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Dynamic Left Ventricular Outflow Tract Obstruction Post-Transcatheter Aortic Valve Replacement. JACC Case Rep 2021; 3:871-874. [PMID: 34317644 PMCID: PMC8311343 DOI: 10.1016/j.jaccas.2021.04.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 04/01/2021] [Accepted: 04/27/2021] [Indexed: 11/23/2022]
Abstract
We describe the first case of successful management of left ventricular outflow tract obstruction developing late after transcatheter aortic valve replacement with right ventricular apical pacing. The possible mechanisms of obstruction resolution are described. (Level of Difficulty: Advanced.).
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Tolosana JM, Trucco E. Cardiac pacing in patients with hypertrophic obstructive cardiomyopathy. Glob Cardiol Sci Pract 2018; 2018:29. [PMID: 30393641 PMCID: PMC6209435 DOI: 10.21542/gcsp.2018.29] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Affiliation(s)
- José Maria Tolosana
- Arrhythmias Section, Cardiology, Cardiovascular Institute, Hospital Clinic University, Barcelona, Spain
| | - Emilce Trucco
- Arrhythmias Section, Cardiology, Hospital Universitari Doctor Josep Trueta, Girona, Spain
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Rationale and design of the TRICHAMPION trial: Triple Chamber Pacing in Hypertrophic Obstructive Cardiomyopathy Patients. J Interv Card Electrophysiol 2018; 51:117-124. [PMID: 29397524 DOI: 10.1007/s10840-017-0306-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 12/14/2017] [Indexed: 10/18/2022]
Abstract
PURPOSE Dual-chamber (DDD) pacing has been used for treatment of patients with hypertrophic obstructive cardiomyopathy (HOCM). Due to inconclusive results in prior trials, current guidelines assign DDD pacing a class IIb indication in selected patients. Prior observations indicate that lack of clinical improvement may result from suboptimal effect of DDD pacing with non-physiological AV intervals due to fusion of intrinsic and paced QRS complex. METHODS The Triple Chamber Pacing in Hypertrophic Obstructive Cardiomyopathy Patients (TRICHAMPION) trial is a prospective, randomized, single-blinded, multicenter study to investigate the benefit of atrial synchronous biventricular pacing (CRT-P) in highly symptomatic HOCM patients with severe left ventricular outflow tract (LVOT) obstruction who are not candidates for ablative therapies. AV node ablation is used as key tool to optimize AV intervals in patients with QRS fusion. The primary endpoint is the percentage of patients with symptomatic improvement at 12 months, defined as improvement of New York Heart Association functional class, in the Minnesota Living with Heart Failure Questionnaire score and increased cardiopulmonary exercise endurance. CONCLUSIONS The aim of the TRICHAMPION trial is to investigate the benefit of optimized atrial synchronous biventricular pacing in absence of QRS fusion in highly symptomatic HOCM patients with severe LVOT obstruction who are not candidates for ablative therapies.
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Dyssynchronization reduces dynamic obstruction without affecting systolic function in patients with hypertrophic obstructive cardiomyopathy: a pilot study. Int J Cardiovasc Imaging 2016; 32:1179-88. [PMID: 27146905 DOI: 10.1007/s10554-016-0903-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 04/25/2016] [Indexed: 10/21/2022]
Abstract
Dyssynchrony from biventricular pacing (BiV) can reduce dynamic obstruction in hypertrophic obstructive cardiomyopathy (HOCM), but its consequences on the left ventricular (LV) systolic function are unknown. We evaluate changes in LV systolic function and assess the effectiveness of BiV in HOCM. Thirteen patients with HOCM (55 [33/75] years, five males) received a BiV device and underwent 2D transthoracic echocardiography before the implantation and at 12 months follow-up. Global longitudinal and radial strain, and the timing of segmental displacement curves were measured by commercial speckle-tracking software to assess LV systolic function and dyssynchrony. Peak gradient in the LV outflow tract (LVOT) significantly decreased from 80 [51/100] to 30 [5/66] mmHg (p = 0.005). LV global strain was preserved from baseline to follow-up: 35.1 [20.2/43.8] % vs. 32.6 [27.1/44.1] %, p = NS (radial), and -16.6 [-19.1/-14.4] % vs. -15.7 [-17.0/-14.2] %, p = NS (longitudinal). Dyssynchrony analysis using displacement curves showed inversion of wall motion timing with earlier displacement of the lateral wall at follow-up only in patients with reduction in LVOT gradient. BiV reduces LVOT obstruction in patients with HOCM when dyssynchronization of LV motion and inversion of the timing of LV wall activation are reached. Notably, this does not lead to further deterioration of LV systolic function at mid-term follow-up.
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Houston BA, Stevens GR. Hypertrophic cardiomyopathy: a review. CLINICAL MEDICINE INSIGHTS-CARDIOLOGY 2015; 8:53-65. [PMID: 25657602 PMCID: PMC4309724 DOI: 10.4137/cmc.s15717] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2014] [Revised: 11/19/2014] [Accepted: 11/20/2014] [Indexed: 01/19/2023]
Abstract
Hypertrophic cardiomyopathy (HCM) is a global disease with cases reported in all continents, affecting people of both genders and of various racial and ethnic origins. Widely accepted as a monogenic disease caused by a mutation in 1 of 13 or more sarcomeric genes, HCM can present catastrophically with sudden cardiac death (SCD) or ventricular arrhythmias or insidiously with symptoms of heart failure. Given the velocity of progress in both the fields of heart failure and HCM, we present a review of the approach to patients with HCM, with particular attention to those with HCM and the clinical syndrome of heart failure.
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Affiliation(s)
- Brian A Houston
- Division of Cardiology, Department of Medicine, Johns Hopkins Hospital, Baltimore, MD, USA
| | - Gerin R Stevens
- Division of Cardiology, Department of Medicine, Johns Hopkins Hospital, Baltimore, MD, USA
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Masarone D, Limongelli G, Ammendola E, Del Giorno G, Colimodio F, D’Andrea A, Pacileo G, Santangelo L, Lambiase PD. Cardiac resynchronization therapy in cardiomyopathies. J Cardiovasc Med (Hagerstown) 2014; 15:92-9. [DOI: 10.2459/jcm.0b013e3283637ff2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Nakayama A, Takahashi M, Hina K, Fujiu K, Sugiyama H, Kojima T, Ando J, Imai Y, Hirata Y, Nagai R. Radiofrequency catheter ablation of the accessory pathway adversely affected the left ventricular outflow tract pressure gradient in a patient with hypertrophic obstructive cardiomyopathy. Int Heart J 2013; 54:111-4. [PMID: 23676372 DOI: 10.1536/ihj.54.111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Although hypertrophic cardiomyopathy (HCM) with an accessory pathway is encountered in clinical practice, there is little evidence of a coherent strategy for ablation of the accessory pathway in patients with HCM. We present the case of a 61-year-old man who had type B Wolff-Parkinson-White (WPW) syndrome with hypertrophic obstructive cardiomyopathy (HOCM). Due to paroxysmal atrial fibrillation, he underwent radiofrequency catheter ablation of the accessory pathway located in the right postero-lateral wall to prevent secondary symptomatic events. His LV dyssynchrony improved after the procedure, but the degree of the LV outflow tract (LVOT) pressure gradient was increased. To stabilize the LVOT pressure gradient, he needed additional medications. This case shows that patients with HOCM should be carefully evaluated before making a decision concerning ablation of the accessory pathway.
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Affiliation(s)
- Atsuko Nakayama
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo, Tokyo, Japan
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Vatasescu R, Evertz R, Mont L, Sitges M, Brugada J, Berruezo A. Biventricular / left ventricular pacing in hypertrophic obstructive cardiomyopathy: an overview. Indian Pacing Electrophysiol J 2012; 12:114-23. [PMID: 22665960 PMCID: PMC3356591 DOI: 10.1016/s0972-6292(16)30503-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Hypertrophic cardiomyopathy (HCM) is an autosomal dominant inherited genetic disease characterized by compensatory pathological left ventricle (LV) hypertrophy due to sarcomere dysfunction. In an important proportion of patients with HCM, the site and extent of cardiac hypertrophy results in severe obstruction to LV outflow tract (LVOT), contributing to disabling symptoms and increasing the risk of sudden cardiac death (SCD). In patients with progressive and/or refractory symptoms despite optimal pharmacological treatment, invasive therapies that diminish or abolish LVOT obstruction relieve heart failure-related symptoms, improve quality of life and could be associated with long-term survival similar to that observed in the general population. The gold standard in this respect is surgical septal myectomy, which might be supplementary associated with a reduction in SCD. Percutaneous techniques, particularly alcohol septal ablation (ASA) and more recently radiofrequency (RF) septal ablation, can achieve LVOT gradient reduction and symptomatic benefit in a large proportion of HOCM patients at the cost of a supposedly limited septal myocardial necrosis and a 10-20% risk of chronic atrioventricular block. After an initial period of enthusiasm, standard DDD pacing failed to show in randomized trials significant LVOT gradient reductions and objective improvement in exercise capacity. However, case reports and recent small pilot studies suggested that atrial synchronous LV or biventricular (biV) pacing significantly reduce LVOT obstruction and improve symptoms (acutely as well as long-term) in a large proportion of severely symptomatic HOCM patients not suitable to other gradient reduction therapies. Moreover, biV/LV pacing in HOCM seems to be associated with significant LV reverse remodelling.
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Affiliation(s)
- Radu Vatasescu
- Cardiology Department, Clinic Emergency Hospital, Bucharest, Romania
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LENARCZYK RADOSŁAW, WOŹNIAK ALEKSANDRA, KOWALSKI OSKAR, SOKAL ADAM, PRUSZKOWSKA-SKRZEP PATRYCJA, SREDNIAWA BEATA, SZULIK MARIOLA, ZIELIŃSKA TERESA, KUKULSKI TOMASZ, STABRYŁA JOANNA, MAZUREK MICHAŁ, BIAŁKOWSKI JACEK, KALARUS ZBIGNIEW. Effect of Cardiac Resynchronization on Gradient Reduction in Patients with Obstructive Hypertrophic Cardiomyopathy: Preliminary Study. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2011; 34:1544-52. [DOI: 10.1111/j.1540-8159.2011.03193.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Berruezo A, Vatasescu R, Mont L, Sitges M, Perez D, Papiashvilli G, Vidal B, Francino A, Fernández-Armenta J, Silva E, Bijnens B, González-Juanatey JR, Brugada J. Biventricular pacing in hypertrophic obstructive cardiomyopathy: A pilot study. Heart Rhythm 2011; 8:221-7. [DOI: 10.1016/j.hrthm.2010.10.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Accepted: 10/07/2010] [Indexed: 10/18/2022]
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Left ventricular endocardial pacing predicts the reduction of left ventricular outflow tract pressure gradient immediately after percutaneous transseptal myocardial ablation in patients with hypertrophic obstructive cardiomyopathy refractory to medication. Chin Med J (Engl) 2007. [DOI: 10.1097/00029330-200704010-00007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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Ashrafian H, Mason MJ, Mitchell AG. Regression of dilated-hypokinetic hypertrophic cardiomyopathy by biventricular cardiac pacing. ACTA ACUST UNITED AC 2007; 9:50-4. [PMID: 17224423 DOI: 10.1093/europace/eul137] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The evolution of hypertrophic cardiomyopathy (HCM) towards dilatation and hypokinesis is an increasingly recognized complication with a high incidence of adverse outcomes, including sudden cardiac death, requiring defibrillator implantation and cardiac transplantation. It is generally regarded as the irreversible 'burnt-out' end-stage manifestation of HCM. We report one of the first cases of profound regression of the dilated-hypokinetic state by the application of biventricular pacing and cardiac resynchronization therapy (CRT). Reviewing the literature on the role of pacing in HCM and the energetic rationale for CRT in HCM prompts us to suggest that further systematic studies are needed urgently to assess the role of CRT in HCM variants.
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Affiliation(s)
- Houman Ashrafian
- Department of Cardiology, The Royal Brompton and Harefield NHS Trust, Harefield Hospital, Middlesex UB9 6JH, UK.
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Abstract
Adults with congenital heart disease constitute one of the fastest growing populations in cardiology. Pacing is an integral part of their therapy and may reduce their morbidity and mortality significantly. The current generation of pacemakers is more sophisticated and complex, and they are being utilized for indications other than conduction abnormalities, such as termination of tachycardia and improvement of heart failure. The complex anatomy and history of multiple previous surgeries in adults with congenital heart disease, however, pose many limitations and technical challenges related to the placement of a pacemaker. Unique and innovative approaches to endocardial lead placement and improved epicardial leads is making pacemaker implantation more feasible in these patients.
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Affiliation(s)
- Anjan S Batra
- Department of Pediatric Cardiology, University of California, Irvine, Children's Hospital of Orange County, Orange, CA 92868, USA.
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