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Cardiac ultrasound

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https://www.readbyqxmd.com/read/28235974/acute-effects-of-glucagon-like-peptide-1-glp-19-36-amide-and-exenatide-on-mesenteric-blood-flow-cardiovascular-parameters-and-biomarkers-in-healthy-volunteers
#1
Lasse Bremholm, Ulrik B Andersen, Mads Hornum, Linda Hilsted, Simon Veedfald, Bolette Hartmann, Jens Juul Holst
Glucagon-like peptide-1 (GLP-1, GLP-17-36amide) and its sister peptide glucagon-like peptide 2 (GLP-2) influence numerous intestinal functions and GLP-2 greatly increases intestinal blood flow. We hypothesized that GLP-1 also stimulates intestinal blood flow and that this would impact on the overall digestive and cardiovascular effects of the hormone. To investigate the influence of GLP-1 receptor agonism on mesenteric and renal blood flow and cardiovascular parameters, we carried out a double-blinded randomized clinical trial...
February 2017: Physiological Reports
https://www.readbyqxmd.com/read/28229226/pericoronary-adipose-tissue-ratio-is-a-stronger-associated-factor-of-plaque-vulnerability-than-epicardial-adipose-tissue-on-coronary-computed-tomography-angiography
#2
Ryo Okubo, Rine Nakanishi, Mikihito Toda, Daiga Saito, Ippei Watanabe, Takayuki Yabe, Hideo Amano, Tatsushi Hirai, Takanori Ikeda
This study was designed to clarify the influence of pericoronary adipose tissue (PAT) on plaque vulnerability using coronary computed tomography angiography (CCTA). A total of 103 consecutive patients who underwent CCTA and subsequent percutaneous coronary intervention (PCI) using intravascular ultrasound (IVUS) for coronary artery disease were enrolled. The PAT ratio was calculated as the sum of the perpendicular thickness of the visceral layer between the coronary artery and the pericardium, or the coronary artery and the surface of the heart at the PCI site, divided by the PAT thickness without a plaque in the same vessel...
February 22, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28227204/ultrasound-plane-wave-imaging-with-delay-multiply-and-sum-beamforming-and-coherent-compounding
#3
Giulia Matrone, Alessandro S Savoia, Giosue Caliano, Giovanni Magenes, Giulia Matrone, Alessandro S Savoia, Giosue Caliano, Giovanni Magenes, Giulia Matrone, Giovanni Magenes, Alessandro S Savoia, Giosue Caliano
Improving the frame rate is an important aspect in medical ultrasound imaging, particularly in 3D/4D cardiac applications. However, an accurate trade-off between the higher frame rate and image contrast and resolution should be performed. Plane-Wave Imaging (PWI) can potentially achieve frame rates in the order of 10 kHz, as it uses a single unfocused plane wave (and thus a single transmit event) to acquire the image of the entire region of interest. The lack of transmit focusing however causes a significant drop of image quality, which can be restored by coherently compounding several tilted plane-wave frames, at the expense of the frame rate...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226689/patient-movement-compensation-for-3d-echocardiography-fusion
#4
Abhilash R Hareendranathan, Michelle Hanbidge, Allen He, Michelle Noga, Pierre Boulanger, Harald Becher, Kumaradevan Punithakumar, Abhilash R Hareendranathan, Michelle Hanbidge, Allen He, Michelle Noga, Pierre Boulanger, Harald Becher, Kumaradevan Punithakumar, Allen He, Pierre Boulanger, Harald Becher, Michelle Noga, Kumaradevan Punithakumar, Michelle Hanbidge, Abhilash R Hareendranathan
Limited field of view (FOV) is a major problem for 3D real-time echocardiography (3DRTE), which results in an incomplete representation of cardiac anatomy. Various image registration techniques have been proposed to improve the field of view in 3DRTE by fusing multiple image volumes. However, these techniques require significant overlap between the individual volumes and rely on high image resolution and high signal-to-noise ratio. Changes in the heart position due to patient movement during image acquisition can also reduce the quality of image fusion...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226687/towards-estimating-cardiac-motion-using-low-rank-representation-and-topology-preservation-for-ultrafast-ultrasound-data
#5
Angelica I Aviles, Thomas Widlak, Alicia Casals, Habib Ammari, Angelica I Aviles, Thomas Widlak, Alicia Casals, Habib Ammari, Habib Ammari, Thomas Widlak, Angelica I Aviles, Alicia Casals
Estimation of the cardiac motion is very important in order to detect heart diseases. This work presents a cardiac motion estimation approach using ultrafast ultrasound data. We optimize a variational framework which has the benefits of combining low-rank data representation with topology preservation. We show through the analysis of experimental results that this combination offers a radical reduction in computational time and noise while ensuring preservation of the anatomical structure of the heart under complex deformations...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226686/multiview-echocardiography-fusion-using-an-electromagnetic-tracking-system
#6
Kumaradevan Punithakumar, Abhilash R Hareendranathan, Riitta Paakkanen, Nehan Khan, Michelle Noga, Pierre Boulanger, Harald Becher, Kumaradevan Punithakumar, Abhilash R Hareendranathan, Riitta Paakkanen, Nehan Khan, Michelle Noga, Pierre Boulanger, Harald Becher, Harald Becher, Nehan Khan, Riitta Paakkanen, Michelle Noga, Kumaradevan Punithakumar, Abhilash R Hareendranathan, Pierre Boulanger
Three-dimensional ultrasound is an emerging modality for the assessment of complex cardiac anatomy and function. The advantages of this modality include lack of ionizing radiation, portability, low cost, and high temporal resolution. Major limitations include limited field-of-view, reliance on frequently limited acoustic windows, and poor signal to noise ratio. This study proposes a novel approach to combine multiple views into a single image using an electromagnetic tracking system in order to improve the field-of-view...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28224101/vein-of-galen-malformation-in-a-neonate-a-case-report-and-review-of-endovascular-management
#7
Surasak Puvabanditsin, Rajeev Mehta, Kristy Palomares, Natalie Gengel, Christina Ferrucci Da Silva, Sudipta Roychowdhury, Gaurav Gupta, Arun Kashyap, David Sorrentino
Vein of Galen malformation (VOGM) is a rare congenital vascular malformation caused by the maldevelopment of its embryonic precursor, the median prosencephalic vein of Markowski. VOGM results in neonatal morbidity and mortality, and premature delivery does not improve the outcome. We report a term female neonate in whom a vein of Galen malformation was diagnosed prenatally at 37 wk of gestation during a growth ultrasound and confirmed by fetal magnetic resonance imaging. Signs of cardiac decompensation were evident in the fetus...
February 8, 2017: World Journal of Clinical Pediatrics
https://www.readbyqxmd.com/read/28217069/can-ultrasound-guided-subcostal-transverse-abdominis-plane-block-be-used-as-sole-anesthetic-technique
#8
Pooja Bihani, Pradeep Bhatia, Swati Chhabra, Pradeepika Gangwar
Subcostal transverse abdominis plane (TAP) block anesthetizes area of the abdomen with cutaneous innervation of T6-T10 dermatomes. These abdominal field blocks become very advantageous when cardiac patient presents for noncardiac surgeries as sole anesthetic or as a part of multimodal anesthesia. A 58-year-male came for open surgical repair of subxiphoid incisional hernia developed post coronary artery bypass grafting (CABG). Echocardiography showed hypokinesia of left ventricle (LV) in the left anterior descending (LAD) artery territory, dilated LV, and ejection fraction of 30%, and coronary angiography after 6 months of CABG showed 70% stenosis of LAD...
January 2017: Saudi Journal of Anaesthesia
https://www.readbyqxmd.com/read/28214966/anomalous-coronary-arteries-and-myocardial-bridges-risk-stratification-in-children-using-novel-cardiac-catheterization-techniques
#9
Hitesh Agrawal, Silvana Molossi, Mahboob Alam, S Kristen Sexson-Tejtel, Carlos M Mery, E Dean McKenzie, Charles D Fraser, Athar M Qureshi
The evaluation of the vast majority of children with anomalous aortic origin of a coronary artery (AAOCA) and/or myocardial bridges is performed with non-invasive testing. However, a subset of these patients may benefit from invasive testing for risk stratification. All patients included in the Coronary Anomalies Program (CAP) at Texas Children's Hospital who underwent cardiac catheterization were included. Techniques included selective coronary angiograms (SCA), intravascular ultrasound (IVUS), and fractional flow reserve (FFR) measurements with provocative testing using adenosine and/or dobutamine infusions...
February 18, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28214482/catheter-directed-ultrasound-assisted-thrombolysis-is-a-safe-and-effective-treatment-for-pulmonary-embolism-even-in-high-risk-patients
#10
Kristen A Lee, Andrew Cha, Mark H Kumar, Combiz Rezayat, Clifford M Sales
OBJECTIVE: We sought to assess the early success and safety of catheter-directed, ultrasound-assisted (CDUA) thrombolysis for acute pulmonary embolism (PE) in patients deemed to be "high risk" for thrombolytic therapy. METHODS: A retrospective evaluation of patients who underwent CDUA pulmonary thrombolysis in our practice during 39 months is reported. There were 91 patients considered, all of whom presented with acute PE as diagnosed by computed tomography angiography...
March 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28213377/interventional-treatment-of-pulmonary-embolism
#11
David M Dudzinski, Jay Giri, Kenneth Rosenfield
Pulmonary embolism (PE) is a serious and prevalent cause of vascular disease. Nevertheless, optimal treatment for many phenotypes of PE remains uncertain. Treating PE requires appropriate risk stratification as a first step. For the highest-risk PE, presenting as shock or arrest, emergent systemic thrombolysis or embolectomy is reasonable, while for low-risk PE, anticoagulation alone is often chosen. Normotensive patients with PE but with indicia of right heart dysfunction (by biomarkers or imaging) constitute an intermediate-risk group for whom there is controversy on therapeutic strategy...
February 2017: Circulation. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28210489/arterial-ventricular-coupling-and-parameters-of-vascular-stiffness-in-hypertensive-patients-role-of-gender
#12
Luca Faconti, Rosa Maria Bruno, Simona Buralli, Marta Barzacchi, Elisa Dal Canto, Lorenzo Ghiadoni, Stefano Taddei
OBJECTIVE: Non-invasive estimation of arterial-ventricular coupling has been extensively used for the evaluation of cardiovascular performance, however, a relative small amount of data is available regarding arterial-ventricular coupling and its components in hypertension. The present study was designed to investigate the relationship between left ventricular elastance, arterial elastance, parameters of vascular stiffness and the influence of gender in a population of hypertensive individuals...
January 2017: JRSM Cardiovascular Disease
https://www.readbyqxmd.com/read/28208231/fast-left-ventricle-tracking-using-localized-anatomical-affine-optical-flow
#13
Sandro Queirós, João L Vilaça, Pedro Morais, Jaime C Fonseca, Jan D'hooge, Daniel Barbosa
In daily clinical cardiology practice, left ventricle (LV) global and regional function assessment is crucial for disease diagnosis, therapy selection and patient follow-up. Currently, this is still a time-consuming task, spending valuable human resources. In this work, a novel fast methodology for automatic LV tracking is proposed based on localized anatomically constrained affine optical flow. This novel method can be combined to previously proposed segmentation frameworks or manually delineated surfaces at an initial frame to obtain fully delineated datasets and, thus, assess both global and regional myocardial function...
February 16, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/28207948/right-sided-aortic-arch-in-the-age-of-microarray
#14
Edward F O'Mahony, Darren P Hutchinson, George McGillivray, Debbie L Nisbet, Ricardo Palma-Dias
OBJECTIVE: For fetuses with a diagnosis of right aortic arch and normal cardiac anatomy we aimed to establish the frequency of chromosomal anomaly diagnosed with SNP microarray analysis, particularly focusing on microduplications or microdeletions which would have gone undetected by conventional karyotyping and 6 probe fish (13,18,21, X,Y, TUPLE). METHOD: Retrospective study of fetal ultrasounds between 2011 and 2016 in an Australian tertiary referral centre. Outcomes of interest were survival and postnatal surgery for vascular ring...
February 16, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28207446/why-anesthesiologists-must-incorporate-focused-cardiac-ultrasound-into-daily-practice
#15
Bradley J Coker, Josh M Zimmerman
The size, availability, cost, and quality of modern ultrasound devices have, for the first time in modern medicine, enabled point-of-care ultrasound by the noncardiologist physician. The appropriate application of focused cardiac ultrasound (FoCUS) by anesthesiologists has the potential to alter management and affect outcomes for a wide range of patients. In this article, the indications, benefits, and limitations of FoCUS are described. The training and equipment required to perform FoCUS are also discussed...
March 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28204915/-acute-chest-pain-and-new-ecg-changes-in-pacemaker-patients-a%C3%A2-clinical-challenge
#16
Matthias Hoyme, Ralf Surber, P Christian Schulze, Dirk Prochnau
We report the case of a 82-year-old woman who was admitted to our institution with acute chest pain, nausea, and vomiting. Because of atrial fibrillation with intermittent bradycardia, a single-chamber pacemaker was implanted 4 years ago. The initial 12-lead ECG showed atrial fibrillation with a heart rate of 70 bpm, narrow QRS, and T‑wave inversions in the inferolateral leads. Coronary artery disease was excluded by immediate cardiac catheterization. A subsequent ECG three hours later showed a ventricular paced rhythm...
February 15, 2017: Herzschrittmachertherapie & Elektrophysiologie
https://www.readbyqxmd.com/read/28202440/exposure-to-placental-ischemia-impairs-postpartum-maternal-renal-and-cardiac-function-in-rats
#17
Nina D Paauw, Jaap A Joles, Frank T Spradley, Bhavisha Bakrania, Zsuzsanna K Zellenger, Arie Franx, Marianne C Verhaar, Joey P Granger, A Titia Lely
INTRODUCTION: Women with a history of preeclampsia (PE) have an increased risk to develop cardiovascular and renal diseases later in life, but the mechanisms underlying this effect are unknown. In rats, we assessed whether placental ischemia results in long-term effects on the maternal cardiovascular and renal systems using the Reduced Uterine Perfusion Pressure (RUPP) model for PE. METHODS: Sprague-Dawley rats received either a SHAM or RUPP operation at gestational day 14...
February 15, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28198536/prevalence-of-risk-factors-and-asymptomatic-carotid-atherosclerosis-in-diabetic-patients-screened-for-silent-myocardial-ischemia-by-spect-myocardial-imaging
#18
Irena Peovska Mitevska, Natalija Baneva, Marijan Bosevski, Elizabeta Srbinovska Kostovska
BACKGROUND: The aim of the study was to evaluate whether there is any association between myocardial ischemia, common risk factors and carotid artery ultrasound parameters in asymptomatic type 2 diabetic (DMT2) patients. MATERIAL AND METHODS: 60 asymptomatic DMT2 patients (pts) without known coronary artery disease (CAD) underwent one day rest Dypiridamole stress Tc-99m sestamibi single photon emission computed tomography myocardial perfusion scintigraphy (MPS)...
2017: Nuclear Medicine Review. Central & Eastern Europe
https://www.readbyqxmd.com/read/28195993/subcutaneous-testosterone-letrozole-therapy-before-and-concurrent-with-neoadjuvant-breast-chemotherapy-clinical-response-and-therapeutic-implications
#19
Rebecca L Glaser, Anne E York, Constantine Dimitrakakis
OBJECTIVE: Hormone receptor-positive breast cancers respond favorably to subcutaneous testosterone combined with an aromatase inhibitor. However, the effect of testosterone combined with an aromatase inhibitor on tumor response to chemotherapy was unknown. This study investigated the effect of testosterone-letrozole implants on breast cancer tumor response before and during neoadjuvant chemotherapy. METHODS: A 51-year-old woman on testosterone replacement therapy was diagnosed with hormone receptor-positive invasive breast cancer...
February 13, 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/28195441/imaging-of-the-vasa-nervorum-using-contrast-enhanced-ultrasound
#20
Adnan I Qureshi, Muhammad A Saleem, Asad Ahrar, Faisal Raja
INTRODUCTION: We describe the use of intravenous contrast-enhanced ultrasonography to study vasa nervorum using contrast-enhanced ultrasound. METHODS: We imaged the median, femoral, or sciatic nerves in 4 patients in longitudinal plane using high-resolution ultrasound after intravenous bolus of activated Perflutren lipid microspheres. The images were acquired as photopic images (in brown color) in real time using 2-dimensional B-Flow mode scan within a selected region of interest...
February 14, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
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