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International Journal of Cardiovascular Imaging

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https://www.readbyqxmd.com/read/28631107/non-invasive-coronary-wave-intensity-analysis
#1
Christopher J Broyd, Fausto Rigo, Justin Davies
Wave intensity analysis is calculated from simultaneously acquired measures of pressure and flow. Its mathematical computation produces a profile that provides quantitative information on the energy exchange driving blood flow acceleration and deceleration. Within the coronary circulation it has proven most useful in describing the wave that originates from the myocardium and that is responsible for driving the majority of coronary flow, labelled the backward decompression wave. Whilst this wave has demonstrated valuable insights into the pathogenic processes of a number of disease states, its measurement is hampered by its invasive necessity...
June 19, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28631106/transthoracic-3d-echocardiographic-left-heart-chamber-quantification-in-patients-with-bicuspid-aortic-valve-disease
#2
Allard T van den Hoven, Jackie S Mc-Ghie, Raluca G Chelu, Anthonie L Duijnhouwer, Vivan J M Baggen, Adriaan Coenen, Wim B Vletter, Marcel L Dijkshoorn, Annemien E van den Bosch, Jolien W Roos-Hesselink
Integration of volumetric heart chamber quantification by 3D echocardiography into clinical practice has been hampered by several factors which a new fully automated algorithm (Left Heart Model, (LHM)) may help overcome. This study therefore aims to evaluate the feasibility and accuracy of the LHM software in quantifying left atrial and left ventricular volumes and left ventricular ejection fraction in a cohort of patients with a bicuspid aortic valve. Patients with a bicuspid aortic valve were prospectively included...
June 19, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28631105/stent-fracture-is-associated-with-a-higher-mortality-in-patients-with-type-2-diabetes-treated-by-implantation-of-a-second-generation-drug-eluting-stent
#3
Zhen Ge, Zhi-Zhong Liu, Jing Kan, Jun-Jie Zhang, Sui-Ji Li, Nai-Liang Tian, Fei Ye, Xue-Song Qian, Song Yang, Meng-Xuan Chen, Tanveer S Rab, Shao-Liang Chen
Type 2 diabetes correlates with clinical events after the implantation of a second-generation drug-eluting stent (DES). The rate and prognostic value of stent fracture (SF) in patients with diabetes who underwent DES implantation remain unknown. A total of 1160 patients with- and 2251 without- diabetes, who underwent surveillance angiography at 1 year after DES implantation between June 2004 and August 2014, were prospectively studied. The primary endpoints included the incidence of SF and a composite major adverse cardiac event [MACE, including myocardial infarction (MI), cardiac death, and target-vessel revascularization (TVR)] at 1-year follow-up and at the end of follow-up for overall patients, and target lesion failure [TLF, including cardiac death, target vessel myocardial infarction (TVMI) and target lesion revascularization (TLR)] at the end of study for SF patients...
June 19, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28623496/association-between-flow-skewness-and-aortic-dilatation-in-patients-with-aortic-stenosis
#4
Hojin Ha, Hyun Jung Koo, June Goo Lee, Guk Bae Kim, Jihoon Kweon, Sang Joon Lee, Joon Won Kang, Tae Hwan Lim, Dae Hee Kim, Jong Min Song, Duk Hyun Kang, Jae Kwan Song, Young Hak Kim, Namkug Kim, Dong Hyun Yang
We investigated association between hemodynamic characteristics and aortic dilatation in patients with severe aortic stenosis (AS). Eighty patients with severe AS (mean age, 67.2 ± 12.5 years) who underwent multi-detector computed tomography and phase-contrast magnetic resonance imaging at the ascending aorta were retrospectively analyzed. Patients with an ascending aorta diameter >4 cm had a significantly higher forward flow rate at systole (28.5 ± 6.0 vs. 36.2 ± 8.6 L min, P < 0...
June 16, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28623495/whence-we-came-whither-we-go
#5
EDITORIAL
Shengxian Tu, Tim P van de Hoef, Young-Hak Kim, Javier Escaned, William Wijns
No abstract text is available yet for this article.
June 16, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28620681/cardiac-t1-mapping-in-congenital-heart-disease-bolus-vs-infusion-protocols-for-measurements-of-myocardial-extracellular-volume-fraction
#6
Nadya Al-Wakeel-Marquard, Sanaz Rastin, Frédéric Muench, Darach O H-Ici, Sevim Yilmaz, Felix Berger, Titus Kuehne, Daniel R Messroghli
Myocardial extracellular volume fraction (ECV) reflecting diffuse myocardial fibrosis can be measured with T1 mapping cardiovascular magnetic resonance (CMR) before and after the application of a gadolinium-based extracellular contrast agent. The equilibrium between blood and myocardium contrast concentration required for ECV measurements can be obtained with a primed contrast infusion (equilibrium contrast-CMR). We hypothesized that equilibrium can also be achieved with a single contrast bolus to accurately measure diffuse myocardial fibrosis in patients with congenital heart disease (CHD)...
June 15, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28616762/a-systematic-comparison-of-cardiovascular-magnetic-resonance-and-high-resolution-histological-fibrosis-quantification-in-a-chronic-porcine-infarct-model
#7
Johannes M I H Gho, René van Es, Frebus J van Slochteren, Sanne J Jansen Of Lorkeers, Allard J Hauer, Joep W M van Oorschot, Pieter A Doevendans, Tim Leiner, Aryan Vink, Folkert W Asselbergs, Steven A J Chamuleau
The noninvasive reference standard for myocardial fibrosis detection on cardiovascular magnetic resonance imaging (CMR) is late gadolinium enhancement (LGE). Currently there is no consensus on the preferred method for LGE quantification. Moreover myocardial wall thickening (WT) and strain are measures of regional deformation and function. The aim of this research was to systematically compare in vivo CMR parameters, such as LGE, WT and strain, with histological fibrosis quantification. Eight weeks after 90 min ischemia/reperfusion of the LAD artery, 16 pigs underwent in vivo Cine and LGE CMR...
June 14, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28612277/3-0%C3%A2-t-magnetic-resonance-myocardial-perfusion-imaging-for-semi-quantitative-evaluation-of-coronary-microvascular-dysfunction-in-hypertrophic-cardiomyopathy
#8
Liang Yin, Hai-Yan Xu, Sui-Sheng Zheng, Ying Zhu, Jiang-Xi Xiao, Wei Zhou, Si-Si Yu, Liang-Geng Gong
This study aimed to assess coronary microvascular dysfunction (CMD) differences in hypertrophic cardiomyopathy (HCM) patients using cardiac magnetic resonance (CMR) first-pass perfusion and late gadolinium enhancement imaging. Forty-seven patients with HCM and twenty-one healthy volunteers underwent CMR at rest. Imaging protocols included short axis cine, first-pass myocardial perfusion, and late gadolinium enhancement (LGE). Left ventricular end-diastolic wall thickness (EDTH), LGE, time to peak (Tpeak), maximal up-slope (Slopemax), and peak signal intensity (SIpeak) were assessed for each myocardial segment...
June 13, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28612276/clinical-risk-stratification-of-acute-pulmonary-embolism-comparing-the-usefulness-of-cta-obstruction-score-and-pulmonary-perfusion-defect-score-with-dual-energy-ct
#9
Wei-Fang Kong, Yu-Ting Wang, Long-Lin Yin, Hong Pu, Ke-Yan Tao
To compare the ability of CT angiography (CTA) obstruction score and perfusion defect score on dual energy CT perfusion imaging (DEPI) for clinical risk stratification of patients with acute pulmonary embolism (PE). 55 patients diagnosed as acute PE either by CTA or DEPI were retrospectively enrolled. Patients were grouped into high-, intermediate-, and low-risk groups in accordance to the renewed guidelines of 2014. Consistency between DEPI and CTA in diagnosis of PE were assessed. Correlations between CT parameters and right-to-left ventricular (RV/LV) diameter ratio were evaluated...
June 13, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28597125/new-insight-to-estimate-under-expansion-after-stent-implantation-on-bifurcation-lesions-using-optical-coherence-tomography
#10
Daisuke Nakamura, Guilherme F Attizzani, Setsu Nishino, Kentaro Tanaka, Mohamad Soud, Gabriel T Pereira, Milana Leygerman, Anas Fares, Audrey Schnell, Marco A Costa, Andrejs Erglis, Hiram G Bezerra
Optical coherence tomography (OCT) allows full volumetric segmentation of the lumen. However, for the estimation of stent under-expansion we still rely on the conventional method (CM) of single cross-sectional narrowing compared with reference vessel, likely masking true lesion significance, especially for bifurcations and tapered vessels. We, therefore, suggest a novel concept of volumetric metrics that take into account vessel tapering and major side branches and is capable of obtaining ideal lumen area for every frame of the stent by OCT...
June 8, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28597124/relative-atherosclerotic-plaque-volume-by-ct-coronary-angiography-trumps-conventional-stenosis-assessment-for-identifying-flow-limiting-lesions
#11
Nahoko Kato, Satoru Kishi, Armin Arbab-Zadeh, Frank J Rybicki, Shuzou Tanimoto, Jiro Aoki, Mika Watanabe, Yu Horiuchi, Koichi Furui, Kazuhiro Hara, Kenji Ibukuro, Joao A C Lima, Kengo Tanabe
The new methods for diagnosing the ischemia with coronary computed tomographic angiography (CTA) as a noninvasive test have been investigated. To compare the relative plaque volume to quantitative CTA and quantitative coronary angiography (QCA) for detecting flow-limiting coronary artery stenoses. We studied 49 patients with 55 intermediate lesions (30-69% diameter stenosis) who underwent CTA, coronary angiography (CAG), and FFR. CTA and QCA measures included lesion length, percent diameter stenosis (%DS), minimal lumen diameter (MLD), target main vessel percent plaque volume (%PV), lesion %PV, target main vessel percent lumen volume (%LV), and lesion %LV...
June 8, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28593399/mri-use-for-atrial-tissue-characterization-in-arrhythmias-and-for-ep-procedure-guidance
#12
Ehud J Schmidt, Henry R Halperin
We review the utilization of magnetic resonance imaging methods for classifying atrial tissue properties that act as a substrate for common cardiac arrhythmias, such as atrial fibrillation. We then review state-of-the-art methods for mapping this substrate as a predicate for treatment, as well as methods used to ablate the electrical pathways that cause arrhythmia and restore patients to sinus rhythm.
June 7, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28593398/localization-of-angiosarcoma-by-peri-operative-transesophageal-echocardiography
#13
Yi-Chun Chen
Transthoracic echocardiography (TTE), computed tomography (CT) and magnetic resonance (MR) cannot always clearly identify angiosarcoma. A 22 year old woman presented with dyspnea. Preoperative TTE showed no tumor, and CT and MR both gave the impression that an extra-cardiac, mediastinal tumor was present. Transesophageal echocardiography (TEE), performed during surgery showed an intra-cardiac tumor, which was a well-delineated mass at the intra-ventricular groove of the right heart and surrounding the superior vena cava...
June 7, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28589483/high-electrical-activity-at-the-connection-site-of-previously-undetected-anomalous-pulmonary-venous-drainage-in-a-patient-presenting-with-atrial-fibrillation
#14
Susanne Löbe, Sebastian Hilbert, Borislav Dinov, Gerhard Hindricks, Cosima Jahnke, Ingo Paetsch
No abstract text is available yet for this article.
June 6, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28589482/sasha-versus-shmolli-a-comparison-of-t1-mapping-methods-in-health-and-dilated-cardiomyopathy-at-3%C3%A2-t
#15
Benedict T Costello, Fabian Springer, James L Hare, Andre La Gerche, Leah Iles, Andris H Ellims, Benjamin Schmitt, Andrew J Taylor
Cardiac Magnetic Resonance derived T1 mapping parameters are a non-invasive method of estimating diffuse myocardial fibrosis. This study aims to to determine the native T1 time, post contrast T1 time and extracellular volume (ECV) derived from T1 mapping and to evaluate the ability of T1 mapping techniques to discriminate healthy myocardium from dilated cardiomyopathy. Seventy-nine participants underwent cardiac magnetic resonance imaging at the Baker Heart and Diabetes Institute, Melbourne, Australia. Fifty-seven healthy volunteers and twenty-two patients with Dilated cardiomyopathy were included in the study...
June 6, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28577046/fractional-flow-reserve-a-clinical-perspective
#16
David Corcoran, Barry Hennigan, Colin Berry
Fractional flow reserve (FFR) is a reference invasive diagnostic test to assess the physiological significance of an epicardial coronary artery stenosis. FFR-guided percutaneous coronary intervention in stable coronary artery disease has been assessed in three seminal clinical trials and the indications for FFR assessment are expanding into other clinical scenarios. In this article we review the theoretical, experimental and clinical basis for FFR measurement. We place FFR measurement in the context of the comprehensive invasive assessment of coronary physiology in patients presenting with known or suspected angina pectoris in daily clinical practice, and review the recent developments in FFR assessment...
June 2, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28567706/the-effect-of-strut-thickness-on-shear-stress-distribution-in-a-preclinical-model
#17
Erhan Tenekecioglu, Ryo Torii, Christos Bourantas, Yosuke Miyazaki, Carlos Collet, Rasha Al-Lameé, Kadem Al-Lameé, Yoshinobu Onuma, Patrick W Serruys
No abstract text is available yet for this article.
May 31, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28567705/diagnostic-value-of-doppler-echocardiography-for-identifying-hemodynamic-significant-pulmonary-valve-regurgitation-in-tetralogy-of-fallot-comparison-with-cardiac-mri
#18
Niek E G Beurskens, Thomas M Gorter, Petronella G Pieper, Elke S Hoendermis, Beatrijs Bartelds, Tjark Ebels, Rolf M F Berger, Tineke P Willems, Joost P van Melle
Quantification of pulmonary regurgitation (PR) is essential in the management of patients with repaired tetralogy of Fallot (TOF). We sought to evaluate the accuracy of first-line Doppler echocardiography in comparison with cardiac magnetic resonance imaging (MRI) to identify hemodynamic significant PR. Paired cardiac MRI and echocardiographic studies (n = 97) in patients with repaired TOF were retrospectively analyzed. Pressure half time (PHT) and pulmonary regurgitation index (PRi) were measured using continuous wave Doppler...
May 31, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28555389/plaque-characteristics-and-inflammatory-markers-for-the-prediction-of-major-cardiovascular-events-in-patients-with-st-segment-elevation-myocardial-infarction
#19
Ae-Young Her, Kyoung Im Cho, Gillian Balbir Singh, Dae Seong An, Young-Hoon Jeong, Bon-Kwon Koo, Eun-Seok Shin
To investigate the clinical utility of culprit plaque characteristics and inflammatory markers for the prediction of future cardiovascular events in patients with ST-segment elevation myocardial infarction (STEMI) with successful drug-eluting stent (DES) implantation. We evaluated 172 STEMI patients with successful primary percutaneous coronary intervention (PCI) with DES using pre-PCI high-sensitivity C-reactive protein (hs-CRP), neutrophil-to-lymphocyte ratio (NLR) and pre-PCI intravascular ultrasound virtual histology (IVUS-VH) of culprit lesions...
May 29, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28555388/right-coronary-artery-ectasia-with-coronary-arteriovenous-fistula-mimicking-takotsubo-like-left-ventricular-dysfunction-in-the-electrocardiogram
#20
Akane Tsuchiya, Michiaki Nagai, Keigo Dote
A coronary arteriovenous fistula is an abnormal connection between a coronary artery and any of four chambers in the heart. We repot a unique case with a fistulae originating from right coronary artery and draining into the right atrium via coronary sinus although Takotsubo-like left ventricular dysfunction or acute myocardial infarction was initially thought to have occurred according to the electrocardiogram finding.
May 29, 2017: International Journal of Cardiovascular Imaging
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