Comparison of Magnetic Resonance Imaging and Transesophageal Echocardiography in Detection of Thrombus in the Left Atrial Appendage
| Autor: | Masakazu Kohno, Hideo Ohyama, Naohisa Hosomi, James A. Koziol, Kunihiko Osaka, Tsutomu Takahashi, Katsufumi Mizushige |
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| Rok vydání: | 2003 |
| Předmět: |
Male
medicine.medical_specialty genetic structures Heart disease Predictive Value of Tests Left atrial Atrial Fibrillation Image Processing Computer-Assisted Secondary Prevention Humans Medicine Atrial Appendage cardiovascular diseases Thrombus Stroke Aged Aged 80 and over Advanced and Specialized Nursing medicine.diagnostic_test business.industry Vascular disease Reproducibility of Results Thrombosis Magnetic resonance imaging Atrial fibrillation Middle Aged medicine.disease Magnetic Resonance Imaging Embolism cardiovascular system Female Neurology (clinical) Radiology Cardiology and Cardiovascular Medicine business Echocardiography Transesophageal |
| Zdroj: | Stroke. 34:2436-2439 |
| ISSN: | 1524-4628 0039-2499 |
| DOI: | 10.1161/01.str.0000090350.73614.0f |
| Popis: | Background and Purpose— A noninvasive technique of visualizing the left atrial appendage (LAA) and its thrombus in patients with atrial fibrillation would be of great interest. This study examined the utility of MRI for the assessment of thrombus in the LAA. Methods— We evaluated 50 subjects with nonrheumatic continuous atrial fibrillation and a history of cardioembolic stroke. Each patient received an MRI and a transesophageal echocardiography (TEE) on the same day for thrombus detection in the LAA. Both double- and triple-inversion recovery sequences were used for the MRI evaluations. Results— In all subjects, the LAA was readily visualized with MRI. High-intensity masses in the LAA were clearly distinguishable from the LAA wall in the triple–inversion recovery sequences. Concordance between detection of high-intensity mass with MRI and thrombus with TEE was high: no mass (MRI), no thrombus (TEE), 31 patients; mass (MRI), thrombus (TEE), 16 patients; and mass (MRI), no thrombus (TEE), 3 patients (overall κ=0.876, SE=0.068). Conclusions— MRI is a noninvasive and reproducible modality for thrombus detection in the LAA of patients with nonrheumatic continuous atrial fibrillation and previous cardioembolic stroke. |
| Databáze: | OpenAIRE |
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