1
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Madias JE. Left ventricular outflow tract obstruction/hypertrophic cardiomyopathy/takotsubo syndrome: A new hypothesis of takotsubo syndrome pathophysiology. Curr Probl Cardiol 2024; 49:102668. [PMID: 38797507 DOI: 10.1016/j.cpcardiol.2024.102668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2024] [Accepted: 05/20/2024] [Indexed: 05/29/2024]
Abstract
The pathophysiology of TTS is still elusive. This viewpoint proposes that TTS is an acute coronary syndrome, engendered by an ASNS/catecholamine-induced LVOTO, which results in an enhanced wall stress and afterload-based supply/demand mismatch, culminating in a segmental myocardial ischemic injury state, in susceptible individuals. Such individuals are felt to be particularly women with chronic hypertension, known or latent HCM, or non-HCM segmental myocardial hypertrophy, and certain structural abnormalities involving the LV and the MV apparatus. Recommendations are provided to explore further this hypothesis, while maintaining our focus on all other advanced TTS pathophysiology hypotheses for all patients, or those who do not experience LVOTO, men, the young, and patients with reverse, mid-ventricular, or right ventricular TTS, in whom more prolonged hyperadrenergic stimulation and/or larger amounts of blood-ridden catecholamines, segmental particularities of cardiac innervation and/or density of α-, and β-adrenergic receptors, pheochromocytoma, neurological chronic or acute comorbidities/catastrophies, coronary epicardial/microvascular vasospasm, and CMD.
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Affiliation(s)
- John E Madias
- From the Icahn School of Medicine at Mount Sinai, New York, NY, United States; Division of Cardiology, Elmhurst Hospital Center, Elmhurst, NY, United States.
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2
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Madias JE. Frequent POCUS and auscultation for an earlier diagnosis of takotsubo syndrome and unraveling of its pathophysiology: The possible crucial role of LVOTO. Curr Probl Cardiol 2024; 49:102482. [PMID: 38401826 DOI: 10.1016/j.cpcardiol.2024.102482] [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: 02/21/2024] [Accepted: 02/21/2024] [Indexed: 02/26/2024]
Abstract
There is ample literature associating LVOTO with hypertension, AMI, LV hypertrophy, sigmoid septum, HCM, and TTS, particularly in midde aged/elderly/postmenopausal women, suggestive of a causal role for LVOTO in the pathophysiology of TTS. Although there is significant evidence that TTS is triggered by a sudden autonomic sympathetic nervous system surge and/or elevated blood-ridden catecholamines, the exact pathophysiologic trajectory leading to the clinical expression of the disease is still being debated. This review expounds on the possibility that LVOTO is a causal early component of this trajectory, and proposes that TTS is a malady within the broad spectrum of the myocardial ischemic injury/stunned myocardium states. The postulated underlying mechanism by which LVOTO causes TTS is a sudden abterload rise, with resultant oxygen/energy supply/demand mismatch, leading to a transient myocardial ischemia/injury myocardial stunning state. This needs to be explored painstakingly, and this review includes some suggestions for such undertaking. Ellucidation of the pathophysiology of TTS, and possible proof about a mechanistic role of LVOTO, may ensure that our current pharmacological and device panoply is adequate for the management of TTS.
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Affiliation(s)
- John E Madias
- Icahn School of Medicine at Mount Sinai, New York, NY, United States; Division of Cardiology, Elmhurst Hospital Center, Elmhurst, NY, United States.
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3
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Omerovic E, Citro R, Bossone E, Redfors B, Backs J, Bruns B, Ciccarelli M, Couch LS, Dawson D, Grassi G, Iacoviello M, Parodi G, Schneider B, Templin C, Ghadri JR, Thum T, Chioncel O, Tocchetti CG, Van Der Velden J, Heymans S, Lyon AR. Pathophysiology of Takotsubo Syndrome - a joint scientific statement from the Heart Failure Association Takotsubo Syndrome Study Group and Myocardial Function Working Group of the European Society of Cardiology - Part 1: Overview and the central role for catecholamines and sympathetic nervous system. Eur J Heart Fail 2021; 24:257-273. [PMID: 34907620 DOI: 10.1002/ejhf.2400] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 12/04/2021] [Accepted: 12/07/2021] [Indexed: 11/11/2022] Open
Abstract
This is the first part of a scientific statement from the Heart Failure Association of the European Society of Cardiology focused upon the pathophysiology of Takotsubo syndrome and is complimentary to the previous HFA Position Statement on Takotsubo syndrome which focused upon clinical management. In part 1 we provide an overview of the pathophysiology of Takotsubo syndrome and fundamental questions to consider. We then review and discuss the central role of catecholamines and the sympathetic nervous system in the pathophysiology, and the direct effects of high surges in catecholamines upon myocardial biology including β-adrenergic receptor signaling, G protein coupled receptor kinases, cardiomyocyte calcium physiology, myofilament physiology, cardiomyocyte gene expression, myocardial electrophysiology and arrhythmogenicity, myocardial inflammation, metabolism and energetics. The integrated effects upon ventricular haemodynamics are discussed and integrated into the pathophysiological model. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Elmir Omerovic
- Department of Cardiology, Sahlgrenska University Hospital and Department of Molecular and Clinical Medicine/Wallenberg Laboratory, Institute of Medicine, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden
| | - Rodolfo Citro
- Heart Department, University Hospital "San Giovanni di Dio e Ruggi d'Aragona", Salerno, Italy
| | - Eduardo Bossone
- Division of Cardiology, A. Cardarelli Hospital, Naples, Italy
| | - Bjorn Redfors
- Department of Cardiology, Sahlgrenska University Hospital and Department of Molecular and Clinical Medicine/Wallenberg Laboratory, Institute of Medicine, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden
| | - Johannes Backs
- Institute of Experimental Cardiology, Heidelberg University, Germany.,DZHK (German Centre for Cardiovascular Research), Partner Site Heidelberg/Mannheim, Germany
| | - Bastian Bruns
- Institute of Experimental Cardiology, Heidelberg University, Germany.,DZHK (German Centre for Cardiovascular Research), Partner Site Heidelberg/Mannheim, Germany.,Department of General Internal Medicine and Psychosomatics, University of Heidelberg, Heidelberg, Germany
| | - Michele Ciccarelli
- Department of Medicine, Surgery, and Dentistry, University of Salerno, Salerno, Italy
| | - Liam S Couch
- National Heart and Lung Institute, Imperial College, London, UK
| | - Dana Dawson
- Aberdeen Cardiovascular and Diabetes Centre, School of Medicine and Dentistry, University of Aberdeen, Aberdeen, Scotland, UK
| | - Guido Grassi
- Clinica Medica, University of Milano Bicocca, Milan, Italy
| | - Massimo Iacoviello
- University Cardiology Unit, Cardiothoracic Department, University Hospital, Bari, Italy
| | - Guido Parodi
- Clinical and Interventional Cardiology, Sassari University Hospital, Sassari, Italy
| | | | - Christian Templin
- University Heart Center, Department of Cardiology, University Hospital Zurich, Zurich, Switzerland
| | - Jelena R Ghadri
- University Heart Center, Department of Cardiology, University Hospital Zurich, Zurich, Switzerland
| | - Thomas Thum
- Hannover Medical School, Institute of Molecular and Translational Therapeutic Strategies, Hannover, Germany
| | - Ovidiu Chioncel
- Emergency Institute for Cardiovascular Diseases 'Prof. C.C. Iliescu', Bucharest, Romania and University of Medicine Carol Davila, Bucharest, Romania
| | - C Gabriele Tocchetti
- Department of Translational Medical Sciences and Interdepartmental Center for Clinical and Translational Research (CIRCET), Federico II University, Naples, Italy
| | | | - Stephane Heymans
- Department of Cardiology, CARIM School for Cardiovascular Diseases, Maastricht University Medical Centre, The Netherlands and Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology and Department of Cardiovascular Sciences, University of Leuven, Belgium
| | - Alexander R Lyon
- National Heart and Lung Institute, Imperial College, London, UK.,Department of Cardiology, Royal Brompton Hospital, London, United Kingdom
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4
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Citro R, Okura H, Ghadri JR, Izumi C, Meimoun P, Izumo M, Dawson D, Kaji S, Eitel I, Kagiyama N, Kobayashi Y, Templin C, Delgado V, Nakatani S, Popescu BA. Multimodality imaging in takotsubo syndrome: a joint consensus document of the European Association of Cardiovascular Imaging (EACVI) and the Japanese Society of Echocardiography (JSE). J Echocardiogr 2020; 18:199-224. [PMID: 32886290 PMCID: PMC7471594 DOI: 10.1007/s12574-020-00480-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 05/05/2020] [Indexed: 12/14/2022]
Abstract
Takotsubo syndrome (TTS) is a complex and still poorly recognized heart disease with a wide spectrum of possible clinical presentations. Despite its reversibility, it is associated with serious adverse in-hospital events and high complication rates during follow-up. Multimodality imaging is helpful for establishing the diagnosis, guiding therapy, and stratifying prognosis of TTS patients in both the acute and post-acute phase. Echocardiography plays a key role, particularly in the acute care setting, allowing for the assessment of left ventricular (LV) systolic and diastolic function and the identification of the typical apical-midventricular ballooning pattern, as well as the circumferential pattern of wall motion abnormalities. It is also useful in the early detection of complications (i.e. LV outflow tract obstruction, mitral regurgitation, right ventricular involvement, LV thrombi, and pericardial effusion) and monitoring of systolic function recovery. Left ventriculography allows the evaluation of LV function and morphology, identifying the typical TTS patterns when echocardiography is not available or wall motion abnormalities cannot be properly assessed with ultrasound. Cardiac magnetic resonance provides a more comprehensive depiction of cardiac morphology and function and tissue characterization and offers additional value to other imaging modalities for differential diagnosis (myocardial infarction and myocarditis). Coronary computed tomography angiography has a substantial role in the diagnostic workup of patients with acute chest pain and a doubtful TTS diagnosis to rule out other medical conditions. It can be considered as a non-invasive appropriate alternative to coronary angiography in several clinical scenarios. Although the role of nuclear imaging in TTS has not yet been well established, the combination of perfusion and metabolic imaging may provide useful information on myocardial function in both the acute and post-acute phase.
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Affiliation(s)
- Rodolfo Citro
- Cardiothoracic Vascular Department, University Hospital "San Giovanni di Dio e Ruggi d'Aragona", Salerno, Italy.
| | - Hiroyuki Okura
- Department of Cardiology, Gifu University Graduate School of Medicine, Gifu, Japan
| | - Jelena R Ghadri
- Department of Cardiology, University Hospital Zurich, Zurich, Switzerland
| | - Chisato Izumi
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Patrick Meimoun
- Department of Cardiology and Intensive Care, Centre Hospitalier de Compiegne, Compiegne, France
| | - Masaki Izumo
- Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Dana Dawson
- Department of Cardiology, Aberdeen Cardiovascular and Diabetes Centre, Aberdeen Royal Infirmary and University of Aberdeen, Aberdeen, Scotland, UK
| | - Shuichiro Kaji
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Ingo Eitel
- Department of Cardiology, University Heart Center Lübeck, Medical Clinic II (Cardiology/Angiology/Intensive Care Medicine), Lübeck, Germany
- Department of Cardiology, German Center for Cardiovascular Research (DZHK), partner site Hamburg/Kiel/Lübeck, Lübeck, Germany
| | - Nobuyuki Kagiyama
- Department of Digital Health and Telemedicine R&D, Juntendo University and Department of Cardiovascular Medicine, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo City, Tokyo, 113-8421, Japan
| | - Yukari Kobayashi
- Department of Cardiovascular Institute, Stanford University, Stanford, CA, USA
| | - Christian Templin
- Department of Cardiology, University Hospital Zurich, Zurich, Switzerland
| | - Victoria Delgado
- Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands
| | | | - Bogdan A Popescu
- Department of Cardiology, University of Medicine and Pharmacy "Carol Davila," Euroecolab, Bucharest, Romania
- Department of Cardiology, Emergency Institute for Cardiovascular Diseases "Prof. Dr. C. C. Iliescu", Bucharest, Romania
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5
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Citro R, Okura H, Ghadri JR, Izumi C, Meimoun P, Izumo M, Dawson D, Kaji S, Eitel I, Kagiyama N, Kobayashi Y, Templin C, Delgado V, Nakatani S, Popescu BA, Bertrand P, Donal E, Dweck M, Galderisi M, Haugaa KH, Sade LE, Stankovic I, Cosyns B, Edvardsen T. Multimodality imaging in takotsubo syndrome: a joint consensus document of the European Association of Cardiovascular Imaging (EACVI) and the Japanese Society of Echocardiography (JSE). Eur Heart J Cardiovasc Imaging 2020; 21:1184-1207. [DOI: 10.1093/ehjci/jeaa149] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 05/05/2020] [Indexed: 12/14/2022] Open
Abstract
Abstract
Takotsubo syndrome (TTS) is a complex and still poorly recognized heart disease with a wide spectrum of possible clinical presentations. Despite its reversibility, it is associated with serious adverse in-hospital events and high complication rates during follow-up. Multimodality imaging is helpful for establishing the diagnosis, guiding therapy, and stratifying prognosis of TTS patients in both the acute and post-acute phase. Echocardiography plays a key role, particularly in the acute care setting, allowing for the assessment of left ventricular (LV) systolic and diastolic function and the identification of the typical apical-midventricular ballooning pattern, as well as the circumferential pattern of wall motion abnormalities. It is also useful in the early detection of complications (i.e. LV outflow tract obstruction, mitral regurgitation, right ventricular involvement, LV thrombi, and pericardial effusion) and monitoring of systolic function recovery. Left ventriculography allows the evaluation of LV function and morphology, identifying the typical TTS patterns when echocardiography is not available or wall motion abnormalities cannot be properly assessed with ultrasound. Cardiac magnetic resonance provides a more comprehensive depiction of cardiac morphology and function and tissue characterization and offers additional value to other imaging modalities for differential diagnosis (myocardial infarction and myocarditis). Coronary computed tomography angiography has a substantial role in the diagnostic workup of patients with acute chest pain and a doubtful TTS diagnosis to rule out other medical conditions. It can be considered as a non-invasive appropriate alternative to coronary angiography in several clinical scenarios. Although the role of nuclear imaging in TTS has not yet been well established, the combination of perfusion and metabolic imaging may provide useful information on myocardial function in both the acute and post-acute phase.
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Affiliation(s)
- Rodolfo Citro
- Cardiothoracic Vascular Department, University Hospital “San Giovanni di Dio e Ruggi d’Aragona”, Salerno, Italy
| | - Hiroyuki Okura
- Department of Cardiology, Gifu University Graduate School of Medicine, Gifu, Japan
| | - Jelena R Ghadri
- Department of Cardiology, University Heart Center, University Hospital Zurich, Zurich, Switzerland
| | - Chisato Izumi
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Patrick Meimoun
- Department of Cardiology and Intensive Care, Centre Hospitalier de Compiegne, Compiegne, France
| | - Masaki Izumo
- Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Dana Dawson
- Department of Cardiology, Aberdeen Cardiovascular and Diabetes Centre, Aberdeen Royal Infirmary and University of Aberdeen, Aberdeen, Scotland, UK
| | - Shuichiro Kaji
- Department of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Ingo Eitel
- Department of Cardiology, University Heart Center Lübeck, Medical Clinic II (Cardiology/Angiology/Intensive Care Medicine), Lübeck, Germany
- Department of Cardiology, German Center for Cardiovascular Research (DZHK), partner site Hamburg/Kiel/Lübeck, Lübeck, Germany
| | - Nobuyuki Kagiyama
- Department of Digital Health and Telemedicine R&D, Juntendo University and Department of Cardiovascular Medicine, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo City, Tokyo, 113-8421, Japan
| | - Yukari Kobayashi
- Department of Cardiovascular Institute, Stanford University, Stanford, CA, USA
| | - Christian Templin
- Department of Cardiology, University Heart Center, University Hospital Zurich, Zurich, Switzerland
| | - Victoria Delgado
- Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands
| | | | - Bogdan A Popescu
- Department of Cardiology, University of Medicine and Pharmacy “Carol Davila,” Euroecolab, Bucharest, Romania
- Department of Cardiology, Emergency Institute for Cardiovascular Diseases “Prof. Dr. C. C. Iliescu”, Bucharest, Romania
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Ali A, Redfors B, Lundgren J, Alkhoury J, Oras J, Gan LM, Omerovic E. The importance of heart rate in isoprenaline-induced takotsubo-like cardiac dysfunction in rats. ESC Heart Fail 2020; 7:2690-2699. [PMID: 32686334 PMCID: PMC7524126 DOI: 10.1002/ehf2.12858] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 05/25/2020] [Accepted: 06/09/2020] [Indexed: 11/30/2022] Open
Abstract
Aims Takotsubo syndrome (TS) is an acute cardiac syndrome characterized by regional myocardial akinesia that cannot be attributed to a culprit lesion in coronary arteries. Cardiac overstimulation by catecholamines in the setting of stress is implicated in the pathogenesis of TS. While catecholamine‐induced alterations in cardiac contractility have been studied as part of the causal pathway in TS, the importance of catecholamine‐mediated tachycardia has not been studied. Our aim was to explore whether the reduction in heart rate, either by pharmacological suppression of the sinoatrial node with ivabradine or by surgical induction of third‐degree atrioventricular block, prevents isoprenaline‐induced TS‐like akinesia in an experimental animal model. Methods and results We used 142 female Sprague–Dawley rats in two separate protocols. The TS‐like phenotype was induced by an intraperitoneal bolus dose of isoprenaline (ISO) 50 mg/kg. In the first protocol, we randomized 54 rats to ivabradine 10 min before ISO (IVAB1), ivabradine 10 min after ISO (IVAB2), or saline 10 min before ISO (CONTROL). In the second protocol, we randomized 88 rats to surgically induced complete heart block (CHB) or sham operation (CTRL) 10 min before the administration of ISO. All drugs were administered intraperitoneally. We recorded heart rate and blood pressure invasively in the right carotid artery. Cardiac morphology and function were evaluated by high‐resolution echocardiography (VisualSonics 770 VEVO, Toronto, Ontario, Canada) 90 min after ISO injection. IVAB1 and IVAB2 rats had significantly lower heart rate and less pronounced TS‐like cardiac dysfunction than CONTROL. CHB rats had a lower (54%) heart rate, and no animal developed left ventricular akinesia. In the first protocol, the CONTROL group had a median degree of akinesia of 10.2 [inter‐quartile range (IQR) 0.0–18.6]. The IVAB1 group showed a median of akinesia of 0% (IQR 0.0–0.0, P < 0.001 vs. CONTROL). In the IVAB2 group, 5% had TS‐like dysfunction (P = 0.001). Ejection fraction was higher in both the IVAB1 (92%, IQR 89–95) and IVAB2 groups (93%, IQR 87–96) than in the CONTROL group (78%, IQR 63–87, P < 0.05). In the second protocol, the median degree of akinesia in the CTRL group was 21.9% (IQR 8.9–24.6). In the CHB group, no rat developed akinesia (median 0%; IQR 0.0–0.0, P < 0.001 vs. CONTROL). Ejection fraction was higher in the CHB group (90%, IQR 87–92) than in the CTRL group (51%, IQR 87–92, P < 0.05). Conclusions Isoprenaline‐induced TS‐like cardiac dysfunction can be prevented by lowering heart rate. Tachycardia may be an important part of the causal pathway in TS.
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Affiliation(s)
- Anwar Ali
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Björn Redfors
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Cardiology, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Joel Lundgren
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Jessica Alkhoury
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Jonatan Oras
- Department of Anesthesiology and Intensive Care Medicine, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Li-Ming Gan
- Department of Cardiology, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Early Clinical Development, Cardiovascular Renal and Metabolic Diseases, IMED Biotech Unit, AstraZeneca Gothenburg, Gothenburg, Sweden
| | - Elmir Omerovic
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Cardiology, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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7
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An Update on Cardiac Magnetic Resonance Imaging in Takotsubo Cardiomyopathy. CURRENT CARDIOVASCULAR IMAGING REPORTS 2020. [DOI: 10.1007/s12410-020-09536-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Abstract
Purpose of Review
To provide an update on the use of cardiac magnetic resonance imaging in the diagnosis of Takotsubo cardiomyopathy.
Recent Findings
Long-term prognosis of Takotsubo cardiomyopathy may not be as clear-cut as previously thought. Cardiac magnetic resonance imaging not only allows differentiation between reversible and nonreversible changes but has an emerging role in identifying cellular level changes associated with prognostic indicators such as myocardial energetics using 31P-CMR spectroscopy and detection of myocardial inflammation overlying myocardial oedema, using ultrasmall paramagnetic iron oxide particle uptake in macrophages.
Summary
Takotsubo cardiomyopathy is a non-ischemic acute heart failure syndrome. It is commonly triggered by emotional or physical stress and is possibly the strongest psychosomatic interaction seen in medicine. While clinically its presentation mimics a myocardial infarction, the acute imaging characteristics are critical in correctly identifying the disease entity.
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8
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Gupta S, Goyal P, Idrees S, Aggarwal S, Bajaj D, Mattana J. Association of Endocrine Conditions With Takotsubo Cardiomyopathy: A Comprehensive Review. J Am Heart Assoc 2018; 7:e009003. [PMID: 30371307 PMCID: PMC6404898 DOI: 10.1161/jaha.118.009003] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Sonali Gupta
- Department of MedicineSt. Vincent's Medical CenterBridgeportCT
- The Frank H. Netter MD School of Medicine at Quinnipiac UniversityNorth HavenCT
| | - Pradeep Goyal
- The Frank H. Netter MD School of Medicine at Quinnipiac UniversityNorth HavenCT
- Department of RadiologySt. Vincent's Medical CenterBridgeportCT
| | - Sana Idrees
- Department of MedicineSt. Vincent's Medical CenterBridgeportCT
- The Frank H. Netter MD School of Medicine at Quinnipiac UniversityNorth HavenCT
| | - Sourabh Aggarwal
- Cardiology DivisionDepartment of MedicineUniversity of Nebraska Medical CenterOmahaNE
| | - Divyansh Bajaj
- Department of MedicineSt. Vincent's Medical CenterBridgeportCT
- The Frank H. Netter MD School of Medicine at Quinnipiac UniversityNorth HavenCT
| | - Joseph Mattana
- Department of MedicineSt. Vincent's Medical CenterBridgeportCT
- The Frank H. Netter MD School of Medicine at Quinnipiac UniversityNorth HavenCT
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9
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Izumo M, Akashi YJ. Role of echocardiography for takotsubo cardiomyopathy: clinical and prognostic implications. Cardiovasc Diagn Ther 2018; 8:90-100. [PMID: 29541614 PMCID: PMC5835647 DOI: 10.21037/cdt.2017.07.03] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 06/28/2017] [Indexed: 12/26/2022]
Abstract
Takotsubo cardiomyopathy (TTC) is newly-described secondary cardiomyopathy characterized by transient left ventricular (LV) dysfunction, which is increasingly recognized in the field of cardiology. TTC occurs in approximately 2% of the patients with acute coronary syndrome. Its onset is rare; however, its specific features play a crucial role in diagnosing the chest pain in clinical practice. TTC has generally favorable outcome with rapid recovery of LV function; however, an increasing evidence suggests that it should be regarded as a more serious acute cardiac disorder with a variety of complications. Owing to its widespread availability, even in emergency settings, transthoracic echocardiography plays a key role in the diagnostic assessment of TTC and contributes to an increased number of disease detection and incidence reports in contemporary clinical practice. This review focuses on the role of echocardiography in understanding the clinical prognostic implications in patients with TTC.
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Affiliation(s)
- Masaki Izumo
- Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Yoshihiro J Akashi
- Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan
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10
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Manginas A, Rigopoulos AG, Bigalke B, Sakellaropoulos S, Ali M, Mavrogeni S, Noutsias M. Takotsubo syndrome - adding pieces to a complex puzzle. BMC Cardiovasc Disord 2017; 17:296. [PMID: 29262793 PMCID: PMC5738840 DOI: 10.1186/s12872-017-0731-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 12/10/2017] [Indexed: 12/26/2022] Open
Abstract
Takotsubo syndrome, a form of acutely decompensated heart failure, has drawn interest because of its intriguing pathophysiology and therapeutic dilemmas. In their recent work in BMC Cardiovascular Disorders, Abanador-Kamper et al. describe the therapy management in these patients and add valuable information on cardiovascular magnetic resonance imaging evolution.
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Affiliation(s)
- Athanassios Manginas
- Interventional Cardiology and Cardiology Department, Mediterraneo Hospital, Ilias Street 8-12, GR-16675, Glyfada, Greece.
| | - Angelos G Rigopoulos
- Department of Internal Medicine III, Division of Cardiology, Angiology and Intensive Medical Care, University Hospital Halle, Martin-Luther-University Halle, Ernst-Grube-Straße 40, 06120, Halle (Saale), Germany
| | - Boris Bigalke
- Department of Cardiology, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin (CBF), Berlin, Germany
| | - Stefanos Sakellaropoulos
- Department of Internal Medicine III, Division of Cardiology, Angiology and Intensive Medical Care, University Hospital Halle, Martin-Luther-University Halle, Ernst-Grube-Straße 40, 06120, Halle (Saale), Germany
| | - Muhammad Ali
- Department of Cardiology, Asklepios Harzklinik Goslar, Goslar, Germany
| | - Sophie Mavrogeni
- Department of Cardiology, Onassis Cardiac Syrgery Center, Leoforou Andrea Sygrou 356, Kallithea, 17674, Athens, Greece
| | - Michel Noutsias
- Department of Internal Medicine III, Division of Cardiology, Angiology and Intensive Medical Care, University Hospital Halle, Martin-Luther-University Halle, Ernst-Grube-Straße 40, 06120, Halle (Saale), Germany
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11
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Abstract
Takotsubo syndrome (TS) is characterized by severe reversible left ventricular (LV) wall motion abnormality in the absence of explanatory coronary lesion. Despite an increasing number of patients diagnosed with TS worldwide, there are no randomized clinical trials. In mild cases, no treatment or a short course of limited anticoagulation therapy may be sufficient. Positive inotropic and vasodilating agents should be avoided. In severe cases with refractory cardiogenic shock, early treatment with mechanical support using venoarterial extracorporeal membrane oxygenation or a LV assist device should be considered.
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Affiliation(s)
- Elmir Omerovic
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Bruna stråket 16, Gothenburg, Sweden; Department of Cardiology, Sahlgrenska University Hospital, Bruna stråket 16, Gothenburg 413 45, Sweden.
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12
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Abstract
OBJECTIVE The aim of the study was to investigate the meaning of narrated symptoms in connection to takotsubo syndrome. DESIGN, METHOD, PARTICIPANTS AND SETTING Qualitative study consisting of 25 interviews, 23 women and 2 men aged 39-84 and living in Region Västra Götaland, Sweden. The transcribed text was analysed with phenomenological hermeneutics. RESULTS The interviewees reported a large number of symptoms before, during and after the acute onset of takotsubo syndrome, including pain, affected breathing, lassitude, malaise and nausea. Several of these have not been reported previously. Symptoms before the acute onset were, even if they had been prominent, ignored by the interviewees for various reasons. During the acute phase, the symptoms could no longer be ignored and the interviewees sought healthcare. The remaining residual symptom after discharge from hospital caused a great deal of worry because the interviewees feared that they would be permanent and they felt they could not live this way. On the whole, becoming ill and having a large number of symptoms greatly impacted the lives of the interviewees and made them re-evaluate how they had been living. Furthermore, they reported feeling alone and lost regarding their symptom burden, especially in relation to their residual symptoms, which affected their health and ability to return to daily life. CONCLUSIONS Acute symptoms, and symptoms before and after the acute ones, are a major part of the illness experience for patients with takotsubo syndrome and affect their health and well-being. Assessment of symptoms should be an integrated part of care to promote health. One way of achieving this is through the patients' own narratives of their experiences, which are an important component in person-centred care.
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Affiliation(s)
- Sara Wallström
- Institute of Health and Care Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- University of Gothenburg Centre for Person-Centred Care (GPCC), Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Kerstin Ulin
- Institute of Health and Care Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- University of Gothenburg Centre for Person-Centred Care (GPCC), Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Elmir Omerovic
- Department of Cardiology, Sahlgrenska University Hospital, Gothenburg, Sweden
- Department of Molecular and Clinical Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Inger Ekman
- Institute of Health and Care Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- University of Gothenburg Centre for Person-Centred Care (GPCC), Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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Lyon AR, Bossone E, Schneider B, Sechtem U, Citro R, Underwood SR, Sheppard MN, Figtree GA, Parodi G, Akashi YJ, Ruschitzka F, Filippatos G, Mebazaa A, Omerovic E. Current state of knowledge on Takotsubo syndrome: a Position Statement from the Taskforce on Takotsubo Syndrome of the Heart Failure Association of the European Society of Cardiology. Eur J Heart Fail 2015; 18:8-27. [PMID: 26548803 DOI: 10.1002/ejhf.424] [Citation(s) in RCA: 743] [Impact Index Per Article: 82.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 07/25/2015] [Accepted: 08/04/2015] [Indexed: 12/22/2022] Open
Abstract
Takotsubo syndrome is an acute reversible heart failure syndrome that is increasingly recognized in modern cardiology practice. This Position Statement from the European Society of Cardiology Heart Failure Association provides a comprehensive review of the various clinical and pathophysiological facets of Takotsubo syndrome, including nomenclature, definition, and diagnosis, primary and secondary clinical subtypes, anatomical variants, triggers, epidemiology, pathophysiology, clinical presentation, complications, prognosis, clinical investigations, and treatment approaches. Novel structured approaches to diagnosis, risk stratification, and management are presented, with new algorithms to aid decision-making by practising clinicians. These also cover more complex areas (e.g. uncertain diagnosis and delayed presentation) and the management of complex cases with ongoing symptoms after recovery, recurrent episodes, or spontaneous presentation. The unmet needs and future directions for research in this syndrome are also discussed.
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Affiliation(s)
- Alexander R Lyon
- National Heart and Lung Institute, Imperial College, London, UK.,NIHR Cardiovascular Biomedical Research Unit, Royal Brompton Hospital, London, UK
| | - Eduardo Bossone
- Cardiology Division, 'Cava de Tirreni and Amalfi Coast' Hospital, Heart Department, University of Salerno, Italy
| | | | - Udo Sechtem
- Department of Cardiology, Robert Bosch Krankenhaus, Stuttgart, Germany
| | - Rodolfo Citro
- University Hospital 'San Giovanni di Dio e Ruggi d'Aragona', Heart Department, Largo Città di Ippocrate, Salerno, Italy
| | - S Richard Underwood
- National Heart and Lung Institute, Imperial College, London, UK.,NIHR Cardiovascular Biomedical Research Unit, Royal Brompton Hospital, London, UK
| | - Mary N Sheppard
- Department of Cardiovascular Pathology, St George's University Medical School, London, UK
| | - Gemma A Figtree
- North Shore Heart Research, Kolling Institute, University of Sydney, Australia.,Department of Cardiology, Royal North Shore Hospital, Sydney, Australia
| | - Guido Parodi
- Invasive Cardiology, Careggi Hospital, Florence, Italy
| | - Yoshihiro J Akashi
- Division of Cardiology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Frank Ruschitzka
- Clinic for Cardiology, University Hospital Zurich, Zurich, Switzerland
| | - Gerasimos Filippatos
- Department of Cardiology, Attikon University Hospital, University of Athens Medical School, Athens, Greece
| | - Alexandre Mebazaa
- Université Paris Diderot; U942 Inserm, Département d'Anestéhsie-Réanimation Hôpitaux Universitaires Saint Louis-Lariboisière, Paris, France
| | - Elmir Omerovic
- Department of Molecular and Clinical Medicine/Cardiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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Shao Y, Redfors B, Ali A, Bossone E, Lyon A, Omerovic E. Takotsubo syndrome and McConnell's phenomenon. Int J Cardiol 2015; 197:349-50. [PMID: 26164584 DOI: 10.1016/j.ijcard.2015.06.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 06/16/2015] [Indexed: 01/31/2023]
Affiliation(s)
- Yangzhen Shao
- Department of Molecular and Clinical Medicine, Institute of Medicine, Gothenburg University, Sweden; Department of Cardiology, Sahlgrenska University Hospital, Gothenburg, Sweden.
| | - Björn Redfors
- Department of Molecular and Clinical Medicine, Institute of Medicine, Gothenburg University, Sweden; Department of Cardiology, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Anwar Ali
- Department of Molecular and Clinical Medicine, Institute of Medicine, Gothenburg University, Sweden
| | - Eduardo Bossone
- Cardiology Unit, Azienda Ospedaliera-Universitaria of Salerno, Salerno, Italy
| | - Alexander Lyon
- Cardiovascular Biomedical Research Unit, Royal Brompton Hospital, London, UK
| | - Elmir Omerovic
- Department of Molecular and Clinical Medicine, Institute of Medicine, Gothenburg University, Sweden; Department of Cardiology, Sahlgrenska University Hospital, Gothenburg, Sweden
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16
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Madias JE. Left ventricular outflow tract obstruction and Takotsubo syndrome: A heretofore unsettled pathophysiologic association. Int J Cardiol 2015; 188:58-9. [DOI: 10.1016/j.ijcard.2015.04.042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 04/03/2015] [Indexed: 10/23/2022]
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Madias JE. Plausible speculations on the pathophysiology of Takotsubo syndrome. Int J Cardiol 2015; 188:19-21. [DOI: 10.1016/j.ijcard.2015.04.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Accepted: 04/01/2015] [Indexed: 12/28/2022]
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Abstract
Takotsubo syndrome is an acute cardiac syndrome first described in 1990 and characterized by transient left ventricular dysfunction affecting more than one coronary artery territory, often in a circumferential apical, mid-ventricular, or basal distribution. Several pathophysiological explanations have been proposed for this syndrome and its intriguing appearance, and awareness is growing that these explanations might not be mutually exclusive. The reversible apical myocardial dysfunction observed might result from more than one pathophysiological phenomenon. The pathophysiology of Takotsubo syndrome is complex and integrates neuroendocrine physiology, potentially involving the cognitive centres of the brain, and including the hypothalamic-pituitary-adrenal axis. Cardiovascular responses are caused by the sudden sympathetic activation and surge in concentrations of circulating catecholamines. The multiple morphological changes seen in the myocardium match those seen after catecholamine-induced cardiotoxicity. The acute prognosis and recurrence rate are now known to be worse than initially thought, and much still needs to be learned about the epidemiology and the underlying pathophysiology of this fascinating condition in order to improve diagnostic and treatment pathways.
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Affiliation(s)
- Yoshihiro J Akashi
- Division of Cardiology, Department of Internal Medicine, St Marianna University School of Medicine, 2-16-1 Sugao Miyamae-ku, Kawasaki City, Kanagawa 216-8511, Japan
| | - Holger M Nef
- Medizinische Klinik I, Kardiologie und Angiologie, Universitätsklinikum Gießen, Rudolf-Buchheim-Straße 8, Gießen 35392, Germany
| | - Alexander R Lyon
- NIHR Cardiovascular Biomedical Research Unit, Royal Brompton Hospital and Imperial College, Sydney Street, London SW3 6NP, UK
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19
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Baroreceptor dysfunction, diabetes mellitus, and takotsubo syndrome: An intricate triangle needing exploration. Int J Cardiol 2015; 184:517-518. [DOI: 10.1016/j.ijcard.2015.02.108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 02/26/2015] [Indexed: 11/19/2022]
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20
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Madias JE. On the quest of unraveling the pathophysiology of Takotsubo syndrome. Int J Cardiol 2015; 182:27-8. [DOI: 10.1016/j.ijcard.2014.12.121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Accepted: 12/29/2014] [Indexed: 11/28/2022]
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21
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High-Sensitive Troponin T and N-Terminal Pro B-Type Natriuretic Peptide for Early Detection of Stress-Induced Cardiomyopathy in Patients with Subarachnoid Hemorrhage. Neurocrit Care 2015; 23:233-42. [DOI: 10.1007/s12028-015-0108-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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22
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Shao Y, Redfors B, Ali A, Bossone E, Lyon A, Omerovic E. McConnell's sign — An insight into the pathogenesis of Takotsubo syndrome? Int J Cardiol 2015; 178:40-3. [DOI: 10.1016/j.ijcard.2014.10.143] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 10/22/2014] [Indexed: 12/16/2022]
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23
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Ali A, Redfors B, Omerovic E. How baroreceptor dysfunction could predispose to the takotsubo syndrome. Int J Cardiol 2014; 182:105-6. [PMID: 25577743 DOI: 10.1016/j.ijcard.2014.12.148] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Accepted: 12/29/2014] [Indexed: 02/05/2023]
Affiliation(s)
- Anwar Ali
- Department of Molecular and Clinical Medicine/C, Sahlgrenska Academy, Gothenburg University, Sweden
| | - Björn Redfors
- Department of Cardiology, Sahlgrenska University Hospital, Gothenburg, Sweden; Department of Molecular and Clinical Medicine/C, Sahlgrenska Academy, Gothenburg University, Sweden.
| | - Elmir Omerovic
- Department of Cardiology, Sahlgrenska University Hospital, Gothenburg, Sweden; Department of Molecular and Clinical Medicine/C, Sahlgrenska Academy, Gothenburg University, Sweden
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24
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Current hypotheses regarding the pathophysiology behind the takotsubo syndrome. Int J Cardiol 2014; 177:771-9. [DOI: 10.1016/j.ijcard.2014.10.156] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Revised: 10/23/2014] [Accepted: 10/24/2014] [Indexed: 01/15/2023]
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Madias JE. Takotsubo syndrome as a complication of Pickering syndrome, and perhaps hypertensive emergencies. Int J Cardiol 2014; 176:266-7. [DOI: 10.1016/j.ijcard.2014.06.099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 06/29/2014] [Indexed: 11/29/2022]
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Madias JE. Coronary vasospasm is an unlikely cause of Takotsubo syndrome, although we should keep an open mind. Int J Cardiol 2014; 176:1-5. [PMID: 25043215 DOI: 10.1016/j.ijcard.2014.06.069] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Accepted: 06/29/2014] [Indexed: 12/12/2022]
Abstract
This viewpoint pertains to the still elusive pathophysiology of the Takotsubo syndrome (TTS), maintaining the position that this affliction is not the result of coronary vasospasm (CV) involving one or more coronary arteries. Although CV has been rarely encountered in the acute stage of TTS, or elicited via provocative testing in the subacute stage of the disease, it does not appear to be the cause of TTS as shown by the bulk of the published relevant literature. The author provides some speculations to explain the spontaneous appearance of CV, or its artificial elicitation, in some patients with TTS. However while we are striving to unravel the pathophysiology of TTS, we should keep an open mind about a possible role for CV in the causation of TTS.
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Affiliation(s)
- John E Madias
- Icahn School of Medicine at Mount Sinai, New York, NY, United States; Division of Cardiology, Elmhurst Hospital Center, Elmhurst, NY, United States.
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Wright PT, Tranter MH, Morley-Smith AC, Lyon AR. Pathophysiology of takotsubo syndrome: temporal phases of cardiovascular responses to extreme stress. Circ J 2014; 78:1550-8. [PMID: 24954393 DOI: 10.1253/circj.cj-14-0623] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Takotsubo syndrome (TTS), also known as takotsubo cardiomyopathy, is an acute heart failure syndrome that typically occurs after a period of great emotional stress. The archetypal patient is a postmenopausal woman who presents with chest pain, ST-segment elevation and acute hypokinesia of the apical and middle segment of the left ventricle that extends beyond the territory of a single coronary artery, coupled with hyperkinesia of the basal myocardium. Recent preclinical and clinical studies have shown the importance of high catecholamine levels in precipitating TTS. We propose that this is caused by activation of β-adrenoceptors and the subsequent activation of a negatively-inotropic pathway, perhaps to protect the heart from catecholamine overload. We explore the pathophysiology of TTS according to its "phases", both preclinically and clinically. This will show that the condition is not one of static apical hypokinesia that simply improves, but rather a dynamic condition that changes as the disease progresses. We hope that further exploration of TTS using its "phases" will aid in its characterization, diagnosis and treatment.
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Affiliation(s)
- Peter T Wright
- National Heart and Lung Institute, Imperial College London
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Redfors B, Ali A, Shao Y, Lundgren J, Gan LM, Omerovic E. Different catecholamines induce different patterns of takotsubo-like cardiac dysfunction in an apparently afterload dependent manner. Int J Cardiol 2014; 174:330-6. [DOI: 10.1016/j.ijcard.2014.04.103] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Accepted: 04/06/2014] [Indexed: 02/05/2023]
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Madias JE. Ventricular wall stress and late gadolinium enhancement in patients with Takotsubo syndrome: More data worth contemplating about. Int J Cardiol 2014; 173:339. [DOI: 10.1016/j.ijcard.2014.03.038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Accepted: 03/09/2014] [Indexed: 11/24/2022]
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