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Caldonazo T, Musleh R, Moschovas A, Kirov H, Franz M, Haeusler KG, Faerber G, Doenst T, Günther A, Diab M. Antithrombotic Therapy in Patients With Infective Endocarditis: A Systematic Review and Meta-Analysis. JACC. ADVANCES 2024; 3:100768. [PMID: 38939390 PMCID: PMC11198087 DOI: 10.1016/j.jacadv.2023.100768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 10/03/2023] [Accepted: 10/20/2023] [Indexed: 06/29/2024]
Abstract
Background Antithrombotic therapy (ATT) in patients with infective endocarditis (IE) is challenging. Objectives The authors evaluated the impact of anticoagulant and antiplatelet therapy on clinical endpoints in IE patients. Methods We performed a systematic review and meta-analysis comparing IE patients with prior and/or ongoing use of ATT vs those without any ATT during IE course. Primary outcome was reported in-hospital cerebrovascular events. Secondary outcomes were in-hospital mortality, intracranial hemorrhage (ICH), systemic thromboembolism (ST), and mortality within 6 months. Results Twelve studies, with a total of 12,151 patients, were included. The primary endpoint was not different comparing 10,115 IE patients with or without prior anticoagulation (OR: 1.10; 95% CI: 0.56-2.17; P = 0.77) or comparing 838 IE patients with or without prior antiplatelet (OR: 0.90; 95% CI: 0.61-1.33; P = 0.61). In-hospital mortality was lower in IE patients with prior anticoagulation compared to those without (OR: 0.74; 95% CI: 0.57-0.96; P = 0.03). There was no difference in reported ICH rates between patients with or without prior anticoagulation (OR: 0.54; 95% CI: 0.27-1.09; P = 0.09) or between patients with or without prior antiplatelet (OR: 0.35; 95% CI: 0.11-1.10; P = 0.07). The rate of ST was lower in IE patients with prior antiplatelet therapy compared to those without (OR: 0.53; 95% CI: 0.38-0.72; P < 0.01). Conclusions ATT in IE patients was not associated with higher frequency of cerebrovascular events or ICH. Moreover, we found that the use of anticoagulation was associated with decreased in-hospital mortality and the use of antiplatelets was associated with decreased ST. Due to the limitations of this study, these results should be interpreted cautiously showing the necessity of a randomized setup.
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Affiliation(s)
- Tulio Caldonazo
- Department of Cardiothoracic Surgery, Friedrich-Schiller-University, Jena, Germany
| | - Rita Musleh
- Department of Neurology, Friedrich-Schiller-University, Jena, Germany
| | - Alexandros Moschovas
- Department of Thoracic and Cardiovascular Surgery, University Hospital Würzburg, Würzburg, Germany
| | - Hristo Kirov
- Department of Cardiothoracic Surgery, Friedrich-Schiller-University, Jena, Germany
| | - Marcus Franz
- Department of Cardiology, Friedrich-Schiller-University, Jena, Germany
| | - Karl Georg Haeusler
- Department of Neurology, University Hospital of Würzburg (UKW), Würzburg, Germany
| | - Gloria Faerber
- Department of Cardiothoracic Surgery, Friedrich-Schiller-University, Jena, Germany
| | - Torsten Doenst
- Department of Cardiothoracic Surgery, Friedrich-Schiller-University, Jena, Germany
| | - Albrecht Günther
- Department of Neurology, Friedrich-Schiller-University, Jena, Germany
| | - Mahmoud Diab
- Department of Cardiothoracic Surgery, Friedrich-Schiller-University, Jena, Germany
- Department of Cardiac Surgery, Herz-und Kreislaufzentrum, Rotenburg an der Fulda, Germany
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Lee TTL, Chan SCL, Chou OHI, Lee S, Chan JSK, Liu T, Chang C, Wong WT, Lip GYH, Cheung BMY, Wai AKC, Tse G. Initiation of warfarin is associated with decreased mortality in patients with infective endocarditis: A population-based cohort study. Thromb Res 2024; 233:1-9. [PMID: 37979284 DOI: 10.1016/j.thromres.2023.11.009] [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: 07/07/2023] [Revised: 11/03/2023] [Accepted: 11/06/2023] [Indexed: 11/20/2023]
Abstract
IMPORTANCE The use of warfarin to prevent thromboembolism in patients with infective endocarditis (IE) remains controversial due to potentially increased bleeding risks. DESIGN Population-based retrospective cohort study. PARTICIPANTS Patients aged 18 or older and diagnosed with IE in Hong Kong between January 1st, 1997 and August 31st, 2020 were included. Patients with use of any anticoagulant 30 days before IE diagnosis were excluded. Patients initiated on warfarin within 14 days of IE diagnosis and patients without warfarin use were matched for baseline characteristics using 1:1 propensity score matching. EXPOSURE Warfarin use within 14 days of IE diagnosis. MAIN OUTCOMES AND MEASURES Patients were followed up to 90 days for the outcomes of ischemic stroke, all-cause mortality, intracranial hemorrhage, and gastrointestinal bleeding. Cox regression was used to determine hazard ratios (HRs) [95 % confidence intervals (CIs)] between treatment groups. Fine-Gray competing risk regression with all-cause mortality as the competing event was performed as a sensitivity analysis. In addition to 90-day analyses, landmark analyses were performed at 30 days of follow-up. RESULTS The matched cohort consisted of 675 warfarin users (57.0 % male, age 59 ± 16 years) and 675 warfarin non-users (53.5 % male, age 61 ± 19 years). Warfarin users had a 50 % decreased 90-day risk in all-cause mortality (HR:0.50 [0.39-0.65]), without significantly different 90-day risks of ischemic stroke (HR:1.04 [0.70-1.53]), intracranial hemorrhage (HR:1.25 [0.77-2.04]), and gastrointestinal bleeding (HR:1.04 [0.60-1.78]). Thirty-day landmark analysis showed similar results. Competing risk regression showed significantly higher 30-day cumulative incidence of intracranial hemorrhage in warfarin users (sub-HR:3.34 [1.34-8.31]), but not at 90-day (sub-HR:1.63 [0.95-2.81]). Results from Fine-Gray regression were otherwise congruent with those from Cox regression. CONCLUSIONS AND RELEVANCE Warfarin initiated within 14 days of IE diagnosis was associated with significantly decreased risks of mortality but higher risks of intracranial hemorrhage, with similar risks of ischemic stroke and gastrointestinal bleeding, compared with non-use of warfarin with 14 days of IE diagnosis. KEY POINTS Question: Is warfarin, initiated within 14 days of a diagnosis of infective endocarditis (IE), efficacious and safe? FINDINGS In this propensity score-matched, population-based, prospective cohort study from Hong Kong, warfarin use within 14 days of IE diagnosis was associated with a 50 % decrease in the risk of all-cause mortality, albeit with higher risk of intracranial hemorrhage, and without significant differences in the risk of ischaemic stroke and gastrointestinal bleeding. Meaning: In patients with IE, warfarin use within 14 days of diagnosis may have mortality benefits, despite increased risks of intracranial hemorrhage.
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Affiliation(s)
- Teddy Tai Loy Lee
- Department of Emergency Medicine, School of Clinical Medicine, The University of Hong Kong, Hong Kong, China; Cardiovascular Pharmacology Unit, Cardiovascular Analytics Group, PowerHealth Research Institute, Hong Kong, China.
| | - Sunny Ching Long Chan
- Department of Emergency Medicine, School of Clinical Medicine, The University of Hong Kong, Hong Kong, China.
| | - Oscar Hou In Chou
- Cardiovascular Pharmacology Unit, Cardiovascular Analytics Group, PowerHealth Research Institute, Hong Kong, China; Division of Clinical Pharmacology, School of Clinical Medicine, The University of Hong Kong, Hong Kong, China.
| | - Sharen Lee
- Cardiovascular Pharmacology Unit, Cardiovascular Analytics Group, PowerHealth Research Institute, Hong Kong, China.
| | - Jeffrey Shi Kai Chan
- Cardiovascular Pharmacology Unit, Cardiovascular Analytics Group, PowerHealth Research Institute, Hong Kong, China.
| | - Tong Liu
- Tianjin Institute of Cardiology, The Second Hospital of Tianjin Medical University, Tianjin 300211, China.
| | - Carlin Chang
- Division of Neurology, Department of Medicine, Queen Mary Hospital and The University of Hong Kong, Hong Kong, China.
| | - Wing Tak Wong
- State Key Laboratory of Agrobiotechnology (CUHK), School of Life Sciences, The Chinese University of Hong Kong, Hong Kong, China.
| | - Gregory Y H Lip
- Liverpool Centre for Cardiovascular Science at University of Liverpool, Liverpool John Moores University and Liverpool Heart & Chest Hospital, Liverpool, United Kingdom; Department of Clinical Medicine, Aalborg University, Aalborg, Denmark.
| | - Bernard Man Yung Cheung
- Division of Clinical Pharmacology, School of Clinical Medicine, The University of Hong Kong, Hong Kong, China.
| | - Abraham Ka-Chung Wai
- Department of Emergency Medicine, School of Clinical Medicine, The University of Hong Kong, Hong Kong, China.
| | - Gary Tse
- Tianjin Institute of Cardiology, The Second Hospital of Tianjin Medical University, Tianjin 300211, China; Kent and Medway Medical School, University of Kent and Canterbury Christ Church University, Canterbury, United Kingdom; School of Nursing and Health Studies, Hong Kong Metropolitan University, Hong Kong, China.
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Greco A, Occhipinti G, Giacoppo D, Agnello F, Laudani C, Spagnolo M, Mauro MS, Rochira C, Finocchiaro S, Mazzone PM, Faro DC, Landolina D, Ammirabile N, Imbesi A, Raffo C, Capodanno D. Antithrombotic Therapy for Primary and Secondary Prevention of Ischemic Stroke: JACC State-of-the-Art Review. J Am Coll Cardiol 2023; 82:1538-1557. [PMID: 37793752 DOI: 10.1016/j.jacc.2023.07.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 07/05/2023] [Accepted: 07/12/2023] [Indexed: 10/06/2023]
Abstract
Stroke is a devastating condition with significant morbidity and mortality worldwide. Antithrombotic therapy plays a crucial role in both primary and secondary prevention of stroke events. Single or dual antiplatelet therapy is generally preferred in cases of large-artery atherosclerosis and small-vessel disease, whereas anticoagulation is recommended in conditions of blood stasis or hypercoagulable states that mostly result in red thrombi. However, the benefit of antithrombotic therapies must be weighed against the increased risk of bleeding, which can pose significant challenges in the pharmacological management of this condition. This review provides a comprehensive summary of the currently available evidence on antithrombotic therapy for ischemic stroke and outlines an updated therapeutic algorithm to support physicians in tailoring the strategy to the individual patient and the underlying mechanism of stroke.
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Affiliation(s)
- Antonio Greco
- Division of Cardiology, Azienda Ospedaliero-Universitaria Policlinico "G. Rodolico-San Marco," University of Catania, Catania, Italy. https://twitter.com/AGrecoMD
| | - Giovanni Occhipinti
- Division of Cardiology, Azienda Ospedaliero-Universitaria Policlinico "G. Rodolico-San Marco," University of Catania, Catania, Italy
| | - Daniele Giacoppo
- Division of Cardiology, Azienda Ospedaliero-Universitaria Policlinico "G. Rodolico-San Marco," University of Catania, Catania, Italy
| | - Federica Agnello
- Division of Cardiology, Azienda Ospedaliero-Universitaria Policlinico "G. Rodolico-San Marco," University of Catania, Catania, Italy
| | - Claudio Laudani
- Division of Cardiology, Azienda Ospedaliero-Universitaria Policlinico "G. Rodolico-San Marco," University of Catania, Catania, Italy
| | - Marco Spagnolo
- Division of Cardiology, Azienda Ospedaliero-Universitaria Policlinico "G. Rodolico-San Marco," University of Catania, Catania, Italy
| | - Maria Sara Mauro
- Division of Cardiology, Azienda Ospedaliero-Universitaria Policlinico "G. Rodolico-San Marco," University of Catania, Catania, Italy
| | - Carla Rochira
- Division of Cardiology, Azienda Ospedaliero-Universitaria Policlinico "G. Rodolico-San Marco," University of Catania, Catania, Italy
| | - Simone Finocchiaro
- Division of Cardiology, Azienda Ospedaliero-Universitaria Policlinico "G. Rodolico-San Marco," University of Catania, Catania, Italy
| | - Placido Maria Mazzone
- Division of Cardiology, Azienda Ospedaliero-Universitaria Policlinico "G. Rodolico-San Marco," University of Catania, Catania, Italy
| | - Denise Cristiana Faro
- Division of Cardiology, Azienda Ospedaliero-Universitaria Policlinico "G. Rodolico-San Marco," University of Catania, Catania, Italy
| | - Davide Landolina
- Division of Cardiology, Azienda Ospedaliero-Universitaria Policlinico "G. Rodolico-San Marco," University of Catania, Catania, Italy
| | - Nicola Ammirabile
- Division of Cardiology, Azienda Ospedaliero-Universitaria Policlinico "G. Rodolico-San Marco," University of Catania, Catania, Italy
| | - Antonino Imbesi
- Division of Cardiology, Azienda Ospedaliero-Universitaria Policlinico "G. Rodolico-San Marco," University of Catania, Catania, Italy
| | - Carmelo Raffo
- Division of Cardiology, Azienda Ospedaliero-Universitaria Policlinico "G. Rodolico-San Marco," University of Catania, Catania, Italy
| | - Davide Capodanno
- Division of Cardiology, Azienda Ospedaliero-Universitaria Policlinico "G. Rodolico-San Marco," University of Catania, Catania, Italy.
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Zhu X, Wang Z, Ferrari MW, Ferrari-Kuehne K, Hsi DH, Tse G, Zhou Q, Liang H, Zhang Y, Zhang J. Management of anticoagulation in patients with infective endocarditis. Thromb Res 2023; 229:15-25. [PMID: 37390524 DOI: 10.1016/j.thromres.2023.06.010] [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: 10/19/2022] [Revised: 06/05/2023] [Accepted: 06/09/2023] [Indexed: 07/02/2023]
Abstract
Infective endocarditis (IE) carries a high risk of vascular complications (e.g., cerebral embolism, intracerebral hemorrhage, and renal infarction), which are correlated with increased early and late mortality. Although anticoagulation is the cornerstone for management of thromboembolic complications, it remains controversial and challenging in patients with IE. An appropriate anticoagulation strategy is crucial to improving outcomes and requires a good understanding of the indication, timing, and regimen of anticoagulation in the setting of IE. Observational studies have shown that anticoagulant treatment failed to reduce the risk of ischemic stroke in patents with IE, supporting that IE alone is not an indication for anticoagulation. In the absence of randomized controlled trials and high-quality meta-analyses, however, current guidelines on IE were based largely on observational data and expert opinion, providing few specific recommendations on anticoagulation. A multidisciplinary approach and patient engagement are required to determine the timing and regimen of anticoagulation in patients with IE, especially in specific situations (e.g., receiving warfarin anticoagulation at the time of IE diagnosis, cerebral embolism or ischemic stroke, intracerebral hemorrhage, or urgent surgery). Collectively, individualized strategies on anticoagulation management of IE should be based on clinical evaluation, available evidence, and patient engagement, and ultimately be developed by the multidisciplinary team.
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Affiliation(s)
- Xiaogang Zhu
- Department of Cardiology, Fu Xing Hospital, Capital Medical University, China
| | - Zhenhua Wang
- Department of Cardiology, Second Affiliated Hospital of Fujian Medical University, China
| | - Markus W Ferrari
- Clinic of Internal Medicine 1, HSK, Clinic of the City of Wiesbaden and the HELIOS Group, Germany
| | | | - David H Hsi
- Heart & Vascular Institute, Stamford Hospital, Stamford, CT, United States
| | - Gary Tse
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Quanzhong Zhou
- Department of Radiology, The Center for Medical Imaging of Guizhou Province, Affiliated Hospital of Zunyi Medical University, China
| | - Haifeng Liang
- Department of Cardiology, Fu Xing Hospital, Capital Medical University, China
| | - Yuhui Zhang
- Heart Failure Center, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, China.
| | - Jian Zhang
- Heart Failure Center, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, China.
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Sharma M, Davis AP. Adding Fuel to the Fire: Infective Endocarditis and the Challenge of Cerebrovascular Complications. Curr Cardiol Rep 2023; 25:349-356. [PMID: 36971959 DOI: 10.1007/s11886-023-01856-z] [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] [Accepted: 03/09/2023] [Indexed: 05/16/2023]
Abstract
PURPOSE OF REVIEW Infective endocarditis is a deadly disease and made more deadly by neurologic complications. We review the cerebrovascular complications of infective endocarditis and focus our discussion on medical and surgical management. RECENT FINDINGS While management of stroke in the setting of infective endocarditis differs from standard stroke treatment, mechanical thrombectomy has proven safe and successful. Optimal timing of cardiac surgery in the setting of stroke remains an area of debate, but additional observational studies continue to add more detail to the discussion. Cerebrovascular complications in the setting of infective endocarditis remain a high stakes clinical challenge. Timing of cardiac surgery in IE complicated by stroke exemplifies these dilemmas. While more studies have suggested that earlier cardiac surgery is likely safe for those with small ischemic infarcts, there remains a need for more data defining optimal timing of surgery in all forms of cerebrovascular involvement.
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Affiliation(s)
- Malveeka Sharma
- Department of Neurology, Harborview Medical Center, University of Washington, 325 Ninth Avenue, Box 359775, Seattle, WA, 98104-2420, USA
| | - Arielle P Davis
- Department of Neurology, Harborview Medical Center, University of Washington, 325 Ninth Avenue, Box 359775, Seattle, WA, 98104-2420, USA.
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Haliga RE, Sorodoc V, Morarasu BC, Coman AE, Ceasovschih A, Sirbu O, Lionte C, Bologa C, Stoica A, Constantin M, Puha G, Petris OR, Badescu MC, Crisu D, Catana AN, Haliga IB, Sorodoc L. Native and Prosthetic Simultaneously Double Valve Infective Endocarditis with Enterococcus faecalis-Case-Based Review. J Pers Med 2023; 13:jpm13020300. [PMID: 36836534 PMCID: PMC9964386 DOI: 10.3390/jpm13020300] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 02/04/2023] [Accepted: 02/05/2023] [Indexed: 02/11/2023] Open
Abstract
Infective endocarditis is a severe infective heart disease, commonly involving native or prosthetic valves. It frequently presents with univalvular involvement and simultaneous double valve or multivalvular involvement is rarely described. The third leading cause of infective endocarditis worldwide is Enterococcus faecalis, which is associated with high mortality rates despite important advances in antimicrobial therapy. It develops secondary to enterococcal bacteremia, with its origin from the gastrointestinal or genitourinary tract and predominantly affecting the elderly population with multiple comorbidities. Clinical presentation is usually less typical, and the treatment is challenging. It can be marked by antibiotic resistance, side effects, and subsequent complications. Surgical treatment can be considered if deemed appropriate. To the best of our knowledge, we present the first case-based narrative review of Enterococcus faecalis double valve endocarditis involving both the aortic native and prosthetic mitral valve, highlighting the clinical characteristics, treatment, and complications of this condition.
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Affiliation(s)
- Raluca Ecaterina Haliga
- Faculty of Medicine, Department of Internal Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iași, Romania
- 2nd Internal Medicine Clinic, “St. Spiridon” Emergency Clinical County Hospital, 700111 Iași, Romania
| | - Victorita Sorodoc
- Faculty of Medicine, Department of Internal Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iași, Romania
- 2nd Internal Medicine Clinic, “St. Spiridon” Emergency Clinical County Hospital, 700111 Iași, Romania
| | - Bianca Codrina Morarasu
- Faculty of Medicine, Department of Internal Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iași, Romania
- Correspondence: (B.C.M.); (A.E.C.); (A.C.)
| | - Adorata Elena Coman
- Preventive Medicine and Interdisciplinary Team Department, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
- Correspondence: (B.C.M.); (A.E.C.); (A.C.)
| | - Alexandr Ceasovschih
- 2nd Internal Medicine Clinic, “St. Spiridon” Emergency Clinical County Hospital, 700111 Iași, Romania
- Correspondence: (B.C.M.); (A.E.C.); (A.C.)
| | - Oana Sirbu
- Faculty of Medicine, Department of Internal Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iași, Romania
| | - Catalina Lionte
- Faculty of Medicine, Department of Internal Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iași, Romania
- 2nd Internal Medicine Clinic, “St. Spiridon” Emergency Clinical County Hospital, 700111 Iași, Romania
| | - Cristina Bologa
- Faculty of Medicine, Department of Internal Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iași, Romania
- 2nd Internal Medicine Clinic, “St. Spiridon” Emergency Clinical County Hospital, 700111 Iași, Romania
| | - Alexandra Stoica
- Faculty of Medicine, Department of Internal Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iași, Romania
- 2nd Internal Medicine Clinic, “St. Spiridon” Emergency Clinical County Hospital, 700111 Iași, Romania
| | - Mihai Constantin
- Faculty of Medicine, Department of Internal Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iași, Romania
- 2nd Internal Medicine Clinic, “St. Spiridon” Emergency Clinical County Hospital, 700111 Iași, Romania
| | - Gabriela Puha
- Faculty of Medicine, Department of Internal Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iași, Romania
- 2nd Internal Medicine Clinic, “St. Spiridon” Emergency Clinical County Hospital, 700111 Iași, Romania
| | - Ovidiu Rusalim Petris
- 2nd Internal Medicine Clinic, “St. Spiridon” Emergency Clinical County Hospital, 700111 Iași, Romania
- Nursing Department, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Minerva Codruta Badescu
- Faculty of Medicine, Department of Internal Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iași, Romania
- 3rd Internal Medicine Clinic, “St. Spiridon” Emergency Clinical County Hospital, 700111 Iași, Romania
| | - Daniela Crisu
- Department of Cardiology, “St. Spiridon” Emergency Clinical County Hospital, 700111 Iași, Romania
| | - Andreea Nicoleta Catana
- Department of Infectious Diseases, “St. Spiridon” Emergency Clinical County Hospital, 700111 Iași, Romania
| | - Ioana Bianca Haliga
- Faculty of Medicine, Department of Internal Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iași, Romania
| | - Laurentiu Sorodoc
- Faculty of Medicine, Department of Internal Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iași, Romania
- 2nd Internal Medicine Clinic, “St. Spiridon” Emergency Clinical County Hospital, 700111 Iași, Romania
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Rogiers M, Jentjens S, Guler I, Shakoor A, Herregods MC. Value of 18F-FDG pet/CT for prognostic assessment in patients with infective endocarditis. Acta Cardiol 2022; 77:900-909. [PMID: 35172690 DOI: 10.1080/00015385.2022.2040823] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
BACKGROUND 18F-FDG PET/CT is a valuable diagnostic tool in infective endocarditis (IE). However, the prognostic value is unclear. This study aims to evaluate the prognostic performance of 18F-FDG PET/CT in native valve endocarditis (NVE) and prosthetic valve endocarditis (PVE). METHODS We retrospectively included 76 patients treated for definite IE (NVE and PVE) that underwent 18F-FDG PET/CT between January 2016 and December 2018. Clinical, echocardiographic and 18F-FDG PET/CT (pathologic valvular 18F-FDG uptake, extracardiac complications (ECC)) data were collected. The primary endpoint was defined as mortality or recurrence of IE at a one-year follow-up. RESULTS Pathologic valvular 18F-FDG uptake was detected in 32 of 57 (56.1%) patients, 30% (9/30) in NVE and 85.2% (23/27) in PVE group. Atrial fibrillation (OR 3.90, 95% CI = 1.14-16.3), prior anticoagulation treatment (OR 6.37, 95% CI = 1.89-26.7), large vegetation (≥ 10 mm) (OR 4.05, 95% CI = 1.14-16.1), perivalvular complications (OR 7.22, 95% CI = 1.68-55.1) and abscess (OR 10.9, 95% CI = 1.84-283) were associated with positive PET/CT. Extracardiac complications were found in 27 of 76 (35.5%) patients, 42.9% (18/42) in the NVE and 26.5% (9/34) in the PVE group. Pathological valvular tracer uptake (HR 1.20, 95% CI = 0.43-3.37) or extracardiac complications (HR 0.58, 95% CI = 0.21-1.62) were not associated with the occurrence of the primary endpoint. CONCLUSION Our study could not demonstrate a prognostic value of 18F-FDG PET/CT in IE, but confirms high diagnostic performance, which may compromise prognostic significance by accelerated optimal treatment because of earlier diagnostic certainty.
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Affiliation(s)
- Martijn Rogiers
- Department of Cardiology, University Hospitals Leuven, Leuven, Belgium
| | - Sander Jentjens
- Department of Nuclear Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Ipek Guler
- Leuven Biostatistics and Statistical Bioinformatics Centre (L-BioStat), KU Leuven, Leuven, Belgium
| | - Abdul Shakoor
- Department of Internal Medicine, Cardiology, University Hospital Oldenburg, Oldenburg, Germany
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Neurological complications and clinical outcomes of infective endocarditis. J Stroke Cerebrovasc Dis 2022; 31:106626. [DOI: 10.1016/j.jstrokecerebrovasdis.2022.106626] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 06/21/2022] [Accepted: 06/26/2022] [Indexed: 12/13/2022] Open
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Ozdemir YE, Demir AS, Ozdemir MS, Mavi B, Ozen C, Karaosmanoglu HK. A rare case of septic pulmonary embolism in co-existence with infective endocarditis and COVID-19. Future Virol 2022; 0. [PMID: 35873407 PMCID: PMC9302239 DOI: 10.2217/fvl-2022-0029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 07/06/2022] [Indexed: 11/21/2022]
Abstract
Infective endocarditis (IE) symptoms including fever, fatigue, dyspnea and myalgia are similar in COVID-19 findings. Therefore, the diagnosis of IE may be missed in patients with COVID-19. Co-existence with IE in COVID-19 is rarely reported. However, to our knowledge, only one case of septic pulmonary embolism in COVID-19 and IE was reported. Here, we describe a case of septic embolism due to tricuspid endocarditis caused by intravenous drug use in patients with COVID-19. In this fatal case, the use of prophylactic anticoagulants due to COVID-19 probably caused the tendency to hemorrhagic cerebrovascular complications. Our report emphasizes the complexity of anticoagulant prophylaxis in patients with COVID-19 which may cause hypercoagulopathy in co-existence with IE.
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Affiliation(s)
- Yusuf Emre Ozdemir
- Department of Infectious Diseases & Clinical Microbiology, Bakirkoy Dr Sadi Konuk Training Research Hospital, Istanbul, 34140, Turkey
| | - Adile Sevde Demir
- Department of Infectious Diseases & Clinical Microbiology, Bakirkoy Dr Sadi Konuk Training Research Hospital, Istanbul, 34140, Turkey
| | - Meryem Sahin Ozdemir
- Department of Infectious Diseases & Clinical Microbiology, Istanbul University – Cerrahpasa, Cerrahpasa Faculty of Medicine, Istanbul, 34093, Turkey,
| | - Busra Mavi
- Department of Cardiology, Bakirkoy Dr Sadi Konuk Training Research Hospital, Istanbul, 34140, Turkey
| | - Can Ozen
- Department of Cardiovascular Surgery, Bakirkoy Dr Sadi Konuk Training Research Hospital, Istanbul, 34140, Turkey
| | - Hayat Kumbasar Karaosmanoglu
- Department of Infectious Diseases & Clinical Microbiology, Bakirkoy Dr Sadi Konuk Training Research Hospital, Istanbul, 34140, Turkey
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Pisaryuk AS, Zamarashkina VA, Safarova NB, Povalyaev NM, Kotova EO, Babukhina UI, Koltsova EM, Kobalava ZD. Coagulation Disorders in Infective Endocarditis: Role of Pathogens, Biomarkers, Antithrombotic Therapy (Systematic Review). RATIONAL PHARMACOTHERAPY IN CARDIOLOGY 2022. [DOI: 10.20996/1819-6446-2022-06-14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The issue of antithrombotic therapy in patients with infective endocarditis has been studied for over 75 years. During that time studying of pathogenesis of the disease and its embolic complications, lead to the introduction of the concept of “immunothrombosis”. That mechanism allows infective agents (mostly bacteria) to be cloaked from the immune system and to multiply freely, leading to growth of vegetation, thus resulting in higher chance of fragmentation. Small-scale experimental and clinical studies on the correction of hemostatic disorders in infective endocarditis, that were performed in 20th century, didn’t show any significant results, that could affect clinical practice. However, reinterpretation of available data on coagulative system will allow to have elements of hemostasis as an application point in treating infective endocarditis. The article will discuss latest insights on the role of hemostasis system in pathophysisology of infective endocarditis, its effects on the development of the embolic complications, perspectives for diagnostics and treatment.
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Affiliation(s)
- A. S. Pisaryuk
- RUDN University; Moscow City Hospital named after V.V. Vinogradov
| | | | | | | | | | | | - E. M. Koltsova
- Center for Theoretical Problems of Physicochemical Pharmacology; Dmitry Rogachev National Research Center of Pediatric Hematology, Oncology and Immunology
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11
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Béraud G, Tubiana S, Erpelding ML, Le Moing V, Chirouze C, Gorenne I, Manchon P, Tattevin P, Vernet V, Varon E, Hoen B, Duval X. Combined Bacterial Meningitis and Infective Endocarditis: When Should We Search for the Other When Either One is Diagnosed? Infect Dis Ther 2022; 11:1521-1540. [PMID: 35618954 PMCID: PMC9334461 DOI: 10.1007/s40121-022-00651-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 04/22/2022] [Indexed: 11/29/2022] Open
Abstract
Introduction We aimed to describe patients with coexisting infective endocarditis (IE) and bacterial meningitis (BM). Methods We merged two large prospective cohorts, an IE cohort and a BM cohort, with only cases of definite IE and community-acquired meningitis. We compared patients who had IE and BM concurrently to patients with IE only and BM only. Results Among the 1030 included patients, we identified 42 patients with IE–BM (4.1%). Baseline characteristics of patients with IE–BM were mostly similar to those of patients with IE, but meningitis was the predominant presentation at admission (39/42, 92.3%). Causative pathogens were predominantly Streptococcus pneumoniae (18/42, 42.9%) and Staphylococcus aureus (14/42, 33.3%). All pneumococcal IE were associated with BM (18/18). BM due to oral and group D streptococci, Streptococcus agalactiae, and S. aureus were frequently associated with IE (14/30, 46.7%). Three-month mortality was 28.6% in patients with IE–BM, 20.5% in patients with IE, and 16.6% in patients with BM. Conclusions Patients with pneumococcal IE or altered mental status during IE must be investigated for BM. Patients with S. aureus, oral and group D streptococcal or enterococcal BM, or unfavorable outcome in pneumococcal meningitis would benefit from an echocardiography. Patients with the dual infection have the worst prognosis. Their identification is mandatory to initiate appropriate treatment.
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Affiliation(s)
- Guillaume Béraud
- Médecine Interne et Maladies Infectieuses, University Hospital of Poitiers, CHU de Poitiers, 2, rue de la Milétrie, 86021, Poitiers, France.
| | - Sarah Tubiana
- AP-HP, Hôpital Bichat, Centre d'Investigation Clinique, Inserm CIC 1425, 75018, Paris, France.,Université de Paris, IAME, INSERM, 75018, Paris, France
| | - Marie-Line Erpelding
- CHRU-Nancy, INSERM, Université de Lorraine, CIC, Epidémiologie Clinique, 54000, Nancy, France
| | - Vincent Le Moing
- Département de Maladies Infectieuses et Tropicales, CHU de Montpellier, Université de Montpellier, Montpellier, France
| | - Catherine Chirouze
- Maladies infectieuses et tropicals, Centre Hospitalier Régional Universitaire, 25030, Besançon, France.,UMR-CNRS 6249 Chrono-Environnement, Université Bourgogne Franche-Comté, 25000, Besançon, France
| | - Isabelle Gorenne
- AP-HP CHU Xavier Bichat, Département d'Épidémiologie et Recherche Clinique, INSERM CIC-EC 1425, 75018, Paris, France
| | - Pauline Manchon
- AP-HP CHU Xavier Bichat, Département d'Épidémiologie et Recherche Clinique, INSERM CIC-EC 1425, 75018, Paris, France
| | - Pierre Tattevin
- Maladies Infectieuses et Réanimation Médicale, CHU Pontchaillou, Rennes, France
| | | | - Emmanuelle Varon
- National Centre for Pneumococci, Centre Hospitalier Intercommunal Créteil, Créteil, France
| | - Bruno Hoen
- CHU de Nancy, Hôpitaux de Brabois, Service de Maladies Infectieuses et Tropicales, Vandœuvre-lès-Nancy, France
| | - Xavier Duval
- AP-HP, Hôpital Bichat, Centre d'Investigation Clinique, Inserm CIC 1425, 75018, Paris, France.,AP-HP, University Hospital of Bichat, Paris, France.,Inserm UMR-1137 IAME, Paris, France.,Paris Université, UFR de Médecine-Bichat, Paris, France
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12
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Lerche CJ, Schwartz F, Theut M, Fosbøl EL, Iversen K, Bundgaard H, Høiby N, Moser C. Anti-biofilm Approach in Infective Endocarditis Exposes New Treatment Strategies for Improved Outcome. Front Cell Dev Biol 2021; 9:643335. [PMID: 34222225 PMCID: PMC8249808 DOI: 10.3389/fcell.2021.643335] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 05/04/2021] [Indexed: 12/13/2022] Open
Abstract
Infective endocarditis (IE) is a life-threatening infective disease with increasing incidence worldwide. From early on, in the antibiotic era, it was recognized that high-dose and long-term antibiotic therapy was correlated to improved outcome. In addition, for several of the common microbial IE etiologies, the use of combination antibiotic therapy further improves outcome. IE vegetations on affected heart valves from patients and experimental animal models resemble biofilm infections. Besides the recalcitrant nature of IE, the microorganisms often present in an aggregated form, and gradients of bacterial activity in the vegetations can be observed. Even after appropriate antibiotic therapy, such microbial formations can often be identified in surgically removed, infected heart valves. Therefore, persistent or recurrent cases of IE, after apparent initial infection control, can be related to biofilm formation in the heart valve vegetations. On this background, the present review will describe potentially novel non-antibiotic, antimicrobial approaches in IE, with special focus on anti-thrombotic strategies and hyperbaric oxygen therapy targeting the biofilm formation of the infected heart valves caused by Staphylococcus aureus. The format is translational from preclinical models to actual clinical treatment strategies.
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Affiliation(s)
- Christian Johann Lerche
- Department of Clinical Microbiology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Franziska Schwartz
- Department of Clinical Microbiology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Marie Theut
- Department of Clinical Microbiology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Emil Loldrup Fosbøl
- Department of Cardiology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Kasper Iversen
- Department of Cardiology, Herlev and Gentofte Hospital, University of Copenhagen, Herlev, Denmark
- Department of Emergency Medicine, Herlev and Gentofte Hospital, University of Copenhagen, Herlev, Denmark
| | - Henning Bundgaard
- Department of Cardiology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Niels Høiby
- Department of Clinical Microbiology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
- Costerton Biofilm Center, Department of Immunology and Microbiology, University of Copenhagen, Copenhagen, Denmark
| | - Claus Moser
- Department of Clinical Microbiology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
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13
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Bonaros N, Czerny M, Pfausler B, Müller S, Bartel T, Thielmann M, Shehada SE, Folliguet T, Obadia JF, Holfeld J, Lorusso R, Parolari A, Müller L, Grimm M, Ruttmann-Ulmer E. Infective endocarditis and neurologic events: indications and timing for surgical interventions. Eur Heart J Suppl 2020; 22:M19-M25. [PMID: 33664636 PMCID: PMC7916418 DOI: 10.1093/eurheartj/suaa167] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A therapeutic dilemma arises when infective endocarditis (IE) is complicated by a neurologic event. Postponement of surgery up to 4 weeks is recommended by the guidelines, however, this negatively impacts outcomes in many patients with an urgent indication for surgery due to uncontrolled infection, disease progression, or haemodynamic deterioration. The current literature is ambiguous regarding the safety of cardiopulmonary bypass in patients with recent neurologic injury. Nevertheless, most publications demonstrate a lower risk for secondary haemorrhagic conversion of uncomplicated ischaemic lesions than the risk for recurrent embolism under antibiotic treatment. Here, we discuss the current literature regarding neurologic stroke complicating IE with an indication for surgery.
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Affiliation(s)
- Nikolaos Bonaros
- Department of Cardiac Surgery, Medical University of Innsbruck, Anichstrasse 35, A-6020 Innsbruck, Austria
| | - Martin Czerny
- University Heart Center Freiburg-Bad Krozingen, Bad Krozingen, Germany
| | - Bettina Pfausler
- Department of Neurology, Medical University of Innsbruck, Innsbruck, Austria
| | - Silvana Müller
- Department of Internal Medicine III, Medical University of Innsbruck, Innsbruck, Austria
| | - Thomas Bartel
- Department of Cardiology Mediclinic City, Hospital Dubai, Dubai, United Arab Emirates
| | - Matthias Thielmann
- Clinic for Thoracic and Cardiovascular Surgery, West German Heart and Vascular Centre Essen, Essen, Germany
| | - Sharaf-Eldin Shehada
- Clinic for Thoracic and Cardiovascular Surgery, West German Heart and Vascular Centre Essen, Essen, Germany
| | - Thierry Folliguet
- Department of Cardiac Surgery and Transplantation, Henry Mondor Hospital, Paris, France
| | - Jean-Francois Obadia
- Department of Cardiac Surgery and Transplantation, Louis Pradel Hospital, Lyon, France
| | - Johannes Holfeld
- Department of Cardiac Surgery, Medical University of Innsbruck, Anichstrasse 35, A-6020 Innsbruck, Austria
| | - Roberto Lorusso
- Department of Cardiothoracic Surgery, Maastricht University Medical Centre, Maaastricht, The Netherlands
| | | | - Ludwig Müller
- Department of Cardiac Surgery, Medical University of Innsbruck, Anichstrasse 35, A-6020 Innsbruck, Austria
| | - Michael Grimm
- Department of Cardiac Surgery, Medical University of Innsbruck, Anichstrasse 35, A-6020 Innsbruck, Austria
| | - Elfriede Ruttmann-Ulmer
- Department of Cardiac Surgery, Medical University of Innsbruck, Anichstrasse 35, A-6020 Innsbruck, Austria
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14
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Diab M, Musleh R, Lehmann T, Sponholz C, Pletz MW, Franz M, Schulze PC, Witte OW, Kirchhof K, Doenst T, Günther A. Risk of postoperative neurological exacerbation in patients with infective endocarditis and intracranial haemorrhage. Eur J Cardiothorac Surg 2020; 59:ezaa347. [PMID: 33036027 DOI: 10.1093/ejcts/ezaa347] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 07/28/2020] [Accepted: 07/29/2020] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES Cardiac surgery in patients with infective endocarditis (IE) and preoperative intracranial haemorrhage (pre-ICH) is a highly debatable issue, and guidelines are still not well defined. The goal of this study was to investigate the effect of cardiac surgery and its timing on the clinical outcomes of patients with IE and pre-ICH. METHODS We did a single-centre retrospective analysis of data from patients with preoperative brain imaging who had surgery for left-sided IE between January 2007 and May 2018. RESULTS Among the 363 patients included in the study, 34 had pre-ICH. Hospital mortality was similar between the patients with and without pre-ICH (29% vs 27%, respectively; P = 0.84). Unadjusted, postoperative neurological deterioration appeared higher in patients with pre-ICH (24% vs 17%; P = 0.35). In multivariable analysis, pre-ICH did not qualify as an independent predictor for either postoperative neurological deterioration [odds ratio 1.10, 95% confidence interval (CI) 0.44-2.73; P = 0.84] or hospital mortality (odds ratio 1.02, 95% CI 0.43-2.40; P = 0.96). Postoperative partial thromboplastin time was significantly elevated in 4 patients with relevant post-ICH compared with those patients without relevant post-ICH (65.5 vs 37.6, respectively; P = 0.004). CONCLUSIONS Pre-ICH was not an independent predictor for postoperative neurological deterioration or hospital mortality in patients with IE. Postoperative coagulation management seems to be crucial in patients with IE with ICH. Although this is to date the largest monocentric study addressing surgical decision and timing, the number of patients with pre-ICH was low. Therefore, these conclusions should be regarded with caution; randomized clinical trials are needed.
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Affiliation(s)
- Mahmoud Diab
- Department of Cardiothoracic Surgery, Jena University Hospital, Jena, Germany
| | - Rita Musleh
- Department of Cardiothoracic Surgery, Jena University Hospital, Jena, Germany
- Department of Neurology, Jena University Hospital, Jena, Germany
| | - Thomas Lehmann
- Institute of Medical Statistics, Computer and Data Sciences, Jena University Hospital, Jena, Germany
| | - Christoph Sponholz
- Department of Anesthesiology and Intensive Care Medicine, Jena University Hospital, Jena, Germany
| | - Mathias W Pletz
- Institute for Infectious Diseases and Infection Control, Jena University Hospital, Jena, Germany
| | - Marcus Franz
- Division of Cardiology, Department of Internal Medicine I, Jena University Hospital, Jena, Germany
| | - P Christian Schulze
- Division of Cardiology, Department of Internal Medicine I, Jena University Hospital, Jena, Germany
| | - Otto W Witte
- Department of Neurology, Jena University Hospital, Jena, Germany
| | - Klaus Kirchhof
- Division of Neuroradiology, Department of Radiology, Jena University Hospital, Jena, Germany
| | - Torsten Doenst
- Department of Cardiothoracic Surgery, Jena University Hospital, Jena, Germany
| | - Albrecht Günther
- Department of Neurology, Jena University Hospital, Jena, Germany
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15
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Liesenborghs L, Meyers S, Vanassche T, Verhamme P. Coagulation: At the heart of infective endocarditis. J Thromb Haemost 2020; 18:995-1008. [PMID: 31925863 DOI: 10.1111/jth.14736] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Accepted: 01/02/2020] [Indexed: 12/11/2022]
Abstract
Infective endocarditis is a life-threatening and enigmatic disease with a mortality of 30% and a pathophysiology that is poorly understood. However, at its core, an endocarditis lesion is mainly a fibrin and platelet blood clot infested with bacteria, clinging at the cardiac valves. Infective endocarditis therefore serves as a paradigm of immunothrombosis gone wrong. Immunothrombosis refers to the entanglement of the coagulation system with innate immunity and the role of coagulation in the isolation and clearance of invading pathogens. However, in the case of infective endocarditis, instead of containing the infection, immunothrombosis inadvertently creates the optimal shelter from the immune system and allows some bacteria to grow almost unimpeded. In every step of the disease, the coagulation system is heavily involved. It mediates the initial adhesion of bacteria to the leaflets, fuels the growth and maturation of a vegetation, and facilitates complications such as embolization and valve destruction. In addition, the number one cause of infective endocarditis, Staphylococcus aureus, has proven to be a true manipulator of immunothrombosis and thrives in the fibrin rich environment of an endocarditis vegetation. Considering its central role in infective endocarditis, the coagulation system is an attractive therapeutic target for this deadly disease. There is, however, a very delicate balance at play and the use of antithrombotic drugs in patients with endocarditis is often accompanied with a high bleeding risk.
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Affiliation(s)
- Laurens Liesenborghs
- Department of Cardiovascular Sciences, Center for Molecular and Vascular Biology, University of Leuven, Leuven, Belgium
| | - Severien Meyers
- Department of Cardiovascular Sciences, Center for Molecular and Vascular Biology, University of Leuven, Leuven, Belgium
| | - Thomas Vanassche
- Department of Cardiovascular Sciences, Center for Molecular and Vascular Biology, University of Leuven, Leuven, Belgium
| | - Peter Verhamme
- Department of Cardiovascular Sciences, Center for Molecular and Vascular Biology, University of Leuven, Leuven, Belgium
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16
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Kadam M, Birns J, Bhalla A. The management of infective endocarditis complicated by stroke. Int J Clin Pract 2020; 74:e13469. [PMID: 31877574 DOI: 10.1111/ijcp.13469] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 11/21/2019] [Accepted: 12/22/2019] [Indexed: 12/18/2022] Open
Affiliation(s)
- Mustafa Kadam
- Department of Aging and Health, Guy's and St Thomas' Hospital NHS Foundation Trust, London, UK
| | - Jonathan Birns
- Department of Aging and Health, Guy's and St Thomas' Hospital NHS Foundation Trust, London, UK
| | - Ajay Bhalla
- Department of Aging and Health, Guy's and St Thomas' Hospital NHS Foundation Trust, London, UK
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17
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Klein CF, Gørtz S, Wohlfahrt J, Nørgaard Munch T, Melbye M, Bundgaard H, Iversen KK. Increased Risk of Ischemic Stroke After Treatment of Infective Endocarditis: A Danish, Nationwide, Propensity Score-Matched Cohort Study. Clin Infect Dis 2020; 70:1186-1192. [PMID: 31198927 DOI: 10.1093/cid/ciz320] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Accepted: 04/23/2019] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Several studies have reported a high risk of ischemic stroke (IS) during the acute phase of infective endocarditis (IE). The long-term risk of IS after IE, however, is not fully illuminated. METHODS This Danish, nationwide, register-based, propensity score-matched cohort study used Cox regression to estimate hazard ratios (HRs) of IS for persons with vs without a history of left-sided IE, from 1977 to 2015. RESULTS We followed 9312 patients exposed to a first-time IE and 91 996 nonexposed, matched control persons. Compared to persons without IE, patients with a history of IE had a significantly increased risk of IS; the risk was highest during the first 4 weeks after IE diagnosis (HR 57.20, 95% confidence interval [CI] 45.58-71.78; P < .0001) and a moderately elevated risk persisted until 2 years after IE (4 weeks to 3 months after IE, HR 5.40, 95% CI 4.11-7.19; 3 months to 2 years after IE, HR 1.73, 95% CI 1.48-2.01). Mediation analyses showed that the higher risk of IS the first 2 years after IE could not be explained by atrial fibrillation (AF) or inserted mechanical valves in IE patients. In the period from 4 weeks to 3 months after IE diagnosis, patients treated with anticoagulative therapy had a lower risk of IS (HR 0.30, 95% CI .10-0.96; P = .04). CONCLUSIONS Patients with a history of IE had an increased risk of IS for up to 2 years after IE diagnosis. The increased risk was unrelated to AF and inserted mechanical valves. During the initial phase after IE, patients taking an anticoagulative medication had a lower risk of IS.
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Affiliation(s)
| | - Sanne Gørtz
- Department of Epidemiology Research, Statens Serum Institut, Denmark
| | - Jan Wohlfahrt
- Department of Epidemiology Research, Statens Serum Institut, Denmark
| | - Tina Nørgaard Munch
- Department of Epidemiology Research, Statens Serum Institut, Denmark.,Department of Neurosurgery, Copenhagen University Hospital Rigshospitalet, Denmark
| | - Mads Melbye
- Department of Epidemiology Research, Statens Serum Institut, Denmark.,Department of Clinical Medicine, University of Copenhagen, Denmark.,Department of Medicine, Stanford University School of Medicine, California
| | - Henning Bundgaard
- Department of Cardiology, Copenhagen University Hospital Rigshospitalet, Denmark
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18
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Davis KA, Huang G, Petty SA, Tan WA, Malaver D, Peacock JE. The Effect of Preexisting Anticoagulation on Cerebrovascular Events in Left-Sided Infective Endocarditis. Am J Med 2020; 133:360-369. [PMID: 31494108 DOI: 10.1016/j.amjmed.2019.07.059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 07/09/2019] [Accepted: 07/16/2019] [Indexed: 12/17/2022]
Abstract
BACKGROUND Stroke is a frequent complication of infective endocarditis, especially infection involving left-sided valves. Management of anticoagulation in left-sided infective endocarditis is controversial as it is unclear whether anticoagulation impacts stroke and bleeding risk in patients with this condition. The objective of this study was to evaluate the effect of anticoagulation on stroke occurrence and bleeding complications in patients with left-sided infective endocarditis. METHODS Patients admitted to a tertiary academic hospital with left-sided infective endocarditis between December 2011 and April 2018 were identified. Patients were stratified based on receipt of therapeutic anticoagulation prior to admission. The primary outcome measure was the rate of radiographically confirmed stroke at 10 weeks. RESULTS Two-hundred and fifty-eight consecutive patients with left-sided infective endocarditis were identified. Patients receiving anticoagulation (n = 50) were older (median age 63 vs 52; P = .02), were more likely to have a history of atrial fibrillation (22% vs 8.2%; P < .01), more often had prosthetic valves (38% vs 13.9%; P < .01), and had a lower incidence of mitral valve involvement (40% vs 62%; P < .01), compared with patients not receiving anticoagulation. There was no significant difference in the rate of stroke, cerebrovascular hemorrhage, or mortality at 10 weeks between the two cohorts. CONCLUSIONS Preexisting anticoagulation did not appear to have an effect on stroke, cerebrovascular hemorrhage, or mortality in patients with left-sided infective endocarditis at 10 weeks. Continuation of anticoagulation in patients with a definitive preexisting indication should be considered in patients with left-sided infective endocarditis in the absence of other contraindications.
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Affiliation(s)
- Kyle A Davis
- Department of Pharmacy, Wake Forest Baptist Medical Center, Winston-Salem, NC.
| | - Glen Huang
- Department of Internal Medicine, Wake Forest Baptist Health, Winston-Salem, NC
| | - S Allan Petty
- Department of Internal Medicine, Wake Forest Baptist Health, Winston-Salem, NC
| | - Walter A Tan
- Department of Internal Medicine, Wake Forest Baptist Health, Winston-Salem, NC; Department of Internal Medicine, Section on Cardiology, Wake Forest Baptist Health, Winston-Salem, NC
| | - Diego Malaver
- Department of Internal Medicine, Wake Forest Baptist Health, Winston-Salem, NC; Department of Internal Medicine, Section on Cardiology, Wake Forest Baptist Health, Winston-Salem, NC
| | - James E Peacock
- Department of Internal Medicine, Wake Forest Baptist Health, Winston-Salem, NC; Department of Internal Medicine, Section on Infectious Diseases, Wake Forest Baptist Health, Winston-Salem, NC
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19
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Østergaard L, Andersson NW, Kristensen SL, Dahl A, Bundgaard H, Iversen K, Eske-Bruun N, Gislason G, Torp-Pedersen C, Valeur N, Køber L, Fosbøl EL. Risk of stroke subsequent to infective endocarditis: A nationwide study. Am Heart J 2019; 212:144-151. [PMID: 31004917 DOI: 10.1016/j.ahj.2019.03.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 03/21/2019] [Indexed: 02/06/2023]
Abstract
BACKGROUND The aim of the study was to investigate the associated risk of stroke after discharge of infective endocarditis (IE) in patients with stroke during IE admission compared with patients without stroke during IE admission. METHODS Using Danish nationwide registries, we identified nonsurgically treated patients with IE discharged alive in the period from 1996 to 2016. The study population was grouped into (1) patients with stroke during IE admission and (2) patients without stroke during IE admission. Multivariable adjusted Cox proportional-hazard analysis was used to compare the associated risk of stroke between groups. RESULTS We identified 4,284 patients with IE, of whom 239 (5.6%) had a stroke during IE admission. We identified differentials in the associated risk of stroke during follow-up between groups (P = .006 for interaction with time). The associated risk of stroke was higher in patients with stroke during IE admission with a 1-year follow-up, HR = 3.21 (95% CI 1.66-6.20), compared with patients without stroke during IE admission. From 1 to 5 years of follow-up, we identified no difference in the associated risk of stroke between groups, HR = 0.91 (95% CI 0.33-2.50). CONCLUSIONS Patients with nonsurgically treated IE with a stroke during IE admission were at significant higher associated risk of subsequent stroke within the first year of follow-up as compared with patients without a stroke during IE admission. This risk difference was not evident beyond 1 year of discharge. These findings underline the need for identification of causes and mechanisms of recurrent strokes after IE to develop preventive means.
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Affiliation(s)
| | | | | | - Anders Dahl
- Department of Cardiology, Copenhagen University Hospital Herlev and Gentofte, Copenhagen, Denmark; Department of Cardiology, Bispebjerg Hospital, Copenhagen, Denmark
| | | | - Kasper Iversen
- Department of Cardiology, Copenhagen University Hospital Herlev and Gentofte, Copenhagen, Denmark
| | - Niels Eske-Bruun
- Clinical Institute, University of Aalborg, Aalborg, Denmark; Department of Cardiology, Zealand University Hospital, Roskilde, Denmark; Clinical Institute, Copenhagen University, Copenhagen, Denmark
| | - Gunnar Gislason
- Department of Cardiology, Copenhagen University Hospital Herlev and Gentofte, Copenhagen, Denmark; The Danish Heart Foundation, Copenhagen, Denmark
| | - Christian Torp-Pedersen
- Department of Clinical Epidemiology and Department of Cardiology, University of Aalborg, Aalborg, Denmark; Clinical Institute, University of Aalborg, Aalborg, Denmark
| | - Nana Valeur
- Department of Cardiology, Bispebjerg Hospital, Copenhagen, Denmark
| | - Lars Køber
- The Heart Centre, Rigshospitalet, Copenhagen, Denmark
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20
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Long B, Koyfman A. Infectious endocarditis: An update for emergency clinicians. Am J Emerg Med 2018; 36:1686-1692. [PMID: 30001813 DOI: 10.1016/j.ajem.2018.06.074] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 06/30/2018] [Indexed: 01/18/2023] Open
Abstract
INTRODUCTION Infectious endocarditis (IE) is a potentially deadly disease without therapy and can cause a wide number of findings and symptoms, often resembling a flu-like illness, which makes diagnosis difficult. OBJECTIVE This narrative review evaluates the presentation, evaluation, and management of infective endocarditis in the emergency department, based on the most current literature. DISCUSSION IE is due to infection of the endocardial surface, most commonly cardiac valves. Major risk factors include prior endocarditis (the most common risk factor), structural heart damage, IV drug use (IVDU), poor immune function (vasculitis, HIV, diabetes, malignancy), nosocomial (surgical hardware placement, poor surgical technique, hematoma development), and poor oral hygiene, and a wide variety of organisms can cause IE. Patients typically present with flu-like illness. Though fever and murmur occur in the majority of cases, they may not be present at the time of initial presentation. Other findings such as Roth spots, Janeway lesions, Osler nodes, etc. are not common. An important component is consideration of risk factors. A patient with IVDU (past or current use) and fever should trigger consideration of IE. Other keys are multiple sites of infection, poor dentition, and abnormal culture results with atypical organisms. If endocarditis is likely based on history and examination, admission for further evaluation is recommended. Blood cultures and echocardiogram are key diagnostic tests. CONCLUSIONS Emergency physicians should consider IE in the patient with flu-like symptoms and risk factors. Appropriate evaluation and management can significantly reduce disease morbidity and mortality.
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Affiliation(s)
- Brit Long
- Brooke Army Medical Center, Department of Emergency Medicine, 3841 Roger Brooke Dr, Fort Sam Houston, TX 78234, United States.
| | - Alex Koyfman
- The University of Texas Southwestern Medical Center, Department of Emergency Medicine, 5323 Harry Hines Boulevard, Dallas, TX 75390, United States
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21
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Abstract
Infective endocarditis (IE) is a rare, life-threatening disease that has long-lasting effects even among patients who survive and are cured. IE disproportionately affects those with underlying structural heart disease and is increasingly associated with health care contact, particularly in patients who have intravascular prosthetic material. In the setting of bacteraemia with a pathogenic organism, an infected vegetation may form as the end result of complex interactions between invading microorganisms and the host immune system. Once established, IE can involve almost any organ system in the body. The diagnosis of IE may be difficult to establish and a strategy that combines clinical, microbiological and echocardiography results has been codified in the modified Duke criteria. In cases of blood culture-negative IE, the diagnosis may be especially challenging, and novel microbiological and imaging techniques have been developed to establish its presence. Once diagnosed, IE is best managed by a multidisciplinary team with expertise in infectious diseases, cardiology and cardiac surgery. Antibiotic prophylaxis for the prevention of IE remains controversial. Efforts to develop a vaccine that targets common bacterial causes of IE are ongoing, but have not yet yielded a commercially available product.
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Affiliation(s)
- Thomas L Holland
- Department of Medicine, Division of Infectious Diseases, Duke University Medical Center, Room 185 Hanes Building, 315 Trent Drive, Durham, North Carolina 27710, USA
- Duke Clinical Research Institute, Duke University Medical Center, Durham, North Carolina, USA
| | - Larry M Baddour
- Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Arnold S Bayer
- Department of Medicine, David Geffen School of Medicine at UCLA, Torrance, California, USA
| | - Bruno Hoen
- Department of Infectious Diseases, University Hospital of Pointe-Pitre, Pointe-Pitre, France
| | - Jose M Miro
- Infectious Diseases Service, Hospital Clinic - IDIBAPS, University of Barcelona, Barcelona, Spain
| | - Vance G Fowler
- Department of Medicine, Division of Infectious Diseases, Duke University Medical Center, Room 185 Hanes Building, 315 Trent Drive, Durham, North Carolina 27710, USA
- Duke Clinical Research Institute, Duke University Medical Center, Durham, North Carolina, USA
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22
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Preston AH, Williams S, Archer J. A review of the role of anticoagulation for patients with infective endocarditis and embolic stroke. Clin Case Rep 2016; 4:513-6. [PMID: 27190618 PMCID: PMC4856248 DOI: 10.1002/ccr3.556] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 02/02/2016] [Accepted: 03/14/2016] [Indexed: 11/25/2022] Open
Abstract
Stroke is a common embolic complication of infective endocarditis. The most important treatment to prevent stroke in endocarditis is the initiation of antibiotic therapy. It is unclear whether the initiation of de novo anticoagulation (i.e, warfarin) in patients with infective endocarditis is beneficial, since there are no large or randomized controlled trials in this area. However, this case report suggests, despite the limited evidence, that anticoagulation in this patient caused no harm and could suggest a hint of possible benefit.
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Affiliation(s)
| | - Stefan Williams
- Pinderfields General Hospital Aberford Road Wakefield WF1 4DG UK; Leeds General Infirmary Great George Street LS1 3EX UK
| | - Judy Archer
- Pinderfields General Hospital Aberford Road Wakefield WF1 4DG UK
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23
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Habib G, Lancellotti P, Antunes MJ, Bongiorni MG, Casalta JP, Del Zotti F, Dulgheru R, El Khoury G, Erba PA, Iung B, Miro JM, Mulder BJ, Plonska-Gosciniak E, Price S, Roos-Hesselink J, Snygg-Martin U, Thuny F, Tornos Mas P, Vilacosta I, Zamorano JL. 2015 ESC Guidelines for the management of infective endocarditis: The Task Force for the Management of Infective Endocarditis of the European Society of Cardiology (ESC). Endorsed by: European Association for Cardio-Thoracic Surgery (EACTS), the European Association of Nuclear Medicine (EANM). Eur Heart J 2015; 36:3075-3128. [PMID: 26320109 DOI: 10.1093/eurheartj/ehv319] [Citation(s) in RCA: 3143] [Impact Index Per Article: 349.2] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
MESH Headings
- Acute Kidney Injury/diagnosis
- Acute Kidney Injury/therapy
- Ambulatory Care
- Aneurysm, Infected/diagnosis
- Aneurysm, Infected/therapy
- Anti-Bacterial Agents/therapeutic use
- Antibiotic Prophylaxis
- Arrhythmias, Cardiac/diagnosis
- Arrhythmias, Cardiac/therapy
- Clinical Laboratory Techniques
- Critical Care
- Cross Infection/etiology
- Dentistry, Operative
- Diagnostic Imaging/methods
- Embolism/diagnosis
- Embolism/therapy
- Endocarditis/diagnosis
- Endocarditis/therapy
- Endocarditis, Non-Infective/diagnosis
- Endocarditis, Non-Infective/therapy
- Female
- Fibrinolytic Agents/therapeutic use
- Heart Defects, Congenital
- Heart Failure/diagnosis
- Heart Failure/therapy
- Heart Valve Diseases/diagnosis
- Heart Valve Diseases/therapy
- Humans
- Long-Term Care
- Microbiological Techniques
- Musculoskeletal Diseases/diagnosis
- Musculoskeletal Diseases/microbiology
- Musculoskeletal Diseases/therapy
- Myocarditis/diagnosis
- Myocarditis/therapy
- Neoplasms/complications
- Nervous System Diseases/diagnosis
- Nervous System Diseases/microbiology
- Nervous System Diseases/therapy
- Patient Care Team
- Pericarditis/diagnosis
- Pericarditis/therapy
- Postoperative Complications/etiology
- Postoperative Complications/prevention & control
- Pregnancy
- Pregnancy Complications, Cardiovascular/diagnosis
- Pregnancy Complications, Cardiovascular/therapy
- Prognosis
- Prosthesis-Related Infections/diagnosis
- Prosthesis-Related Infections/therapy
- Recurrence
- Risk Assessment
- Risk Factors
- Splenic Diseases/diagnosis
- Splenic Diseases/therapy
- Thoracic Surgical Procedures
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24
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Klein M, Wang A. Infective Endocarditis. J Intensive Care Med 2014; 31:151-63. [PMID: 25320158 DOI: 10.1177/0885066614554906] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 08/21/2014] [Indexed: 11/16/2022]
Abstract
Infective endocarditis (IE) is a noncontagious infection of the endocardium and heart valves. The epidemiology of IE has shifted recently with an increase in health care-associated IE. Infective endocarditis requiring intensive care unit stay is increasing, and nosocomial IE is frequently responsible. Diagnosis of IE requires multiple clinical data points encompassing history and physical examination, microbiology, and cardiac imaging as no one test is sufficiently sensitive or specific. The modified Duke criteria algorithm is the standard of care in the clinical diagnosis of IE. Complications from IE are common, particularly so in the critical care setting, and include congestive heart failure, embolism, septic shock, invasive infection, prosthetic valve dehiscence, heart block, and mycotic aneurysm. A multidisciplinary care team of infectious disease, cardiology, and cardiac surgery physicians is recommended to reduce complications. Intravenous antibiotics are first-line therapy with cardiac surgery being reserved for certain complications of IE and/or for clinical situations in which there is a high risk of complications. Timing of surgery for IE remains controversial and depends on a variety of clinical factors.
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Affiliation(s)
- Michael Klein
- Division of Cardiology, Department of Medicine, Duke University Medical Center, Durham, NC, USA
| | - Andrew Wang
- Division of Cardiology, Department of Medicine, Duke University Medical Center, Durham, NC, USA
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25
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Usefulness of anticoagulant therapy in the prevention of embolic complications in patients with acute infective endocarditis. BIOMED RESEARCH INTERNATIONAL 2014; 2014:254187. [PMID: 25110667 PMCID: PMC4119712 DOI: 10.1155/2014/254187] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Revised: 06/25/2014] [Accepted: 06/25/2014] [Indexed: 12/27/2022]
Abstract
Background. The use of anticoagulant therapy (ACT) in patients with acute infective endocarditis (IE) remains a controversial issue. Our study attempts to estimate the impact of ACT on the occurrence of embolic complications and the usefulness of ACT in the prevention of embolism in IE patients. Methods. The present authors analyzed 150 patients with left-sided IE. Embolisms including cerebrovascular events (CVE) and the use of ACT were checked at the time of admission and during hospitalization. Results. 57 patients (38.0%) experienced an embolic event. There was no significant difference in the incidence of CVE and in-hospital mortality between patients with and without warfarin use at admission, although warfarin-naïve patients were significantly more likely to have large (>1 cm) and mobile vegetation. In addition, there was no significant difference in the incidence of postadmission embolism and in-hospital death between patients with and without in-hospital ACT. On multivariate logistic regression analysis, ACT at admission was not significantly associated with a lower risk of embolism in patients with IE. Conclusions. The role of ACT in the prevention of embolism was limited in IE patients undergoing antibiotic therapy, although it seems to reduce the embolic potential of septic vegetation before treatment.
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26
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Vanassche T, Peetermans WE, Herregods MC, Herijgers P, Verhamme P. Anti-thrombotic therapy in infective endocarditis. Expert Rev Cardiovasc Ther 2012; 9:1203-19. [PMID: 21932963 DOI: 10.1586/erc.11.100] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Despite advances in medical and surgical treatment, infective endocarditis (IE) still carries a high risk of morbidity and mortality. One of the determinants of an adverse outcome is the presence of systemic embolization and in particular, of CNS embolization. IE vegetations consist of bacteria, platelets and inflammatory cells in a fibrin mesh. The interactions between pathogens, platelets and the coagulation system are critical to vegetation initiation and growth. This understanding has led to the study of the effect of anti-thrombotic treatment on IE vegetation formation and embolization. Although it has been demonstrated that antiplatelet and anticoagulant strategies have an impact on in vitro and animal models of IE, results from the available clinical studies are conflicting. In this article, we provide an overview of the available experimental and clinical data on anti-thrombotic treatment in IE and summarize the current guidelines. An early diagnosis, prompt empiric antibiotic treatment and a careful selection of patients who benefit from early surgical intervention remain essential in the prevention of embolic complications. In patients who have other indications for antiplatelet or anticoagulant treatment, the continuation of this treatment is deemed safe in the absence of hemorrhagic complications.
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Affiliation(s)
- Thomas Vanassche
- Center for Molecular and Vascular Biology, University of Leuven, Leuven, Belgium.
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27
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Bacterial endocarditis in haemodialysis patients. Is frequent heparinisation protecting embolisation? Eur J Clin Microbiol Infect Dis 2011; 30:1627-8. [PMID: 21503839 DOI: 10.1007/s10096-011-1252-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2011] [Accepted: 03/26/2011] [Indexed: 10/18/2022]
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