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Cardiac MRI

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https://www.readbyqxmd.com/read/29053451/spatially-resolved-mr-compatible-doppler-ultrasound-proof-of-concept-for-triggering-of-diagnostic-quality-cardiovascular-mri-for-function-and-flow-quantification-at-3t
#1
Lindsey A Crowe, Gibran Manasseh, Aneta Chmielewski, Anne-Lise Hachulla, Daniel Speicher, Andreas Greiser, Hajo Muller, Thomas De Perrot, Jean-Paul Vallee, Rares Salomir
OBJECTIVES: We demonstrate the use of a Magnetic-Resonance (MR)-compatible ultrasound (US) imaging probe using spatially-resolved Doppler for diagnostic quality cardiovascular MR imaging as an initial step towards hybrid US/MR fetal imaging. METHODS: A newly developed technology for a dedicated MR-compatible phased array ultrasound-imaging probe acquired pulsed color Doppler carotid images, which were converted in near-real time to a trigger signal for cardiac cine and flow quantification MRI...
October 17, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/29052019/image-quality-improvements-using-adaptive-statistical-iterative-reconstruction-for-evaluating-chronic-myocardial-infarction-using-iodine-density-images-with-spectral-ct
#2
Junichi Kishimoto, Yasutoshi Ohta, Shinichiro Kitao, Tomomi Watanabe, Toshihide Ogawa
Single-source dual-energy CT (ssDECT) allows the reconstruction of iodine density images (IDIs) from projection based computing. We hypothesized that adding adaptive statistical iterative reconstruction (ASiR) could improve image quality. The aim of our study was to evaluate the effect and determine the optimal blend percentages of ASiR for IDI of myocardial late iodine enhancement (LIE) in the evaluation of chronic myocardial infarction using ssDECT. A total of 28 patients underwent cardiac LIE using a ssDECT scanner...
October 19, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29051544/estimating-prognosis-in-patients-with-acute-myocardial-infarction-using-personalized-computational-heart-models
#3
Hao Gao, Kenneth Mangion, David Carrick, Dirk Husmeier, Xiaoyu Luo, Colin Berry
Biomechanical computational models have potential prognostic utility in patients after an acute ST-segment-elevation myocardial infarction (STEMI). In a proof-of-concept study, we defined two groups (1) an acute STEMI group (n = 6, 83% male, age 54 ± 12 years) complicated by left ventricular (LV) systolic dysfunction; (2) an age- and sex- matched hyper-control group (n = 6, 83% male, age 46 ± 14 years), no prior history of cardiovascular disease and normal systolic blood pressure (SBP < 130 mmHg)...
October 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29045977/-clinical-and-genetic-characteristics-of-williams-beuren-syndrome-2-cases-report
#4
S Q Wang, Z X Yang, H Li
To explore the clinical and genetic characteristics of Williams-Beuren syndrome (WBS) and to raise awareness of the disease. The characteristics of clinical manifestations, personal history, cardiac ultrasound, brain magnetic resonance imaging (MRI), electroencephalogram (EEG) and chromosome detection results of two cases with WBS were analyzed. The two patients were both male and the age was 11 months and 1 day, and 9 months and 9 days, respectively. They both suffered from cardiovascular malformation: case one presented supravalvular aortic stenosis, and case two showed atrial septal defect and patent ductus arteriosus...
October 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/29045806/safety-of-magnetic-resonance-imaging-in-patients-with-legacy-pacemakers-and-defibrillators-and-abandoned-leads
#5
Deepak Padmanabhan, Danesh K Kella, Ramila Mehta, Suraj Kapa, Deshmukh Abhishek, Siva Mulpuru, Allan S Jaffe, Joel P Felmlee, Mary L Jondal, Connie M Dalzell, Samuel J Asirvatham, Yong-Mei Cha, Robert E Watson, Paul A Friedman
BACKGROUND: During magnetic resonance imaging (MRI), abandoned leads may act as antennae that result in tissue heating and arrhythmia induction. OBJECTIVES: To assess the safety of MRI in patients with abandoned leads, with the addition of cardiac troponin T (CTnT) assessment to screen for myocardial damage. METHODS: We reviewed our prospectively collected database of patients with CIEDs undergoing MRI between 2008-2017 at Mayo Clinic, Rochester, Minnesota and selected patients who had abandoned leads...
October 15, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29044976/transcoronary-pacing-to-assess-myocardial-viability-prior-to-percutaneous-coronary-intervention-pilot-study-to-assess-feasibility
#6
James O'Neill, Andrew J Hogarth, Ian Pearson, Hannah Law, Robert Bowes, Ananth Kidambi, Stephen Wheatcroft, U Mohanaraj Sivananthan, Muzahir H Tayebjee
BACKGROUND: The assessment of myocardial viability is crucial before percutaneous coronary intervention (PCI) is carried out to ensure that the patient will gain benefit. Trans-coronary pacing (TCP) has previously been used to pace myocardium but may also provide information on myocardial viability. METHODS: Patients with a single, significant coronary stenosis requiring PCI were recruited. They underwent a cardiac MRI to assess myocardial viability. Prior to PCI, a coronary guidewire was used to measure pacing threshold, impedance, and R-wave amplitude in different myocardial segments to determine any association between the electrical parameters and myocardial viability...
October 16, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29043395/measuring-flow-hemodynamic-indices-and-oxygen-consumption-in-children-with-pulmonary-hypertension-a-comparison-of-catheterization-and-phase-contrast-mri
#7
Michal Schäfer, Uyen Truong, Lorna P Browne, Gareth J Morgan, Michael Ross, Richard Ing, Kendall S Hunter, Vitaly O Kheyfets, Steven H Abman, D Dunbar Ivy, Neil Wilson
We sought to compare pulmonary flow hemodynamic indices obtained by Fick and thermodilution catheterization techniques with phase-contrast MRI (PC-MRI) in children with diverse etiologies of pulmonary arterial hypertension (PAH). Calculation of pulmonary flow ([Formula: see text]) using the Fick principle in most catheter laboratories relies on an estimate of oxygen consumption which may limit its reliability. Flow hemodynamic indices acquired from thirty patients with PAH who underwent successful same-day PC-MRI and catheterization were evaluated for absolute and percent bias...
October 17, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/29037957/magnetic-resonance-imaging-in-people-with-cardiac-implantable-electronic-devices-a-population-based-cohort-study
#8
Marianne H Gillam, Maria C S Inacio, Nicole L Pratt, Sepehr Shakib, Elizabeth E Roughead
Magnetic resonance imaging (MRI) is a widely used diagnostic tool with great benefits but has been considered contraindicated in people with cardiac implantable electronic devices (CIED). We investigated the occurrence of MRI in people with CIEDs and associated adverse events in a national cohort. Of 17,848 people included, 56 (0.3%) had at least one MRI; 16 of 16,102 (0.1%) with MRI non-compatible CIEDs and 40 of 1746 (2%) with MRI compatible CIEDs. Following MRI exposure, hospitalisations for potential serious adverse events were rare...
October 9, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/29035991/myocardial-perfusion-spect-and-cardiac-mr-correlative-imaging
#9
Ashley E Prosper, Patrick M Colletti
An institutional review board-approved retrospective review of 55 patients who received cardiac MRI within 1 year of myocardial SPECT was performed. Forty-nine demonstrated myocardial infarction by MRI. MRI and SPECT agreed in all but 1 case, where SPECT preceded MRI by 97 days. Three cases are presented here: 2 demonstrating congruent MRI and SPECT changes in a vascular distribution status post infarction and a third with a nonvascular pattern of abnormalities related to left ventricular aneurysm in cardiac sarcoidosis...
October 13, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/29034496/clinical-impact-of-the-microembolic-signal-burden-during-catheter-ablation-for-atrial-fibrillation-just-a-lot-of-noise
#10
Christian von Bary, Thomas Deneke, Thomas Arentz, Anja Schade, Heiko Lehrmann, Susanne Schwab-Malek, Sabine Fredersdorf, Dobri Baldaranov, Lars Maier, Felix Schlachetzki
OBJECTIVES: Microembolic signal detection by transcranial Doppler ultrasonography may be considered a surrogate for cerebral events during invasive cardiac procedures. However, the impact of the microembolic signal count during pulmonary vein isolation on the clinical outcome is not well evaluated. We investigated the effect of the microembolic signal count on the occurrence of new silent cerebral embolism measured by diffusion-weighted imaging (DWI)-magnetic resonance imaging (MRI), changes in neuropsychological testing, and the occurrence of clinical events during long-term follow-up after pulmonary vein isolation...
October 16, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29034164/aberrant-brain-functional-connectivity-in-newborns-with-congenital-heart-disease-before-cardiac-surgery
#11
Josepheen De Asis-Cruz, Mary T Donofrio, Gilbert Vezina, Catherine Limperopoulos
Newborns with congenital heart disease (CHD) requiring open heart surgery are at increased risk for neurodevelopmental disabilities. Recent quantitative MRI studies have reported disrupted growth, microstructure, and metabolism in fetuses and newborns with complex CHD. To date, no study has examined whether functional brain connectivity is altered in this high-risk population after birth, before surgery. Our objective was to compare whole-brain functional connectivity of resting state networks in healthy, term newborns (n = 82) and in term neonates with CHD before surgery (n = 30) using graph theory and network-based statistics...
2018: NeuroImage: Clinical
https://www.readbyqxmd.com/read/29033512/heart-rate-recovery-as-a-novel-test-for-predicting-cardiac-involvement-in-beta-thalassemia-major
#12
Selcuk Kucukseymen, Isa Oner Yuksel, Goksel Cagirci, Erkan Koklu, Volkan Karakus, Serkan Cay, Gorkem Kus, Erdal Kurtoglu, Sakir Arslan
BACKGROUND: Abnormal heart rate recovery (HRR) is predictive of cardiac mortality. Autonomic abnormalities in beta-thalassemia major (TM) patients have been reported in previous studies. However, the importance of low HRR in exercise stress test in TM patients has not yet been ascertained. Therefore, this study will be the first of its kind in the literature. METHODS: Exercise stress test was performed on 56 TM patients who were being treated at the Thalassemia Center of our hospital, along with 46 non-TM iron deficiency anemia (IDA) patients as a control group...
July 2017: Acta Cardiologica Sinica
https://www.readbyqxmd.com/read/29030363/isolated-left-ventricular-non-compaction-lvnc-and-recurrent-strokes-to-anticoagulate-or-not-to-anticoagulate-that-is-the-question
#13
Ahmed Subahi, Abubaker A I Hassan, Hossam Abubakar, Walid Ibrahim
Isolated left ventricular non-compaction (LVNC) is an uncommon primary cardiomyopathy associated with significant risk of thromboembolic stroke. We report a case of a 69-year-old man with a medical history of ischaemic stroke who presented with a stroke for the second time, and during stroke workup transthoracic echo was suggestive of increased apical trabeculation. He underwent cardiac MRI study to evaluate the left ventricular structure, which revealed LVNC cardiomyopathy, which we believe is the main culprit of his recurrent strokes...
October 13, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29026416/right-ventricular-thrombosis-as-a-manifestation-of-beh%C3%A3-et-s-syndrome
#14
Payam Ebrahimifar, Javad Shahabi
BACKGROUND: Behçet's disease (BD) is a rare condition with a classic triad of oral and genital ulceration and eye disease. Cardiovascular complication is a rare finding in BD. CASE REPORT: In this report, we present a seventeen years old patient with a history of fever for 20 days, who developed a clot in right ventricle (RV). Cardiac magnetic resonance imaging (MRI) and echocardiography demonstrated a thrombosis in RV and a thoracic multi detector computed tomographic image showed pulmonary thromboembolism (PTE) in patient...
March 2017: ARYA Atherosclerosis
https://www.readbyqxmd.com/read/29025779/scorpion-bite-induced-ischaemic-stroke
#15
Rakesh Reddy C, Nandakishore Bompelli, Vikram Khardenavis, Anirudda Deshpande
We report a 54-year-old woman with scorpion bite. After 3 hours of admission, the patient developed sudden onset tachycardia with hypotension. Cardiac evaluation showed raised creatine kinase MB isoenzyme was elevated; ECG and two-dimensional echocardiography findings were suggestive of myocarditis. Subsequently, she developed transient ventricular tachycardia before developing abrupt onset, right hemiplegia, global aphasia and progressive worsening of sensorium 12 hours after the bite. MRI of brain revealed massive left middle cerebral artery (MCA) territory infarct...
October 11, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29025545/constrictive-pericarditis
#16
REVIEW
Terrence D Welch, Jae K Oh
Constrictive pericarditis is a potentially treatable cause of diastolic heart failure that arises because a diseased, inelastic pericardium restricts ventricular diastolic expansion. Affected patients present with heart failure with predominant right-sided symptoms and signs. The key to diagnosis is identification of the unique hemodynamic properties associated with constriction: dissociation of intrathoracic and intracardiac pressures and enhanced ventricular interaction. Comprehensive echocardiography with Doppler imaging is useful, but invasive hemodynamic assessment and cross-sectional imaging may be required for confirmation...
November 2017: Cardiology Clinics
https://www.readbyqxmd.com/read/29024404/removal-of-sacral-nerve-stimulation-devices-for-magnetic-resonance-imaging-what-happens-next
#17
Jessica C Lloyd, Bradley C Gill, Javier Pizarro-Berdichevsky, Howard B Goldman
INTRODUCTION: Sacral neuromodulation (SNM) devices (Medtronic, Minneapolis, MN, USA) are not approved to undergo magnetic resonance imaging (MRI) of sites other than the head. When MRIs are required, devices are often removed prior to imaging. We reviewed the prevalence of device removal for MRI at a large academic institution and the subsequent clinical course of these patients. METHODS: A retrospective review of all SNM explants from 2009-2015 was performed. Cases explanted for MRI were analyzed to collect demographics, clinical characteristics, and postremoval management...
October 11, 2017: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/29023983/age-vascular-health-and-alzheimer-s-disease-biomarkers-in-an-elderly-sample
#18
Prashanthi Vemuri, Timothy G Lesnick, Scott A Przybelski, David S Knopman, Val J Lowe, Jonathan Graff-Radford, Rosebud O Roberts, Michelle M Mielke, Mary M Machulda, Ronald C Petersen, Clifford R Jack
OBJECTIVE: To investigate the associations between age, vascular health, and Alzheimer's disease (AD) imaging biomarkers in an elderly sample. METHODS: We identified 430 individuals along the cognitive continuum aged>60 years with amyloid-PET, Tau-PET, and MRI scans from the population-based Mayo Clinic Study of Aging. A subset of 329 individuals had FDG-PET. We ascertained presently existing cardiovascular and metabolic conditions (CMC) from healthcare records and used the summation of presence/absence of hypertension, hyperlipidemia, cardiac-arrhythmias, coronary artery disease, congestive heart failure, diabetes mellitus, and stroke as a surrogate for vascular health...
October 10, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/29021849/feasibility-safety-and-potential-demand-of-emergent-brain-magnetic-resonance-imaging-of-patients-with-cardiac-implantable-electronic-devices
#19
Maki Ono, Makoto Suzuki, Mitsuaki Isobe
BACKGROUND: The feasibility, safety, and potential demand of emergent magnetic resonance imaging (MRI) of patients with a cardiac implantable electronic device (CIED) in emergency situations are unknown. METHODS: We retrospectively compared emergent and scheduled MRI orders for patients with CIEDs at Kameda General Hospital, a tertiary hospital in Japan, from October 2012 to September 2016. RESULTS: We identified 11 emergent MRI orders via the emergency room and 38 scheduled MRI orders...
October 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/29021848/scar-characteristics-derived-from-two-and-three-dimensional-reconstructions-of-cardiac-contrast-enhanced-magnetic-resonance-images-relationship-to-ventricular-tachycardia-inducibility-and-ablation-success
#20
Kazumasa Sonoda, Yasuo Okumura, Ichiro Watanabe, Koichi Nagashima, Hiroaki Mano, Rikitake Kogawa, Naoko Yamaguchi, Keiko Takahashi, Kazuki Iso, Kimie Ohkubo, Toshiko Nakai, Satoshi Kunimoto, Atsushi Hirayama
BACKGROUND: The relationship between cardiac contrast-enhanced magnetic resonance imaging (CE-MRI)-derived scar characteristics and substrate for ventricular tachycardia (VT) in patients with structural heart disease (SHD) has not been fully investigated. METHODS: This study included 51 patients (mean age, 63.3±15.1 years) who underwent CE-MRI with SHD and VT induction testing before ablation. Late gadolinium-enhanced (LGE) regions on MRI slices were quantified by thresholding techniques...
October 2017: Journal of Arrhythmia
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