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Heart anatomy

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https://www.readbyqxmd.com/read/28648650/planning-execution-and-follow-up-for-endovascular-aortic-aneurysm-repair-using-a-highly-restrictive-iodinated-contrast-protocol-in-patients-with-severe-renal-disease
#1
E Gallitto, G L Faggioli, M Gargiulo, A Freyrie, R Pini, C Mascoli, S Ancetti, V Vento, A Stella
BACKGROUND: The cumulative amount of iodinated-contrast-medium necessary for EVAR planning, operative procedure and subsequent follow-up is a threat for the onset of end stage renal disease in patients with pre-operative impaired kidney function. Purpose of this study is to describe a mini-invasive approach aimed to minimize the exposure of these patients to iodinated-contrast-medium and the subsequent risk of renal function worsening. METHODS: From 2012 to 2015, all patients with abdominal aortic aneurysm (AAA) at high-surgical risk and fit for standard endovascular repair (simple aortic-iliac anatomy: proximal and distal neck length ≥15mm, no severe angulation), underwent EVAR through the following "near-zero contrast" approach, if their glomerular filtration rate (GFR) was <30 mL/min: pre-operative planning was performed by non-contrast enhanced computed tomography (CT) and duplex-ultrasound (DU); the origin of renal/hypogastric arteries and aortic bifurcation was evaluated and matched with vertebral bone landmarks and the endograft deployed accordingly, using < 20cc of isotonic iodinate-contrast-medium and contrast-enhancement-DU (CEUS)...
June 22, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28648301/associations-of-early-kidney-disease-with-brain-magnetic-resonance-imaging-and-cognitive-function-in-african-americans-with-type-2-diabetes-mellitus
#2
Barry I Freedman, Kaycee M Sink, Christina E Hugenschmidt, Timothy M Hughes, Jeff D Williamson, Christopher T Whitlow, Nicholette D Palmer, Michael E Miller, Laura C Lovato, Jianzhao Xu, S Carrie Smith, Lenore J Launer, Joshua I Barzilay, Robert M Cohen, Mark D Sullivan, R Nick Bryan, Benjamin C Wagner, Donald W Bowden, Joseph A Maldjian, Jasmin Divers
BACKGROUND: Relationships between early kidney disease, neurocognitive function, and brain anatomy are poorly defined in African Americans with type 2 diabetes mellitus (T2DM). STUDY DESIGN: Cross-sectional associations were assessed between cerebral anatomy and cognitive performance with estimated glomerular filtration rate (eGFR) and urine albumin-creatinine ratio (UACR) in African Americans with T2DM. SETTING & PARTICIPANTS: African Americans with cognitive testing and cerebral magnetic resonance imaging (MRI) in the African American-Diabetes Heart Study Memory in Diabetes (AA-DHS MIND; n=512; 480 with MRI) and Action to Control Cardiovascular Risk in Diabetes (ACCORD) MIND (n=484; 104 with MRI) studies...
June 22, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/28646848/an-analysis-of-historical-vignettes-by-ibn-sina-in-the-canon-of-medicine-on-the-structure-and-function-of-the-cardiorespiratory-apparatus
#3
Pedzisai Mazengenya, Rashid Bhikha
Ibn Sina is regarded as one of the greatest physicians, thinkers and medical scholars in the history of medicine. Ibn Sina, a Persian scholar in the medieval era, wrote a famous book of medicine, the Canon of Medicine. The book was adopted as the main textbook of medicine in most Western and Persian universities. In the present critique, we analyzed the functional and anatomic descriptions of the heart, airways and the lungs as viewed by Ibn Sina in volume three of the Canon of Medicine textbook, and compared them to modern anatomy texts...
June 2017: Archives of Iranian Medicine
https://www.readbyqxmd.com/read/28646273/pulmonary-vascular-volume-ratio-measured-by-cardiac-computed-tomography-in-children-and-young-adults-with-congenital-heart-disease-comparison-with-lung-perfusion-scintigraphy
#4
Hyun Woo Goo, Sang Hyub Park
BACKGROUND: Lung perfusion scintigraphy is regarded as the gold standard for evaluating differential lung perfusion ratio in congenital heart disease. OBJECTIVE: To compare cardiac CT with lung perfusion scintigraphy for estimated pulmonary vascular volume ratio in patients with congenital heart disease. MATERIALS AND METHODS: We included 52 children and young adults (median age 4 years, range 2 months to 28 years; 31 males) with congenital heart disease who underwent cardiac CT and lung perfusion scintigraphy without an interim surgical or transcatheter intervention and within 1 year...
June 23, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28641300/prenatal-diagnosis-of-dextrocardia-with-complex-congenital-heart-disease-using-fetal-intelligent-navigation-echocardiography-fine-and-a-literature-review
#5
Lami Yeo, Suchaya Luewan, Dor Markush, Navleen Gill, Roberto Romero
Fetal dextrocardia is a type of cardiac malposition where the major axis from base to apex points to the right side. This condition is usually associated with a wide spectrum of complex cardiac defects. As a result, dextrocardia is conceptually difficult to understand and diagnose on prenatal ultrasound. The advantage of four-dimensional sonography with spatiotemporal image correlation (STIC) is that this modality can facilitate fetal cardiac examination. A novel method known as fetal intelligent navigation echocardiography (FINE) allows automatic generation of nine standard fetal echocardiography views in normal hearts by applying intelligent navigation technology to STIC volume datasets...
June 23, 2017: Fetal Diagnosis and Therapy
https://www.readbyqxmd.com/read/28640452/role-of-epicardial-adipose-tissue-in-health-and-disease-a-matter-of-fat
#6
Bénédicte Gaborit, Coralie Sengenes, Patricia Ancel, Alexis Jacquier, Anne Dutour
Epicardial adipose tissue (EAT) is a small but very biologically active ectopic fat depot that surrounds the heart. Given its rapid metabolism, thermogenic capacity, unique transcriptome, secretory profile, and simply measurability, epicardial fat has drawn increasing attention among researchers attempting to elucidate its putative role in health and cardiovascular diseases. The cellular crosstalk between epicardial adipocytes and cells of the vascular wall or myocytes is high and suggests a local role for this tissue...
June 18, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/28639172/influence-of-cannulation-site-on-carotid-perfusion-during-extracorporeal-membrane-oxygenation-in-a-compliant-human-aortic-model
#7
Andreas Geier, Andreas Kunert, Günter Albrecht, Andreas Liebold, Markus Hoenicka
Blood oxygenized by veno-arterial extracorporeal membrane oxygenation (ECMO) can be returned to the aorta (central cannulation) or to peripheral arteries (axillar, femoral). Hemodynamic effects of these cannulation types were analyzed in a mock loop with an aortic model representative of normal anatomy and compliance under physiological pressures and flow rates. Pressures, flow rates, and contribution of ECMO flow to total flow as a measure of oxygen supply were monitored in the carotids. Steady or pulsatile ECMO flow, residual or no cardiac output, and intraaortic balloon pump counterpulsation were tested as independent factors...
June 21, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28633567/endogenous-bioelectric-signaling-networks-exploiting-voltage-gradients-for-control-of-growth-and-form
#8
Michael Levin, Giovanni Pezzulo, Joshua M Finkelstein
Living systems exhibit remarkable abilities to self-assemble, regenerate, and remodel complex shapes. How cellular networks construct and repair specific anatomical outcomes is an open question at the heart of the next-generation science of bioengineering. Developmental bioelectricity is an exciting emerging discipline that exploits endogenous bioelectric signaling among many cell types to regulate pattern formation. We provide a brief overview of this field, review recent data in which bioelectricity is used to control patterning in a range of model systems, and describe the molecular tools being used to probe the role of bioelectrics in the dynamic control of complex anatomy...
June 21, 2017: Annual Review of Biomedical Engineering
https://www.readbyqxmd.com/read/28632654/an-overview-of-cardiac-computed-tomography-in-adults-with-congenital-heart-disease
#9
Pal Suranyi, Akos Varga-Szemes, Anthony M Hlavacek
Familiarity with congenital heart disease (CHD) and its manifestations in adults is becoming increasingly important for the practicing cardiothoracic imager. The use of computed tomographic angiography is becoming commonplace not only in adults with a history and subsequent interventions for CHD as a child but also in de novo detection of-typically-milder, survivable forms of CHD, which are clinically suspected because of declining cardiac performance, cardiac events, or murmurs. Occasionally, adult CHD (ACHD) is found incidentally on scans performed for other indications (eg, trauma or neoplasm staging) because of improvements in computed tomographic technology and advanced visualization...
July 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28632652/utility-of-cardiac-magnetic-resonance-imaging-in-the-management-of-adult-congenital-heart-disease
#10
Giuseppe Muscogiuri, Aurelio Secinaro, Paolo Ciliberti, Megan Fuqua, Arni Nutting
The increasing number of patients with adult congenital heart disease (ACHD) calls for the development of noninvasive imaging techniques that allow a long-term evaluation of native and postsurgical anatomy and function. Echocardiography remains the imaging modality of choice for congenital heart disease, but it is affected by limited acoustic windows and poor tissue characterization. Cardiac computed tomography and cardiac catheter angiography are 2 valid alternatives for the anatomic and functional assessment of ACHD; however, both use ionizing radiation, and cardiac catheter angiography requires an invasive approach...
July 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28632651/imaging-in-adult-congenital-heart-disease
#11
Stephanie S Gaydos, Akos Varga-Szemes, Rochelle N Judd, Pal Suranyi, David Gregg
There has been tremendous growth in the population of adults with congenital heart disease (CHD) over the last few decades because of advances in medical care. Whereas some cases are cured during childhood, most patients instead undergo palliation, which leaves them at risk for late complications. Lifelong clinical follow-up involving serial multimodality imaging is helpful to monitor and guide the treatment of late complications. Imaging of these individuals is challenging because of their unique anatomy and therefore requires careful consideration on a case-by-case basis...
July 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28630248/chest-x-ray-of-a-patient-with-history-of-pleural-effusion
#12
Ewa Konik, John Schirger
The presented chest X-ray depicts the thoracic duct anatomy of a 50-year-old man who underwent heart transplantation. His postoperative course was complicated by Candida mediastinitis, treated with débridements and closure of the anterior chest wound with myocutaneous flaps. Postoperatively, he had persistent output from a right-sided chest tube. The fluid appeared milky and its triglycerides level was elevated at 254 mg/dL. The drainage persisted despite a low fat diet. The interventional radiologist identified a leak in the upper thoracic duct...
June 18, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28626939/technical-note-a-3-d-rendering-algorithm-for-electromechanical-wave-imaging-of-a-beating-heart
#13
Pierre Nauleau, Lea Melki, Elaine Wan, Elisa Konofagou
PURPOSE: Arrhythmias can be treated by ablating the heart tissue in the regions of abnormal contraction. The current clinical standard provides electroanatomic 3- D maps to visualize the elec-trical activation and locate the arrhythmogenic sources. However, the procedure is time-consuming and invasive. Electromechanical Wave Imaging is an ultrasound- based non-invasive technique that can provide 2-D maps of the electromechanical activation of the heart. In order to fully visualize the complex 3-D pattern of activation, several 2-D views are acquired and processed separately They are then manually registered with a 3-D rendering software to generate a pseudo-3-D map However, this last step is operator-dependent and time-consuming...
June 19, 2017: Medical Physics
https://www.readbyqxmd.com/read/28599825/left-ventricular-rotational-and-twist-mechanics-in%C3%A2-the-human-fetal-heart
#14
Ling Li, Mary Craft, Hao H Hsu, Ming Zhang, Berthold Klas, David A Danford, Shelby Kutty
BACKGROUND: The authors investigated left ventricular (LV) rotational indices, twist, and torsion in a large cohort of fetuses using two-dimensional speckle-tracking echocardiography. METHODS: Pregnant women (N = 102) were prospectively recruited for fetal two-dimensional speckle-tracking echocardiography. Because of variable fetal position, ventricular orientation was established using the location of the liver and LV position in relation to the right ventricle...
June 6, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28595607/a-composite-visualization-method-for-electrophysiology-morphous-merging-of-human-heart
#15
Fei Yang, Lei Zhang, Weigang Lu, Yue Zhang, Wangmeng Zuo, Kuanquan Wang, Henggui Zhang
BACKGROUND: Electrophysiological behavior is of great importance for analyzing the cardiac functional mechanism under cardiac physiological and pathological condition. Due to the complexity of cardiac structure and biophysiological function, visualization of a cardiac electrophysiological model compositively is still a challenge. The lack of either modality of the whole organ structure or cardiac electrophysiological behaviors makes analysis of the intricate mechanisms of cardiac dynamic function a difficult task...
June 8, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28590259/imaging-of-left-to-right-shunt-in-adults
#16
Nao Sasaki, Leo Lopez
PURPOSE OF REVIEW: Left-to-right shunts are commonly seen in congenital heart diseases. This review aims to review the anatomy, physiology, and imaging of the four most common left-to-right lesions in adults. RECENT FINDINGS: Reported late complications of left-to-right lesions provide guidance in follow-up imaging. Use of three-dimensional echocardiography helps not only in the diagnosis of these defects but also in assistance during device closure. SUMMARY: Noninvasive imaging plays a significant role in the diagnosis and management of left-to-right lesions...
June 3, 2017: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/28579017/whole-breast-nodal-irradiation-using-supine-vmat-and-prone-3d-planning-a-case-study
#17
Ashley Coffey, Lisa Renucci, Ashley Hunzeker, Nishele Lenards
The purpose of this study was to compare the variations in doses to the ipsilateral lung and heart between the supine whole breast and nodal volumetric-modulated arc therapy (VMAT) technique and the prone 3-dimensional conformal radiation therapy (3DCRT) technique. In this study, 3 patients who were simulated in the prone and supine positions were planned using supine VMAT and prone 3DCRT techniques to compare planning target volume (PTV) coverage as well as dose to organs at risk (ORs), including the heart and ipsilateral lung...
May 31, 2017: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/28577160/fascial-reinforcement-fixing-the-bronchi-to-the-heart-its-anatomy-and-clinical-significance
#18
Kozo Nakanishi, Hidenori Goto, Tomokazu Ito
PURPOSE: The details of the mediastinal fascia have been scarcely described and the bronchopericardial membrane is the only known structure that is present between the bronchi and the pericardium. However, the anatomical description of this structure is unclear. This study aimed to investigate the fascial structures between the bronchi and the pericardium based on surgical findings. METHODS: The connective tissues in the mid-mediastinum were observed surgically when lung lobectomy, including mediastinal lymph node dissection for lung cancer, was performed at our institute from April 2011 to March 2016...
June 2, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28574808/fetal-cardiac-us-techniques-and-normal-anatomy-correlated-with-adult-ct-and-mr-imaging
#19
Neel Patel, Evan Narasimhan, Anne Kennedy
Congenital heart disease (CHD) is an important cause of childhood mortality. Despite the widespread use of ultrasonography (US) as a screening tool, the prenatal detection rate is suboptimal. Improvement of the initial screening examination, which is performed in low-risk populations and often interpreted by community radiologists, targets a point in the screening process that is likely to have the largest population effect. If the goal of community-based screenings is to detect cases that may be abnormal and refer those to specialized centers for complete assessment, it is logical to use a checklist to confirm normal anatomy...
June 2, 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28570214/comparison-of-outcomes-of-root-replacement-procedures-and-supracoronary-techniques-for-surgical-repair-of-acute-aortic-dissection
#20
Matthew Valdis, Corey Adams, Michael W A Chu, Bob Kiaii, Linrui Guo
BACKGROUND: Surgical approach to type A acute aortic dissection (AADA) is usually dictated by the presenting anatomy. We compared long-term outcomes of AADA repaired with a root replacement versus a supracoronary tube graft, regardless of the proximal extent of the intimal tear. METHODS: A single-centre, retrospective cohort of consecutive patients undergoing repair of AADA between December 1999 and March 2012 were stratified based on the proximal surgical procedure performed: supracoronary tube graft or root replacement...
June 2017: Canadian Journal of Surgery. Journal Canadien de Chirurgie
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