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Cardiac computed tomography

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https://www.readbyqxmd.com/read/28214153/arrhythmogenic-right-ventricular-dysplasia-atypical-clinical-presentation
#1
José Marçalo, Luiz Menezes Falcão
A 67-year-old man was admitted to our hospital after episodes of syncope preceded by malaise and diffuse neck and chest discomfort. No family history of cardiac disease was reported. Laboratory workup was within normal limits, including D-dimers, serum troponin I and arterial blood gases. The electrocardiogram showed sinus rhythm with T-wave inversion in leads V1 to V3. Computed tomography angiography to investigate pulmonary embolism showed no abnormal findings. Transthoracic echocardiography (TTE) displayed massive enlargement of the right ventricle with intact interatrial septum and no pulmonary hypertension...
February 14, 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/28213948/hourglass-shaped-right-ventricle-and-localized-constrictive-pericarditis
#2
Alper Karakus, Hasan Ari, Sencer Camci, Selma Ari, Ahmet Tutuncu, Mehmet Melek
Constrictive pericarditis is characterized by thick pericardial fibrosis and frequent calcification that progressively impairs diastolic filling of the heart. The diagnosis of constrictive pericarditis has been challenging even though multiple diagnostic modalities have been developed. The diagnosis of constructive pericarditis is especially difficult in localized constrictive pericarditis which is extremely rare. We report a case of localized constrictive pericarditis with a 3D multislice cardiac computed tomography (CT) finding of the constrictive band causing strangulation and hourglass shaping of the right ventricle...
February 18, 2017: Echocardiography
https://www.readbyqxmd.com/read/28212053/transthoracic-echocardiography-pitfalls-and-limitations-as-delineated-at-cardiac-ct-and-mr-imaging
#3
Sachin B Malik, Natalie Chen, Rex A Parker, Joe Y Hsu
Transthoracic echocardiography ( TTE transthoracic echocardiography ) is a critical tool in the field of clinical cardiology. It often serves as one of the first-line imaging modalities in the evaluation of cardiac disease owing to its low cost, portability, widespread availability, lack of ionizing radiation, and ability to evaluate both anatomy and function of the heart. Consequently, a large majority of patients undergoing a cardiac computed tomography (CT) or magnetic resonance (MR) imaging examination will have a TTE transthoracic echocardiography available for review...
February 17, 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28210637/anomalous-origin-of-the-left-coronary-artery-from-the-pulmonary-artery-an-uncommon-coronary-anomaly-with-serious-implications-in-adulthood
#4
Venkat Gangadharan, Kamesh Sivagnanam, Ghulam Murtaza, Michael Ponders, Otto Teixeira, Timir Paul
A 36-year-old woman was seen with complaints of exertional chest pain and shortness of breath. Her medical history included atrial fibrillation and diabetes. Physical examination was unremarkable except for an irregular cardiac rhythm. Myocardial perfusion imaging revealed the presence of a large area of infarction involving the entire anterior and apical walls and part of the anteroseptal wall with minimal periinfarct ischemia. Computed tomography coronary angiogram revealed an anomalous left main coronary artery arising from the main pulmonary artery...
January 2017: Journal of Investigative Medicine High Impact Case Reports
https://www.readbyqxmd.com/read/28205119/use-of-three-dimensional-computed-tomography-overlay-for-real-time-cryoballoon-ablation-in-atrial-fibrillation-reduces-radiation-dose-and-contrast-dye
#5
B Oude Velthuis, M Molenaar, H G Reinhart Dorman, J Y Stevenhagen, M F Scholten, J van der Palen, J M van Opstal
AIMS: Cryoballoon pulmonary vein (PV) isolation in patients with atrial fibrillation has proven to be effective in short-term and long-term follow-up. To visualise the PV anatomy, pre-ablation contrast pulmonary venography is commonly performed. Three-dimensional (3D) computed tomography (CT) overlay is a new technique creating a live 3D image of the left atrium by integrating a previously obtained CT scan during fluoroscopy. To evaluate the benefits of 3D CT overlay during cryoballoon ablation, we studied the use of 3D CT overlay versus contrast pulmonary venography in a randomised fashion in patients with paroxysmal atrial fibrillation undergoing cryoballoon PV isolation...
February 15, 2017: Netherlands Heart Journal
https://www.readbyqxmd.com/read/28205073/multi-modality-imaging-bird-s-eye-view-from-the-2016-american-heart-association-scientific-sessions
#6
Wael A AlJaroudi, Steven G Lloyd, Farooq A Chaudhry, Fadi G Hage
This review summarizes key imaging studies that were presented in the American Heart Association Scientific Sessions 2016 related to the fields of nuclear cardiology, cardiac computed tomography, cardiac magnetic resonance, and echocardiography. This bird's eye view will inform readers about multiple studies from these different modalities. We hope that this general overview will be useful for those that did not attend the conference as well as to those that did since it is often difficult to get exposure to many abstracts at large meetings...
February 15, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28202247/radiological-characteristics-of-atrial-myxoma-in-cardiac-computed-tomography
#7
Kawa Haji, Arthur Nasis
BACKGROUND: Although the primary role of Cardiac Computed Tomography (CCT) is assessment of the coronary arteries, the technique also allows detailed examination of cardiac structures and other cardiac pathologies including cardiac myxoma. However, limited data exists regarding the CCT characteristics of cardiac myxoma. OBJECTIVE: To describe the radiological characteristics of a series of cardiac myxomas in CCT. METHODS: We retrospectively identified all patients at our tertiary urban referral centre with cardiac myxoma on CCT over a seven-year period between July 2008 and July 2015...
February 7, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28202051/variability-of-radiation-doses-of-cardiac-diagnostic-imaging-tests-the-radio-evinci-study-radiationdose-subproject-of-the-evinci-study
#8
Clara Carpeggiani, Eugenio Picano, Marco Brambilla, Claudio Michelassi, Juhani Knuuti, Philipp Kauffman, S Richard Underwood, Danilo Neglia
BACKGROUND: Patients with coronary artery disease can accumulate significant radiation dose through repeated exposures to coronary computed tomographic angiography, myocardial perfusion imaging with single photon emission computed tomography or positron emission tomography, and to invasive coronary angiography. Aim of the study was to audit radiation doses of coronary computed tomographic angiography, single photon emission computed tomography, positron emission tomography and invasive coronary angiography in patients enrolled in the prospective, randomized, multi-centre European study-EVINCI (Evaluation of Integrated Cardiac Imaging for the Detection and Characterization of Ischemic Heart Disease)...
February 16, 2017: BMC Cardiovascular Disorders
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
#9
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/28198527/coexistence-of-bicuspid-aortic-valve-aberrant-right-subclavian-artery-and-common-origin-of-carotid-arteries
#10
Paweł Tyczyński, Ilona Michałowska, Aneta Fronczak, Rafał Wolny, Hubert Łazarczyk, Zbigniew Chmielak, Adam Witkowski
BACKGROUND: Prevalence of bicuspid aortic valve (BAV) and right aberrant subclavian artery (ASA) separately is relatively common in general population, and much higher in some disorders. Surprisingly, coexistence of both valve and vessel anomalies has only been reported in single cases. METHODS: From 2008 to 2016, in a single, high-volume tertiary cardiac center, patients who underwent chest computed tomography or magnetic resonance imaging for various reasons, were retrospectively screened for the presence of right ASA...
February 15, 2017: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/28198517/a-monte-carlo-study-for-optimizing-the-detector-of-spect-imaging-using-a-xcat-human-phantom
#11
Mohammad Khoshakhlagh, Jalil Pirayesh Islamian, Seyyed Mohammad Abedi, Babak Mahmoudian, Masoud Shayesteh Azar
BACKGROUND: Acquiring a high quality image has assigned an important concern for obtaining accurate diagnosis in nuclear medicine. Detector is a critical component of Single Photon Emission Computed Tomography (SPECT) imaging system for giving accurate information from exact pattern of radionuclide distribution in the target organ. The images are strongly affected by the attenuation, scattering, and response of the detector. The conventional detector is mainly made from sodium iodide activated by thallium [NaI(Tl)] in nuclear medicine imaging...
2017: Nuclear Medicine Review. Central & Eastern Europe
https://www.readbyqxmd.com/read/28197975/research-of-predictive-factors-for-cardiac-resynchronization-therapy-a-prospective-study-comparing-data-from-phase-analysis-of-gated-myocardial-perfusion-single-photon-computed-tomography-and-echocardiography-trying-to-anticipate-response-to-crt
#12
Rémy Gendre, O Lairez, P Mondoly, A Duparc, D Carrié, M Galinier, I Berry, T Cognet
BACKGROUND: Cardiac resynchronization therapy (CRT) reduces morbidity and mortality in chronic systolic heart failure. About 20% of implanted patients are considered as "non-responders". This study aimed to evaluate gated myocardial perfusion single-photon emission computed tomography (GMPS) phase parameters as compared to echocardiography in the assessment of predictors for response to CRT before and after CRT activation. METHODS: Forty-two patients were prospectively included during 15 months...
February 14, 2017: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/28195969/acute-mesenteric-ischemia-among-postcardiac-surgery-patients-presenting-with-multiple-organ-failure
#13
Alexis Guillaume, Sébastien Pili-Floury, Sidney Chocron, Eric Delabrousse, Bénédicte De Parseval, Stephane Koch, Emmanuel Samain, Gilles Capellier, Gaël Piton
BACKGROUND: Acute mesenteric ischemia (AMI) is a rare but severe complication after cardiac surgery. However, AMI is likely to be more frequent in the subgroup of patients presenting with multiple organ failure after a cardiac surgery. The primary objective of this study was to identify AMI risk factors among patients requiring intensive care unit (ICU) admission after cardiac surgery. METHODS: Retrospective observational study of all the patients requiring admission to two ICUs in a large university hospital after a cardiac surgery procedure...
March 2017: Shock
https://www.readbyqxmd.com/read/28191375/self-inflicted-cardiac-injury-with-nail-gun-without-hemodynamic-compromise-a-case-report
#14
Simon Ho, Bo Liu, Nicholas Feranec
Pneumatically powered nail guns have been used in construction since 1959. Penetrating injuries to the heart with nail guns have a wide range of presentations from asymptomatic to cardiac tamponade and exsanguination. Mortality related to cardiac nail gun injuries is similar to knife injuries, estimated at 25%. Surgical exploration is the treatment of choice. We describe a case of self-inflicted nail gun injury to the chest without hemodynamic compromise in a 51-year-old man. Computed tomography (CT) imaging confirmed nail penetrating the right ventricle, with the tip adjacent to but not violating the abdominal aorta...
January 10, 2017: Curēus
https://www.readbyqxmd.com/read/28188475/myocardial-perfusion-imaging-with-pet
#15
Roel S Driessen, Pieter G Raijmakers, Wijnand J Stuijfzand, Paul Knaapen
Noninvasive assessment of coronary artery disease remains a challenging task, with a large armamentarium of diagnostic modalities. Myocardial perfusion imaging (MPI) is widely used for this purpose whereby cardiac positron emission tomography (PET) is considered the gold standard. Next to relative radiotracer distribution, PET allows for measurement of absolute myocardial blood flow. This quantification of perfusion improves diagnostic accuracy and prognostic value. Cardiac hybrid imaging relies on the fusion of anatomical and functional imaging using coronary computed tomography angiography and MPI, respectively, and provides incremental value as compared with either stand-alone modality...
February 10, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28185172/-18-f-fdg-pet-ct-angiography-for-the-diagnosis-of-infective-endocarditis
#16
REVIEW
A Roque, M N Pizzi, H Cuéllar-Calàbria, S Aguadé-Bruix
PURPOSE OF REVIEW: This article reviews the current imaging role of (18)F-fluordeoxyglucose positron emission computed tomography ((18)F-FDG-PET/CT) combined with cardiac CT angiography (CTA) in infective endocarditis and discusses the strengths and limitations of this technique. RECENT FINDINGS: The diagnosis of infective endocarditis affecting prosthetic valves and intracardiac devices is challenging because echocardiography and, therefore, the modified Duke criteria have well-recognized limitations in this clinical scenario...
February 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28183438/cardiac-imaging-for-assessing-low-gradient-severe-aortic-stenosis
#17
REVIEW
Marie-Annick Clavel, Ian G Burwash, Philippe Pibarot
Up to 40% of patients with aortic stenosis (AS) harbor discordant Doppler-echocardiographic findings, the most common of which is the presence of a small aortic valve area (≤1.0 cm(2)) suggesting severe AS, but a low gradient (<40 mm Hg) suggesting nonsevere AS. The purpose of this paper is to present the role of multimodality imaging in the diagnostic and therapeutic management of this challenging entity referred to as low-gradient AS. Doppler-echocardiography is critical to determine the subtype of low-gradient AS: that is, classical low-flow, paradoxical low-flow, or normal-flow...
February 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28183285/early-detection-of-myocardial-infarction-following-blunt-chest-trauma-by-computed-tomography-a-case-report
#18
Thung-Lip Lee, Chin-Feng Hsuan, Chen-Hsiang Shih, Huai-Wen Liang, Hsing-Shan Tsai, Wei-Kung Tseng, Kwan-Lih Hsu
BACKGROUND: Blunt cardiac trauma encompasses a wide range of clinical entities, including myocardial contusion, cardiac rupture, valve avulsion, pericardial injuries, arrhythmia, and even myocardial infarction. Acute myocardial infarction due to coronary artery dissection after blunt chest trauma is rare and may be life threatening. Differential diagnosis of acute myocardial infarction from cardiac contusion at this setting is not easy. CASE PRESENTATION: Here we demonstrated a case of blunt chest trauma, with computed tomography detected myocardium enhancement defect early at emergency department...
February 10, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28178121/a-case-report-of-congenital-umbilical-arteriovenous-malformation-complicated-with-liver-failure-after-surgical-excision
#19
Ji-Won Han, Hyun-Young Kim, Sung-Eun Jung
RATIONALE: Few case reports of umbilical arteriovenous malformation (AVM) have been reported. Herein, we report a neonatal case of umbilical AVM who underwent liver failure after surgical excision. PATIENT CONCERNS: The patient was a girl delivered at a gestational age of 39+5 weeks showing cyanosis and heart murmur. DIAGNOSES: Cardiac echography, abdominal ultrasonography (USG), and computed tomography revealed suspecting the umbilical AVM...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28176490/diversity-and-determinants-of-the-three-dimensional-anatomical-axis-of-the-heart-as-revealed-using-multidetector-row-computed-tomography
#20
Shumpei Mori, Robert H Anderson, Natsuko Tahara, Yu Izawa, Takayoshi Toba, Sei Fujiwara, Shinsuke Shimoyama, Yoshiaki Watanabe, Tatsuya Nishii, Atsushi K Kono, Ken-Ichi Hirata
The location of the heart within the thorax varies significantly between individuals. The resultant diversity of the anatomical cardiac long axis, however, and its determinants, have yet to be systematically investigated. We enrolled 100 consecutive patients undergoing coronary arterial computed tomographic angiography, decomposing the vector of the anatomical cardiac long axis by projecting it to horizontal, frontal, and sagittal planes. The projected vectors on each plane were then converted into three rotation angles using coordinate transformation...
February 8, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
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