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https://www.readbyqxmd.com/read/28339663/cardiac-involvement-in-granulomatosis-with-polyangiitis-a-magnetic-resonance-imaging-study-of-31-consecutive-patients
#1
Grégory Pugnet, Hervé Gouya, Xavier Puéchal, Benjamin Terrier, André Kahan, Paul Legmann, Loïc Guillevin, Olivier Vignaux
Objectives.: Specific cardiac involvement in granulomatosis with polyangiitis (GPA) is probably underestimated since many of these conditions are subclinical. The objective of this study was to assess the prevalence and patterns of cardiac abnormalities detected by cardiac MRI (CMRI) in patients with GPA. Methods.: Thirty-one consecutive patients with newly diagnosed or relapsing GPA underwent CMRI to assess morphological, functional, perfusion at rest and delayed enhancement abnormalities...
February 16, 2017: Rheumatology
https://www.readbyqxmd.com/read/28337725/comparison-of-diagnostic-performance-of-four-software-packages-for-phase-dyssynchrony-analysis-in-gated-myocardial-perfusion-spect
#2
Koichi Okuda, Kenichi Nakajima, Shinro Matsuo, Soichiro Kashiwaya, Hiroto Yoneyama, Takayuki Shibutani, Masahisa Onoguchi, Mitsumasa Hashimoto, Seigo Kinuya
BACKGROUND: Phase analysis of gated myocardial perfusion single-photon emission computed tomography (SPECT) for assessment of left ventricular (LV) dyssynchrony was investigated using the following dedicated software packages: Corridor4DM (4DM), cardioREPO (cREPO), Emory Cardiac Toolbox (ECTb), and quantitative gated SPECT (QGS). The purpose of this study was to evaluate the normal values of 95% histogram bandwidth, phase standard deviation (SD), and entropy and to compare the diagnostic performance of the four software packages...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28337698/the-importance-of-spect-myocardial-perfusion-imaging-in-clinical-practice-diagnosis-patient-education-and-evaluation-of-optimal-medical-therapy
#3
Takehiro Nakahara, Takuji Toyama, Masahiko Kurabayashi
No abstract text is available yet for this article.
March 23, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28333376/regulation-of-coronary-blood-flow
#4
Adam G Goodwill, Gregory M Dick, Alexander M Kiel, Johnathan D Tune
The heart is uniquely responsible for providing its own blood supply through the coronary circulation. Regulation of coronary blood flow is quite complex and, after over 100 years of dedicated research, is understood to be dictated through multiple mechanisms that include extravascular compressive forces (tissue pressure), coronary perfusion pressure, myogenic, local metabolic, endothelial as well as neural and hormonal influences. While each of these determinants can have profound influence over myocardial perfusion, largely through effects on end-effector ion channels, these mechanisms collectively modulate coronary vascular resistance and act to ensure that the myocardial requirements for oxygen and substrates are adequately provided by the coronary circulation...
March 16, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/28332179/reducing-radiation-to-patients-and-improving-image-quality-in-a-real-world-nuclear-cardiology-laboratory
#5
Stephen A Bloom, Karen Meyers
In part because of aging equipment and reduced reimbursement for imaging services in the last several years, nuclear cardiologists who remain in private practice face challenges in maintaining high quality and in reducing radiation exposure to patients. We review patient-centered approaches and affordable software solutions employed in our practice combined with supine-prone myocardial perfusion imaging to achieve increased interpretive confidence with reduced radiation exposure to patients.
March 22, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28332178/erratum-to-prognostic-impact-of-location-and-extent-of-vessel-related-ischemia-at-myocardial-perfusion-scintigraphy-in-patients-with-or-at-risk-for-coronary-artery-disease
#6
Francesco Nudi, Orazio Schillaci, Giandomenico Neri, Annamaria Pinto, Enrica Procaccini, Maurizio Vetere, Giacomo Frati, Fabrizio Tomai, Giuseppe Biondi-Zoccai
No abstract text is available yet for this article.
March 22, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28330661/association-between-high-sensitivity-cardiac-troponin-levels-and-myocardial-ischemia-during-mental-stress-and-conventional-stress
#7
Muhammad Hammadah, Ibhar Al Mheid, Kobina Wilmot, Ronnie Ramadan, Ayman Alkhoder, Malik Obideen, Naser Abdelhadi, Shuyang Fang, Ijeoma Ibeanu, Pratik Pimple, Heval Mohamed Kelli, Amit J Shah, Brad Pearce, Yan Sun, Ernest V Garcia, Michael Kutner, Qi Long, Laura Ward, J Douglas Bremner, Fabio Esteves, Paolo Raggi, David Sheps, Viola Vaccarino, Arshed A Quyyumi
OBJECTIVES: This study sought to investigate whether patients with mental stress-induced myocardial ischemia will have high resting and post-mental stress high-sensitivity cardiac troponin I (hs-cTnI). BACKGROUND: Hs-cTnI is a marker of myocardial necrosis, and its elevated levels are associated with adverse outcomes. Hs-cTnI levels may increase with exercise in patients with coronary artery disease. Mental stress-induced myocardial ischemia is also linked to adverse outcomes...
March 10, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28330657/diagnostic-accuracy-of-myocardial-perfusion-imaging-with-czt-technology-systemic-review-and-meta-analysis-of-comparison-with%C3%A2-invasive-coronary-angiography
#8
Francesco Nudi, Ami E Iskandrian, Orazio Schillaci, Mariangela Peruzzi, Giacomo Frati, Giuseppe Biondi-Zoccai
OBJECTIVES: This study sought to summarize the evidence on stress myocardial perfusion imaging (MPI) using cadmium-zinc-telluride (CZT) technology for the diagnosis of obstructive coronary artery disease (CAD). The CZT cameras are newly introduced, and comparative data with the conventional Anger technology (Anger-MPI) are lacking. BACKGROUND: The diagnostic accuracy of Anger-MPI for detection of angiographically significant CAD is well established; however, less evidence is available on the diagnostic accuracy of CZT-MPI...
March 10, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28329178/intraoperative-coronary-revision-but-not-coronary-pattern-is-associated-with-mortality-after-arterial-switch-operation%C3%A2
#9
Matteo Trezzi, Angelo Polito, Antonio Albano, Sonia B Albanese, Enrico Cetrano, Adriano Carotti
OBJECTIVES: We sought to determine differences in baseline characteristics and clinical outcomes in a consecutive series of patients undergoing arterial switch operation (ASO), assessing the effect of coronary anatomy on postoperative mortality, both overall and adjusted for surgical era. METHODS: From January 2000 to May 2015, 283 consecutive patients underwent ASO for transposition of the great arteries. A total of 103 patients (36.4%) had an associated ventricular septal defect and 23 (8...
March 18, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28329036/predictive-value-of-plaque-morphology-assessed-by-frequency-domain-optical-coherence-tomography-for-impaired-microvascular-perfusion-after-elective-stent-implantation-the-intracoronary-electrocardiogram-study
#10
Hiroki Ikenaga, Satoshi Kurisu, Tsukasa Nakao, Shingo Kono, Yoji Sumimoto, Noriaki Watanabe, Takashi Shimonaga, Tadanao Higaki, Toshitaka Iwasaki, Naoya Mitsuba, Ken Ishibashi, Yoshihiro Dohi, Yukihiro Fukuda, Yasuki Kihara
Aims: This study was undertaken to assess the association between plaque features at culprit lesions assessed by frequency-domain optical coherence tomography (FD-OCT) and impaired microvascular perfusion estimated by intracoronary electrocardiogram (IcECG) after elective percutaneous coronary intervention (PCI). Furthermore, we investigated whether IcECG could predict future cardiac events. Methods and results: This study consisted of 84 patients who underwent both FD-OCT and IcECG during PCI...
March 7, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28328285/intrapulmonary-artery-balloon-pulsation-improves-circulatory-function-after-acute-myocardial-infarction-in-pigs
#11
Rahma Ouardani, Nikos Magkoutis, Philippe Bonnin, Chantal Kang, Antoni W Kedra, Georgios Sideris, Michel Bonneau, Sebastian Voicu
AIM: To examine whether pulmonary artery balloon pulsation (PABP) could improve circulatory function in acute myocardial infarction (AMI) in pigs. METHODS/RESULTS: Ten downsize pigs were sedated and ventilated. AMI was induced by inserting a plug into the left anterior descending artery. A pulsation balloon was placed in the pulmonary artery in all animals. In the treatment group (TG), pulsations began when life-threatening arrhythmia or > 30% drop in mean blood pressure (MBP) or > 40% decrease in cardiac output compared to baseline occurred...
March 22, 2017: Acute Cardiac Care
https://www.readbyqxmd.com/read/28327159/the-clinical-use-of-stress-echocardiography-in-ischemic-heart-disease
#12
REVIEW
Rosa Sicari, Lauro Cortigiani
Stress echocardiography is an established technique for the assessment of extent and severity of coronary artery disease. The combination of echocardiography with a physical, pharmacological or electrical stress allows to detect myocardial ischemia with an excellent accuracy. A transient worsening of regional function during stress is the hallmark of inducible ischemia. Stress echocardiography provides similar diagnostic and prognostic accuracy as radionuclide stress perfusion imaging or magnetic resonance, but at a substantially lower cost, without environmental impact, and with no biohazards for the patient and the physician...
March 21, 2017: Cardiovascular Ultrasound
https://www.readbyqxmd.com/read/28325439/a-novel-myocardium-segmentation-approach-based-on-neutrosophic-active-contour-model
#13
Yanhui Guo, Guo-Qing Du, Jing-Yi Xue, Rong Xia, Yu-Hang Wang
BACKGROUND AND OBJECTIVES: Automatic delineation of the myocardium in echocardiography can assist radiologists to diagnosis heart problems. However, it is still challenging to distinguish myocardium from other tissue due to a low signal-to-noise ratio, low contrast, vague boundary, and speckle noise. The purpose of this study is to automatically detect myocardium region in left ventricle myocardial contrast echocardiography (LVMCE) images to help radiologists' diagnosis and further measurement on infarction size...
April 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28324970/development-of-data-acquisition-components-for-simultaneous-recording-of-3d-epicardial-and-surface-ecg-signals-in-the-langendorff-perfusion-apparatus
#14
Ryan Wade Selby, Anup Jonchhe, Chen Kaplan, Coeli M Lopes, Behnaz Ghoraani
Sudden Cardiac Death (SCD) claims 7 million lives per year. The importance of myocardial electrogram (EGM) repolarization alternans and surface electrocardiogram (ECG) T-wave alternans is gaining traction for understanding the underlying SCD mechanisms. However, the relationship between the 3D spatial distribution of myocardial EGMs and surface ECG with respect to SCD has yet to be investigated. To make this happen, a modified data acquisition system has been developed and fabricated in conjunction with the Langendorff perfusion system to enable simultaneous recording and analysis of the 3D spatial distribution of myocardial EGMs and the surface ECG...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28320607/diagnostic-value-of-st-segment-deviations-during-cardiac-exercise-stress-testing-systematic-comparison-of-different-ecg-leads-and-time-points
#15
Christian Puelacher, Max Wagener, Roger Abächerli, Ursina Honegger, Nundsin Lhasam, Nicolas Schaerli, Gil Prêtre, Ivo Strebel, Raphael Twerenbold, Jasper Boeddinghaus, Thomas Nestelberger, Maria Rubini Giménez, Petra Hillinger, Karin Wildi, Zaid Sabti, Patrick Badertscher, Janosch Cupa, Nikola Kozhuharov, Jeanne du Fay de Lavallaz, Michael Freese, Isabelle Roux, Jens Lohrmann, Remo Leber, Stefan Osswald, Damian Wild, Michael J Zellweger, Christian Mueller, Tobias Reichlin
BACKGROUND: Exercise ECG stress testing is the most widely available method for evaluation of patients with suspected myocardial ischemia. Its major limitation is the relatively poor accuracy of ST-segment changes regarding ischemia detection. Little is known about the optimal method to assess ST-deviations. METHODS: A total of 1558 consecutive patients undergoing bicycle exercise stress myocardial perfusion imaging (MPI) were enrolled. Presence of inducible myocardial ischemia was adjudicated using MPI results...
February 27, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28319503/myocardial-infarction-in-a-patient-with-hypertrophic-cardiomyopathy-but-normal-coronary-arteries
#16
Shuheng Li, Xiaoxin Sun, Zongyao Zhang, Zuo-Xiang He
A 57-year-old man with a history of hypertrophic cardiomyopathy diagnosed by echocardiography experienced atypical chest pain and dyspnea for 6 months. A rest Tc-MIBI myocardial SPECT imaging and a F-FDG myocardial PET/CT imaging were performed, which showed multiple matched myocardial perfusion/metabolism defects in the left ventricle, indicating scar tissue. Surprisingly, subsequent contrast coronary angiography revealed no significant coronary artery stenosis.
March 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28318875/feasibility-of-pet-for-the-management-of-coronary-artery-disease-comparison-between-cfr-and-ffr
#17
REVIEW
Osamu Manabe, Masanao Naya, Nagara Tamaki
Myocardial perfusion imaging using positron emission tomography (PET) allows both qualitative and quantitative measurement. The quantitative myocardial blood flow and coronary flow reserve (CFR) are reliable indices for evaluating functional severity, influenced by both epicardial stenosis and microvascular disease. Fractional flow reserve (FFR) also reflects physiological stenosis, which measures the pressure differences across a coronary artery stenosis during maximum hyperemia. Discordance between CFR and FFR has been noticed in estimating the functional significance of coronary stenosis...
March 16, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/28316034/updates-on-stress-imaging-testing-and-myocardial-viability-with-advanced-imaging-modalities
#18
REVIEW
Sandeep S Hedgire, Michael Osborne, Daniel J Verdini, Brian B Ghoshhajra
Non-invasive stress testing plays a key role in diagnosis and risk stratification in patients with coronary artery disease. Technical advances in CT, MRI, and PET have lead to increased utility of these modalities in myocardial perfusion imaging. The aim of the review is to provide a succinct update on CT, PET, and MRI for myocardial stress perfusion imaging.
April 2017: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28315079/an-incidental-finding-on-myocardial-perfusion-imaging-with-a-major-impact-in-altering-clinical-management
#19
Jarryd Whebell, Meroula Richardson, Benjamin Brady, Nathan Better
No abstract text is available yet for this article.
March 17, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28306335/prognostic-value-of-normal-positron-emission-tomography-myocardial-perfusion-imaging-in-patients-with-known-or-suspected-coronary-artery-disease-a-meta-analysis
#20
A'Di Chen, HaoSen Wang, Bing Fan, YaWei Xu, Wei Chen, Neng Dai
OBJECTIVE: Several studies have confirmed high diagnostic performance of positron emission tomography (PET) myocardial perfusion imaging (MPI) in patients with known or suspected coronary artery disease (CAD). However, whether the superior diagnostic accuracy could translate into improved mortality outcomes remains unknown. The aim of this study was to define the prognostic value of normal PET MPI. METHODS: PubMed and EMBASE were searched to identify related studies up to June 2016...
March 17, 2017: British Journal of Radiology
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