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chronic total occlusion mri

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https://www.readbyqxmd.com/read/28323841/detection-of-crossed-cerebellar-diaschisis-in-hyperacute-ischemic-stroke-using-arterial-spin-labeled-mr-imaging
#1
Koung Mi Kang, Chul-Ho Sohn, Seung Hong Choi, Keun-Hwa Jung, Roh-Eul Yoo, Tae Jin Yun, Ji-Hoon Kim, Sun-Won Park
BACKGROUND AND PURPOSE: Arterial spin-labeling (ASL) was recently introduced as a noninvasive method to evaluate cerebral hemodynamics. The purposes of this study were to assess the ability of ASL imaging to detect crossed cerebellar diaschisis (CCD) in patients with their first unilateral supratentorial hyperacute stroke and to identify imaging or clinical factors significantly associated with CCD. MATERIALS AND METHODS: We reviewed 204 consecutive patients who underwent MRI less than 8 hours after the onset of stroke symptoms...
2017: PloS One
https://www.readbyqxmd.com/read/28256296/prediction-of-functional-recovery-after-percutaneous-coronary-revascularization-for-chronic-total-occlusion-using-late-gadolinium-enhanced-magnetic-resonance-imaging
#2
Tatsuya Nakachi, Shingo Kato, Hidekuni Kirigaya, Naoki Iinuma, Kazuki Fukui, Naka Saito, Tae Iwasawa, Masami Kosuge, Kazuo Kimura, Kouichi Tamura
BACKGROUND: Limited data are available regarding the prediction for functional recovery using late gadolinium enhanced magnetic resonance imaging (LGE MRI) after coronary revascularization for chronic total occlusion (CTO PCI). METHODS: We studied 59 patients (mean age, 66±11 years) who underwent successful CTO PCI. Two-dimensional echocardiography and strain measurements were performed before and 8±2 months after CTO PCI. The findings of segmental assessment were compared with the extent of LGE MRI using a 16-segment model...
February 27, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/28242588/effects-of-successful-percutaneous-coronary-intervention-of-chronic-total-occlusions-on-myocardial-perfusion-and-left-ventricular-function
#3
Wijnand J Stuijfzand, P Stefan Biesbroek, Pieter G Raijmakers, Roel S Driessen, Stefan P Schumacher, Pepijn van Diemen, Jeffrey van den Berg, Robin Nijveldt, Adriaan A Lammertsma, Simon J Walsh, Colm G Hanratty, James C Spratt, Albert C van Rossum, Alexander Nap, Niels van Royen, Paul Knaapen
AIMS: The aim of the present study was to investigate the effects of successful PCI CTO on absolute myocardial blood flow (MBF) and functional recovery. METHODS AND RESULTS: Patients with a documented CTO were prospectively examined for ischemia and viability with H215O positron emission tomography (PET) and late gadolinium enhancement cardiac magnetic resonance imaging (LGE-CMR). Sixty-nine consecutive patients, in whom PCI was successful, underwent follow-up PET and CMR after approximately 12 weeks to evaluate potential improvement of MBF as well as systolic function...
February 28, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28155111/association-between-duration-of-coronary-occlusion-and-high-intensity-signal-on-t1-weighted-magnetic-resonance-imaging-among-patients-with-angiographic-total-occlusion
#4
Kenji Matsumoto, Shoichi Ehara, Takao Hasegawa, Mikumo Sakaguchi, Kenei Shimada
OBJECTIVES: To evaluate the association between duration of the coronary occlusion and high-intensity signal (HIS) on noncontrast T1-weighted imaging using a 1.5-T magnetic resonance imager among patients with angiographic coronary total occlusion. METHODS: The signal intensity of the coronary target area divided by the signal intensity of the left ventricular muscle near the target area at each site (TMR) was measured. Areas with a TMR >1.0 were defined as HIS...
February 2, 2017: European Radiology
https://www.readbyqxmd.com/read/28113280/miniaturizing-floating-traps-to-increase-rf-safety-of-magnetic-resonance-guided-percutaneous-procedures
#5
Gregory Griffin, Kevan Anderson, Graham Wright
OBJECTIVE: MRI in the area of cardiovascular catheter-based interventional procedures is an active field. A common intervention - revascularization of chronic total occlusions, requires a conductive guidewire for revascularization. The mechanical properties of guidewires are paramount to the successful execution of such procedures. Furthermore to benefit from MRI techniques, additional conductors are required to transmit signal from the tip of a catheter. Long thin conductors in MRI systems pose a safety risk in the form of RF heating due to induced RF currents on the conductors...
April 20, 2016: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28113187/miniaturizing-floating-traps-to-increase-rf-safety-of-magnetic-resonance-guided-percutaneous-procedures
#6
Gregory H Griffin, Kevan J T Anderson, Graham A Wright
OBJECTIVE: MRI in the area of cardiovascular catheter-based interventional procedures is an active field. A common intervention-revascularization of chronic total occlusions, requires a conductive guidewire for revascularization. The mechanical properties of guidewires are paramount to the successful execution of such procedures. Furthermore to benefit from MRI techniques, additional conductors are required to transmit signal from the tip of a catheter. Long thin conductors in MRI systems pose a safety risk in the form of RF heating due to induced RF currents on the conductors...
February 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28018468/posterior-reversible-encephalopathy-syndrome-caused-by-presumed-takayasu-arteritis
#7
Ki Wuk Lee, Sang Taek Lee, Heeyeon Cho
Takayasu arteritis (TA) is a chronic inflammatory disease of unknown etiology that affects mainly the aorta, main aortic branches, and pulmonary arteries. Diverse neurological manifestations of TA have rarely been reported in children. Posterior reversible encephalopathy syndrome (PRES) is a neuroradiological condition that presents with headache, seizure, visual disturbances, and characteristic lesions on imaging. Inflammatory condition and severe hypertension in TA can cause PRES. We report of a 5-year-old girl with presumed TA who presented with PRES and chronic total occlusion in the renal artery...
November 2016: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/27927700/cardiac-%C3%AE-v%C3%AE-3-integrin-expression-following-acute-myocardial-infarction-in-humans
#8
William S A Jenkins, Alex T Vesey, Colin Stirrat, Martin Connell, Christophe Lucatelli, Anoushka Neale, Catriona Moles, Anna Vickers, Alison Fletcher, Tania Pawade, Ian Wilson, James H F Rudd, Edwin J R van Beek, Saeed Mirsadraee, Marc R Dweck, David E Newby
OBJECTIVE: Maladaptive repair contributes towards the development of heart failure following myocardial infarction (MI). The αvβ3 integrin receptor is a key mediator and determinant of cardiac repair. We aimed to establish whether αvβ3 integrin expression determines myocardial recovery following MI. METHODS: (18)F-Fluciclatide (a novel αvβ3-selective radiotracer) positron emission tomography (PET) and CT imaging and gadolinium-enhanced MRI (CMR) were performed in 21 patients 2 weeks after ST-segment elevation MI (anterior, n=16; lateral, n=4; inferior, n=1)...
December 7, 2016: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/27712774/percutaneous-intervention-for-concurrent%C3%A2-chronic-total-occlusions-in%C3%A2-patients-with%C3%A2-stemi-the-explore-trial
#9
José P S Henriques, Loes P Hoebers, Truls Råmunddal, Peep Laanmets, Erlend Eriksen, Matthijs Bax, Dan Ioanes, Maarten J Suttorp, Bradley H Strauss, Emanuele Barbato, Robin Nijveldt, Albert C van Rossum, Koen M Marques, Joëlle Elias, Ivo M van Dongen, Bimmer E P M Claessen, Jan G Tijssen, René J van der Schaaf
BACKGROUND: In 10% to 15% of patients with ST-segment elevation myocardial infarction (STEMI), concurrent coronary chronic total occlusion (CTO) in a non-infarct-related artery is present and is associated with increased morbidity and mortality. OBJECTIVES: The EXPLORE (Evaluating Xience and Left Ventricular Function in Percutaneous Coronary Intervention on Occlusions After ST-Elevation Myocardial Infarction) trial evaluated whether patients with STEMI and concurrent CTO in a non-infarct-related artery benefit from additional percutaneous coronary intervention (PCI) of CTO shortly after primary PCI...
October 11, 2016: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/27677627/spontaneous-and-unruptured-chronic-intracranial-artery-dissection-high-resolution-magnetic-resonance-imaging-findings
#10
Seung Chai Jung, Ho Sung Kim, Choong-Gon Choi, Sang Joon Kim, Sun U Kwon, Dong-Wha Kang, Jong S Kim
PURPOSE: The aim of this article is to present high-resolution magnetic resonance imaging (HR-MRI) findings of chronic stage spontaneous and unruptured intracranial artery dissection (ICAD). MATERIAL AND METHODS: From March 2012 to April 2016 a total of 29 patients (15 male and14 female, age range 37-68 years) with chronic stage spontaneous and unruptured ICAD (vertebral artery 27, posterior inferior cerebellar artery 1 and middle cerebral artery 1) were retrospectively enrolled...
September 27, 2016: Clinical Neuroradiology
https://www.readbyqxmd.com/read/27659155/puncturing-plaques
#11
Trisha Roy, Garry Liu, Noor Shaikh, Andrew D Dueck, Graham A Wright
PURPOSE: To test and validate magnetic resonance imaging (MRI) sequences for peripheral artery lesion characterization and relate the MRI characteristics to the amount of force required for a guidewire to puncture peripheral chronic total occlusions (CTOs) as a surrogate for immediate failure of endovascular therapy. METHODS: Diseased superficial femoral, popliteal, and tibial artery segments containing 55 atherosclerotic lesions were excised from the amputated limbs of 7 patients with critical limb ischemia...
February 2017: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/27525609/bilateral-congenital-agenesis-of-lacrimal-glands-in-a-tunisian-family
#12
Ahmed Chebil, Yosra Falfoul, Rym Limaiem, Leila El Matri
BACKGROUND: Chronic corneal ulcers still pose etiological and therapeutic challenge. They are serious complications and often associated with poor functional prognosis. AIM: We report the case of a patient with bilateral and chronic corneal ulcer revealing a rare   familial   form   of   bilateral   agenesis   of   the   lacrimal   gland. CASES REPORT: A 39-year-old man was referred to our department for bilateralchronic and sterile ulcer...
January 2016: La Tunisie Médicale
https://www.readbyqxmd.com/read/26884768/interventricular-septal-hematoma-after-retrograde-intervention-for-a-chronic-total-occlusion-of-a-right-coronary-artery-echocardiographic-and-magnetic-resonance-imaging-diagnosis-and-follow-up
#13
Makoto Araki, Tadashi Murai, Yoshihisa Kanaji, Junji Matsuda, Eisuke Usui, Takayuki Niida, Sadamitsu Ichijo, Rikuta Hamaya, Tsunekazu Kakuta
The reverse CART technique provides the potential to modify the retrograde procedure by improving the controlled movement of the retrograde wire and improve the success rates of percutaneous coronary intervention (PCI) of chronic total occlusion (CTO). Development of interventricular hematoma is a rare complication of CTO PCI. A 63-year-old man with effort angina with a right coronary artery CTO lesion underwent PCI by retrograde approach from the LAD to a septal branch. A contrast "stain" was demonstrated surrounding the septal collateral channel used for the retrograde approach at the end of the procedure without symptom...
2016: Case Reports in Medicine
https://www.readbyqxmd.com/read/26465057/coronary-artery-total-occlusion-mr-angiographic-imaging-findings-and-success-rates-of-percutaneous-coronary-intervention-according-to-intraluminal-signal-intensity-patterns
#14
Sung Mok Kim, Jin-Ho Choi, Yeon Hyeon Choe
PURPOSE: To compare the success rates of percutaneous coronary interventions (PCIs) for chronic total occlusion (CTO) lesions according to the different signal intensity (SI) patterns seen at coronary magnetic resonance (MR) angiography. MATERIALS AND METHODS: Institutional review board approval was obtained, and all patients gave written informed consent. This study included 95 CTO lesions in 93 consecutive patients who underwent steady-state free-precession coronary MR angiography with a 1...
April 2016: Radiology
https://www.readbyqxmd.com/read/25892532/improvement-of-regional-and-global-left-ventricular-function-in-magnetic-resonance-imaging-after-recanalization-of-true-coronary-chronic-total-occlusions
#15
Philipp Chadid, Sinisa Markovic, Peter Bernhardt, Vinzenz Hombach, Wolfgang Rottbauer, Jochen Wöhrle
BACKGROUND: Successful recanalization of true chronic total occlusion (CTO) has been linked to a decrease in cardiac mortality. We evaluated the effect of CTO recanalization on LVEF and regional wall motion using paired cardiac magnetic resonance imaging (cMRI) studies. METHODS AND RESULTS: 43 patients underwent contrast enhanced cMRI prior to and 9 months after successful recanalization of a true CTO defined as thrombolysis in myocardial infarction flow 0 and duration of occlusion of more than 3 months...
June 2015: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/25809370/runoff-detected-by-magnetic-resonance-angiography-as-an-indicator-for-better-recanalization-outcomes-in-below-the-knee-chronic-total-occlusions-in-diabetic-patients
#16
COMPARATIVE STUDY
Yue-Qi Zhu, Jue Wang, Hua-Qiao Tan, Hai-Tao Lu, Fang Liu, Ying-Sheng Cheng, Li-Ming Wei, Pei-Lei Zhang, Jun-Gong Zhao
PURPOSE: To compare the feasibility and efficacy of recanalizing below-the-knee (BTK) chronic total occlusions (CTOs) between patients with good or poor distal runoff based on magnetic resonance angiography (MRA) scans. METHODS: Two hundred long-segment BTK CTOs in 171 limbs of 113 diabetic patients (58 men; mean age 69.8±1.9 years) were divided into good distal runoff (GDR: 119 lesions, 98 limbs) or poor distal runoff groups (PDR: 81 lesions, 73 limbs) based on baseline MRA findings...
April 2015: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/25440470/the-relationship-between-the-contralateral-collateral-supply-and-myocardial-viability-on-cardiovascular-magnetic-resonance-can-the-angiogram-predict-functional-recovery
#17
David P Ripley, Oliver E Gosling, Loke Bhatia, Charles R Peebles, Angela C Shore, Nick Curzen, Nick G Bellenger
BACKGROUND: A collateral circulation which supplies a myocardial territory, subtended by a chronic total occlusion (CTO), may be observed at invasive coronary angiography. The prognostic and protective role of such collateralisation is well demonstrated suggesting that a good collateral circulation may be a predictor of myocardial viability, but current evidence is discrepant. The aim of this study is to assess the relationship between collateralisation from the contralateral epicardial vessels and myocardial viability by cardiovascular magnetic resonance (CMR)...
December 15, 2014: International Journal of Cardiology
https://www.readbyqxmd.com/read/25192774/symptomatic-unruptured-isolated-middle-cerebral-artery-dissection-clinical-and-magnetic-resonance-imaging-features
#18
P H Gao, L Yang, G Wang, L Guo, X Liu, B Zhao
PURPOSE: Isolated middle cerebral artery dissection (MCAD) is a rare but important clinical entity. The purpose of this study is to demonstrate the clinical and magnetic resonance imaging (MRI) features of symptomatic unruptured isolated MCAD. METHODS: We retrospectively analyzed clinical characteristics and MRI features of eight consecutive ischemic stroke patients diagnosed with unruptured isolated MCAD over a 1-year period. RESULTS: All the patients had symptoms of cerebral infarction, whereas one patient was presented as transient ischemic attack...
March 2016: Clinical Neuroradiology
https://www.readbyqxmd.com/read/25173890/utility-of-high-resolution-electroanatomic-mapping-of-the-left-ventricle-using-a-multispline-basket-catheter-in-a-swine-model-of-chronic-myocardial-infarction
#19
Yasuaki Tanaka, Martin Genet, Lik Chuan Lee, Alastair J Martin, Richard Sievers, Edward P Gerstenfeld
BACKGROUND: Standard electroanatomic mapping systems use a single catheter to perform left ventricular substrate mapping. A new mapping system uses a 64-electrode mini-basket catheter to perform rapid automated acquisition of chamber geometry, voltage, and activation. OBJECTIVE: The aim of this study was to compare the accuracy of electroanatomic mapping using the basket catheter with that of mapping using a standard linear catheter in a swine model of chronic myocardial infarction...
January 2015: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/24664815/arterial-and-venous-thrombosis-of-the-cerebral-vasculature-in-gapo-syndrome
#20
Burcu Zeydan, Gulcin Benbir, Derya Uluduz, Birsen Ince, Baki Goksan, Civan Islak
A 37-year-old male, previously diagnosed with GAPO syndrome, was admitted to our hospital complaining of recurrent episodes of transient weakness and numbness in his left arm for 3 months, and severe headache with progressive dysphagia for 15 days. His cranial magnetic resonance (MR) images showed multiple ischemic foci in the bilateral periventricular and supraventricular white matter. Cerebral MR-angiography showed total occlusion of the right internal carotid artery and moderate stenosis in the left internal carotid...
May 2014: American Journal of Medical Genetics. Part A
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