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JACC. Cardiovascular Imaging

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https://www.readbyqxmd.com/read/29311033/lesion-specific-and-vessel-related-determinants-of-fractional-flow-reserve-beyond-coronary-artery-stenosis
#1
Amir Ahmadi, Jonathon Leipsic, Kristian A Øvrehus, Sara Gaur, Emilia Bagiella, Brian Ko, Damini Dey, Gina LaRocca, Jesper M Jensen, Hans Erik Bøtker, Stephan Achenbach, Bernard De Bruyne, Bjarne L Nørgaard, Jagat Narula
OBJECTIVES: The aims of the present study were: 1) to investigate the contribution of the extent of luminal stenosis and other lesion composition-related factors in predicting invasive fractional flow reserve (FFR); and 2) to explore the distribution of various combinations of morphological characteristics and the severity of stenosis among lesions demonstrating normal and abnormal FFR. BACKGROUND: In patients with stable ischemic heart disease, FFR-guided revascularization, as compared with medical therapy alone, is reported to improve outcomes...
January 2, 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29248663/definition-of-left-ventricular-segments-for-cardiac-magnetic-resonance-imaging
#2
LETTER
Breyoni S N Selvadurai, Valentina O Puntmann, David A Bluemke, Victor A Ferrari, Matthias G Friedrich, Christopher M Kramer, Raymond Y Kwong, Massimo Lombardi, Sanjay K Prasad, Frank E Rademakers, Alistair A Young, Raymond J Kim, Eike Nagel
No abstract text is available yet for this article.
December 9, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29248662/coronary-plaque-microstructure-and-composition-modify-optical-polarization-a-new-endogenous-contrast-mechanism-for-optical-frequency-domain-imaging
#3
Martin Villiger, Kenichiro Otsuka, Antonios Karanasos, Pallavi Doradla, Jian Ren, Norman Lippok, Milen Shishkov, Joost Daemen, Roberto Diletti, Robert-Jan van Geuns, Felix Zijlstra, Gijs van Soest, Peter Libby, Evelyn Regar, Seemantini K Nadkarni, Brett E Bouma
OBJECTIVES: This study aimed to evaluate whether polarimetry, performed using a modified optical frequency domain imaging (OFDI) system, can improve the assessment of histological features relevant to characterizing human coronary atherosclerosis. BACKGROUND: The microscopic structure and organization of the arterial wall influence the polarization of the infrared light used by OFDI. Modification of the OFDI apparatus, along with recently developed image reconstruction methods, permits polarimetric measurements simultaneously with conventional OFDI cross-sectional imaging through standard intravascular imaging catheters...
December 9, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29248641/improving-plaque-classification-with-optical-coherence-tomography
#4
EDITORIAL
Marc D Feldman, Thomas E Milner
No abstract text is available yet for this article.
December 9, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29248664/focal-fibrosis-in-the-endurance%C3%A2-athlete-s%C3%A2-heart-running-scarred-or-running-scared
#5
EDITORIAL
Aaron L Baggish
No abstract text is available yet for this article.
December 8, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29248661/mitral-valve-adaptation-to-isolated-annular-dilation-insights-into-the-mechanism-of-atrial-functional-mitral%C3%A2-regurgitation
#6
Dae-Hee Kim, Ran Heo, Mark D Handschumacher, Sahmin Lee, Yun-Sil Choi, Kyu-Ri Kim, Yewon Shin, Hong-Kyung Park, Joyce Bischoff, Elena Aikawa, Jong-Min Song, Duk-Hyun Kang, Robert A Levine, Jae-Kwan Song
OBJECTIVES: This study hypothesized that compensatory mitral leaflet area (MLA) adaptation occurs in patients with persistent atrial fibrillation (AF) without left ventricular (LV) dysfunction but has limitations that augment mitral regurgitation (MR). The study also explored whether asymmetrical annular dilation is matched by relative leaflet enlargement. BACKGROUND: Functional MR occurs in patients with AF and isolated annular dilation, but the relationship of MLA adaptation with annular area (AA) is unknown...
December 8, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29248660/myocardial-metabolism-in-endurance-exercise-induced-left-ventricular-hypertrophy
#7
LETTER
Meagan M Wasfy, Courtney Foster Bibbo, Marcel Brown, James R DeLuca, Francis Wang, Brant Berkstresser, Rory B Weiner, Gregory D Lewis, Adolph M Hutter, Michael H Picard, Marcelo F Di Carli, Aaron L Baggish
No abstract text is available yet for this article.
December 8, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29248659/intraluminal-assessment-of-coronary-arteries-with-ferumoxytol-enhanced-magnetic-resonance-angiography
#8
Matthew S Chin, Michael Steigner, Wenqing Yin, Raymond Y Kwong, Andrew M Siedlecki
No abstract text is available yet for this article.
December 8, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29248658/topographic-pattern-of-valve-calcification-a-new-determinant-of-disease-severity-in-aortic-valve%C3%A2-stenosis
#9
LETTER
Antonio de Santis, Flavio Tarasoutchi, Jose de Arimatéia B Araujo Filho, Marcelo C Vieira, Cesar H Nomura, Marcelo Katz, Guilherme S Spina, Roney O Sampaio, Tarso A D Accorsi, Vitor E E Rosa, João R C Fernandes, Jonathan Brown, Elazer R Edelman, Pedro A Lemos
No abstract text is available yet for this article.
December 8, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29248657/comprehensive-cardiac-ct-with-myocardial-perfusion-imaging-versus-functional-testing-in-suspected-coronary-artery-disease-the-multicenter-randomized-crescent-ii-trial
#10
Marisa Lubbers, Adriaan Coenen, Marcel Kofflard, Tobias Bruning, Bas Kietselaer, Tjebbe Galema, Marc Kock, Andre Niezen, Marco Das, Marco van Gent, Ewout-Jan van den Bos, Leon van Woerkens, Paul Musters, Suze Kooij, Fay Nous, Ricardo Budde, Miriam Hunink, Koen Nieman
OBJECTIVES: This study sought to assess the effectiveness, efficiency, and safety of a tiered, comprehensive cardiac computed tomography (CT) protocol in comparison with functional testing. BACKGROUND: Although CT angiography accurately rules out coronary artery disease (CAD), incorporation of CT myocardial perfusion imaging as part of a tiered diagnostic approach could improve the clinical value and efficiency of cardiac CT in the diagnostic work-up of patients with angina pectoris...
December 8, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29248656/myocardial-fibrosis-in-competitive-triathletes-detected-by-contrast-enhanced-cmr-correlates-with%C3%A2-exercise-induced-hypertension-and%C3%A2-competition-history
#11
Enver Tahir, Jitka Starekova, Kai Muellerleile, Alexandra von Stritzky, Julia Münch, Maxim Avanesov, Julius M Weinrich, Christian Stehning, Sebastian Bohnen, Ulf K Radunski, Eric Freiwald, Stefan Blankenberg, Gerhard Adam, Axel Pressler, Monica Patten, Gunnar K Lund
OBJECTIVES: This study analyzed the presence of myocardial fibrosis detected by late gadolinium-enhancement (LGE) cardiac magnetic resonance (CMR) in correlation with the performance of competitive triathletes objectified by an exercise test and individual competition history. BACKGROUND: Myocardial fibrosis detected by LGE CMR has been reported to occur in 0% to 50% of asymptomatic athletes. However, the cause and mechanisms of myocardial fibrosis are unclear. METHODS: Eighty-three asymptomatic triathletes undergoing >10 training h per week (43 ± 10 years of age; 65% male) and 36 sedentary controls were studied by using LGE and extracellular volume (ECV) CMR...
December 8, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29248655/dark-blood-delayed-enhancement-cardiac%C3%A2-magnetic-resonance-of-myocardial%C3%A2-infarction
#12
Han W Kim, Wolfgang G Rehwald, Elizabeth R Jenista, David C Wendell, Peter Filev, Lowie van Assche, Christoph J Jensen, Michele A Parker, Enn-Ling Chen, Anna Lisa C Crowley, Igor Klem, Robert M Judd, Raymond J Kim
OBJECTIVES: This study introduced and validated a novel flow-independent delayed enhancement technique that shows hyperenhanced myocardium while simultaneously suppressing blood-pool signal. BACKGROUND: The diagnosis and assessment of myocardial infarction (MI) is crucial in determining clinical management and prognosis. Although delayed enhancement cardiac magnetic resonance (DE-CMR) is an in vivo reference standard for imaging MI, an important limitation is poor delineation between hyperenhanced myocardium and bright LV cavity blood-pool, which may cause many infarcts to become invisible...
December 8, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29248654/value-of-myocardial-perfusion-assessment-with-coronary-computed-tomography-angiography-in-patients-with-recent-acute-onset-chest-pain
#13
Mathias H Sørgaard, Jesper J Linde, J Tobias Kühl, Henning Kelbæk, Jens D Hove, Gitte G Fornitz, Tem B S Jørgensen, Merete Heitmann, Charlotte Kragelund, Thomas F Hansen, Jawdat Abdulla, Thomas Engstrøm, Jan S Jensen, Yaffah T Wiegandt, Dan E Høfsten, Lars V Køber, Klaus F Kofoed
OBJECTIVES: The authors sought to perform a randomized controlled trial to evaluate the clinical efficacy of combined examination with coronary computed tomography angiography (CTA) and computed tomography perfusion imaging (CTP) compared to coronary CTA alone. BACKGROUND: Stress myocardial CTP may increase diagnostic specificity when added to coronary CTA in patients suspected of having ischemic heart disease. METHODS: Patients recently hospitalized for acute-onset chest pain, in whom acute coronary syndrome had been ruled out by normal electrocardiograms, normal troponin levels, and relief of symptoms, and who had a clinical indication for outpatient noninvasive testing, were screened for inclusion in the CATCH-2 (CArdiac cT in the treatment of acute CHest pain 2) trial (NCT02014311)...
December 8, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29248653/hyperpolarized-1-4-13c2-fumarate-enables-magnetic-resonance-based-imaging-of-myocardial-necrosis
#14
Jack J Miller, Angus Z Lau, Per Mose Nielsen, Giles McMullen-Klein, Andrew J Lewis, Nichlas Riise Jespersen, Vicky Ball, Ferdia A Gallagher, Carolyn A Carr, Christoffer Laustsen, Hans Erik Bøtker, Damian J Tyler, Marie A Schroeder
OBJECTIVES: The aim of this study was to determine if hyperpolarized [1,4-13C2]malate imaging could measure cardiomyocyte necrosis after myocardial infarction (MI). BACKGROUND: MI is defined by an acute burst of cellular necrosis and the subsequent cascade of structural and functional adaptations. Quantifying necrosis in the clinic after MI remains challenging. Magnetic resonance-based detection of the conversion of hyperpolarized [1,4-13C2]fumarate to [1,4-13C2]malate, enabled by disrupted cell membrane integrity, has measured cellular necrosis in vivo in other tissue types...
December 8, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29248652/high-frame-rate-contrast-echocardiography-in-human-demonstration
#15
LETTER
Matthieu E G Toulemonde, Richard Corbett, Virginie Papadopoulou, Navtej Chahal, Yuanwei Li, Chee Hau Leow, David O Cosgrove, Robert J Eckersley, Neill Duncan, Roxy Senior, Meng-Xing Tang
No abstract text is available yet for this article.
December 8, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29248651/from-lab-to-life-cardiac-biomarker-measurement-in-the-intact-heart-by%C3%A2-means%C3%A2-of%C3%A2-hyperpolarized13c-carbon-cmr
#16
EDITORIAL
Juerg Schwitter
No abstract text is available yet for this article.
December 8, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29248650/is-global-longitudinal-strain-a-superior-parameter-for-predicting-outcome-after-myocardial-infarction
#17
EDITORIAL
Frank Rademakers, Eike Nagel
No abstract text is available yet for this article.
December 8, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29248649/prognostic-value-of-strain-by-tissue-tracking-cardiac-magnetic-resonance-after-st-segment-elevation-myocardial%C3%A2-infarction
#18
Jose Gavara, Jose F Rodriguez-Palomares, Filipa Valente, Jose V Monmeneu, Maria P Lopez-Lereu, Clara Bonanad, Ignacio Ferreira-Gonzalez, Bruno Garcia Del Blanco, Julian Rodriguez-Garcia, Maria Mutuberria, Elena de Dios, Cesar Rios-Navarro, Nerea Perez-Sole, Paolo Racugno, Ana Paya, Gema Minana, Joaquim Canoves, Mauricio Pellicer, Francisco J Lopez-Fornas, Jose Barrabes, Arturo Evangelista, Julio Nunez, Francisco J Chorro, David Garcia-Dorado, Vicente Bodi
OBJECTIVES: The aim of this study was to evaluate the prognostic value of strain as assessed by tissue tracking (TT) cardiac magnetic resonance (CMR) soon after ST-segment elevation myocardial infarction (STEMI). BACKGROUND: The prognostic value of myocardial strain as assessed post-STEMI by TT-CMR is unknown. METHODS: The authors studied the prognostic value of TT-CMR in 323 patients who underwent CMR 1 week post-STEMI. Global (average of peak segmental values [%]) and segmental (number of altered segments) longitudinal (LS), circumferential, and radial strain were assessed using TT-CMR...
December 8, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29248648/atrial-fibrillation-begets-mitral-regurgitation-or-is-it-vice-versa
#19
EDITORIAL
James D Thomas, Sasan R Raissi
No abstract text is available yet for this article.
December 8, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29248647/emerging-sex-differences-in-aortic%C3%A2-stenosis
#20
EDITORIAL
Marc R Dweck, Jacek Kwiecinski
No abstract text is available yet for this article.
December 8, 2017: JACC. Cardiovascular Imaging
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