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Smits KC, Speekenbrink RGH, Hekman EEG, Koenrades MA, Heeringa TJP, Arens J, Halfwerk FR. Three-Dimensional Heart Modeling of Hypertrophic Obstructive Cardiomyopathy for In Situ Patient-Specific Simulation to Optimize Septal Myectomy. INNOVATIONS-TECHNOLOGY AND TECHNIQUES IN CARDIOTHORACIC AND VASCULAR SURGERY 2024:15569845241273538. [PMID: 39219341 DOI: 10.1177/15569845241273538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
OBJECTIVE Hypertrophic obstructive cardiomyopathy (HOCM) develops in at least 1 out of 715 young adults. Patients who are refractory to medical therapy qualify for septal myectomy. Due to anatomy, serious complications such as ventricular septal defect and heart block may occur. Establishing cardiovascular magnetic resonance (CMR)-based 3-dimensional (3D) models as part of preoperative planning and training has the potential to decrease procedure-related complications and improve results. METHODS CMR images were used to segment cardiac structures. Left ventricular wall thickness was calculated and projected on top of the in silico model. A 3D model was printed with a red layer indicating a wall thickness exceeding 15 mm and used for preoperative resection planning and patient counseling. To provide preoperative patient-specific in situ simulation, the planned resection volume was replaced with silicone in a second model. For perioperative quality control, resected silicone was compared with resected myocardial tissue. The impact of the models was evaluated descriptively through consultation of both the cardiothoracic surgeon and patients and through patient outcomes. RESULTS Three-dimensional in silico and 3D-printed heart models of 5 patients were established preoperatively. Since the introduction of the models in October 2020, the surgeon feels better prepared, more confident, and less difficulty with making decisions. In addition, patients feel better informed preoperatively. CONCLUSIONS Using 3D heart models optimized preoperative planning and training, intraoperative quality control, and patient consultation. Reduction of procedure-related complications and clinical outcome should be studied in larger cohorts.
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Affiliation(s)
- Karin C Smits
- Department of Cardiothoracic Surgery, Thorax Centrum Twente, Medisch Spectrum Twente, Enschede, The Netherlands
- Department of Biomechanical Engineering, Faculty of Engineering Technology, TechMed Centre, University of Twente, Enschede, The Netherlands
- Department of Physiology and Cardiology, Maastricht University Medical Centre, The Netherlands
| | - Ron G H Speekenbrink
- Department of Cardiothoracic Surgery, Thorax Centrum Twente, Medisch Spectrum Twente, Enschede, The Netherlands
| | - Edsko E G Hekman
- Department of Biomechanical Engineering, Faculty of Engineering Technology, TechMed Centre, University of Twente, Enschede, The Netherlands
| | - Maaike A Koenrades
- Medical 3D Lab, Medisch Spectrum Twente, Enschede, The Netherlands
- Multi-Modality Medical Imaging (M3i) Group, Faculty of Science and Technology, TechMed Centre, University of Twente, Enschede, The Netherlands
| | - Tijn J P Heeringa
- Department of Cardiothoracic Surgery, University Medical Centre Utrecht, The Netherlands
| | - Jutta Arens
- Department of Biomechanical Engineering, Faculty of Engineering Technology, TechMed Centre, University of Twente, Enschede, The Netherlands
| | - Frank R Halfwerk
- Department of Cardiothoracic Surgery, Thorax Centrum Twente, Medisch Spectrum Twente, Enschede, The Netherlands
- Department of Biomechanical Engineering, Faculty of Engineering Technology, TechMed Centre, University of Twente, Enschede, The Netherlands
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Sherrod CF, Saberi S, Nassif ME, Claggett BL, Coats CJ, Garcia-Pavia P, Januzzi JL, Lewis GD, Ma C, Maron MS, Miao ZM, Olivotto I, Veselka J, Butzner M, Jacoby DL, Heitner SB, Kupfer S, Malik FI, Meng L, Wohltman A, Spertus JA. Effect of Aficamten on Health Status Outcomes in Obstructive Hypertrophic Cardiomyopathy: Results from SEQUOIA-HCM. J Am Coll Cardiol 2024:S0735-1097(24)08166-X. [PMID: 39217569 DOI: 10.1016/j.jacc.2024.08.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2024] [Revised: 08/07/2024] [Accepted: 08/10/2024] [Indexed: 09/04/2024]
Abstract
BACKGROUND A primary goal in treating obstructive hypertrophic cardiomyopathy (oHCM) is to improve patients' health status: their symptoms, function, and quality of life. The health status benefits of aficamten, a novel cardiac myosin inhibitor, have not been comprehensively described. OBJECTIVES This study sought to determine the effect of aficamten on patient-reported health status, including symptoms of fatigue, shortness of breath, chest pain, physical and social limitations, and quality of life. METHODS SEQUOIA-HCM (Phase 3 Trial to Evaluate the Efficacy and Safety of Aficamten Compared to Placebo in Adults With Symptomatic oHCM) randomized symptomatic adults with oHCM to 24 weeks of aficamten (n = 142) or placebo (n = 140), followed by a 4-week washout. The Kansas City Cardiomyopathy Questionnaire (KCCQ) and Seattle Angina Questionnaire 7-item (SAQ7) were serially administered. Changes in mean KCCQ-Overall Summary Score (KCCQ-OSS) and SAQ7-Summary Score (SAQ7-SS) from baseline to 24 weeks and following treatment withdrawal were compared using linear regression adjusted for baseline scores and randomization strata. Proportions of patients with clinically important changes were compared. RESULTS Among 282 participants, the mean age was 59 ± 13 years, 115 (41%) were female, and 223 (79%) were White. Baseline KCCQ-OSS (69.3 ± 20.1 vs 67.3 ± 18.8) and SAQ7-SS (72.0 ± 21.0 vs 72.4 ± 18.3) were similar between aficamten and placebo groups. Treatment with aficamten, compared with placebo, improved both the mean KCCQ-OSS (13.3 ± 16.3 vs 6.1 ± 12.6; mean difference: 7.9; 95% CI: 4.8-11.0; P < 0.001) and SAQ7-SS (11.6 ± 17.4 vs 3.8 ± 14.4; mean difference: 7.8; 95% CI: 4.7-11.0; P < 0.001) at 24 weeks, with benefits emerging within 4 weeks. No heterogeneity in treatment effect was found across subgroups. A much larger proportion of participants experienced a very large health status improvement (≥20 points) with aficamten vs placebo (KCCQ-OSS: 29.7% vs 12.4%, number needed to treat: 5.8; SAQ7-SS: 31.2% vs 13.9%, number needed to treat: 5.8). Participants' health status worsened significantly more after withdrawal from aficamten than placebo (KCCQ-OSS: -16.2 ± 19.0 vs -3.0 ± 9.6; P < 0.001; SAQ7-SS: -17.4 ± 21.4 vs -2.5 ± 13.3), further confirming a causal effect of aficamten. CONCLUSIONS In patients with symptomatic oHCM, treatment with aficamten resulted in markedly improved health status, including significant improvement in chest pain-related health status, than placebo. (Phase 3 Trial to Evaluate the Efficacy and Safety of Aficamten Compared to Placebo in Adults With Symptomatic oHCM [SEQUOIA-HCM]; NCT05186818).
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Affiliation(s)
- Charles F Sherrod
- University of Missouri-Kansas City's Healthcare Institute for Innovations in Quality, Kansas City, Missouri, USA; Saint Luke's Mid America Heart Institute, Kansas City, Missouri, USA.
| | - Sara Saberi
- Department of Internal Medicine, Division of Cardiovascular Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Michael E Nassif
- University of Missouri-Kansas City's Healthcare Institute for Innovations in Quality, Kansas City, Missouri, USA; Saint Luke's Mid America Heart Institute, Kansas City, Missouri, USA
| | - Brian L Claggett
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Caroline J Coats
- School of Cardiovascular and Metabolic Health, University of Glasgow, Glasgow, United Kingdom
| | - Pablo Garcia-Pavia
- Hospital Universitario Puerta de Hierro Majadahonda, Instituto de Investigación Sanitaria Puerta de Hierro-Segovia de Arana (IDIPHISA), Centro de Investigación Biomédica en Red Enfermedades Cardiovasculares (CIBERCV), Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - James L Januzzi
- Division of Cardiology, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA; Baim Institute for Clinical Research, Boston, Massachusetts, USA
| | - Gregory D Lewis
- Division of Cardiology, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Changsheng Ma
- Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Martin S Maron
- Lahey Hospital and Medical Center, Burlington, Massachusetts, USA
| | - Zi Michael Miao
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Iacopo Olivotto
- Meyer Children's Hospital, Istituto di Ricovero e Cura a Carattere Scientifico, Florence, Italy
| | - Josef Veselka
- Department of Cardiology, Angiology and Intensive Care, Klinikum Chemnitz gGmbH, Medical Campus Chemnitz of the Technische Universität Dresden, Dresden, Germany
| | - Michael Butzner
- Cytokinetics, Incorporated, South San Francisco, California, USA
| | - Daniel L Jacoby
- Cytokinetics, Incorporated, South San Francisco, California, USA
| | | | - Stuart Kupfer
- Cytokinetics, Incorporated, South San Francisco, California, USA
| | - Fady I Malik
- Cytokinetics, Incorporated, South San Francisco, California, USA
| | - Lisa Meng
- Cytokinetics, Incorporated, South San Francisco, California, USA
| | - Amy Wohltman
- Cytokinetics, Incorporated, South San Francisco, California, USA
| | - John A Spertus
- University of Missouri-Kansas City's Healthcare Institute for Innovations in Quality, Kansas City, Missouri, USA; Saint Luke's Mid America Heart Institute, Kansas City, Missouri, USA
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Fortier JH, Thapa Y, Crean AM, Gupta H, Grau JB. Invasive Management of Hypertrophic Cardiomyopathy With Clinically Important Obstruction: Surgical Myectomy Is Superior, but Only When Accessible. Can J Cardiol 2024; 40:843-850. [PMID: 38052300 DOI: 10.1016/j.cjca.2023.11.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 11/16/2023] [Accepted: 11/28/2023] [Indexed: 12/07/2023] Open
Abstract
For patients with hypertrophic cardiomyopathy (HCM), a thickened intraventricular septum and systolic anterior motion of the mitral valve (SAM) can contribute to significant left ventricular outflow tract obstruction (LVOTO), mitral regurgitation, and debilitating symptoms. Current guidelines recommend septal reduction therapy through alcohol septal ablation or surgical septal myectomy for patients whose symptoms persist despite medical therapy. Although alcohol septal ablation is a less invasive treatment option, it is not suitable for patients with septal perforator branch anatomy that is not compatible with the procedure, those with midcavitary obstruction, and patients in whom the mechanism of LVOTO is primarily related to SAM. Septal ablation also has a notably higher rate of atrioventricular block requiring permanent pacemaker insertion, and the need for reintervention has been reported to be 15% or more. In contrast, septal myectomy offers direct visualisation and can address thickened septum and mitral valve (MV) anomalies. It can be used to treat a wider variety of anatomies, with lower rates of reoperation. Aside from the more invasive nature of the procedure, a major limitation of septal myectomy, however, is access, because relatively few surgeons specialise in the procedure. This is important because there is a significant correlation between procedural volumes and outcomes. Patients should be evaluated by a multidisciplinary heart team to ensure that they are aware of all treatment options. In this review, we explore the 2 methods of septal reduction therapy and highlight the need for further training of septal myectomy surgeons to ensure access to optimal septal reduction therapies for Canadian patients with HCM.
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Affiliation(s)
- Jacqueline H Fortier
- Division of Cardiothoracic Surgery, The Valley Hospital, Ridgewood, New Jersey, USA
| | - Yashaswi Thapa
- Department of Neuroscience, Carleton University, Ottawa, Ontario, Canada
| | - Andrew M Crean
- Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada; Division of Cardiology, University of Manchester, Manchester, United Kingdom
| | - Himanshu Gupta
- Division of Cardiac Imaging, Valley Heart and Vascular Institute, Ridgewood, New Jersey, USA
| | - Juan B Grau
- Division of Cardiothoracic Surgery, The Valley Hospital, Ridgewood, New Jersey, USA; Division of Cardiac Surgery, University of Ottawa Heart Institute, Ottawa, Ontario, Canada.
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Scholtz S, Rudolph V, Reil JC. Alcohol Septal Ablation or Mavacamten for Obstructive Hypertrophic Cardiomyopathy. J Clin Med 2023; 12:6628. [PMID: 37892766 PMCID: PMC10607288 DOI: 10.3390/jcm12206628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 09/18/2023] [Accepted: 10/18/2023] [Indexed: 10/29/2023] Open
Abstract
Hypertrophic cardiomyopathy (HCM) is a genetic disease characterized by an increased left ventricular wall thickness in the absence of increased afterload conditions. In addition to diastolic dysfunction, obstruction of the left ventricular outflow tract is common in HCM and has an important influence on symptoms and outcome. Over the last five decades or two decades, respectively, surgical myectomy and alcohol septal ablation were the only therapeutic options if standard medical care was not sufficient. Recently, a new option has become available that has the potential to revolutionize the therapeutic strategies for patients with HCM. Mavacamten is a myosin inhibitor that belongs to a completely new drug class and targets the excessive actin-myosin cross-bridging that is the underlying pathology of HCM. By reducing the actin-myosin interactions, mavacamten not only reduces the left ventricular outflow tract (LVOT) obstruction but also seems to have positive effects on the diastolic function, microcirculation, and cardiac structure. This article summarizes the current evidence on alcohol septal ablation and reviews the preclinical and clinical data on mavacamten for the treatment of patients with obstructive HCM.
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Affiliation(s)
- Smita Scholtz
- Klinik für Allgemeine und Interventionelle Kardiologie/Angiologie, Herz und Diabeteszentrum NRW, Ruhr-Universität Bochum, 32545 Bad Oeynhausen, Germany (J.-C.R.)
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