.com/read/29315941/thromboembolic-prophylaxis-protocol-with-warfarin-after-radiofrequency-catheter-ablation-of-infarct-related-ventricular-tachycardia
#6
Konstantinos C Siontis, Sina Jamé, Ghaith Sharaf Dabbagh, Rakesh Latchamsetty, Krit Jongnarangsin, Fred Morady, Frank M Bogun
INTRODUCTION: Ablation in the left ventricle (LV) is associated with a risk of thromboembolism. There are limited data on the use of specific thromboembolic prophylaxis strategies post-ablation. We aimed to evaluate a thromboembolic prophylaxis protocol after ventricular tachycardia (VT) ablation. METHODS AND RESULTS: The index procedures of 217 patients undergoing ablation for infarct-related VT with open irrigated-tip catheters were included. Patients with large LV endocardial ablation area (> 3 cm between ablation lesions) were started on low-dose, slowly escalating unfractionated heparin (UFH) infusion 8 hours after access hemostasis, followed by 3 months of anticoagulation...
January 9, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29305400/effect-of-baseline-antiarrhythmic-drug-on-outcomes-with-ablation-in-ischemic-ventricular-tachycardia-a-vanish-substudy-ventricular-tachycardia-ablation-versus-escalated-antiarrhythmic-drug-therapy-in-ischemic-heart-disease
#7
Ratika Parkash, Isabelle Nault, Lena Rivard, Lorne Gula, Vidal Essebag, Pablo Nery, Stanley Tung, Jean-Marc Raymond, Laurence Sterns, Steve Doucette, George Wells, Anthony S L Tang, William G Stevenson, John L Sapp
BACKGROUND: The VANISH trial (Ventricular Tachycardia Ablation Versus Escalated Antiarrhythmic Drug Therapy in Ischemic Heart Disease) compared the effectiveness of escalated antiarrhythmic drug therapy to catheter ablation in patients with prior myocardial infarction, an implanted defibrillator, and ventricular tachycardia (VT). The effectiveness of these interventions in patients on sotalol versus amiodarone was compared. METHODS AND RESULTS: Analysis was conducted based on whether patients had recurrent VT, despite amiodarone (amio-refractory) or nonamiodarone drugs (sotalol-refractory)...
January 2018: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29287718/noninvasive-clues-for-diagnosing-ventricular-tachycardia-mechanism
#8
REVIEW
Andres Enriquez, Michael Riley, Francis Marchlinski
The electrophysiologic mechanisms responsible for the initiation and maintenance of ventricular tachycardia (VT) include enhanced automaticity, triggered activity and reentry. Differentiating between these three mechanisms can be challenging for the clinician and usually requires an invasive electrophysiology study. Establishing the underlying VT mechanism in a particular patient is helpful to define the optimal therapeutic approach, including the selection of pharmacologic agents or delineation of an ablation strategy...
November 21, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29246830/relative-timing-of-near-field-and-far-field-electrograms-can-determine-tachyarrhythmia-site-of-origin
#9
Jane Caldwell, Lorne Gula, Fariha Sadiq Ali, Rodrigo I Miranda, Hoshiar Abdollah, Adrian Baranchuk, Kevin Michael, Christopher Simpson, Damian P Redfearn
BACKGROUND: Despite improving algorithms, inappropriate shocks for supraventricular arrhythmias (SVT) still occur in a significant number of patients with implantable cardioverter defibrillators (ICD). This makes the discovery of novel discriminators that use existing ICD hardware, an attractive proposition. OBJECTIVE: We hypothesised that the delay of activation onset from the device detected, far field electrogram(EGM) to the near field, bipole EGM would allow differentiation of ventricular tachycardias (VT) from SVTs...
December 12, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29237608/significance-of-inducible-nonsustained-ventricular-tachycardias-after-catheter-ablation-for-ventricular-tachycardia-in-ischemic-cardiomyopathy
#10
Akira Fujii, Koichi Nagashima, Saurabh Kumar, Shinichi Tanigawa, Samuel H Baldinger, Gregory F Michaud, Roy M John, Bruce A Koplan, Michifumi Tokuda, Keiichi Inada, Usha B Tedrow, William G Stevenson
BACKGROUND: Noninducibility of sustained monomorphic ventricular tachycardia (SMVT) postablation does not insure absence of later recurrence in patients with ischemic cardiomyopathy. This study aims to determine the relation between inducible nonsustained VT postablation and VT recurrences. METHODS AND RESULTS: One hundred sixty-five consecutive patients (156 male; age 68±9 years) underwent ablation for SMVT because of ischemic cardiomyopathy; 44 patients who did not have induction testing or in whom only ventricular fibrillation was induced after ablation were excluded...
December 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29226995/change-in-qrs-morphology-as-a-marker-of-spontaneous-elimination-in-verapamil-sensitive-idiopathic-left-ventricular-tachycardia
#11
Hiroshi Kawakami, Takeshi Aiba, Kohei Ishibashi, Ikutaro Nakajima, Mitsuru Wada, Tsukasa Kamakura, Yuko Inoue, Koji Miyamoto, Hideo Okamura, Satoshi Nagase, Takashi Noda, Yoshihiro Kokubo, Yoshihiro Miyamoto, Satoshi Yasuda, Shiro Kamakura, Kengo Kusano
BACKGROUND: Verapamil-sensitive idiopathic left ventricular tachycardia (verapamil-ILVT) is thought to be due to a reentry within the LV fascicular system. Radiofrequency catheter ablation (RFCA) is effective for elimination of the VT; however, a long-term prognosis of patients with verapamil-ILVT is still unclear. METHODS AND RESULTS: Eighty consecutive verapamil-ILVT patients (62 men, 31±12 years-of-age, LVEF: 65±4%) were enrolled. Seventy-six (95%) cases of VT involved right bundle brunch block and left axis deviation...
December 11, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29216988/catheter-ablation-of-ventricular-tachycardia-in-structural-heart-disease-indications-strategies-and-outcomes-part-ii
#12
REVIEW
Srinivas R Dukkipati, Jacob S Koruth, Subbarao Choudry, Marc A Miller, William Whang, Vivek Y Reddy
In contrast to ventricular tachycardia (VT) that occurs in the setting of a structurally normal heart, VT that occurs in patients with structural heart disease carries an elevated risk for sudden cardiac death (SCD), and implantable cardioverter-defibrillators (ICDs) are the mainstay of therapy. In these individuals, catheter ablation may be used as adjunctive therapy to treat or prevent repetitive ICD therapies when antiarrhythmic drugs are ineffective or not desired. However, certain patients with frequent premature ventricular contractions (PVCs) or VT and tachycardiomyopathy should be considered for ablation before ICD implantation because left ventricular function may improve, consequently decreasing the risk of SCD and obviating the need for an ICD...
December 12, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29216987/catheter-ablation-of-ventricular-tachycardia-in-structurally-normal-hearts-indications-strategies-and-outcomes-part-i
#13
REVIEW
Srinivas R Dukkipati, Subbarao Choudry, Jacob S Koruth, Marc A Miller, William Whang, Vivek Y Reddy
Catheter ablation of ventricular tachycardia (VT) is being increasingly performed; yet, there is often confusion regarding indications, outcomes, and how to identify those patient populations most likely to benefit. The management strategy differs between those with structural heart disease and those without. For the former, an implantable cardioverter-defibrillator (ICD) is typically required due to an elevated risk for sudden cardiac death, and catheter ablation can be used as adjunctive therapy to treat or prevent repetitive ICD therapies...
December 12, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29205672/repetitive-incessant-electrical-storm-triggered-by-early-repolarization
#14
Sofia Chatzidou, Evangelos Repasos, Sotiris Plastiras, Christos Kontogiannis, Marinos Kosmopoulos, Diamantis I Tsilimigras, Ioannis Paraskevaidis, Stelios Rokas
Early repolarization syndrome (ERS) was originally considered a normal variant with benign outcome. However, recent studies have demonstrated that it can be linked to a considerable risk of life-threatening arrhythmias and sudden cardiac death. We report a case with an extraordinary, extremely malignant clinical expression of ERS refractory to all antiarrhythmic drugs including quinidine. This case demonstrates real-time changes of dynamic electrocardiogram (ECG) preceding a polymorphic ventricular tachycardia (VT)-ventricular fibrillation (VF) and possible external factors triggering arrhythmia onset...
December 5, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/29188428/surgical-treatment-for-endocardial-radiofrequency-ablation-resistant-sustained-monomorphic-ventricular-tachycardia-with-mural-thrombus-including-dense-calcification-in-the-left-ventricle
#15
Takuya Higuchi, Yasushi Tsutsumi, Osamu Monta, Satoshi Asada, Ryota Matsumoto, Shouhei Yamada, Hirokazu Ohashi
Catheter ablation provides effective results for sustained monomorphic ventricular tachycardia (VT), but the presence of mural thrombus including dense calcification occasionally causes unfavorable outcomes. The case of a 67-year-old man in whom sustained monomorphic VT, which was resistant to endocardial radiofrequency ablation, in the presence of mural thrombus including dense calcification after coronary artery bypass grafting was successfully treated by left ventricular reconstruction with cryoablation is reported...
November 29, 2017: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29186419/management-of-ventricular-tachycardia-in-the-ablation-era-results-of-the-european-heart-rhythm-association-survey
#16
Roland Richard Tilz, Radoslaw Lenarczyk, Daniel Scherr, Kristina Herman Haugaa, Konstantinos Iliodromitis, Helmut Pürerfellner, Marek Kiliszek, Nikolaos Dagres
Patients with sustained ventricular tachycardia (VT) are at risk of sudden death. Treatment options for VT include antiarrhythmic drug therapy, insertion of an implantable cardioverter-defibrillator, and catheter ablation. Evidence on indications for VT ablation, timing, ablation strategies, and periprocedural management is sparse. The aim of this European Heart Rhythm Association (EHRA) survey was to evaluate clinical practice regarding management of VT among the European countries. An electronic questionnaire was sent to members of the EHRA Electrophysiology Research Network...
November 23, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29173673/ventricular-arrhythmias
#17
REVIEW
William F Dresen, John D Ferguson
Ventricular tachycardia (VT) is the most common form of wide complex tachycardia and is associated with a high mortality rate. Electrocardiographic analysis remains paramount in diagnosis and helps to direct therapy. Antiarrhythmic agents, although effective in reducing arrhythmia burden, have never demonstrated a mortality benefit. The implantable cardioverter-defibrillator aids not only in the acute termination of ventricular arrhythmia, but provides a wealth of information for the long-term management of patients with VT...
February 2018: Cardiology Clinics
https://www.readbyqxmd.com/read/29167624/unique-ventricular-tachycardia-originating-from-the-right-bundle-branch
#18
Hongliang Yang, Daoyuan Si, Yaliang Tong, Zhe An, Ping Yang, Yuquan He
Ventricular tachycardia (VT), a common arrhythmia, frequently originates from in the right ventricular outflow tract, left ventricular outflow tract, aortic sinus, and left ventricular papillary muscle but infrequently from the His-Purkinje system, whereas the VT stemming from the right bundle branch has rarely been reported. Here we reported a case with of VT originating from the right bundle branch which was subsequently successfully treated with radiofrequency ablation and demonstrated the electrocardiac features of VT using an electrophysiological examination...
November 2017: Acta Cardiologica Sinica
https://www.readbyqxmd.com/read/29138142/catheter-ablation-of-idiopathic-left-posterior-fascicular-ventricular-tachycardia-predicting-the-site-of-origin-via-mapping-and-electrocardiography
#19
Wei Ma, Fengmin Lu, Michael Shehata, Xunzhang Wang, Fan Zhang, Bingwei Chen, Dongyan Wu, Le He, Shan Sun, Aijuan Cheng, Jun Ding, Hongliang Cong, Jing Xu
BACKGROUND: We report the 12-lead ECG morphology of left posterior fascicular ventricular tachycardia (LPF-VT) and the relationship between His-ventricular (HV) interval and site of origin in LPF-VT. METHODS AND RESULTS: We studied 41 patients who underwent successful catheter ablation of LPF-VT with HV interval >0 ms (n=8; proximal-LPF group), HV interval 0 to -15 ms (n=15; middle-LPF group), and HV interval <-15 ms (n=18; distal-LPF group). The earliest mapped presystolic potential (PP)-QRS interval was 34...
November 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29132931/hybrid-surgical-versus-percutaneous-access-epicardial-ventricular-tachycardia-ablation
#20
Anthony Li, Justin Hayase, Duc Do, Eric Buch, Marmar Vaseghi, Olujimi A Ajijola, Carlos Macias, Yuliya Krokhaleva, Houman Khakpour, Noel G Boyle, Peyman Benharash, Reshma Biniwale, Kalyanam Shivkumar, Jason S Bradfield
BACKGROUND: There is limited experience of surgical epicardial access in the contemporary era of ventricular tachycardia ablation after prior cardiac surgery. OBJECTIVE: To describe our institutional experience with surgical epicardial access, the influence of surgical approach and compare outcomes to a propensity-matched percutaneous epicardial access control group. METHODS: A retrospective study of consecutive surgical epicardial VT ablation cases from a single center was performed...
November 10, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
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