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https://www.readbyqxmd.com/read/28622946/estimation-of-myocardial-flow-reserve-utilizing-an-ultrafast-cardiac-spect-comparison-with-coronary-angiography-fractional-flow-reserve-and-the-syntax-score
#1
Masao Miyagawa, Yoshiko Nishiyama, Teruyoshi Uetani, Akiyoshi Ogimoto, Shuntaro Ikeda, Hayato Ishimura, Emiri Watanabe, Rami Tashiro, Yuki Tanabe, Teruhito Kido, Akira Kurata, Teruhito Mochizuki
BACKGROUND: Quantitative assessment of myocardial flow reserve (MFR) by single photon emission computed tomography (SPECT) myocardial perfusion imaging (MPI) is challenging but may facilitate evaluation of multi-vessel coronary artery disease (CAD). METHODS: We enrolled 153 patients with suspected or known CAD, referred for pharmacological stress MPI. They underwent a (99m)Tc-perfusion stress/rest SPECT with an ultrafast cadmium-zinc-telluride (CZT) camera. Dynamic data were acquired and time-activity curves fitted to a 1-tissue compartment analysis with input function...
June 13, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28622166/quantitative-analysis-of-iodine-image-of-dual-energy-computed-tomography-at-rest-comparison-with-99mtc-tetrofosmin-stress-rest-single-photon-emission-computed-tomography-myocardial-perfusion-imaging-as-the-reference-standard
#2
Takehiro Nakahara, Takuji Toyama, Masahiro Jinzaki, Ryotaro Seki, Yuichiro Saito, Tetsuya Higuchi, Minoru Yamada, Masashi Arai, Yoshito Tsushima, Sachio Kuribayashi, Masahiko Kurabayashi
PURPOSE: Dual-energy computed tomography (DECT) can be used for visual determination of iodine distribution in the myocardium (iodine image); however, the accuracy and reproducibility of the process remains debatable. Because of the low contrast-to-noise ratio of CT, we hypothesized that quantitative measurement may be more accurate for detecting myocardial ischemia. In this study, we evaluated our quantitative method by comparing it with visual analysis using Tc-tetrofosmin (TF) stress-rest single-photon emission computed tomography (SPECT) myocardial perfusion imaging (MPI) as the reference standard...
June 15, 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28611231/validation-of-the-left-ventricular-ejection-fraction-with-iq-spect-system-in-small-heart-patients
#3
Hiroto Yoneyama, Takayuki Shibutani, Takahiro Konishi, Asuka Mizutani, Hashimoto Ryosuke, Masahisa Onoguchi, Koichi Okuda, Shinro Matsuo, Kenichi Nakajima, Kinuya Seigo
The IQ-SPECT system equipped with a multifocal (SMARTZOOM) collimator using an ordered subset conjugate gradient minimization (OSCGM) algorithm reduces the acquisition time of myocardial perfusion imaging (MPI) compared to conventional gamma cameras equipped with low-energy high-resolution (LEHR) collimators. We compared IQ-SPECT with a conventional single-photon emission computed tomography (SPECT) system for estimating the left ventricular ejection fraction (LVEF) in small-heart patients. Methods: The study group consisted of 98 consecutive patients who underwent a 1-day stress-rest MPI study with a (99m)Tc-labeled agent for preoperative risk assessment...
June 13, 2017: Journal of Nuclear Medicine Technology
https://www.readbyqxmd.com/read/28608184/assessment-of-left-ventricular-contraction-patterns-using-gated-spect-mpi-to-predict-cardiac-resynchronization-therapy-response
#4
Ningchao Tao, Yuanhao Qiu, Haipeng Tang, Zhiyong Qian, Hongping Wu, Rui Zhu, Yao Wang, Xiaofeng Hou, Weihua Zhou, Jiangang Zou
BACKGROUND: The U-shaped left ventricular (LV) contraction pattern, identified by MRI or echocardiography, is associated with improved CRT response. Gated SPECT MPI can measure both myocardial viability and mechanical dyssynchrony in a single scan. The aim of this study is to examine the relationship of the LV contraction pattern and the response of CRT in patients with left bundle branch block (LBBB). METHODS: Fifty-eight patients who met CRT guidelines and who had pre-CRT MPI were enrolled...
June 12, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28585034/myocardial-perfusion-imaging-in-women-for-the-evaluation-of-stable-ischemic-heart-disease-state-of-the-evidence-and-clinical-recommendations
#5
Viviany R Taqueti, Sharmila Dorbala, David Wolinsky, Brian Abbott, Gary V Heller, Timothy M Bateman, Jennifer H Mieres, Lawrence M Phillips, Nanette K Wenger, Leslee J Shaw
This document from the American Society of Nuclear Cardiology represents an updated consensus statement on the evidence base of stress myocardial perfusion imaging (MPI), emphasizing new developments in single-photon emission tomography (SPECT) and positron emission tomography (PET) in the clinical evaluation of women presenting with symptoms of stable ischemic heart disease (SIHD). The clinical evaluation of symptomatic women is challenging due to their varying clinical presentation, clinical risk factor burden, high degree of comorbidity, and increased risk of major ischemic heart disease events...
June 5, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28575215/comparison-of-the-effects-of-selective-and-non-selective-his-bundle-pacing-on-cardiac-electrical-and-mechanical-synchrony
#6
Jinlong Zhang, Jianghong Guo, Xiaofeng Hou, Yao Wang, Zhiyong Qian, Kebei Li, Peibing Ge, Jiangang Zou
Aims: This study aimed to assess the acute effect of selective His bundle pacing (S-HBP), non-selective His bundle pacing (NS-HBP), and right ventricular septum pacing (RVSP) on electrical synchrony and left ventricular (LV) mechanical synchrony using electrocardiogram and phase analysis of gated single photon emission computed tomography (SPECT) myocardial perfusion imaging (MPI). Methods and results: Totally 39 patients eligible for pacemaker were enrolled. Thirty-seven patients underwent successful His bundle pacing (HBP) including S-HBP in 23 and NS-HBP in 14 patients, respectively...
May 31, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28540215/myocardial-flow-reserve-mfr-with-positron-emission-tomography-pet-computed-tomography-ct-clinical-impact-in-diagnosis-and-prognosis
#7
REVIEW
Maria Cecilia Ziadi
In recent years, radionuclide myocardial perfusion imaging (MPI) using positron emission tomography/computed tomography (PET/CT) has emerged as a robust tool for the diagnosis, risk stratification and management of patients with known or established coronary artery disease (CAD). Cardiac PET/CT imaging affords key advantages compared to single photon emission computed tomography (SPECT) that encompass: (I) improved diagnostic accuracy; (II) decreased radiation exposure due to the utilization of short-lived radiopharmaceuticals, and importantly; (III) the ability to quantify noninvasively myocardial blood flow (MBF) in absolute terms, that is in ml per minute per gram of tissue...
April 2017: Cardiovascular Diagnosis and Therapy
https://www.readbyqxmd.com/read/28537039/investigation-of-dose-reduction-in-cardiac-perfusion-spect-via-optimization-and-choice-of-the-image-reconstruction-strategy
#8
Albert Juan Ramon, Yongyi Yang, P Hendrik Pretorius, Piotr J Slomka, Karen L Johnson, Michael A King, Miles N Wernick
BACKGROUND: We investigated the extent to which the administered dose (activity) level can be reduced without sacrificing diagnostic accuracy for three reconstruction strategies for SPECT-myocardial perfusion imaging (MPI). METHODS: We optimized the parameters of the three reconstruction strategies for perfusion-defect detection over a range of simulated administered dose levels using a set of hybrid studies (derived from 190 subjects) consisting of clinical SPECT-MPI data modified to contain realistic simulated lesions...
May 23, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28508270/the-impact-of-combined-cardiopulmonary-exercise-testing-and-spect-myocardial-perfusion-imaging-on-downstream-evaluation-and-management
#9
Georgios Christopoulos, John Bois, Thomas G Allison, Martin Rodriguez-Porcel, Panithaya Chareonthaitawee
OBJECTIVE: The diagnostic yield of combined cardiopulmonary exercise testing (CPET) and myocardial perfusion imaging (MPI) in patients referred for stress testing has received limited study. METHODS: We evaluated consecutive patients who underwent combined CPET-MPI at a single tertiary referral center between 2011 and 2015. An abnormal CPET was defined as any of the following: reduced oxygen consumption, cardiac output impairment, or pulmonary impairment. Normal MPI was defined as the absence of resting or stress perfusion defect...
May 15, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28493201/nuclear-cardiology-practice-in-spain
#10
Amelia Jimenez-Heffernan, Santiago Aguade-Bruix, Irene Casans-Tormo
BACKGROUND: In Spain, nuclear cardiology (NC) procedures represent the second most frequently performed studies in nuclear medicine (NM) centers. METHODS: The NC Working Group of the Spanish Society of Nuclear Medicine and Molecular Imaging invited NM departments across the country to answer an online questionnaire regarding 2014 activity. RESULTS: Data on 40,161 patients from 42 centers were collected. The responding public centers served 39% of Spain´s population...
May 10, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28469688/significance-of-abnormal-myocardial-perfusion-scans-in-candidates-for-orthotopic-liver-transplantation
#11
Atefe Esmaili, Saeed Farzanefar, Alireza Emami-Ardakani, Mehrshad Abbasi
Background: The implications of cardiac risk stratification before orthotopic liver transplantation (OLT) are not well established. We studied the usefulness of myocardial perfusion imaging (MPI) in this scenario. Methods: MPI data of 24 patients (9 females), candidates of OLT, were collected. They underwent MPI as part of their preoperative risk assessment. MPIs were interpreted by 2 nuclear physicians, who had access to clinical data, scan, and semi-quantification results (i.e., quantitative perfusion single-photon emission tomography (SPECT) [QPS] and quantitative gated SPECT [QGS])...
January 2017: Journal of Tehran Heart Center
https://www.readbyqxmd.com/read/28462467/the-effect-of-ct-based-attenuation-correction-on-the-automatic-perfusion-score-of-myocardial-perfusion-imaging-using-a-dedicated-cardiac-solid-state-czt-spect-ct
#12
John A Kennedy, Yafim Brodov, Adam L Weinstein, Ora Israel, Alex Frenkel
BACKGROUND: Data regarding cardiac cadmium-zinc-telluride (CZT)-specific augmented databases and their impact on CT-based attenuation correction (AC) perfusion scores in myocardial perfusion imaging (MPI) were obtained on a multiple-pinhole CZT SPECT/CT. METHODS AND RESULTS: Summed stress (SSS) and rest scores (SRS) were measured using automated software in three independent patient groups: group 1 (n = 80) underwent MPI on both CZT and conventional sodium iodide (NaI) devices, group 2 (n = 80) with low coronary artery disease likelihood and normal MPI provided reference CZT databases; and group 3 (n = 152) served to compare AC and non-AC (NAC) scores on CZT...
May 1, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28456317/long-term-prognostic-value-of-appropriate-myocardial-perfusion-imaging
#13
Angela S Koh, Weng Kit Lye, Shaw Yang Chia, Jennifer Salunat-Flores, Ling L Sim, Felix Y J Keng, Ru San Tan, Terrance S J Chua
Appropriate use criteria (AUC) for single-photon emission computed tomography myocardial perfusion images (SPECT-MPIs) were developed to address the growth of cardiac imaging studies. Long-term prognostic value of AUC in SPECT-MPI has not been tested in existing cohorts. We sought to determine the long-term prognostic value of MPI classified as appropriate. AUC was evaluated in a prospectively designed cohort of patients who underwent clinically indicated MPI. MPI studies were classified based on 2009 AUC for SPECT-MPI...
March 29, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28454833/changes-in-cardiovascular-medication-after-coronary-artery-calcium-scanning-and-normal-single-photon-emission-computed-tomography-myocardial-perfusion-imaging-in-symptomatic-patients
#14
Elsemiek M Engbers, Jorik R Timmer, Mohamed Mouden, Siert Knollema, Pieter L Jager, Jan Paul Ottervanger
The impact of coronary artery calcium (CAC) scoring on subsequent changes in cardiovascular medication use in symptomatic patients with normal myocardial perfusion imaging (MPI) findings is not well established. The aim of the current study was to evaluate changes in aspirin and statin use in patients suspected for coronary artery disease after CAC scoring and normal single photon emission computed tomography (SPECT) MPI. METHODS: In the current study, 1,033 stable symptomatic patients without a known history of coronary artery disease with normal SPECT MPI who underwent concomitant CAC scoring were included...
April 2017: American Heart Journal
https://www.readbyqxmd.com/read/28450561/prognostic-value-of-myocardial-perfusion-imaging-with-czt-spect-camera-in-patients-suspected-for-coronary-artery-disease
#15
Elsemiek M Engbers, Jorik R Timmer, Mohamed Mouden, Siert Knollema, Pieter L Jager, Jan Paul Ottervanger
The prognostic value of myocardial perfusion imaging (MPI) with the cadmium zinc telluride (CZT) single photon emission computed tomography (SPECT) camera is not well established. Therefore, the aim of the current study was to evaluate the prognostic value of MPI performed with a CZT SPECT camera in a large cohort of patients suspected for coronary artery disease (CAD). Methods: 4057 consecutive symptomatic stable patients without a history of CAD underwent CZT SPECT MPI. During a median follow-up of 2.4 years (25th-75th percentile:1...
April 27, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28447283/adenosine-stress-myocardial-perfusion-imaging-in-octogenarians-safety-tolerability-and-long-term-prognostic-implications-of-hemodynamic-response-and-spect-related-variables
#16
Athanasios Katsikis, Athanasios Theodorakos, Spyridon Papaioannou, Antonios Kalkinis, Genovefa Kolovou, Konstantinos Konstantinou, Maria Koutelou
BACKGROUND: Evaluation of tolerability, safety, and prognostic implications of adenosine stress myocardial perfusion imaging (MPI) in octogenarians. METHODS: 370 octogenarians (49% known coronary artery disease) were studied. Hemodynamic response, MPI-related data, and rest-left ventricular ejection fraction (LVEF) based on echocardiography were registered per patient, and prospective follow-up was performed to document all-cause death (ACD), cardiac death (CD), myocardial infarction (MI), and late revascularization...
April 26, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28439760/prognostic-study-of-cardiac-events-in-japanese-patients-with-chronic-kidney-disease-using-ecg-gated-myocardial-perfusion-imaging-final-3-year-report-of-the-j-access-3-study
#17
Satoko Nakamura, Yuhei Kawano, Kenichi Nakajima, Hiroki Hase, Nobuhiko Joki, Tsuguru Hatta, Shigeyuki Nishimura, Masao Moroi, Susumu Nakagawa, Tokuo Kasai, Hideo Kusuoka, Yasuchika Takeishi, Mitsuru Momose, Kazuya Takehana, Mamoru Nanasato, Syunichi Yoda, Hidetaka Nishina, Naoya Matsumoto, Tsunehiko Nishimura
BACKGROUND: Myocardial perfusion imaging (MPI) is considered useful for risk stratification among patients with chronic kidney disease (CKD), without renal deterioration by contrast media. METHODS AND RESULTS: The Japanese Assessment of Cardiac Events and Survival Study by Quantitative Gated SPECT (J-ACCESS 3) is a multicenter, prospective cohort study investigating the ability of MPI to predict cardiac events in 529 CKD patients without a definitive coronary artery disease...
April 24, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28406042/attributes-of-nuclear-imaging-centers-impacting-physician-referrals-for-single-photon-emission-computed-tomography-myocardial-perfusion-imaging-tests
#18
Junlong Li, Christy R Houle, James R Spalding, Hongbo Yang, Cheryl Q Xiang, Therese M Kitt, Rita M Kristy, Eric Q Wu
AIM: To evaluate nuclear imaging center attributes that cardiologists and primary care physicians (PCPs) consider when referring patients for single-photon emission computed tomography myocardial perfusion imaging (SPECT-MPI) tests, and how these attributes impact physician referral decisions in the United States. METHODS: A targeted literature review and seven one-to-one interviews with physicians and imaging center directors were conducted to identify attributes that could impact physicians' referral decisions...
April 13, 2017: Journal of Medical Economics
https://www.readbyqxmd.com/read/28405882/iq-spect-for-thallium-201-myocardial-perfusion-imaging-effect-of-normal-databases-on-quantification
#19
Takahiro Konishi, Kenichi Nakajima, Koichi Okuda, Hiroto Yoneyama, Shinro Matsuo, Takayuki Shibutani, Masahisa Onoguchi, Seigo Kinuya
OBJECTIVE: Although IQ-single-photon emission computed tomography (SPECT) provides rapid acquisition and attenuation-corrected images, the unique technology may create characteristic distribution different from the conventional imaging. This study aimed to compare the diagnostic performance of IQ-SPECT using Japanese normal databases (NDBs) with that of the conventional SPECT for thallium-201 ((201)Tl) myocardial perfusion imaging (MPI). METHODS: A total of 36 patients underwent 1-day (201)Tl adenosine stress-rest MPI...
April 12, 2017: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/28400923/significance-of-inferior-wall-ischemia-in-non-dominant-right-coronary-artery-anatomy
#20
Ali Osama Malik, Oliver Abela, Subodh Devabhaktuni, Arhama Aftab Malik, Gayle Allenback, Chowdhury H Ahsan, Sanjay Malhotra, Jimmy Diep
AIM: To investigate the relationship of inferior wall ischemia on myocardial perfusion imaging in patients with non-dominant right coronary artery anatomy. METHODS: This was a retrospective observational analysis of consecutive patients who presented to the emergency department with primary complaint of chest pain. Only patients who underwent single photon emission computed tomography (SPECT) myocardial perfusion imaging (MPI) were included. Patients who showed a reversible defect on SPECT MPI and had coronary angiography during the same hospitalization was analyzed...
March 26, 2017: World Journal of Cardiology
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