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International Journal of Cardiovascular Imaging

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https://www.readbyqxmd.com/read/30341672/post-systolic-shortening-normal-values-and-association-with-validated-echocardiographic-and-invasive-measures-of-cardiac-function
#1
Philip Brainin, Sofie Reumert Biering-Sørensen, Rasmus Møgelvang, Martina Chantal de Knegt, Flemming Javier Olsen, Søren Galatius, Gunnar Hilmar Gislason, Jan Skov Jensen, Tor Biering-Sørensen
Post-systolic shortening (PSS) does not contribute to the ejection of blood and may inhibit diastolic filling. We determined normal values of PSS in healthy subjects and investigated associations with echocardiographic and invasive measures of systolic and diastolic function. We prospectively analyzed participants from the general population (n = 620, mean age 47 ± 14 years) with no cardiovascular disease. Participants underwent echocardiography, including speckle tracking assessment of the post-systolic index (PSI), strain and time...
October 19, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/30341671/an-unusual-cause-of-pulmonary-outflow-obstruction-igg4-deposition-disease-mri-observations
#2
Karthik Gadabanahalli, Venkatraman Bhat, P V Suresh, N C Gnanadev
No abstract text is available yet for this article.
October 19, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/30341670/assessment-of-factors-associated-with-measurability-of-fractional-flow-reserve-derived-from-coronary-computed-tomography-angiography-in-type-2-diabetic-patients-with-intermediate-coronary-artery-stenosis
#3
Tsuyoshi Nozue, Takeshi Takamura, Kazuki Fukui, Kiyoshi Hibi, Satoru Kishi, Ichiro Michishita
Recently, fractional flow reserve (FFR) derived from coronary computed tomography angiography (CCTA) (FFRCT ) has been developed. However, FFRCT cannot be calculated for all patients from CCTA datasets. The purpose of the present study, therefore, was to evaluate the predictors that results in cases being inappropriate for FFRCT processing. This study was a sub-analysis of the TRACT trial, from which 50 patients were divided into 2 groups according to FFRCT measurability (measurable [group M] or not measurable [group N]) using CCTA examination at baseline...
October 19, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/30341669/left-atrial-longitudinal-strain-in-dilated-cardiomyopathy-patients-is-there-a-discrimination-threshold-for-atrial-fibrillation
#4
Jacek Kurzawski, Agnieszka Janion-Sadowska, Andrzej Gackowski, Marianna Janion, Łukasz Zandecki, Magdalena Chrapek, Marcin Sadowski
To determine the left atrial longitudinal strain discrimination threshold of atrial fibrillation (AF) in patients with dilated cardiomyopathy (DCM). A total of 100 DCM patients and LVEF < 25% were included. Of them, 50 had sinus rhythm (SR), and 50 had AF. Patients with significant valvular disease, cardiac pacemakers and prosthetic valves were excluded. Speckle tracking echocardiography was performed to visualize the inferior and lateral walls of the left atrium as well as the interatrial septum. The Q-Analysis software was used to assess left atrial contractile strain (εCT ) during the atrial systole and left atrial conduit strain (εCD ) during the atrial filling...
October 19, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/30334229/epicardial-fat-amount-is-associated-with-the-magnitude-of-left-ventricular-remodeling-in-aortic-stenosis
#5
Augustin Coisne, Sandro Ninni, Staniel Ortmans, Laurent Davin, Kevin Kasprzak, Benjamin Longère, Claire Seunes, Amandine Coppin, Stéphanie Mouton, Hélène Ridon, Cedric Klein, Brieuc Noirot-Cosson, Bart Staels, Patrizio Lancellotti, David Montaigne, François Pontana
Both genetic and environmental factors interact to control left ventricular (LV) remodeling in the context of aortic stenosis (AS). Epicardial adipose tissue (EAT) is a specific visceral adipose tissue with paracrine properties in close contact with the myocardium. We sought to assess determinants of EAT amount and its association with the magnitude and pattern of LV remodeling in patients suffering from severe AS. Between January 2014 and September 2017, we prospectively explored consecutive patients referred to our Heart Valve Center for SAVR presenting with severe AS and normal left ventricular ejection fraction (> 50%)...
October 17, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/30334228/moving-into-the-next-era-of-pet-myocardial-perfusion-imaging-introduction-of-novel-18-f-labeled-tracers
#6
REVIEW
Rudolf A Werner, Xinyu Chen, Steven P Rowe, Constantin Lapa, Mehrbod S Javadi, Takahiro Higuchi
The heart failure epidemic continues to rise with coronary artery disease as one of its main causes. Novel concepts for risk stratification to guide the referring cardiologist towards revascularization procedures are of significant value. Myocardial perfusion imaging using single-photon emission computed tomography (SPECT) agents has demonstrated high accuracy for the detection of clinically relevant stenoses. With positron emission tomography (PET) becoming more widely available, mainly due to its diagnostic performance in oncology, perfusion imaging with that modality is more practical than in the past and overcomes existing limitations of SPECT MPI...
October 17, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/30328027/relationships-of-high-cardiac-output-with-ventricular-morphology-myocardial-energetics-and-energy-costs-in-hemodialysis-patients-with-preserved-ejection-fraction
#7
Tomonari Harada, Masaru Obokata, Koji Kurosawa, Hidemi Sorimachi, Kuniko Yoshida, Hideki Ishida, Kyoko Ito, Tetsuya Ogawa, Yoshitaka Ando, Masahiko Kurabayashi, Kazuaki Negishi
Hemodialysis patients have conditions that increase cardiac output (CO), including arteriovenous fistula, fluid retention, vasodilator use, and anemia. We sought to determine the relationships between these factors and CO and to evaluate the effects of the high-output states on ventricular morphology, function, and myocardial energetics in hemodialysis patients, using noninvasive load-insensitive indices. Cardiovascular function was assessed in hemodialysis patients with high output [ejection fraction ≥ 50%, cardiac index (CI) > 3...
October 16, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/30328026/impact-of-tissue-protrusion-after-coronary-stenting-in-patients-with-st-segment-elevation-myocardial-infarction
#8
Yoshiyuki Okuya, Yuichi Saito, Yoshiaki Sakai, Iwao Ishibashi, Yoshio Kobayashi
Clinical impact of tissue protrusion (TP) after coronary stenting is still controversial, especially in patients with ST-segment elevation myocardial infarction (STEMI). A total of 104 STEMI patients without previous MI who underwent primary percutaneous coronary intervention (PCI) under intravascular ultrasound (IVUS)-guidance were included. Post-stenting grayscale IVUS analysis was performed, and the patients were classified according to the presence or absence of post-stenting TP on IVUS. Coronary angiography and single-photon emission computed tomography myocardial perfusion imaging (SPECT MPI) with 99m Tc tetrofosmin were analyzed...
October 16, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/30298426/congenital-pseudoaneurysm-of-the-mitral-aortic-intervalvular-fibrosa-with-a-5-years-follow-up
#9
A Del Pasqua, Claudia Esposito, Priscilla Milewski, Paolo Ciliberti, Marcello Chinali, Aurelio Secinaro, Gabriele Rinelli
No abstract text is available yet for this article.
October 8, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/30293193/successful-radiofrequency-catheter-ablation-of-atrial-fibrillation-is-associated-with-improvement-in-left-ventricular-energy-loss-and-mechanics-abnormalities
#10
Mingjie Lin, Li Hao, Yuan Cao, Fei Xie, Wenqiang Han, Bing Rong, Yachao Zhao, Jingquan Zhong
Dissipative energy loss (EL), an index of inefficient blood flow, has not been studied in patients with atrial fibrillation (AF). We therefore assessed the effect of AF and of successful catheter ablation on left ventricular (LV) EL and global longitudinal strain (GLS) to explore the effect of inefficient blood flow on LV remodeling. In 53 patients undergoing catheter ablation for AF (AF group), LV EL (in mW/m) was evaluated by vector flow mapping (VFM) during systole (ELsys), early diastole (ELed) and atrial contraction phase (ELac), and GLS was calculated by two-dimensional tissue tracking (2DTT)...
October 6, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/30288665/flow-convergence-visualized-in-mitral-regurgitation-with-spontaneous-echo-contrast
#11
Aaron A H Smith, Michael Megaly, Melissa Madsen, Amy Waska, Bradley A Bart, Charles A Herzog
No abstract text is available yet for this article.
October 4, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/30284642/low-ct-temporal-sampling-rates-result-in-a-substantial-underestimation-of-myocardial-blood-flow-measurements
#12
Marly van Assen, Gert Jan Pelgrim, Emmy Slager, Sjoerd van Tuijl, U Joseph Schoepf, Rozemarijn Vliegenthart, Matthijs Oudkerk
The purpose of this study was to evaluate the effect of temporal sampling rate in dynamic CT myocardial perfusion imaging (CTMPI) on myocardial blood flow (MBF). Dynamic perfusion CT underestimates myocardial blood flow compared to PET and SPECT values. For accurate quantitative analysis of myocardial perfusion with dynamic perfusion CT a stable calibrated HU measurement of MBF is essential. Three porcine hearts were perfused using an ex-vivo Langendorff model. Hemodynamic parameters were monitored. Dynamic CTMPI was performed using third generation dual source CT at 70 kVp and 230-350 mAs/rot in electrocardiography(ECG)-triggered shuttle-mode (sampling rate, 1 acquisition every 2-3 s; z-range, 10...
October 4, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/30284138/correlation-of-ffr-derived-from-ct-and-stress-perfusion-cmr-with-invasive-ffr-in-intermediate-grade-coronary-artery-stenosis
#13
Olivier Ghekiere, Jurgen Bielen, Jonathon Leipsic, Willem Dewilde, Isabelle Mancini, Dominic Hansen, Paul Dendale, Alain Nchimi
Only one-third of intermediate-grade coronary artery stenosis (i.e. 40-70% diameter narrowing) causes myocardial ischemia, requiring most often additional invasive work-up with invasive fractional flow reserve (FFR). To evaluate the correlations between FFR estimates derived from computed tomography (FFRCT ) and adenosine perfusion cardiac magnetic resonance (CMR) with invasive FFR in intermediate-grade stenosis. Thirty-seven patients (mean age 61 ± 9 years; 25 men) who underwent adenosine perfusion CMR, quantitative coronary angiography and FFR in the work-up for intermediate-grade stenoses (n = 39) diagnosed at coronary CT angiography were retrospectively evaluated...
October 3, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/30269294/how-should-we-determine-normal-echocardiographic-right-ventricle-function-reference-values-in-pediatrics
#14
Charlene Bredy, Camille Soulatges, Sophie Guillaumont, Marie Vincenti, Gregoire De La Villeon, Thibault Mura, Pascal Amedro
Several models have been used to establish pediatric Z-scores for echocardiographic right ventricle (RV) variables. This study aimed to determine the most appropriate mathematical model for RV function reference values in pediatrics. Prospective cross-sectional study among 314 healthy children ages 2 days to 18 years (46% female, 88 infants, 26 neonates, 226 children). RV parameters (S', E', A' waves, TEI index, TAPSE) were modelized with four explanatory variables: age, height, weight and body surface area...
September 29, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/30267168/myocardial-bridging-of-the-left-anterior-descending-coronary-artery-is-associated-with-reduced-myocardial-perfusion-reserve-a-13-n-ammonia-pet-study
#15
Andrea G Monroy-Gonzalez, Erick Alexanderson-Rosas, Niek H J Prakken, Luis E Juarez-Orozco, Lourdes Walls-Laguarda, Enrique A Berrios-Barcenas, Aloha Meave-Gonzalez, Jan C Groot, Riemer H J A Slart, Rene A Tio
Myocardial Bridging (MB) refers to the band of myocardium that abnormally overlies a segment of a coronary artery. This paper quantitatively evaluates the influence of MB of the left anterior descending artery (LAD) on myocardial perfusion of the entire left ventricle. We studied 131 consecutive patients who underwent hybrid rest/stress 13 N-ammonia positron emission tomography (PET) and coronary computed tomography angiography (CCTA) due to suspected myocardial ischemia. Patients with previous myocardial infarction and/or significant coronary artery disease (≥ 50% stenosis) were excluded...
September 28, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/30264364/prospective-evaluation-of-left-atrial-function-and-late-gadolinium-enhancement-with-3-t-mri-in-patients-with-atrial-fibrillation-before-and-after-catheter-ablation
#16
Adrian Curta, Stephanie Fichtner, Reza Wakili, Heidi Estner, Harald Kramer
In a prospective, randomized study we performed left atrial (LA) functional imaging and late gadolinium enhancement (LGE) in patients undergoing pulmonary vein isolation with ablation of the anterior mitral line to evaluate LA function and visibility of the anterior mitral line and to explore the relationship of these factors to short- and long-term procedural success. Functional imaging of the LA and LGE-visualization 15 min post i.v. administration of gadobutrol was performed on a 3 T MRI system before and after ablation...
September 27, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/30264363/changes-in-left-ventricular-function-in-patients-with-aortic-regurgitation-12-months-after-transapical-transcatheter-aortic-valve-implantation
#17
Ming-Dan Deng, Xin Wei, Xiao-Ling Zhang, Xiao-Dong Li, Gu-Yue Liu, Da Zhu, Ying-Qiang Guo, Hong Tang
Transcatheter aortic valve implantation (TAVI) is an established treatment for high surgical risk aortic stenosis patients; in recent years, it has also been used in patients with pure/dominant aortic regurgitation (AR). This study aimed to determine the impact of transapical TAVI on left ventricle myocardial mechanics in AR patients. Thirty AR patients (70% men; mean age, 72.8 ± 4.3 years) were enrolled. Conventional echocardiography was performed on all patients before and 12 months after TAVI. Three-dimensional speckle tracking was accomplished in 20 AR patients for the evaluation of global longitudinal strain, global circumferential strain, twist, torsion, apical rotation and basal rotation...
September 27, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/30251176/left-ventricular-myocardial-t1-mapping-and-stain-analysis-evaluate-cardiac-abnormality-in-hypothyroidism
#18
Min Liu, Weifang Liu, Peiyao Zhang, Jing An, Guang Wang
Cardiovascular Magnetic Resonance (CMR)-based T1 mapping and Heart Deformation Analysis (CMR-HDA) can assess the myocardial tissue characteristic and strain of cardiomyopathy. Whether they can assess cardiac abnormality of hypothyroidism (HT) is unknown. We aim to analysis left ventricular (LV) T1 values and strain of patients with overt HT (OHT) and subclinical HT (SHT) with CMR-based T1 mapping and HDA. This study prospectively included 32 OHT patients, 23 SHT patients and 27 healthy controls who underwent CMR...
September 24, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/30251175/left-atrial-ventricular-and-atrio-ventricular-strain-in-patients-with-subclinical-heart-dysfunction
#19
Matteo Cameli, Giulia Elena Mandoli, Edoardo Lisi, Aladino Ibrahim, Eufemia Incampo, Gianluigi Buccoliero, Cosimo Rizzo, Fiorella Devito, Marco Matteo Ciccone, Sergio Mondillo
Arterial hypertension (AH) and diabetes mellitus (DM) are the most common causes of heart deterioration because of their high prevalence in the population. The aim of this study was to evaluate peak left atrial (LA), longitudinal strain (PALS), left ventricular (LV), longitudinal  strain (LS) and global atrial-ventricular strain (GAVS), by speckle-tracking echocardiography (STE), in asymptomatic patients with AH or/and DM and normal LA, LV size and ejection fraction (EF), to analyze their capability to detect early subclinical dysfunction...
September 24, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/30229344/reproducibility-of-global-left-atrial-strain-and-strain-rate-between-novice-and-expert-using-multi-vendor-analysis-software
#20
Karen Rausch, Kenji Shiino, Anthony Putrino, Alfred King-Yin Lam, Gregory M Scalia, Jonathan Chan
Left atrial (LA) strain is an emerging technique with potential applications including arrhythmia prediction in atrial fibrillation and early identification of atrial dysfunction. The aim of this study was to evaluate reproducibility of LA strain and strain rate (SR) using multi-vendor analysis software between novice and expert. For LA strain to be a reliable tool, the technique must be reproducible by observers with variable experience. Use of multi-vendor analysis software allows serial strain assessment when echocardiographic images are acquired using different vendors...
September 18, 2018: International Journal of Cardiovascular Imaging
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