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Guo C, Jiang Z, He J, Ma H, Wang Y, Tan J, Ou Q, Tian Y, Tian L, Liu Q, Huang J, Yang L. Impact of left atrial appendage thrombus location on diagnostic accuracy of cardiac CT: a single-centre case-control study. BMJ Open 2024; 14:e079876. [PMID: 38296275 PMCID: PMC10831467 DOI: 10.1136/bmjopen-2023-079876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 01/15/2024] [Indexed: 02/03/2024] Open
Abstract
OBJECTIVE Cardiac CT (CCT) is an emerging non-invasive modality for assessing left atrial appendage (LAA) thrombus, but the results were conflicting. Our study aims to evaluate the accuracy of CCT for detecting LAA thrombus in patients undergoing catheter ablation of atrial fibrillation, using trans-oesophageal echocardiography (TEE) as the reference standard. DESIGN Case-control study. SETTING Patient data were collected from a tertiary hospital in China between 2017 and 2022. PARTICIPANTS The study enrolled 726 patients (male: 60.2%, age: 61±11 years) who had both TEE and CCT before catheter ablation of atrial fibrillation. MEASURES The CCT protocol consisted of one angiographic phase and one delayed scan 30 s later. LAA thrombi were defined as solid masses on TEE or persistent defects on CCT. The thrombus dimension and location, the LAA filling and emptying flow velocity were assessed by TEE. RESULTS Of the 57 (7.9%) patients with LAA thrombi identified by TEE, 29 (50.9%) were located at the LAA ostium, and 28 (49.1%) were in the LAA. The former showed higher motility following blood flow and heartbeats than the latter. The CCT detected 14 (48.3%) of the LAA-ostium thrombi but 25 (89.3%) of those in the LAA (p=0.001). The LAA-ostium thrombi with the LAA mean flow velocity >0.35 m/s and maximum diameters <10 mm were more prone to have CCT false-negative results. CONCLUSION For patients undergoing catheter ablation for atrial fibrillation, CCT with a 30 s delay scan is less sensitive to LAA thrombi than TEE, especially for LAA-ostium thrombi with smaller sizes and higher LAA flow velocity.
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Affiliation(s)
- Chuxian Guo
- Cardiology Department, Guizhou Provincial People's Hospital, Guiyang, Guizhou, China
- Guizhou Medical University, Guiyang, Guizhou, China
| | - Zhi Jiang
- Cardiology Department, Guizhou Provincial People's Hospital, Guiyang, Guizhou, China
| | - Jionghong He
- Cardiology Department, Guizhou Provincial People's Hospital, Guiyang, Guizhou, China
- Echocardiography Department, Guizhou Provincial People's Hospital, Guiyang, Guizhou, China
| | - Haiyan Ma
- Radiology Department, Guizhou Provincial People's Hospital, Guiyang, Guizhou, China
| | - Yuquan Wang
- Radiology Department, Guizhou Provincial People's Hospital, Guiyang, Guizhou, China
| | - Jing Tan
- Cardiology Department, Guizhou Provincial People's Hospital, Guiyang, Guizhou, China
- Echocardiography Department, Guizhou Provincial People's Hospital, Guiyang, Guizhou, China
| | - Qiaoqiao Ou
- Cardiology Department, Guizhou Provincial People's Hospital, Guiyang, Guizhou, China
- Guizhou Medical University, Guiyang, Guizhou, China
| | - Ye Tian
- Cardiology Department, Guizhou Provincial People's Hospital, Guiyang, Guizhou, China
| | - Longhai Tian
- Cardiology Department, Guizhou Provincial People's Hospital, Guiyang, Guizhou, China
| | - Qifang Liu
- Cardiology Department, Guizhou Provincial People's Hospital, Guiyang, Guizhou, China
| | - Jing Huang
- Cardiology Department, Guizhou Provincial People's Hospital, Guiyang, Guizhou, China
| | - Long Yang
- Cardiology Department, Guizhou Provincial People's Hospital, Guiyang, Guizhou, China
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Li W, Liu M, Yu F, Zhu W, Yu X, Guo X, Yang Q. Detection of left atrial appendage thrombus by dual-energy computed tomography-derived imaging biomarkers in patients with atrial fibrillation. Front Cardiovasc Med 2022; 9:809688. [PMID: 35935656 PMCID: PMC9354661 DOI: 10.3389/fcvm.2022.809688] [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: 11/05/2021] [Accepted: 06/29/2022] [Indexed: 11/22/2022] Open
Abstract
Aims This study aimed to assess the diagnostic performances of dual-energy computed tomography (CT)-derived iodine concentration and effective atomic number (Zeff) in early-phase cardiac CT in detecting left atrial appendage (LAA) thrombus and differentiating thrombus from spontaneous echo contrast (SEC) in patients with atrial fibrillation using transesophageal echocardiography (TEE) as the reference standard. Methods and results A total of 389 patients with atrial fibrillation were prospectively recruited. All patients underwent a single-phase cardiac dual-energy CT scan using a third-generation dual-source CT. The iodine concentration, Zeff, and conventional Hounsfield units (HU) in the LAA were measured and normalized to the ascending aorta (AA) of the same slice to calculate the LAA/AA ratio. Of the 389 patients, TEE showed thrombus in 15 (3.9%), SEC in 33 (8.5%), and no abnormality in 341 (87.7%) patients. Using TEE findings as the reference standard, the respective sensitivity, specificity, positive predictive value, and negative predictive value of the LAA/AA HU ratio for detecting LAA thrombus were 100.0, 96.8, 55.6, and 100.0%; those of the LAA/AA iodine concentration ratio were 100.0, 99.2, 83.3, and 100.0%; and those of the LAA/AA Zeff ratio were 100.0, 98.9, 79.0, and 100.0%. The areas under the receiver operator characteristic curve (AUC) of the LAA/AA iodine concentration ratio (0.978; 95% CI 0.945–1.000) and Zeff ratio (0.962; 95% CI 0.913–1.000) were significantly larger than that of the LAA/AA HU ratio (0.828; 95% CI 0.714–0.942) in differentiating the thrombus from the SEC (both P < 0.05). Although the AUC of the LAA/AA iodine concentration ratio was larger than that of the LAA/AA Zeff ratio, no significant difference was found between them (P = 0.259). Conclusion The dual-energy CT-derived iodine concentration and the Zeff showed better diagnostic performance than the conventional HU in early-phase cardiac CT in detecting LAA thrombus and differentiating the thrombus from the circulatory stasis. However, these results need to be validated in large-cohort studies with late-phase images.
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Affiliation(s)
- Wenhuan Li
- Department of Radiology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Mingxi Liu
- Department of Radiology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Fangfang Yu
- Department of Radiology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Weiwei Zhu
- Department of Echocardiography, Heart Center, Capital Medical University, Beijing, China
| | - Xianbo Yu
- CT Collaboration, Siemens Healthineers Ltd., Beijing, China
| | - Xiaojuan Guo
- Department of Radiology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
- Xiaojuan Guo,
| | - Qi Yang
- Department of Radiology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
- *Correspondence: Qi Yang,
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Computed tomography measurement for left atrial appendage closure. Cardiovasc Interv Ther 2022; 37:440-449. [DOI: 10.1007/s12928-022-00852-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 03/07/2022] [Indexed: 11/02/2022]
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Yu S, Zhang H, Li H. Cardiac Computed Tomography Versus Transesophageal Echocardiography for the Detection of Left Atrial Appendage Thrombus: A Systemic Review and Meta-Analysis. J Am Heart Assoc 2021; 10:e022505. [PMID: 34796743 PMCID: PMC9075398 DOI: 10.1161/jaha.121.022505] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Background Transesophageal echocardiography (TEE) has been considered the gold standard for left atrial appendage (LAA) thrombus detection. Nevertheless, TEE may sometimes induce discomfort and cause complications. Cardiac computed tomography has been studied extensively for LAA thrombus detection. We performed this systemic review and meta-analysis to assess the diagnostic accuracy of cardiac computed tomography for LAA thrombus detection compared with TEE. Methods and Results A systemic search was conducted in the PubMed, Embase, and Cochrane Library databases from January 1977 to February 2021. Studies performed for assessment diagnostic accuracy of cardiac computed tomography on LAA thrombus compared with TEE were included. Summary sensitivity, specificity, and posterior probability of LAA thrombus was calculated by using bivariate random-effects model. The Quality Assessment of Diagnostic Accuracy Studies-2 tool was used for the quality assessment. A total of 27 studies involving 6960 patients were included in our study. The summary sensitivity of early imaging studies was 0.95 (95% CI, 0.79-0.99), and the specificity was 0.89 (95% CI, 0.85-0.92). The positive posterior probability was 19.11%, and the negative posterior probability was 0.16%. The summary sensitivity of delayed imaging studies was 0.98 (95% CI, 0.92-1.00), and the specificity was 1.00 (95% CI, 0.98-1.00). The positive posterior probability was 95.76%, and the negative posterior probability was 0.12%. The delayed imaging method significantly improved the specificity (1.00 versus 0.89; P<0.05) and positive posterior probability (95.76% versus 19.11%; P<0.05). Conclusions Cardiac computed tomography with a delayed imaging is a reliable alternative to TEE. It may save the patient and health care from an excess TEE. Registration URL: https://www.crd.york.ac.uk/PROSPERO; Unique identifier: CRD42021236352.
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Affiliation(s)
- Shandong Yu
- Department of CardiologyCardiovascular CenterBeijing Friendship HospitalBeijingChina
| | - Heping Zhang
- Department of CardiologyCardiovascular CenterBeijing Friendship HospitalBeijingChina
| | - Hongwei Li
- Department of CardiologyCardiovascular CenterBeijing Friendship HospitalBeijingChina
- Department of Internal MedicineMedical Health CenterBeijing Friendship HospitalBeijingChina
- Beijing Key Laboratory of Metabolic Disorder‐Related Cardiovascular DiseaseBeijingChina
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Molina-Fuentes MF, Neumann R, Behringer W, Franz M, Schulze PC, Witte OW, Günther A, Klingner C, Lehmkuhl L, Steiniger B, Teichgräber U, Rod JE, Mayer TE. Feasibility of the Big 5-Jena eCS Protocol : First Experience Implementing a New Extended CT Protocol in the Initial Diagnostics of Ischemic Stroke. Clin Neuroradiol 2021; 31:901-909. [PMID: 34379134 PMCID: PMC8356684 DOI: 10.1007/s00062-021-01058-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 06/18/2021] [Indexed: 10/25/2022]
Abstract
PURPOSE The most common protocols in the initial diagnostic of acute ischemic stroke do not assess cardiogenic or aortic causes of embolism. These are usually evaluated later by transthoracic (TTE) or transesophageal (TEE) echocardiography. This study aimed to evaluate the feasibility of a diagnostic tool for thoracic cardiovascular thrombi according to the first experience with a new extended cardio-stroke protocol (Big 5-Jena eCS protocol) in acute stroke patients. METHODS Retrospective analyses of the tomography scans database of the Jena University Hospital were performed. We included a total of 67 patients in the feasibility analyses, based on the evaluation of three outcomes. RESULTS Primary outcome: the Big 5-Jena eCS protocol was able to detect thoracic cardiovascular thrombi in a total of 20 patients in different locations including the arch of the aorta, the aortic valve, the left atrium, the left atrial appendage, the left ventricle, and the pulmonary arteries. Secondary outcome: implementating the protocol did not result in a significant elevation of the radiation exposure compared to traditional protocols. Tertiary outcome: the new protocol identified seven cases that were considered negative by echocardiography. CONCLUSION The implementation of an extended cardio-stroke protocol is feasible, no significantly time-consuming, acquiring assessable imaging, and maintaining radiation exposure acceptable. The Big 5-Jena eCS protocol was also able to detect some thrombi not reported by TTE or TEE; however, due to our data's explorative character, a conclusive comparison with cardiac ultrasound is not possible. A prospective pilot study and clinical trials should be conducted to assess the diagnostic accuracy of this protocol compared to echocardiography and determine the potential impact on diagnostic and treatment decisions.
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Affiliation(s)
- Moisés F Molina-Fuentes
- Department of Neuroradiology, Jena University Hospital-Friedrich Schiller University, Jena, Germany. .,Department of Diagnostic and Interventional Radiology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany. .,Institute for Diagnostic and Interventional Radiology, Jena University Hospital-Friedrich Schiller University, Jena, Germany.
| | - Rotraud Neumann
- Department of Neuroradiology, Jena University Hospital-Friedrich Schiller University, Jena, Germany.,Institute for Diagnostic and Interventional Radiology, Jena University Hospital-Friedrich Schiller University, Jena, Germany
| | - Wilhelm Behringer
- Emergency Department, Jena University Hospital-Friedrich Schiller University, Jena, Germany
| | - Marcus Franz
- Department of Internal Medicine, Jena University Hospital-Friedrich Schiller University, Jena, Germany
| | - P Christian Schulze
- Department of Internal Medicine, Jena University Hospital-Friedrich Schiller University, Jena, Germany
| | - Otto W Witte
- Hans Berger Department of Neurology, Jena University Hospital-Friedrich Schiller University, Jena, Germany
| | - Albrecht Günther
- Hans Berger Department of Neurology, Jena University Hospital-Friedrich Schiller University, Jena, Germany
| | - Carsten Klingner
- Hans Berger Department of Neurology, Jena University Hospital-Friedrich Schiller University, Jena, Germany
| | - Lukas Lehmkuhl
- Clinic for Radiology, Rhön-Klinikum Campus Bad Neustadt, Bad Neustadt a. d. Saale, Germany
| | - Beatrice Steiniger
- Institute for Diagnostic and Interventional Radiology, Jena University Hospital-Friedrich Schiller University, Jena, Germany
| | - Ulf Teichgräber
- Institute for Diagnostic and Interventional Radiology, Jena University Hospital-Friedrich Schiller University, Jena, Germany
| | - J E Rod
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia
| | - Thomas E Mayer
- Department of Neuroradiology, Jena University Hospital-Friedrich Schiller University, Jena, Germany.,Institute for Diagnostic and Interventional Radiology, Jena University Hospital-Friedrich Schiller University, Jena, Germany
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Szekely Y, Shmilovich H, Hochstadt A, Ghantous E, Topilsky Y, Aviram G, Hadad Y, Arbel Y, Konigstein M, Banai S, Finkelstein A, Halkin A. Long-term implications of left atrial appendage thrombus identified incidentally by pre-procedural cardiac computed tomography angiography in patients undergoing transcatheter aortic valve replacement. Eur Heart J Cardiovasc Imaging 2021; 22:563-571. [PMID: 32154881 DOI: 10.1093/ehjci/jeaa030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Revised: 01/18/2020] [Accepted: 02/12/2020] [Indexed: 11/12/2022] Open
Abstract
AIMS The prevalence and prognostic implications of left atrial appendage (LAA) thrombus (LAAT) in patients considered for transcatheter aortic valve replacement (TAVR) are incompletely defined. We, therefore, studied pre-procedural cardiac computed tomography angiography (CCTA) scans of TAVR candidates to determine the prevalence of LAAT and its association with late outcomes. METHODS AND RESULTS Baseline clinical variables and CCTA findings from a prospective TAVR registry were analysed for the prevalence of pre-procedural LAAT and its impact on in-hospital outcomes and late mortality. LAAT was differentiated from LAA filling defects (LAAFD) reflecting stasis without clot. Patients (n = 561) with complete in-hospital and late mortality data were included in the study (median follow-up 31.6 months). LAAT and LAAFD were evidenced on pre-procedural CCTA in 24 (4.3%) and 26 (4.6%) patients, respectively. One hundred fourteen (20.3%) patients died during the study period. Though in-hospital adverse event rates (including stroke) did not differ among groups, mortality at long-term follow-up was higher among LAAT patients compared with those with or without LAAFD (58.3% vs. 11.5% vs. 19.0%, respectively; P < 0.003). By multivariable analysis, LAAT (but not LAAFD) was independently associated with all-cause mortality [hazard ratio (HR) = 3.33 (1.83-6.00), P < 0.001]. In patients with LAAT, oral anticoagulation at discharge was associated with lower mortality risk, independently of atrial fibrillation status. CONCLUSIONS LAAT visualized by pre-procedural CCTA is an independent predictor of late mortality following TAVR, but not peri-procedural stroke. When reporting TAVR-CCTA, particular note should be made of LAA features and presence of LAAT which may have prognostic and management implications.
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Affiliation(s)
- Yishay Szekely
- Department of Cardiology, Tel Aviv Medical Center affiliated with the Sackler Faculty of Medicine, Tel Aviv University, 6 Weizmann Street, Tel Aviv 64239, Israel
| | - Haim Shmilovich
- Department of Cardiology, Tel Aviv Medical Center affiliated with the Sackler Faculty of Medicine, Tel Aviv University, 6 Weizmann Street, Tel Aviv 64239, Israel
| | - Aviram Hochstadt
- Department of Cardiology, Tel Aviv Medical Center affiliated with the Sackler Faculty of Medicine, Tel Aviv University, 6 Weizmann Street, Tel Aviv 64239, Israel
| | - Eihab Ghantous
- Department of Cardiology, Tel Aviv Medical Center affiliated with the Sackler Faculty of Medicine, Tel Aviv University, 6 Weizmann Street, Tel Aviv 64239, Israel
| | - Yan Topilsky
- Department of Cardiology, Tel Aviv Medical Center affiliated with the Sackler Faculty of Medicine, Tel Aviv University, 6 Weizmann Street, Tel Aviv 64239, Israel
| | - Galit Aviram
- Department of Radiology, Tel Aviv Medical Center affiliated with the Sackler Faculty of Medicine, Tel Aviv University, 6 Weizmann Street, Tel Aviv 64239, Israel
| | - Yitzhak Hadad
- Department of Radiology, Tel Aviv Medical Center affiliated with the Sackler Faculty of Medicine, Tel Aviv University, 6 Weizmann Street, Tel Aviv 64239, Israel
| | - Yaron Arbel
- Department of Cardiology, Tel Aviv Medical Center affiliated with the Sackler Faculty of Medicine, Tel Aviv University, 6 Weizmann Street, Tel Aviv 64239, Israel
| | - Maayan Konigstein
- Department of Cardiology, Tel Aviv Medical Center affiliated with the Sackler Faculty of Medicine, Tel Aviv University, 6 Weizmann Street, Tel Aviv 64239, Israel
| | - Shmuel Banai
- Department of Cardiology, Tel Aviv Medical Center affiliated with the Sackler Faculty of Medicine, Tel Aviv University, 6 Weizmann Street, Tel Aviv 64239, Israel
| | - Ariel Finkelstein
- Department of Cardiology, Tel Aviv Medical Center affiliated with the Sackler Faculty of Medicine, Tel Aviv University, 6 Weizmann Street, Tel Aviv 64239, Israel
| | - Amir Halkin
- Department of Cardiology, Tel Aviv Medical Center affiliated with the Sackler Faculty of Medicine, Tel Aviv University, 6 Weizmann Street, Tel Aviv 64239, Israel
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Chaosuwannakit N, Makarawate P. Prevalence of intracardiac thrombi on cardiac computed tomography angiography: Outcome and impact on consequent management. Eur J Radiol Open 2021; 8:100330. [PMID: 33665232 PMCID: PMC7902280 DOI: 10.1016/j.ejro.2021.100330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 02/04/2021] [Accepted: 02/08/2021] [Indexed: 11/27/2022] Open
Abstract
Objective Intracardiac thrombi are intermittently come across on cardiac computed tomography angiography (CCTA). This study aimed to examine the prevalence, outcome, and prognosis in patients with incidental found left-sided cardiac thrombi on CCTA. Material and Methods The Ethics Committee approved the present study of the Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand. A retrospective review of CCTA was performed for incidental left-sided cardiac thrombi. Results A total of 1080 CCTAs were enrolled with the prevalence of incidental left-sided cardiac thrombi is 4.53%. Of the 49 patients with CCTA incidental left-sided cardiac thrombi, 16 had left atrial thrombi, and 33 had left ventricular thrombi. All thrombi were undetermined before the CCTA, and their identification subsequently generated anticoagulation treatment. In 10 patients, embolic complications happened, 4 of which were fatal. Patients with incidental detected left-sided intracardiac thrombi seen by CCTA had more embolic event than patients who did not discover left-sided intracardiac thrombi by CCTA (HR = 8.07; 95% CI 1.48-44.06; p = 0.016). Conclusions Incidental left-sided cardiac thrombi on CCTA guided to management adjustments and seemed to present substantial mortality and morbidity in the present study. Physicians who interpret CCTA should ensure a dedicated effort not to disregard these prospective pitfalls.
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Affiliation(s)
- Narumol Chaosuwannakit
- Radiology Department, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40000, Thailand
| | - Pattarapong Makarawate
- Cardiology Unit, Internal medicine Department, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
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Goitein O, Truong MT, Bekker E, Marom EM. Potential Pitfalls in Imaging of the Mediastinum. Radiol Clin North Am 2021; 59:279-290. [PMID: 33551087 DOI: 10.1016/j.rcl.2020.11.003] [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] [Indexed: 10/22/2022]
Abstract
Chest computed tomography (CT) is the modality of choice for mediastinal imaging. The high-resolution images provided by multi-detector CT result in routine visualization of normal anatomic structures, which can be confused with pathology. In addition, many mediastinal abnormalities are discovered incidentally, with a routine chest CT protocol which may be insufficient for definite diagnosis. Awareness of the spectrum of potential pitfalls of mediastinal imaging, artifacts related to flow, motion, and solutions to mitigate these problematic issues is important in accurate interpretation. The purpose of this review is to highlight and discuss potential pitfalls in the imaging of the mediastinum.
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Affiliation(s)
- Orly Goitein
- Department of Diagnostic Imaging, Division of Cardiovascular Imaging, The Chaim Sheba Medical Center (affiliated with Tel Aviv University), Derech Sheba 2, Ramat Gan, Israel.
| | - Mylene T Truong
- Department of Diagnostic Imaging, Division of Thoracic Imaging, University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA
| | - Elena Bekker
- Department of Diagnostic Imaging, Division of Cardiovascular Imaging, The Chaim Sheba Medical Center (affiliated with Tel Aviv University), Derech Sheba 2, Ramat Gan, Israel; Department of Diagnostic Imaging, Division of Thoracic Imaging, The Chaim Sheba Medical Center (affiliated with Tel Aviv University), Derech Sheba 2, Ramat Gan, Israel
| | - Edith M Marom
- Department of Diagnostic Imaging, Division of Thoracic Imaging, The Chaim Sheba Medical Center (affiliated with Tel Aviv University), Derech Sheba 2, Ramat Gan, Israel
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Echocardiography versus computed tomography and cardiac magnetic resonance for the detection of left heart thrombosis: a systematic review and meta-analysis. Clin Res Cardiol 2020; 110:1697-1703. [DOI: 10.1007/s00392-020-01741-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 09/03/2020] [Indexed: 11/26/2022]
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10
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Spagnolo P, Giglio M, Di Marco D, Cannaò PM, Agricola E, Della Bella PE, Monti CB, Sardanelli F. Diagnosis of left atrial appendage thrombus in patients with atrial fibrillation: delayed contrast-enhanced cardiac CT. Eur Radiol 2020; 31:1236-1244. [PMID: 32886202 PMCID: PMC7880950 DOI: 10.1007/s00330-020-07172-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 06/05/2020] [Accepted: 08/10/2020] [Indexed: 12/11/2022]
Abstract
Objectives The current reference standard for diagnosing LAA thrombi is transesophageal echocardiography (TEE), a semi-invasive technique. We aimed to devise an optimal protocol for cardiac computed tomography (CCT) in diagnosing left atrial appendage (LAA) thrombus in patients with atrial fibrillation (AF), using TEE as reference standard. Methods Two hundred sixty consecutive patients referred for radiofrequency ablation for AF were prospectively enrolled. All patients underwent CCT and TEE within 2 hours. The CCT protocol included one standard angiographic phase and three delayed acquisitions at 1-, 3-, and 6-min after contrast injection. Thrombi were defined as persisting defects at 6-min delayed acquisition. Results TEE demonstrated spontaneous contrast in 52 (20%) patients and thrombus in 10 (4%). In 63 patients (24%), CCT demonstrated LAA early filling defects at angiographic phase. Among them, 15 (6%) had a persistent defect at 1-min, 12 (5%) at 3-min, and 10 (4%) at 6-min. All 10 thrombi diagnosed on TEE were correctly identified by delayed CCT, without any false positives. For all phases, sensitivity and negative predictive were 100%. Specificity increased from 79% for the angiographic phase to 100% at 6-min. Positive predictive value increased from 16% to 100%. Estimated radiation exposure was 2.08 ± 0.76 mSv (mean ± standard deviation) for the angiographic phase and 0.45 ± 0.23 mSv for each delayed phase. Conclusion A CCT protocol adding a 6-min delayed phase to the angiographic phase can be considered optimized for the diagnosis of LAA thrombi, with a low radiation dose. Key Points • In patients with persistent atrial fibrillation referred for ablation procedures, a cardiac CT examination comprising an angiographic-phase acquisition and, in case of filling defects, a 6-min delayed phase may help reduce the need for transesophageal echocardiography. • Cardiac CT would provide morphological and volumetric data, along with the potential to exclude the presence of thrombi in the left atrial appendage.
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Affiliation(s)
- Pietro Spagnolo
- Department of Radiology, IRCCS Policlinico San Donato, San Donato Milanese, Milan, Italy
| | - Manuela Giglio
- Department of Radiology, IRCCS Policlinico San Donato, San Donato Milanese, Milan, Italy
| | - Daniela Di Marco
- Department of Radiology, Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Paola M Cannaò
- Department of Radiology, IRCCS Policlinico San Donato, San Donato Milanese, Milan, Italy
| | - Eustachio Agricola
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
- Cardiovascular Imaging Unit, Cardio-Thoracic-Vascular Department, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Paolo E Della Bella
- Arrhythmia Unit and Electrophysiology Laboratories, Department of Cardiology and Cardiothoracic Surgery, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Caterina B Monti
- Department of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy.
| | - Francesco Sardanelli
- Department of Radiology, IRCCS Policlinico San Donato, San Donato Milanese, Milan, Italy
- Department of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy
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11
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Vira T, Pechlivanoglou P, Connelly K, Wijeysundera HC, Roifman I. Cardiac computed tomography and magnetic resonance imaging vs. transoesophageal echocardiography for diagnosing left atrial appendage thrombi. Europace 2020; 21:e1-e10. [PMID: 29961869 DOI: 10.1093/europace/euy142] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 05/25/2018] [Indexed: 11/13/2022] Open
Abstract
Aims Transoesophageal echocardiography (TOE) is the gold standard for identification of left atrial appendage (LAA) thrombi. However, TOE is semi-invasive and cannot be performed in certain patients. Left atrial appendage thrombi can also be identified by cardiac computed tomography (CCT) and cardiac magnetic resonance imaging (CMR); however, the diagnostic performance of these techniques vs. TOE is unclear. Methods and results We performed a systematic review and meta-analysis of 22 CCT and 4 CMR studies comparing diagnostic performance to TOE for identification of LAA thrombi. Meta-regression was performed to determine whether expected sensitivity and specificity differed between early and delayed image acquisition protocols for CCT vs. TOE and between CCT and CMR. Cardiac computed tomography demonstrated sensitivity and specificity of 0.99 [confidence interval (CI 0.93-1.00)] and 0.94 (CI 0.90-0.97) respectively vs. TOE. A subgroup analysis comparing early vs. delayed protocol CCT imaging was performed showing no significant differences in sensitivity (P-value = 0.17) however improved specificity of the delayed imaging protocols (P-value = 0.04). Cardiac magnetic resonance imaging demonstrated sensitivity and specificity of 0.80 (CI 0.63-0.91) and 0.98 (CI 0.97-0.99), respectively when compared to TOE. There was no significant difference in sensitivity or specificity between CMR and CCT (P-values 0.996 and 0.484, respectively). Conclusion Cardiac computed tomography and CMR had good to excellent sensitivity and specificity vs. TOE. Further, there was no significant difference in the sensitivity and specificity of CCT vs. CMR, suggesting that both modalities can be considered reasonable alternatives to TOE in the identification of LAA thrombi. Cardiac magnetic resonance imaging may be especially beneficial when TOE and CCT cannot be performed.
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Affiliation(s)
- Tasnim Vira
- Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, Toronto, Ontario, Canada
| | - Petros Pechlivanoglou
- Child Health Evaluative Sciences, The Hospital for Sick Children, 555 University Ave, Toronto, Ontario, Canada.,Institute for Health Policy Management and Evaluation and the Institute for Clinical Evaluative Sciences, 155 College St, Toronto, Ontario, Canada
| | - Kim Connelly
- Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, Toronto, Ontario, Canada.,St Michael's Hospital, University of Toronto, 30 Bond St, Toronto, Ontario, Canada
| | - Harindra C Wijeysundera
- Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, Toronto, Ontario, Canada.,Institute for Health Policy Management and Evaluation and the Institute for Clinical Evaluative Sciences, 155 College St, Toronto, Ontario, Canada
| | - Idan Roifman
- Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, Toronto, Ontario, Canada.,Institute for Health Policy Management and Evaluation and the Institute for Clinical Evaluative Sciences, 155 College St, Toronto, Ontario, Canada
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Arabia L, Lucino S, Tibaldi J, Gambi DL, García R, Pérez ME, Bottello F. Use of Computed Tomography Scan to Rule Out Phantom Thrombus in the Left Atrial Appendage. JOURNAL OF CARDIAC ARRHYTHMIAS 2020. [DOI: 10.24207/jca.v33i1.3392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Occurrence of left atrial appendage (LAA) thrombus is a frequent complication of atrial fibrillation (AF) and it increase thromboembolic risk. Transesophageal echocardiography (TEE) is considered the gold standard to ensure that this chamber is thrombus free. Multidetector computed tomography (CT) scan has some advantages such the possibility to get 3D reconstruction and explore another structures in relationship with the LAA. However, lack of specificity in case of false positive images with filling defects due to slow velocities in the LAA. Methods and Results: 34 patiens with suspected thrombus by a previous CT scan or transesophageal echo were included in analisys. The aim of study was evaluated the utility of CT scan with delayed acquisition protocol to exclude LAA thrombus. In all of patients, complete LAA filling was observed, with a sensitivity, specificity and negative predictive value of 100% to differentiate circulatory stasis from thrombus. Conclusion: Perform a CT scan with a delayed acquisition protocol and in prone position are safe techniques to rule out fake thrombus.
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Osawa K, Nakanishi R, Ceponiene I, Nezarat N, French WJ, Budoff MJ. Predicting Left Atrial Appendage Thrombus from Left Atrial Volume and Confirmation by Computed Tomography with Delayed Enhancement. Tex Heart Inst J 2020; 47:78-85. [PMID: 32603460 DOI: 10.14503/thij-17-6290] [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] [Indexed: 11/23/2022]
Abstract
Assessing thromboembolic risk is crucial for proper management of patients with atrial fibrillation. Left atrial volume is a promising predictor of cardiac thrombosis. To determine whether left atrial volume can predict left atrial appendage thrombus in patients with atrial fibrillation, we conducted a prospective study of 73 patients. Left atrial and ventricular volumes were evaluated by cardiac computed tomography with retrospective electrocardiographic gating and then indexed to body surface area. Left atrial appendage thrombus was confirmed or excluded by cardiac computed tomography with delayed enhancement. Seven patients (9.6%) had left atrial appendage thrombus; 66 (90.4%) did not. Those with thrombus had a significantly higher mean left atrial end-systolic volume index (139 ± 55 vs 101 ± 35 mL/m2; P =0.0097) and mean left atrial end-diastolic volume index (122 ± 45 vs 84 ± 34 mL/m2; P =0.0077). On multivariate logistic regression analysis, left atrial end-systolic volume index (per 10 mL/m2 increase) was significantly associated with left atrial appendage thrombus (odds ratio [OR]=1.24; 95% CI, 1.03-1.50; P =0.02); so too was the left atrial end-diastolic volume index (per 10 mL/m2 increase) (OR=1.29; 95% CI, 1.05-1.60; P =0.02). These findings suggest that increased left atrial volume increases the risk of left atrial appendage thrombus. Therefore, patients with atrial fibrillation and an enlarged left atrium should be considered for cardiac computed tomography with delayed enhancement to confirm whether thrombus is present.
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Affiliation(s)
- Kazuhiro Osawa
- Department of Medicine, Lundquist Institute at Harbor-UCLA Medical Center, Torrance, California 90502
| | - Rine Nakanishi
- Department of Medicine, Lundquist Institute at Harbor-UCLA Medical Center, Torrance, California 90502
| | - Indre Ceponiene
- Department of Medicine, Lundquist Institute at Harbor-UCLA Medical Center, Torrance, California 90502
| | - Negin Nezarat
- Department of Medicine, Lundquist Institute at Harbor-UCLA Medical Center, Torrance, California 90502
| | - William J French
- Department of Medicine, Lundquist Institute at Harbor-UCLA Medical Center, Torrance, California 90502
| | - Matthew J Budoff
- Department of Medicine, Lundquist Institute at Harbor-UCLA Medical Center, Torrance, California 90502
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Circulatory Stasis or Thrombus in Left Atrial Appendage, An Easy Diagnostic Solution. J Comput Assist Tomogr 2019; 43:406-409. [PMID: 30801566 DOI: 10.1097/rct.0000000000000853] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE The purpose of this study was to assess the diagnostic performance of prone position cardiac multidetector computed tomography (MDCT) in the detection of left atrial appendage (LAA) thrombi and to make differentiate between thrombus and circulatory stasis using transesophageal echocardiography (TEE) as the criterion-standard imaging modality. METHODS From December 2014 to April 2016, 53 consecutive patients were admitted to the hospital because of circulatory stasis or/and thrombus. All patients underwent prone-position MDCT and TEE. Prone-position MDCT and TEE sensitivity, specificity, positive predictive value, and negative predictive value were calculated. RESULTS For the MDCT scan in the prone position, the sensitivity, specificity, positive predictive value, and negative predictive value results were 100%, 100%, 100%, and 100%, respectively. CONCLUSIONS Multidetector computed tomography scanning in the prone position differentiates circulatory stasis and LAA thrombus, is clinically useful for detecting and ruling out LAA thrombus, and may be an alternative to TEE as a diagnostic tool.
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Kawaji T, Numamoto H, Yamagami S, Mabuchi R, Kitamura T, Enoki N, Koizumi K, Kanao S, Kato M, Yokomatsu T, Shizuta S, Miki S, Ono K, Togashi K, Kimura T. Real-time surveillance of left atrial appendage thrombus during contrast computed tomography imaging for catheter ablation: THe Reliability of cOMputed tomography Beyond UltraSound in THROMBUS detection (THROMBUS) study. J Thromb Thrombolysis 2019; 47:42-50. [PMID: 30251193 DOI: 10.1007/s11239-018-1742-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Left atrial contrast computed tomography (LA-CT) as well as transesophageal echocardiography (TEE) can exclude left atrial appendage (LAA) thrombus, but is sometimes unable to evaluate LAA due to incomplete LAA filling. The aim of the current study was to validate the utility of real-time approach of LA-CT with real-time surveillance of LAA-filling defect (FD). We enrolled consecutive 894 patients with LA-CT studies acquired for catheter ablation and compared the diagnostic accuracy in demonstrating LAA-FD between conventional protocol (N = 474) and novel protocol with real-time surveillance of LAA-FD immediately after the initial scanning and, when necessary, adding delayed scanning in the supine or prone position (N = 420). Primary endpoint was severity of LAA-FD classified into the 3 groups: "Grade-0" for complete filling of contrast, "Grade-1" for incomplete filling of contrast, and "Grade-2" for complete FD of contrast. The prevalence of Grade-1 and Grade-2 FD was 17.3% and 11.2% in conventional protocol, whereas there was no patient with Grade-2 FD, and only 1 patient with Grade-1 FD after the additional scanning in novel protocol. In 5 patients with suspected LAA thrombus both by TEE and Grade-2 FD in LA-CT by the conventional protocol, ablation procedure was canceled due to diagnosis of LAA thrombus. Conversely, 4 patients with suspected LAA thrombus by TEE in novel protocol group was proved to have intact LAA by LA-CT with and without additional scanning. This novel approach with real-time surveillance improved the diagnostic accuracy of LA-CT in detecting LAA-FD, suggesting potential superiority of LA-CT over TEE in excluding LAA thrombus.
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Affiliation(s)
- Tetsuma Kawaji
- Department of Cardiology, Mitsubishi Kyoto Hospital, 1 Katsura Gosho-cho, Nishikyo-ku, Kyoto, 615-8087, Japan.
| | - Hitomi Numamoto
- Division of Clinical Radiology Service, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Shintaro Yamagami
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Ryu Mabuchi
- Division of Clinical Radiology Service, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Takaaki Kitamura
- Division of Clinical Radiology Service, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Naomi Enoki
- Division of Clinical Radiology Service, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Koji Koizumi
- Division of Clinical Radiology Service, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Shotaro Kanao
- Department of Radiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Masashi Kato
- Department of Cardiology, Mitsubishi Kyoto Hospital, 1 Katsura Gosho-cho, Nishikyo-ku, Kyoto, 615-8087, Japan
| | - Takafumi Yokomatsu
- Department of Cardiology, Mitsubishi Kyoto Hospital, 1 Katsura Gosho-cho, Nishikyo-ku, Kyoto, 615-8087, Japan
| | - Satoshi Shizuta
- Department of Cardiology, Mitsubishi Kyoto Hospital, 1 Katsura Gosho-cho, Nishikyo-ku, Kyoto, 615-8087, Japan
| | - Shinji Miki
- Department of Cardiology, Mitsubishi Kyoto Hospital, 1 Katsura Gosho-cho, Nishikyo-ku, Kyoto, 615-8087, Japan
| | - Koh Ono
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Kaori Togashi
- Department of Radiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Takeshi Kimura
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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16
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Kottmaier M, Jilek C, Berglar S, Reents T, Bourier F, Semmler V, Telishevska M, Koch-Büttner K, Lengauer S, Kornmayer M, Rousseva E, Brooks S, Hadamitzky M, Kolb C, Hessling G, Deisenhofer I. Exclusion of left atrial thrombus by dual-source cardiac computed tomography prior to catheter ablation for atrial fibrillation. Clin Res Cardiol 2018; 108:150-156. [PMID: 30051177 DOI: 10.1007/s00392-018-1333-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 07/16/2018] [Indexed: 11/26/2022]
Abstract
OBJECTIVES Thromboembolic complications during atrial fibrillation (AF) ablation due to mobilisation of a pre-existing thrombus formation (TF) in the left atrium (LA) are devastating. The gold standard to exclude LA TF is transesophageal echocardiography (TEE). The present study compares sensitivity and specificity of a dual-source cardiac-computed tomography (DS-CT) with TEE for TF exclusion prior to AF ablation. In addition, CT protocols with and without ECG synchronized were evaluated. METHODS In 622 patients, DS-CT as well as TEE to exclude TF was performed less than 48 h prior to AF ablation. Mean age of patients was 60 ± 10 years (69% males, 61% paroxysmal AF). During DS-CT, 280 patients (45%) were in AF. An ECG-synchronized DS-CT was performed in 332 patients, whereas 290 patients underwent DS-CT without ECG synchronization. RESULTS In all patients without suspected TF on DS-CT (n = 552; 88.7%), no thrombus was found on TEE. A TF was suspected on DS-CT in 70 patients, of whom only three patients showed TF on TEE. No TF was detected in the other 67 patients (Fig. 1). Overall, sensitivity for TF detection in DS-CT was 100% and specificity was 89.2% (positive predictive value 4.3%, negative predictive value 100%). The CT protocol (ECG-synchronized versus non-ECG-synchronized) had no significant influence on diagnostic accuracy. Mean dose length product during DS CT was 282 ± 287 mGy cm (synchronized) versus 136 ± 55 mGy cm (non-synchronized) with p < 0.0001. CONCLUSIONS DS-CT is a highly sensitive method for LA thrombus detection in patients undergoing AF ablation. It delivers additional anatomic details of pulmonary veins and LA anatomy with an acceptable radiation exposure. Non-ECG-synchronized DS-CT showed a significantly lower radiation exposure, whereas diagnostic accuracy was comparable. Therefore, DS-CT might serve as primary method to exclude LA TF in patients undergoing AF ablation.
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Affiliation(s)
- Marc Kottmaier
- Department of Electrophysiology, German Heart Center Munich, Technische Universitaet Munich, Lazarettstr. 36, 80636, Munich, Germany.
| | - Clemens Jilek
- Department of Electrophysiology, German Heart Center Munich, Technische Universitaet Munich, Lazarettstr. 36, 80636, Munich, Germany
| | - Sophie Berglar
- Department of Electrophysiology, German Heart Center Munich, Technische Universitaet Munich, Lazarettstr. 36, 80636, Munich, Germany
| | - Tilko Reents
- Department of Electrophysiology, German Heart Center Munich, Technische Universitaet Munich, Lazarettstr. 36, 80636, Munich, Germany
| | - Felix Bourier
- Department of Electrophysiology, German Heart Center Munich, Technische Universitaet Munich, Lazarettstr. 36, 80636, Munich, Germany
| | - Verena Semmler
- Department of Electrophysiology, German Heart Center Munich, Technische Universitaet Munich, Lazarettstr. 36, 80636, Munich, Germany
| | - Martha Telishevska
- Department of Electrophysiology, German Heart Center Munich, Technische Universitaet Munich, Lazarettstr. 36, 80636, Munich, Germany
| | - Katharina Koch-Büttner
- Department of Electrophysiology, German Heart Center Munich, Technische Universitaet Munich, Lazarettstr. 36, 80636, Munich, Germany
| | - Sarah Lengauer
- Department of Electrophysiology, German Heart Center Munich, Technische Universitaet Munich, Lazarettstr. 36, 80636, Munich, Germany
| | - Marielouise Kornmayer
- Department of Electrophysiology, German Heart Center Munich, Technische Universitaet Munich, Lazarettstr. 36, 80636, Munich, Germany
| | - Elena Rousseva
- Department of Electrophysiology, German Heart Center Munich, Technische Universitaet Munich, Lazarettstr. 36, 80636, Munich, Germany
| | - Stephanie Brooks
- Department of Electrophysiology, German Heart Center Munich, Technische Universitaet Munich, Lazarettstr. 36, 80636, Munich, Germany
| | - Martin Hadamitzky
- Department of Electrophysiology, German Heart Center Munich, Technische Universitaet Munich, Lazarettstr. 36, 80636, Munich, Germany
| | - Christoph Kolb
- Department of Electrophysiology, German Heart Center Munich, Technische Universitaet Munich, Lazarettstr. 36, 80636, Munich, Germany
| | - Gabriele Hessling
- Department of Electrophysiology, German Heart Center Munich, Technische Universitaet Munich, Lazarettstr. 36, 80636, Munich, Germany
| | - Isabel Deisenhofer
- Department of Electrophysiology, German Heart Center Munich, Technische Universitaet Munich, Lazarettstr. 36, 80636, Munich, Germany
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17
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Korhonen M, Mustonen P, Hedman M, Vienonen J, Onatsu J, Vanninen R, Taina M. Left atrial appendage morphology and relative contrast agent concentration in patients undergoing coronary artery CTA. Clin Radiol 2018; 73:982.e17-982.e26. [PMID: 30029834 DOI: 10.1016/j.crad.2018.06.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Accepted: 06/08/2018] [Indexed: 12/24/2022]
Abstract
AIM To evaluate whether certain morphological features of the left atrial appendage (LAA) would influence the LAA/ascending aorta (AA) radiodensity ratio, as a reflection of the blood flow conditions in the LAA. MATERIALS AND METHODS Eight-hundred and eight consecutive patients undergoing computed tomography angiography (CCTA) were evaluated. Of these, 749 had no history of atrial fibrillation and none had suffered acute stroke. The LAA/AA radiodensity ratio, and the length, lobe number, and morphological classification of LAAs were assessed. RESULTS The distribution of morphological classes for LAAs were: windsock 62.3%, cactus 18.6%, chicken wing 10.0%, and cauliflower 9.2%. The mean LAA/AA radiodensity ratio was 0.87±0.14 (range 0.22-1.44). Female gender (p=0.001), elevated body mass index (BMI; r=-0.129; p=0.003), and diabetes (p=0.03) were associated with lower LAA/AA radiodensity ratios, while heart failure (p=0.017), significant coronary artery stenosis (p=0.010), and LAAs with multiple lobes (p=0.018), exhibited higher LAA/AA radiodensity ratios. Multiple regression analysis revealed that a short one-lobed cauliflower morphology was an independent predictor (p=0.007) of a decreased LAA/AA radiodensity ratio. CONCLUSION A decline in the LAA/AA radiodensity ratio may reflect decreased blood flow in the LAA, paralleling spontaneous echo contrast in transoesophageal echocardiography. Thus, CCTA might be of value in recognising LAA structures that predispose to decreased blood flow.
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Affiliation(s)
- M Korhonen
- Department of Clinical Radiology, Kuopio University Hospital, P.O. Box 100, FI-70029 KYS, Kuopio, Finland; Unit of Radiology, Institute of Clinical Medicine, University of Eastern Finland, Yliopistonranta 1, FI-70210, Kuopio, Finland.
| | - P Mustonen
- Department of Cardiology, Keski-Suomi Central Hospital, Keskussairaalantie 19 40620 Jyväskylä, Finland
| | - M Hedman
- Heart Center, Kuopio University Hospital, P.O. Box 100 FI-70029 KYS, Kuopio, Finland
| | - J Vienonen
- Unit of Radiology, Institute of Clinical Medicine, University of Eastern Finland, Yliopistonranta 1, FI-70210, Kuopio, Finland
| | - J Onatsu
- NeuroCenter, Kuopio University Hospital, P.O. Box 100 FI-70029 KYS, Kuopio, Finland
| | - R Vanninen
- Department of Clinical Radiology, Kuopio University Hospital, P.O. Box 100, FI-70029 KYS, Kuopio, Finland; Unit of Radiology, Institute of Clinical Medicine, University of Eastern Finland, Yliopistonranta 1, FI-70210, Kuopio, Finland
| | - M Taina
- Department of Clinical Radiology, Kuopio University Hospital, P.O. Box 100, FI-70029 KYS, Kuopio, Finland; Unit of Radiology, Institute of Clinical Medicine, University of Eastern Finland, Yliopistonranta 1, FI-70210, Kuopio, Finland
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Accuracy of cardiac CT in evaluating severity of left atrial appendage spontaneous echo contrast: comparison with transesophageal echocardiography. Int J Cardiovasc Imaging 2018; 34:1147-1154. [PMID: 29460124 DOI: 10.1007/s10554-018-1313-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Accepted: 02/02/2018] [Indexed: 10/18/2022]
Abstract
To investigate the capacity of biphasic cardiac CT (CCT) for qualitative and quantitative evaluation of different grades of left atrial appendage spontaneous echo contrast (LAASEC). The study included 267 inpatients with confirmed atrial fibrillation who underwent both CCT and transesophageal echocardiography (TEE). CT numbers for LAA, ascending aorta (AA), and left atrium (LA) were identified, and ROC curves for LAA, LAA/AA, and LAA/LA were plotted. With TEE as the standard, the sensitivity, specificity, PPV, NPV, and accuracy of CCT for LAASEC grade ≥ 1 were 60.3, 92.9, 92.4, 64.8, and 75.7%; and for grade ≥ 2 were 100.0, 84.4, 71.4, 100.0, and 88.8% respectively. The values of LAA, LAA/AA, and LAA/LA were significantly larger in LAASEC grade 0 versus 1 and in grade 1 versus 2, but were similar in grades 2 and 3 or in grades 3 and 4. The values of LAA/AA were larger in grade 2 versus 4. When the cutoff value for LAA/AA = 0.897, sensitivity, specificity, PPV, NPV, and accuracy of CCT for LAASEC grade ≥ 1 was 89.6, 83.2, 87.9, 85.5, and 86.9% and with a cutoff for LAA/AA of 0.524, the sensitivity, specificity, PPV, NPV, and accuracy for LAASEC grade ≥ 2 was 98.7, 92.7, 84.1, 99.4, and 94.4%. Although CCT showed limited diagnostic accuracy for grade 1 LAASEC, grade ≥ 2 LAASEC could be excluded when there was no LAA filling defect on first-phase CCT, and TEE can be avoided. CCT has an excellent accuracy in diagnosing LAASEC, and quantitative analysis (in particular LAA/AA) is superior.
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Zhai Z, Tang M, Zhang S, Fang P, Jia Y, Feng T, Wang J. Transoesophageal echocardiography prior to catheter ablation could be avoided in atrial fibrillation patients with a low risk of stroke and without filling defects in the late-phase MDCT scan: A retrospective analysis of 783 patients. Eur Radiol 2017; 28:1835-1843. [PMID: 29218612 DOI: 10.1007/s00330-017-5172-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 10/11/2017] [Accepted: 11/03/2017] [Indexed: 11/25/2022]
Abstract
OBJECTIVES To test whether multidetector computed tomography (MDCT) could completely replace transoesophageal echocardiography (TEE) to detect left atrial appendage (LAA) thrombi in atrial fibrillation (AF) patients using a large sample size. METHODS 783 patients with AF who underwent MDCT and TEE before catheter ablation were retrospectively included. Demographic data were obtained. Two radiologists blinded to clinical data made the imaging diagnosis. RESULTS Most of the patients (96.2 %) had a CHA2DS2-VASc score (congestive heart failure, hypertension, age ≥ 75 years old (doubled), diabetes, stroke/transient ischaemic attack/thromboembolism (doubled), vascular disease, age 65-74 years, female sex) ≤ 3. Eight thrombi were identified by TEE, all of which were detected by MDCT; no thrombus was observed with TEE without the observation of filling defects by late-phase MDCT scanning in any of the patients. Using TEE as reference standard, the sensitivity, specificity, positive predictive value and negative predictive value of MDCT for thrombus detection were 100 %, 95.74 % (95 % CI 94.33 %-97.15 %), 19.51 % (95 % CI 16.73 %-22.29 %) and 100 %, respectively. CONCLUSIONS For AF patients with low risk of stroke, when MDCT images showed no filling defect in the late phase, TEE prior to catheter ablation can be avoided. KEY POINTS • MDCT can help detect the presence of LAA thrombus. • TEE can be avoided when late-phase MDCT shows no filling defect. • TEE is required in patients whose MDCT images indicate thrombus.
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Affiliation(s)
- Zhengqin Zhai
- Department of Arrhythmia, State Key Laboratory of Cardiovascular Disease, National Clinical Research Center of Cardiovascular Diseases, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, NO.167, Beilishi Road, Xicheng District, Beijing, China
| | - Min Tang
- Department of Arrhythmia, State Key Laboratory of Cardiovascular Disease, National Clinical Research Center of Cardiovascular Diseases, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, NO.167, Beilishi Road, Xicheng District, Beijing, China.
| | - Shu Zhang
- Department of Arrhythmia, State Key Laboratory of Cardiovascular Disease, National Clinical Research Center of Cardiovascular Diseases, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, NO.167, Beilishi Road, Xicheng District, Beijing, China
| | - Pihua Fang
- Department of Arrhythmia, State Key Laboratory of Cardiovascular Disease, National Clinical Research Center of Cardiovascular Diseases, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, NO.167, Beilishi Road, Xicheng District, Beijing, China
| | - Yuhe Jia
- Department of Arrhythmia, State Key Laboratory of Cardiovascular Disease, National Clinical Research Center of Cardiovascular Diseases, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, NO.167, Beilishi Road, Xicheng District, Beijing, China
| | - Tianjie Feng
- Department of Arrhythmia, State Key Laboratory of Cardiovascular Disease, National Clinical Research Center of Cardiovascular Diseases, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, NO.167, Beilishi Road, Xicheng District, Beijing, China
| | - Jiande Wang
- Department of Arrhythmia, State Key Laboratory of Cardiovascular Disease, National Clinical Research Center of Cardiovascular Diseases, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, NO.167, Beilishi Road, Xicheng District, Beijing, China
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20
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Berte B, Jost CA, Maurer D, Fäh-Gunz A, Pillois X, Naegeli B, Pfyffer M, Sütsch G, Scharf C. Long-term follow-up after left atrial appendage occlusion with comparison of transesophageal echocardiography versus computed tomography to guide medical therapy and data about postclosure cardioversion. J Cardiovasc Electrophysiol 2017; 28:1140-1150. [DOI: 10.1111/jce.13289] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 06/18/2017] [Accepted: 06/23/2017] [Indexed: 11/27/2022]
Affiliation(s)
- Benjamin Berte
- Cardiovascular Center; Klinik Im Park; Zürich Switzerland
| | | | - Dominik Maurer
- Cardiovascular Center; Klinik Im Park; Zürich Switzerland
| | - Anja Fäh-Gunz
- Cardiovascular Center; Klinik Im Park; Zürich Switzerland
| | | | | | - Monica Pfyffer
- Cardiovascular Center; Klinik Im Park; Zürich Switzerland
| | - Gabor Sütsch
- Herzzentrum; Hirslanden Clinic; Zürich Switzerland
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Left atrium and pulmonary vein imaging using sub-millisiviert cardiac computed tomography: Impact on radiofrequency catheter ablation cumulative radiation exposure and outcome in atrial fibrillation patients. Int J Cardiol 2017; 228:805-811. [DOI: 10.1016/j.ijcard.2016.11.203] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 11/06/2016] [Indexed: 01/08/2023]
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22
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Echocardiography for Electrophysiology Procedures. CURRENT ANESTHESIOLOGY REPORTS 2015. [DOI: 10.1007/s40140-015-0138-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Honoris L, Zhong Y, Chu E, Rosenthal D, Li D, Lam F, Budoff MJ. Comparison of contrast enhancement, image quality and tolerability in Coronary CT angiography using 4 contrast agents: A prospective randomized trial. Int J Cardiol 2015; 186:126-8. [PMID: 25818754 DOI: 10.1016/j.ijcard.2015.03.240] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2015] [Accepted: 03/17/2015] [Indexed: 10/23/2022]
Affiliation(s)
- Lily Honoris
- 1124W Carson St, Torrance, CA 90502, United States
| | - Yan Zhong
- 1124W Carson St, Torrance, CA 90502, United States
| | - Edwin Chu
- 1124W Carson St, Torrance, CA 90502, United States
| | | | - Dong Li
- 1124W Carson St, Torrance, CA 90502, United States
| | - Franklin Lam
- 1124W Carson St, Torrance, CA 90502, United States
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Emerging Role of Cardiovascular CT and MRI in the Evaluation of Stroke. AJR Am J Roentgenol 2015; 204:269-80. [DOI: 10.2214/ajr.14.13051] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Funabashi N, Uehara M, Takaoka H, Ozawa K, Kushida S, Kanda J, Fujimoto Y, Kobayashi Y. A two center 320 slice CT study for evaluating coronary arteries in subjects with chronic atrial fibrillation: A comparison of prospective and retrospective ECG-gating acquisition. Int J Cardiol 2014; 177:374-9. [DOI: 10.1016/j.ijcard.2014.07.126] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Accepted: 07/26/2014] [Indexed: 10/24/2022]
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Budoff MJ, Pagali SR, Hamirani YS, Chen A, Cheu G, Gao Y, Li D, Mao S. Sex-specific biatrial volumetric measurements obtained with use of multidetector computed tomography in subjects with and without coronary artery disease. Tex Heart Inst J 2014; 41:286-92. [PMID: 24955043 DOI: 10.14503/thij-12-3061] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Atrial volumetric measurement has proven clinical implications. Advances in cardiac imaging, notably the precision enabled by multidetector computed tomography (MDCT), herald the need for new criteria of what constitutes normal volumetric measurements. With use of 64-slice MDCT, we compared the atrial volumes in healthy individuals with those in individuals with coronary artery disease. By means of manual segmentation, we measured biatrial volume in 686 participants who underwent retrospective electrocardiographic-gated MDCT angiographic evaluation. The study population included a control group of 203 persons with no cardiac abnormalities, and a study group of 483 patients with obstructive coronary artery disease. All variables were compared between men and women and between the groups. We found a significant difference in left atrial end-systolic and end-diastolic volumes between men and women in the control group (P <0.05); however, right atrial volumes were similar. In comparison with the entire control group, the coronary artery disease group had significantly higher left atrial volume, significantly lower right atrial stroke volume, and significantly lower biatrial ejection fraction, except for left atrial ejection fraction in men. Right atrial volume and left atrial stroke volume were not significantly different. The results imply that a sex-specific reference value is necessary for left atrial volumetric evaluation, and that left atrial volume and biatrial ejection fraction (excluding left atrial ejection fraction in men) might be useful during diagnosis and prognosis in patients who have coronary artery disease.
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Affiliation(s)
- Matthew J Budoff
- Division of Cardiology, Los Angeles Biomedical Research Institute at Harbor UCLA Medical Center, Torrance, California 90502
| | - Sandeep R Pagali
- Division of Cardiology, Los Angeles Biomedical Research Institute at Harbor UCLA Medical Center, Torrance, California 90502
| | - Yasmin S Hamirani
- Division of Cardiology, Los Angeles Biomedical Research Institute at Harbor UCLA Medical Center, Torrance, California 90502
| | - Andy Chen
- Division of Cardiology, Los Angeles Biomedical Research Institute at Harbor UCLA Medical Center, Torrance, California 90502
| | - Gordon Cheu
- Division of Cardiology, Los Angeles Biomedical Research Institute at Harbor UCLA Medical Center, Torrance, California 90502
| | - Yanlin Gao
- Division of Cardiology, Los Angeles Biomedical Research Institute at Harbor UCLA Medical Center, Torrance, California 90502
| | - Dong Li
- Division of Cardiology, Los Angeles Biomedical Research Institute at Harbor UCLA Medical Center, Torrance, California 90502
| | - SongShou Mao
- Division of Cardiology, Los Angeles Biomedical Research Institute at Harbor UCLA Medical Center, Torrance, California 90502
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