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Myocardial perfusion scan

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https://www.readbyqxmd.com/read/29651739/prognostic-utility-of-splenic-response-ratio-in-dipyridamole-pet-myocardial-perfusion-imaging
#1
Karan Bami, Shrankhala Tewari, Fadi Guirguis, Linda Garrard, Ann Guo, Alomgir Hossain, Terrence D Ruddy, Rob S B Beanlands, Robert A deKemp, Benjamin J W Chow, Girish Dwivedi
BACKGROUND: Cardiac magnetic resonance perfusion studies with adenosine stress have shown that splenic response can identify patients with inadequate pharmacologic stress. We investigate the incremental prognostic impact of splenic response ratio (SRR) in patients with normal Rubidium (Rb)-82 PET myocardial perfusion imaging (MPI). METHODS: Consecutive patients undergoing dipyridamole Rb-82 PET MPI for the evaluation of coronary artery disease were screened. Spleen and liver Rb-82 activity was measured and the SRR was calculated: SRR = (Spleen stress/Liver stress)/(Spleen rest/Liver rest)...
April 12, 2018: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29598851/first-magnetic-resonance-managed-by-a-cardiology-department-in-the-spanish-public-healthcare-system-experience-and-difficulties-of-an-innovative-model
#2
Manuel Barreiro-Pérez, Elena Tundidor-Sanz, Ana Martín-García, Elena Díaz-Peláez, Alberto Íscar-Galán, Soraya Merchán-Gómez, María Gallego-Delgado, Javier Jiménez-Candil, Ignacio Cruz-González, Pedro L Sánchez
Magnetic resonance (MR) is considered the gold standard in the assessment of myocardial morphology, function, perfusion, and viability. However, its main limitation is its scarce availability. In 2014, we installed the first MR scanner exclusively managed by a cardiology department within the publicly-funded Spanish healthcare system with the aim of improving patient-care, training and research in the department. In the time interval analyzed, July 2014 to May 2017, 3422 cardiac MR scans were performed (32minutes used per study; 96% with good quality; 75% with contrast media administration)...
March 26, 2018: Revista Española de Cardiología
https://www.readbyqxmd.com/read/29589206/saline-push-improves-rubidium-82-pet-image-quality
#3
Jennifer M Renaud, Kai Yi Wu, Kimberly Gardner, May Aung, Rob S B Beanlands, Robert A deKemp
INTRODUCTION: Rubidium-82 (82 Rb) PET is used widely for myocardial perfusion imaging. The purpose of this study was to investigate if an additional saline-push following the82 Rb elution improves PET image quality. METHODS: 82 Rb PET scans were acquired with and without 26 mL saline-push in six patients as part of a clinical quality improvement program. Dynamic images were analyzed to measure the total activity delivered to the superior vena cava (SVC) and retained in the left ventricle (LV) myocardium...
March 27, 2018: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29578927/minimal-starting-time-of-data-reconstruction-for-qualitative-myocardial-perfusion-rubidium-82-positron-emission-tomography-imaging
#4
Joris D van Dijk, Eline D Huizing, Jorn A van Dalen, Jorik R Timmer, Pieter L Jager
OBJECTIVE: Qualitative positron emission tomography (PET) myocardial perfusion imaging (MPI) scans are reconstructed with a delay after an injection of rubidium-82 (Rb) to ensure blood pool clearance and sufficient left ventricle to myocardium contrast. Our aim was to derive the minimal starting time of data reconstruction (STDR) after an injection of Rb for which the diagnostic value and image quality remained unaffected. MATERIALS AND METHODS: We retrospectively included 23 patients who underwent rest-stress Rb PET MPI using 740 MBq...
March 23, 2018: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/29550846/is-there-an-incremental-value-to-use-myocardial-perfusion-imaging-with-or-without-ct-attenuation-for-the-diagnosis-of-coronary-artery-disease-a-study-in-chinese-patients
#5
Wen Chong Xin, Xiao Liang Shao, Yue Tao Wang, Jian Feng Wang, Xiao Song Wang, Ling Yang, Wei Yang, Fei Fei Zhang
OBJECTIVE: To evaluate whether computed tomography attention correction (CTAC) has incremental diagnostic value for single photon emission tomography (SPET) myocardial perfusion imaging (MPI) for the detection of coronary artery disease (CAD) in Chinese patients. SUBJECTS AND METHODS: This retrospective study consisted of 181 suspected CAD patients who underwent one-stop SPET examination by MPI combined with a CT scan. Two observers independently evaluated non-attenuation correction (NAC) and CTAC MPI images, and coronary angiography (CAG) results were used as reference standards...
March 20, 2018: Hellenic Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/29546491/how-variable-are-the-volumetric-measurements-from-gated-perfusion-spect-when-a-one-day-stress-rest-protocol-is-used
#6
C Fielder Camm, Alexander Emery, Elizabeth Rose-Innes, Sergei Pavlitchouk, Nikant Sabharwal, Andrew D Kelion
BACKGROUND: Using myocardial perfusion scintigraphy (MPS), an increase in left ventricular (LV) volumes or a decrease in ejection fraction (EF) from rest to stress may be clinically important. The variation in these measures between the low-dose stress acquisition and high-dose rest acquisition in a one-day stress-rest protocol has not been established. We assessed the reproducibility of gated volumetric indices between stress and rest and the normal variation in ungated TID ratio for a one-day stress-rest99m Tc-tetrofosmin protocol...
March 15, 2018: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29492838/prevalence-and-variability-in-reporting-of-clinically-actionable-incidental-findings-on-attenuation-correction-ct-scans-in-a-veteran-population
#7
B Julie He, Brian J Malm, Michelle Carino, Mehran M Sadeghi
BACKGROUND: Myocardial perfusion imaging (MPI) often employs attenuation-correction computed tomography (CTAC) to reduce attenuation artifacts and improve specificity. While there is no specific guideline on how they should be reported, incidental noncardiac findings identified on these scans may be clinically significant. The prevalence of these findings in veterans is not currently known. In addition, variability in reporting these findings may depend on the interpreting physician's specialty...
February 28, 2018: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29461753/-kawasaki-disease-an-update
#8
Sabrina Bressieux-Degueldre, Damien Schaffner, Michaël Hofer, Nicole Sekarski, Federica Vanoni
The cause of Kawasaki disease (KD) is still unknown, but an infectious origin and genetic susceptibility have been suggested. The American Heart Association has changed the guidelines for diagnosis and treatment of KD in 2017. One goal is to better identify patients most at risk, particularly young children with « incomplete » KD. In case of intravenous immunoglobulin resistance, alternative treatments to the traditional use of corticosteroids, such as TNF-alpha inhibitors have been proposed. For all patients with coronary aneurisms, regular assessment of myocardial perfusion is recommended, either with stress echocardiography, MRI, scintigraphy or PET-scan...
February 14, 2018: Revue Médicale Suisse
https://www.readbyqxmd.com/read/29454774/incremental-diagnostic-value-of-stress-computed-tomography-myocardial-perfusion-with-whole-heart-coverage-ct-scanner-in-intermediate-to-high-risk-symptomatic-patients-suspected-of-coronary-artery-disease
#9
Gianluca Pontone, Daniele Andreini, Andrea I Guaricci, Andrea Baggiano, Fabio Fazzari, Marco Guglielmo, Giuseppe Muscogiuri, Claudio Maria Berzovini, Annalisa Pasquini, Saima Mushtaq, Edoardo Conte, Giuseppe Calligaris, Stefano De Martini, Cristina Ferrari, Stefano Galli, Luca Grancini, Paolo Ravagnani, Giovanni Teruzzi, Daniela Trabattoni, Franco Fabbiocchi, Alessandro Lualdi, Piero Montorsi, Mark G Rabbat, Antonio L Bartorelli, Mauro Pepi
OBJECTIVES: The goal of this study was to evaluate the diagnostic accuracy of stress computed tomography myocardial perfusion (CTP) for the detection of functionally significant coronary artery disease (CAD) by using invasive coronary angiography (ICA) plus invasive fractional flow reserve (FFR) as the reference standard in consecutive intermediate- to high-risk symptomatic patients. BACKGROUND: Stress CTP recently emerged as a potential strategy to combine the anatomic and functional evaluation of CAD in a single scan...
February 9, 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29447342/diagnosing-coronary-artery-disease-after-a-positive-coronary-computed-tomography-angiography-the-dan-nicad-open-label-parallel-head-to-head-randomized-controlled-diagnostic-accuracy-trial-of-cardiovascular-magnetic-resonance-and-myocardial-perfusion-scintigraphy
#10
L Nissen, S Winther, J Westra, J A Ejlersen, C Isaksen, A Rossi, N R Holm, G Urbonaviciene, L C Gormsen, L H Madsen, E H Christiansen, M Maeng, L L Knudsen, L Frost, L Brix, H E Bøtker, S E Petersen, M Bøttcher
Aims: Perfusion scans after coronary computed tomography angiography (CCTA) in patients with suspected coronary artery disease (CAD) may reduce unnecessary invasive coronary angiographies (ICAs). However, the diagnostic accuracy of perfusion scans after primary CCTA is unknown. The aim of this study was to determine the diagnostic accuracy of cardiac magnetic resonance (CMR) and myocardial perfusion scintigraphy (MPS) against ICA with fractional flow reserve (FFR) in patients suspected of CAD by CCTA...
February 13, 2018: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29416252/perioperative-use-of-transthoracic-echocardiography-in-a-patient-with-congenitally-corrected-transposition-of-great-arteries-atrial-septal-defect-and-severe-pulmonary-stenosis-for-lower-segment-cesarean-section
#11
Vikas Saini, Tanvir Samra, Gurpreet Kaur
A 25-year-old female with congenitally corrected transposition of great arteries (CCTGAs), atrial septal defect, and severe pulmonary stenosis underwent lower segment cesarean section at 34 weeks of gestation using combined spinal epidural anesthesia (CSEA). We used transthoracic echocardiography (TTE) for intraoperative monitoring of the cardiovascular system because these patients are reported to have a high prevalence of myocardial perfusion defects, regional wall motion abnormalities, and impaired ventricular contractility...
October 2017: Journal of Anaesthesiology, Clinical Pharmacology
https://www.readbyqxmd.com/read/29360694/attenuation-correction-in-myocardial-perfusion-imaging-affects-the-assessment-of-infarct-size-in-women-with-previous-inferior-infarct
#12
Alessia Peli, Luca Camoni, Valentina Zilioli, Rexhep Durmo, Mattia Bonacina, Francesco Bertagna, Barbara Paghera, Raffaele Giubbini
BACKGROUND: Myocardial perfusion imaging is a well-established diagnostic tool in patients with known or suspected coronary artery disease. Numerous clinical trials have shown that attenuation correction (AC) in single photon emission computed tomography (SPECT) improves the diagnostic accuracy of myocardial perfusion imaging over non-AC SPECT, differentiating between scar and attenuation artifacts. We have previously shown that attenuation artifacts produce an overestimation of the size of inferior infarcts in the male population...
April 2018: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/29340989/gated-spect-myocardial-perfusion-imaging-with-cadmium-zinc-telluride-detectors-allows-real-time-assessment-of-dobutamine-stress-induced-wall-motion-abnormalities
#13
Rene Nkoulou, Mathias Wolfrum, Aju P Pazhenkottil, Michael Fiechter, Ronny R Buechel, Oliver Gaemperli, Philipp A Kaufmann
BACKGROUND: Left ventricular (LV) ejection fraction (EF) during high dobutamine stress (HD) by real-time gated-SPECT myocardial perfusion imaging (MPI) on a cadmium-zinc-telluride (CZT) gamma camera was validated versus cardiac magnetic resonance imaging (CMR). METHODS AND RESULTS: After injecting 99mTc-tetrofosmin (320 MBq) in 50 patients (mean age 64 +/- 11 years), EF at rest and post-stress as well as relevant changes in EF at HD (ΔEF ≥ 5%) were assessed. CZT and CMR rest EF values yielded an excellent correlation and agreement (r = 0...
January 16, 2018: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29340889/quantification-of-myocardial-perfusion-defect-size-in-rats-comparison-between-quantitative-perfusion-spect-and-autoradiography
#14
Hiroshi Wakabayashi, Junichi Taki, Anri Inaki, Tomo Hiromasa, Koichi Okuda, Takayuki Shibutani, Kazuhiro Shiba, Seigo Kinuya
PURPOSE: Ultra-high resolution single-photon emission computed tomography (SPECT) system, using multiple pinhole collimators, has been applied to the imaging of small rodents. We aimed to compare the myocardial infarction (MI) area on quantitative perfusion single-photon emission computed tomography (QPS; Cedars-Sinai Medical Center, USA) with that on high-resolution autoradiography in rat model to determine the accuracy of perfusion defect measurement by QPS. PROCEDURES: After thoracotomy, rats (n = 9) had their left coronary arteries occluded and reperfused before injection with 185 MBq [99mTc] methoxyisobutylisonitrile ([99mTc]MIBI) for SPECT and autoradiography...
January 16, 2018: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/29320864/diagnostic-performance-of-static-single-scan-stress-perfusion-cardiac-computed-tomography-in-detecting-hemodynamically-significant-coronary-artery-stenosis-a-comparison-with-combined-invasive-coronary-angiography-and-cardiovascular-magnetic-resonance-myocardial
#15
Inyoung Song, Jeong Geun Yi, Jeong Hee Park, Mi Young Kim, Je Kyoun Shin, Sung Min Ko
Background Non-invasive anatomical and physiological evaluations of coronary artery disease (CAD) may be obtained with static single-scan stress perfusion cardiac computed tomography (SSPCT). Purpose To determine the diagnostic performance of static SSPCT for identifying hemodynamically significant CAD. Material and Methods This prospective study included 29 patients with suspected or known CAD who underwent static SSPCT, cardiovascular magnetic resonance myocardial perfusion imaging (CMR-MPI), and invasive coronary angiography (ICA)...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29315054/ambulatory-management-of-pulmonary-embolism
#16
Houssam Abusibah, Muntasir M Abdelaziz, Peter Standen, Praveen Bhatia, Mahir Ma Hamad
The diagnosis of pulmonary embolism can be very difficult and elusive. It depends greatly on the use of diagnostic tests, which are in turn interpreted according to a pre-test clinical probability. These include non-specific tests such as the chest X-ray and electrocardiograph, which help exclude other conditions such as pneumonia or myocardial infarction. On the other hand, more specific tests such as computed tomography or ventilation/perfusion scanning are used to confirm or exclude the diagnosis of pulmonary embolism...
January 2, 2018: British Journal of Hospital Medicine
https://www.readbyqxmd.com/read/29298216/the-utility-of-myocardial-perfusion-imaging-before-renal-transplantation-a-retrospective-analysis
#17
Paul D Callan, Sunil Bhandari, Andrew L Clark, David Eadington, Emmanouil Papadopoulos, Ann C Tweddel
BACKGROUND: Renal transplantation (RT) reduces morbidity and mortality in patients with end-stage renal failure. Myocardial perfusion imaging provides prognostic information in patients with renal failure, but its role before transplantation remains unclear. We performed a retrospective review assessing the prognostic value of technetium-99m sestamibi myocardial perfusion imaging at a tertiary UK centre. PATIENTS AND METHODS: We included scans performed between 2005 and 2012...
March 2018: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/29296058/myocardial-perfusion-abnormalities-in-asymptomatic-type-2-diabetic-patients
#18
Ghada Al-Humaidi, Ismet Sarikaya, Abdelhamid H Elgazzar, Azu Owunwanne
Objective: The prevalence of coronary artery disease (CAD) is high in patients with diabetes. Because ischemia and infarction are often silent in diabetic patients, diagnosis of CAD occurs inevitably late. It is essential to identify the presence of CAD in diabetic patients to start early treatment. Therefore, the aim of this study was to determine the prevalence of abnormal myocardial perfusion in asymptomatic type 2 diabetic patients using myocardial perfusion imaging. Methods: Fifty-nine patients with type 2 diabetes, who did not have any history of CAD, but did have risk factors underwent myocardial perfusion single-photon emission computed tomography (SPECT) imaging using99m Tc-tetrofosmin and a 2-day stress-rest protocol...
January 2018: Journal of the Saudi Heart Association
https://www.readbyqxmd.com/read/29285726/myocardial-perfusion-in-patients-with-non-ischaemic-systolic-heart-failure-and-type-2-diabetes-a-cross-sectional-study-using-rubidium-82-pet-ct
#19
Christina Byrne, Philip Hasbak, Andreas Kjaer, Jens Jakob Thune, Lars Køber
Both patients with non-ischaemic systolic heart failure and patients with type 2 diabetes (T2DM) often have reduced myocardial blood flow without significant coronary atherosclerosis. However, the mechanisms are not fully understood. The aim of this study was to investigate whether perfusion is reduced additionally when the 2 are combined. In a cross-sectional study, we scanned patients with non-ischaemic systolic heart failure with and without T2DM using Rubidium-82 positron emission tomography/computed tomography at rest and adenosine-induced stress, thereby obtaining the myocardial flow reserve (myocardial flow reserve (MFR) = stress flow/rest flow) as a measure of the myocardial vasomotor function; 28 patients with T2DM and 123 without T2DM were included...
December 28, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29273695/cardiac-displacement-during-13-n-ammonia-myocardial-perfusion-pet-ct-comparison-between-adenosine-and-regadenoson-induced-stress
#20
Elise Vleeming, Sergiy Lazarenko, Friso van der Zant, Xiao-Bo Pan, Jerome Declerck, Maurits Wondergem, Remco Knol
PURPOSE: In this study, differences are investigated in cardiac displacement during adenosine stress versus regadenoson stress in13 N-Ammonia(13 NH3 ) MP PET/CT scans. METHODS: A total of 61 MP PET/CTs were acquired using either adenosine (n=30) or regadenoson (n=31) as a stressor. For both groups, cardiac displacement during rest and stress was measured three-dimensionally, relative to either a fixed reference frame or the previous frame, in each 1-minute frame of a list-mode PET acquisition of 25 minutes...
December 22, 2017: Journal of Nuclear Medicine Technology
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