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left ventricular reconstruction

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https://www.readbyqxmd.com/read/29788059/impact-of-right-ventricular-volume-and-function-evaluated-using-cardiovascular-magnetic-resonance-imaging-on-outcomes-after-surgical-ventricular-reconstruction
#1
Sachiko Yamazaki, Satoshi Numata, Tomoya Inoue, Keiichi Itatani, Kazuki Morimoto, Suguru Ohira, Kaichiro Manabe, Isao Yokota, Hitoshi Yaku
OBJECTIVES: This study aimed to evaluate whether cardiac magnetic resonance imaging (MRI)-derived right ventricular (RV) assessment can facilitate risk stratification among patients with ischaemic cardiomyopathy who underwent surgical ventricular reconstruction (SVR). METHODS: We retrospectively analysed 53 patients who underwent SVR. The patients were preoperatively evaluated using cardiac MRI. Cine-MRI was acquired for left ventricular (LV) and RV volume. Gadolinium-enhanced MRI was performed to evaluate LV scarring...
May 17, 2018: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/29783986/impact-of-the-cone-operation-on-left-ventricular-size-function-and-dyssynchrony-in-ebstein-anomaly-a-cardiovascular-magnetic-resonance-study
#2
Rebecca S Beroukhim, Linyuan Jing, David M Harrild, Brandon K Fornwalt, Abba Mejia-Spiegeler, Jonathan Rhodes, Sitaram Emani, Andrew J Powell
BACKGROUND: In addition to tricuspid regurgitation (TR) and right ventricular (RV) enlargement, patients with Ebstein anomaly are at risk for left ventricular (LV) dysfunction and dyssynchrony. We studied the impact of the cone tricuspid valve reconstruction operation on LV size, function, and dyssynchrony. METHODS: All Ebstein anomaly patients who had both pre- and postoperative cardiovascular magnetic resonance (CMR) studies were retrospectively identified. From cine images, RV and LV volumes and ejection fractions (EF) were calculated, and LV circumferential and longitudinal strain were measured by feature tracking...
May 21, 2018: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29780073/early-lvad-implantation-in-a-patient-with-left-ventricular-failure-after-aortic-dissection-with-left-main-stem-involvement
#3
Hazem El Beyrouti, Angela Kornberger, Nancy Halloum, Andres Beiras-Fernandez, Christian-Friedrich Vahl
BACKGROUND: Coronary involvement in aortic dissection heralds a poor outcome. Involvement of the left main stem may lead to left ventricular (LV) failure requiring mechanical circulatory support. CASE REPORT: A staged approach was applied in a 24-year-old female who suffered extensive infarction due to aortic dissection with left main stem involvement. After replacement of the ascending aorta and grafting of the left internal thoracic artery to the left anterior descending artery following a failed attempt at reconstruction of the left coronary ostium, she failed to wean from cardiopulmonary bypass (CPB) and underwent implantation of an extracorporeal life support (ECLS) system as a bridge to decision...
May 21, 2018: Annals of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29770766/histogram-pattern-analysis-of-the-lung-perfused-blood-volume-for-assessment-of-pulmonary-thromboembolism
#4
Munemasa Okada, Takafumi Nomura, Yoshiteru Nakashima, Yoshie Kunihiro, Shoji Kido
PURPOSE: We aimed to evaluate the usefulness of histograms of lung perfused blood volume (HLPBV) based on the presence of pulmonary thromboembolism (PTE) and the pulmonary embolic burden. METHODS: A total of 168 patients (55 males; mean age, 62.9 years) underwent contrast-enhanced dual-energy computed tomography (DECT) between January 1 2012 and October 31 2014. Initial DECT images were three-dimensionally reconstructed, and the HLPBV patterns were divided into three types, including the symmetric type (131 patients, 78...
May 2018: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/29770201/recent-advances-in-managing-septal-defects-ventricular-septal-defects-and-atrioventricular-septal-defects
#5
REVIEW
P Syamasundar Rao, Andrea D Harris
This review discusses the management of ventricular septal defects (VSDs) and atrioventricular septal defects (AVSDs). There are several types of VSDs: perimembranous, supracristal, atrioventricular septal, and muscular. The indications for closure are moderate to large VSDs with enlarged left atrium and left ventricle or elevated pulmonary artery pressure (or both) and a pulmonary-to-systemic flow ratio greater than 2:1. Surgical closure is recommended for large perimembranous VSDs, supracristal VSDs, and VSDs with aortic valve prolapse...
2018: F1000Research
https://www.readbyqxmd.com/read/29769130/diagnostic-accuracy-of-low-dose-dual-source-cardiac-computed-tomography-as-compared-to-surgery-in-univentricular-heart-patients
#6
Narumol Chaosuwannakit, Pattarapong Makarawate
BACKGROUND: To evaluate the ability of low radiation dose dual-source computed tomography (DSCT) to depict the features of morphological univentricular heart and to define accuracy by comparing findings with surgery. METHODS: Low radiation dose dual-source cardiac computed tomography (CCT) of 33 cases of functional univentricular heart preliminary diagnosis by echocardiography compared with the results of surgery were retrospectively analyzed (aged 1 day to 4 years, median 5 months)...
May 16, 2018: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/29761081/enhanced-aortic-pressure-wave-reflection-in-patients-with-aortic-coarctation-after-aortic-arch-repair
#7
REVIEW
Tomoaki Murakami
Background: In patients with aortic coarctation after successful aortic arch repair, it is well known that early-onset cardiovascular diseases can develop. Summary: We studied the pressure waveform in patients after aortic arch repair focusing on a pressure wave reflection. In patients after aortic arch repair, the repaired portion generates a new reflected pressure wave. As a result, the newly generated pressure wave causes aortic pressure augmentation, loss of pressure amplification, and left ventricular hypertrophy with fibrosis...
March 2018: Pulse (Basel, Switzerland)
https://www.readbyqxmd.com/read/29760665/left-ventricular-trabeculations-decrease-the-wall-shear-stress-and-increase-the-intra-ventricular-pressure-drop-in-cfd-simulations
#8
Federica Sacco, Bruno Paun, Oriol Lehmkuhl, Tinen L Iles, Paul A Iaizzo, Guillaume Houzeaux, Mariano Vázquez, Constantine Butakoff, Jazmin Aguado-Sierra
The aim of the present study is to characterize the hemodynamics of left ventricular (LV) geometries to examine the impact of trabeculae and papillary muscles (PMs) on blood flow using high performance computing (HPC). Five pairs of detailed and smoothed LV endocardium models were reconstructed from high-resolution magnetic resonance images (MRI) of ex-vivo human hearts. The detailed model of one LV pair is characterized only by the PMs and few big trabeculae, to represent state of art level of endocardial detail...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29753817/arch-augmentation-via-median-sternotomy-for-coarctation-of-aorta-with-proximal-arch-hypoplasia
#9
W Hampton Gray, Winfield J Wells, Vaughn A Starnes, S Ram Kumar
BACKGROUND: Coarctation of the aorta can be associated with hypoplasia of the proximal transverse aortic arch. One approach to manage this condition is via left thoracotomy and extended end-to-end anastomosis with the expectation that the proximal arch will grow over time. Our preferred approach is to augment the aorta via midline sternotomy. We hypothesized that this approach is safe, durable and allows reliable growth of the aorta. METHODS: We identified the records of patients with biventricular anatomy who had coarctation of the aorta, hypoplasia of the proximal transverse arch, and no other cardiac lesion that would mandate cardiopulmonary bypass use and midline sternotomy...
May 10, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29681572/improved-diagnosis-of-detection-of-late-enhancement-in-left-ventricular-myocardium-using-2nd-generation-320-slice-ct-reconstructed-with-first-in-non-ischemic-cardiomyopathy
#10
Hiroyuki Takaoka, Nobusada Funabashi, Koya Ozawa, Masae Uehara, Koichi Sano, Issei Komuro, Yoshio Kobayashi
Forward Projected Model-based Iterative Reconstruction SoluTion (FIRST) is a new reconstruction technique using CT, which provides successful reconstruction of high-quality CT images, especially in low contrast imaging. To evaluate improvements in the diagnostic accuracy of the detection of abnormal late enhancement (LE) in left-ventricular myocardium (LVM) using 320-slice CT with FIRST, we compared this modality with previous CT methods in patients with non-ischemic cardiomyopathy or a cardiac tumor.This was a retrospective study of 88 patients (56 males; 57 ± 15 years) suspected of having non-ischemic myocardial disease or a cardiac tumor...
April 20, 2018: International Heart Journal
https://www.readbyqxmd.com/read/29670532/confocal-microscopy-based-estimation-of-parameters-for-computational-modeling-of-electrical-conduction-in-the-normal-and-infarcted-heart
#11
Joachim Greiner, Aparna C Sankarankutty, Gunnar Seemann, Thomas Seidel, Frank B Sachse
Computational modeling is an important tool to advance our knowledge on cardiac diseases and their underlying mechanisms. Computational models of conduction in cardiac tissues require identification of parameters. Our knowledge on these parameters is limited, especially for diseased tissues. Here, we assessed and quantified parameters for computational modeling of conduction in cardiac tissues. We used a rabbit model of myocardial infarction (MI) and an imaging-based approach to derive the parameters. Left ventricular tissue samples were obtained from fixed control hearts (animals: 5) and infarcted hearts (animals: 6) within 200 μm (region 1), 250-750 μm (region 2) and 1,000-1,250 μm (region 3) of the MI border...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29643812/left-ventricular-wall-stress-is-sensitive-marker-of-hypertrophic-cardiomyopathy-with-preserved-ejection-fraction
#12
Xiaodan Zhao, Ru-San Tan, Hak-Chiaw Tang, Soo-Kng Teo, Yi Su, Min Wan, Shuang Leng, Jun-Mei Zhang, John Allen, Ghassan S Kassab, Liang Zhong
Hypertrophic cardiomyopathy (HCM) patients present altered myocardial mechanics due to the hypertrophied ventricular wall and are typically diagnosed by the increase in myocardium wall thickness. This study aimed to quantify regional left ventricular (LV) shape, wall stress and deformation from cardiac magnetic resonance (MR) images in HCM patients and controls, in order to establish superior measures to differentiate HCM from controls. A total of 19 HCM patients and 19 controls underwent cardiac MR scans. The acquired MR images were used to reconstruct 3D LV geometrical models and compute the regional parameters (i...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29607143/early-and-mid-term-follow-up-of-patients-receiving-arterial-switch-operation-a-single-center-experience
#13
Yaqiong Xiao, Ping Zhang, Wei Su, Nianguo Dong
Background: The arterial switch operation (ASO) has become the preferred method for surgical correction of transposition of the great arteries (TGA) and Taussig-Bing anomaly. This study was aimed to analysis the early and mid-term results of patients receiving ASO for TGA and Taussig-Bing anomaly in our institute. Methods: A single-institution retrospective study was conducted to assess cardiovascular outcomes after ASO between January 2007 and December 2013. A total of 119 consecutive patients were included in this study...
February 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29590404/intraoperative-customized-double-patch-device-with-twin-sutures-for-multiple-muscular-septal-defects
#14
Gananjay G Salve, Shreepal A Jain, Bharti Sharma, Manglesh S Nimbalkar, Sandip S Katkade, Jeril Kurien, Nilesh S Bhadane, Bharat V Dalvi, Raman Krishna Kumar, Krishnanaik Shivaprakash
OBJECTIVES: Closure of multiple muscular ventricular septal defects (VSDs) remains a challenge because of anatomical complexity. METHODS: We mapped all the VSDs using en face reconstruction of the right ventricular septal surface through echocardiography and then performed an 'Intraoperative Customized Double-Patch Device' technique to surgically close them in 39 patients (male:female = 25:14). The median age of the patients was 6 months (2 months-10 years), and mean weight was 5...
March 26, 2018: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29588890/endoscopic-transsphenoidal-salvage-surgery-for-symptomatic-residual-cystic-craniopharyngioma-after-radiotherapy
#15
Enzo Emanuelli, Giuliana Frasson, Diego Cazzador, Daniele Borsetto, Luca Denaro
Objectives  Ideal treatment of craniopharyngiomas is still controversial. Radiotherapy (RT) is considered effective for recurrences or after subtotal tumor removal (STR). About 40 to 50% of patients may experience tumor cyst expansion soon after RT; in these cases, the role of salvage surgery is debated. Design  Operative video. Setting  Tertiary care center. Participants  An 11-year-old boy diagnosed with persistent craniopharyngioma. In 2015, the patient underwent right frontotemporal craniotomy for STR at another center, complicated by panhypopituitarism...
April 2018: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/29572594/blood-pool-and-tissue-phase-patient-motion-effects-on-82-rubidium-pet-myocardial-blood-flow-quantification
#16
Benjamin C Lee, Jonathan B Moody, Alexis Poitrasson-Rivière, Amanda C Melvin, Richard L Weinberg, James R Corbett, Edward P Ficaro, Venkatesh L Murthy
BACKGROUND: Patient motion can lead to misalignment of left ventricular volumes of interest and subsequently inaccurate quantification of myocardial blood flow (MBF) and flow reserve (MFR) from dynamic PET myocardial perfusion images. We aimed to identify the prevalence of patient motion in both blood and tissue phases and analyze the effects of this motion on MBF and MFR estimates. METHODS: We selected 225 consecutive patients that underwent dynamic stress/rest rubidium-82 chloride (82 Rb) PET imaging...
March 23, 2018: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29569368/optimal-reconstruction-of-left-ventricular-outflow-tract-obstruction-before-surgical-myectomy-in-a-case-with-hypertrophic-obstructive-cardiomyopathy
#17
Hiroyuki Toh, Shumpei Mori, Shinsuke Shimoyama, Yu Izawa, Shun Yokota, Yuto Shinkura, Ryo Takeshige, Akira Nagasawa, Fumitaka Soga, Hidekazu Tanaka, Toshiro Shinke, Koki Yokawa, Takashi Matsueda, Yutaka Okita, Ken-Ichi Hirata
We present optimally reconstructed three-dimensional computed tomography images of left ventricular outflow obstruction, comprehensive left ventriculography, and comparable intraoperative transesophageal echocardiography, as well as serial operative pictures, to facilitate the understanding of live-heart anatomy of hypertrophic obstructive cardiomyopathy. As shown in this case, detailed morphological analysis around the left ventricular outflow tract using preoperative computed tomography would be feasible and useful...
March 22, 2018: Echocardiography
https://www.readbyqxmd.com/read/29568740/feasibility-of-computational-fluid-dynamics-for-evaluating-the-intraventricular-hemodynamics-in-single-right-ventricle-based-on-echocardiographic-images
#18
Li-Jun Chen, Zhi-Rong Tong, Qian Wang, Yu-Qi Zhang, Jin-Long Liu
This study introduced a combined computational fluid dynamics (CFD) and echocardiography methodology to simulate blood flow in the single right ventricle (SRV) and normal ventricles to study the intraventricular flow. Derived from echocardiographic image loops, CFD-based three-dimensional (3D) flow models of normal subject's left ventricle (LV) and right ventricle (RV) and SRV with and without heart failure at three characteristic diastolic statuses were reconstructed. The CFD derived morphological and functional measurements in normal ventricles and the SRV were validated with echocardiography...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29567628/coronary-computed-tomography-angiography-and-endocardial-leads-image-quality-in-320-row-ct-using-iterative-reconstruction
#19
Marietta Garmer, Marc Bonsels, Frauke Metz, Oliver Klein-Wiele, Bodo Brandts, Dietrich Grönemeyer
PURPOSE: To investigate whether the presence of endocardial leads has an impact on image quality in coronary computed tomography angiography (CCTA), when current technique is employed using a 320-row computed tomography and iterative reconstruction. MATERIALS AND METHODS: CCTA was performed in 1641 patients, from these we identified 51 patients (study group) with endocardial leads and 51 matched partners (control group) without endocardial leads. Noise was determined in the ascending aorta and the left ventricle; signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were determined in the left and right coronary artery...
March 2, 2018: Clinical Imaging
https://www.readbyqxmd.com/read/29565646/a-mechanism-for-3d-semi-automated-myocardium-boundary-detection-using-displacement-encoding-with-stimulated-echoes-dense
#20
Julia Karr, Xiaodong Zhong, Michael V Cohen, Angela Judice-Yates, Eduardo Rel, Maria S Figarola
OBJECTIVE: Displacement ENcoding with Stimulated Echoes (DENSE) is a MRI technique developed to encode phase related to myocardial tissue displacements, and the displacement information directly applied towards detecting left-ventricular (LV) myocardial motion during the cardiac cycle. The purpose of this study is to present a novel, 3D DENSE displacement-based and magnitude image quantization-based, semi-automated detection technique for myocardial wall motion whose boundaries are used for rapid and automated computation of 3D myocardial strain...
March 22, 2018: British Journal of Radiology
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