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Condition: Atrial Fibrillation
Procedure: MRI Scan

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Total 412 results found since Jan 2013.

What Is the Natural Relationship Between Left Atrial Appendage Morphology and History of Stroke?
In a recent issue of the Journal, Di Biase et al. (1) reported that left atrial appendage (LAA) morphology imaged with computed tomography (CT) or magnetic resonance imaging correlated with a history of stroke in patients that were undergoing catheter ablation for atrial fibrillation. We disagree with their impractical and complicated classification of LAA morphology and their conclusion that patients with non-Chicken Wing LAA morphology are significantly more likely to have an embolic event.
Source: Journal of the American College of Cardiology: Cardiovascular Interventions - February 4, 2013 Category: Cardiology Source Type: research

Examination Timing and Lesion Patterns in Diffusion-weighted Magnetic Resonance Imaging of Patients with Classically Defined Transient Ischemic Attack
Conclusions: Acute ischemic lesions on DWI were associated with time-to-DWI and LAA in patients with classically defined TIA. Additionally, we identified some differences in relating factors between patients with single and multiple DWI lesions. These results indicate that time-to-DWI and DWI lesion pattern may be important for the diagnosis and management of TIA.
Source: Journal of Stroke and Cerebrovascular Diseases - January 24, 2013 Category: Neurology Authors: Tetsuya Miyagi, Toshiyuki Uehara, Kazumi Kimura, Yasushi Okada, Yasuhiro Hasegawa, Norio Tanahashi, Akifumi Suzuki, Shigeharu Takagi, Jyoji Nakagawara, Kazumasa Arii, Shinji Nagahiro, Kuniaki Ogasawara, Takehiko Nagao, Shinichiro Uchiyama, Masayasu Matsum Tags: Original Articles Source Type: research

Left ventricular diastolic dysfunction is associated with cerebral white matter lesions (leukoaraiosis) in elderly patients without ischemic heart disease and stroke
ConclusionsThis investigation identified an association between LV diastolic dysfunction and WML. Further investigations are required to clarify whether there is a direct association between the two diseases. Geriatr Gerontol Int 2014; 14 (Suppl. 2): 71–76.
Source: Geriatrics and Gerontology International - March 20, 2014 Category: Geriatrics Authors: Atsuya Shimizu, Takashi Sakurai, Toko Mitsui, Motohiro Miyagi, Kenichiro Nomoto, Manabu Kokubo, Yasuko K Bando, Toyoaki Murohara, Kenji Toba Tags: ORIGINAL ARTICLE Source Type: research

Diagnostic Accuracy and Risk Factors of the Different Lacunar Syndromes
Conclusions: The clinical diagnosis of patients with lacunar syndromes is inaccurate, especially among patients with sensorimotor syndrome. DWI is mandatory for obtaining an accurate diagnosis of the infarct.
Source: Journal of Stroke and Cerebrovascular Diseases - August 11, 2014 Category: Neurology Authors: Marianne Altmann, Bente Thommessen, Ole Morten Rønning, Antje S. Reichenbach, Brynjar Fure Tags: Original Articles Source Type: research

Selective Vulnerability of Cortical Border Zone to Microembolic Infarct Clinical Sciences
Conclusions— A selective vulnerability of cortical border zone to microemboli occurring during atrial fibrillation transcatheter ablation was observed. We hypothesize that such selectivity may apply to microemboli of different sources.
Source: Stroke - June 22, 2015 Category: Neurology Authors: Bergui, M., Castagno, D., D'Agata, F., Cicerale, A., Anselmino, M., Maria Ferrio, F., Giustetto, C., Halimi, F., Scaglione, M., Gaita, F. Tags: Embolic stroke, Computerized tomography and Magnetic Resonance Imaging Clinical Sciences Source Type: research

Stroke in a Young Man Secondary to Paroxysmal Atrial Fibrillation and Thyrotoxicosis: A Case Report
We report a case of a male patient with stroke caused by atrial fibrillation (AF) due to thyrotoxicosis. At hospital admission, he presented hypertension and AF. Magnetic resonance imaging confirmed a right-side ischemic area. The thyrotoxicosis was confirmed by thyroid function and thyroid scintigraphy that showed goiter with diffuse hypercaptation. The patient was treated with tapazole and total thyroidectomy, and pathological findings suggested Graves ’ disease. Hyperthyroidism is associated with increased supraventricular ectopic activity in patients with a normal heart, and may be an important causal link between hy...
Source: Case Reports in Neurology - October 16, 2017 Category: Neurology Source Type: research

Should Patients With Ischemic Stroke or Transient Ischemic Attack With Atrial Fibrillation and Microbleeds Be Anticoagulated? Comments and Opinions
Source: Stroke - November 27, 2017 Category: Neurology Authors: Ashkan Shoamanesh, Andreas Charidimou, Mukul Sharma, Robert G. Hart Tags: Atrial Fibrillation, Magnetic Resonance Imaging (MRI), Anticoagulants Comments and Opinions Source Type: research

Nonpharmacological Management of Atrial Fibrillation in Patients at High Intracranial Hemorrhage Risk Topical Review
Source: Stroke - December 22, 2017 Category: Neurology Authors: M. Edip Gurol Tags: Atrial Fibrillation, Magnetic Resonance Imaging (MRI), Intracranial Hemorrhage, Ischemic Stroke Topical Reviews Source Type: research

Computational modeling identifies embolic stroke of undetermined source patients with potential arrhythmic substrate
Cardiac magnetic resonance imaging (MRI) has revealed fibrosis in embolic stroke of undetermined source (ESUS) patients comparable to levels seen in atrial fibrillation (AFib). We used computational modeling to understand the absence of arrhythmia in ESUS despite the presence of putatively pro-arrhythmic fibrosis. MRI-based atrial models were reconstructed for 45 ESUS and 45 AFib patients. The fibrotic substrate's arrhythmogenic capacity in each patient was assessed computationally. Reentrant drivers were induced in 24/45 (53%) ESUS and 22/45 (49%) AFib models. Inducible models had more fibrosis (16.7 ±5.45%) than non-ind...
Source: eLife - May 4, 2021 Category: Biomedical Science Tags: Computational and Systems Biology Medicine Source Type: research

Acute Cerebral Microinfarcts in Acute Ischemic Stroke: Imaging and Clinical Significance
Conclusions: We have shown A-CMIs occur in cortical and subcortical regions in nearly half of AIS patients, where microembolism and CSVD are, respectively, the key presumed etiological mechanism.Cerebrovasc Dis
Source: Cerebrovascular Diseases - April 29, 2022 Category: Neurology Source Type: research

Case report: Bilateral posterior ischemic optic neuropathy in a patient with atrial fibrillation and multifocal embolic stroke
An 80-year-old female with a history of diabetes mellitus (DM) and hypertension presented with sudden onset of sequential bilateral visual loss. The best visual acuity was light perception in the right eye and finger counting in the left eye, however, bilateral fundus did not reveal optic disc edema. Diffusion-weighted magnetic resonance imaging (MRI) of the brain revealed acute embolic stroke and diffusion restriction in the posterior portion of both optic nerves. The 24-h Holter monitor showed persistent atrial fibrillation (AF) with rapid ventricular response. The presence of painless and severe visual loss at onset una...
Source: Frontiers in Neurology - December 2, 2022 Category: Neurology Source Type: research

Large Left Ventricular Pseudoaneurysm Presenting as an Embolic Stroke After a "Silent" Myocardial Infarction
Tex Heart Inst J. 2023 Mar 1;50(2):e227922. doi: 10.14503/THIJ-22-7922.ABSTRACTA 72-year-old woman with no history of coronary artery disease presented with an acute left middle cerebral artery stroke and was found to have a large left ventricular pseudoaneurysm measuring 8.7 × 7.6 cm and 2 large left ventricular thrombi, the source of her systemic embolization. Despite initial medical management, she developed refractory New York Heart Association functional class III heart failure, uncontrolled atrial fibrillation, and further enlargement of her pseudoaneurysm to 5.5 × 10.6 × 9.2 cm. She underwent urgent aneurysmectom...
Source: Texas Heart Institute Journal - March 29, 2023 Category: Cardiology Authors: Cameron Incognito Joshua Parker Michael Arustamyan Milad Matta Kristine Posadas Ran Lee Source Type: research