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Ko CL, Lin SS, Huang CW, Chang YH, Ko KY, Cheng MF, Wang SY, Chen CM, Wu YW. Polar map-free 3D deep learning algorithm to predict obstructive coronary artery disease with myocardial perfusion CZT-SPECT. Eur J Nucl Med Mol Imaging 2023; 50:376-386. [PMID: 36102963 DOI: 10.1007/s00259-022-05953-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 08/23/2022] [Indexed: 01/10/2023]
Abstract
PURPOSE Deep learning (DL) models have been shown to outperform total perfusion deficit (TPD) quantification in predicting obstructive coronary artery disease (CAD) from myocardial perfusion imaging (MPI). However, previously published methods have depended on polar maps, required manual correction, and normal database. In this study, we propose a polar map-free 3D DL algorithm to predict obstructive disease. METHODS We included 1861 subjects who underwent MPI using cadmium-zinc-telluride camera and subsequent coronary angiography. The subjects were divided into parameterization and external validation groups. We implemented a fully automatic algorithm to segment myocardium, perform registration, and apply normalization. We further flattened the image based on spherical coordinate system transformation. The proposed model consisted of a component to predict patent arteries and a component to predict disease in each vessel. The model was cross-validated in the parameterization group, and then further tested using the external validation group. The performance was assessed by area under receiver operating characteristic curves (AUCs) and compared with TPD. RESULTS Our algorithm preprocessed all images accurately as confirmed by visual inspection. In patient-based analysis, the AUC of the proposed model was significantly higher than that for stress-TPD (0.84 vs 0.76, p < 0.01). In vessel-based analysis, the proposed model also outperformed regional stress-TPD (AUC = 0.80 vs 0.72, p < 0.01). The addition of quantitative images did not improve the performance. CONCLUSIONS Our proposed polar map-free 3D DL algorithm to predict obstructive CAD from MPI outperformed TPD and did not require manual correction or a normal database.
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Affiliation(s)
- Chi-Lun Ko
- Department of Biomedical Engineering, National Taiwan University, Taipei, Taiwan
- Department of Nuclear Medicine, National Taiwan University Hospital, Taipei, Taiwan
- College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Shau-Syuan Lin
- Department of Biomedical Engineering, National Taiwan University, Taipei, Taiwan
| | - Cheng-Wen Huang
- Department of Biomedical Engineering, National Taiwan University, Taipei, Taiwan
| | - Yu-Hui Chang
- Department of Biomedical Engineering, National Taiwan University, Taipei, Taiwan
| | - Kuan-Yin Ko
- Department of Nuclear Medicine, National Taiwan University Cancer Center, Taipei, Taiwan
| | - Mei-Fang Cheng
- Department of Nuclear Medicine, National Taiwan University Hospital, Taipei, Taiwan
- College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Shan-Ying Wang
- Department of Nuclear Medicine, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Chung-Ming Chen
- Department of Biomedical Engineering, National Taiwan University, Taipei, Taiwan
| | - Yen-Wen Wu
- Department of Nuclear Medicine, National Taiwan University Hospital, Taipei, Taiwan.
- College of Medicine, National Taiwan University, Taipei, Taiwan.
- Department of Nuclear Medicine, Far Eastern Memorial Hospital, New Taipei City, Taiwan.
- Division of Cardiology, Cardiovascular Medical Center, Far Eastern Memorial Hospital, No. 21, Sec. 2, Nanya S. Rd., Banciao Dist., New Taipei City, 220, Taiwan.
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan.
- Graduate Institute of Medicine, Yuan Ze University, Taoyuan, Taiwan.
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Cantoni V, Green R, Acampa W, Zampella E, Assante R, Nappi C, Gaudieri V, Mannarino T, Cuocolo R, Di Vaia E, Petretta M, Cuocolo A. Diagnostic performance of myocardial perfusion imaging with conventional and CZT single-photon emission computed tomography in detecting coronary artery disease: A meta-analysis. J Nucl Cardiol 2021; 28:698-715. [PMID: 31089962 DOI: 10.1007/s12350-019-01747-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 04/23/2019] [Indexed: 12/21/2022]
Abstract
BACKGROUND We performed a meta-analysis to compare the diagnostic performance of conventional SPECT (C-SPECT) and cadmium-zinc-telluride (CZT)-SPECT systems in detecting angiographically proven coronary artery disease (CAD). METHODS Studies published between January 2000 and February 2018 were identified by database search. We included studies assessing C-SPECT or CZT-SPECT as a diagnostic test to evaluate patients for the presence of CAD, defined as at least 50% diameter stenosis on invasive coronary angiography. A study was eligible regardless of whether patients were referred for suspected or known CAD. RESULTS We identified 40 eligible articles (25 C-SPECT and 15 CZT-SPECT studies) including 7334 patients (4997 in C-SPECT and 2337 in CZT-SPECT studies). The pooled sensitivity and specificity were 85% and 66% for C-SPECT and 89% and 69% for CZT-SPECT imaging studies. The area under the curve was slightly higher for CZT-SPECT (0.89) compared to C-SPECT (0.83); accordingly, the summary diagnostic OR was 17 for CZT-SPECT and 11 for C-SPECT. The accuracy of the two tests slightly differs between C-SPECT and CZT-SPECT (chi-square 11.28, P < .05). At meta-regression analysis, no significant association between both sensitivity and specificity and demographical and clinical variables considered was found for C-SPECT and CZT-SPECT studies. CONCLUSIONS C-SPECT and CZT-SPECT have good diagnostic performance in detecting angiographic proven CAD, with a slightly higher accuracy for CZT-SPECT. This result supports the use of the novel gamma cameras in clinical routine practices also considering the improvements in acquisition time and radiation exposure reduction.
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Affiliation(s)
- Valeria Cantoni
- Department of Advanced Biomedical Sciences, University Federico II, Via Pansini 5, 80131, Naples, Italy
| | - Roberta Green
- Department of Advanced Biomedical Sciences, University Federico II, Via Pansini 5, 80131, Naples, Italy
| | - Wanda Acampa
- Department of Advanced Biomedical Sciences, University Federico II, Via Pansini 5, 80131, Naples, Italy
- Institute of Biostructure and Bioimaging, National Council of Research, Naples, Italy
| | - Emilia Zampella
- Department of Advanced Biomedical Sciences, University Federico II, Via Pansini 5, 80131, Naples, Italy
| | - Roberta Assante
- Department of Advanced Biomedical Sciences, University Federico II, Via Pansini 5, 80131, Naples, Italy
| | - Carmela Nappi
- Department of Advanced Biomedical Sciences, University Federico II, Via Pansini 5, 80131, Naples, Italy
| | - Valeria Gaudieri
- Department of Advanced Biomedical Sciences, University Federico II, Via Pansini 5, 80131, Naples, Italy
| | - Teresa Mannarino
- Department of Advanced Biomedical Sciences, University Federico II, Via Pansini 5, 80131, Naples, Italy
| | - Renato Cuocolo
- Department of Advanced Biomedical Sciences, University Federico II, Via Pansini 5, 80131, Naples, Italy
| | - Eugenio Di Vaia
- Department of Advanced Biomedical Sciences, University Federico II, Via Pansini 5, 80131, Naples, Italy
| | - Mario Petretta
- Department of Translational Medical Sciences, University Federico II, Naples, Italy
| | - Alberto Cuocolo
- Department of Advanced Biomedical Sciences, University Federico II, Via Pansini 5, 80131, Naples, Italy.
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Bian J, Herzog CA, Rangaswami J, Wald R, Stratman JA, Asif A, Sidhu MS, Bangalore S, Mathew RO. Lung Sestamibi Uptake on Myocardial Perfusion Imaging and Outcomes in Chronic Kidney Disease. Cardiorenal Med 2021; 11:67-76. [PMID: 33494087 DOI: 10.1159/000511801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 09/19/2020] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND AND OBJECTIVES In patients with CKD and end-stage kidney disease (ESKD), cardiac stress testing has low sensitivity and specificity for coronary disease. Alternate markers that are derived during the stress testing may enhance the predictive characteristic of stress testing. The objective was to examine the predictive characteristic of lung-to-heart ratio (LHR) in patients with CKD and ESKD. DESIGN, SETTING, PARTICIPANTS, AND MEASUREMENTS Retrospective parallel cohort of ESKD and CKD not on dialysis (CKD-ND) who underwent stress testing with nuclear myocardial perfusion imaging utilizing sestamibi tracer and regadenoson. Stress LHR was calculated by the processing software and reported. Patients were analyzed by tertile of LHR (≤0.28, 0.29-0.32, ≥0.33). The primary outcome was a composite of all-cause mortality, hospitalization for myocardial infarction or unstable angina, or revascularization. RESULTS There were 144 CKD-ND and 145 ESKD patients. Patients with ESKD had greater comorbidity burden than CKD-ND. Stress tests were more often performed for pre-operative risk assessment among ESKD versus CKD-ND (53.8 vs. 5.6%, p < 0.001). ESKD patients more likely had ischemia identified on stress testing (19.3 vs. 8.3%, p = 0.001). Mean LHR was 0.31 (Standard deviation - SD: 0.09) and was similar across CKD-ND stages and ESKD. Primary outcome in the lowest (23%) and highest (33.3%) LHR tertile was higher than the middle tertile (12.8%); p = 0.005. This finding was similar between CKD-ND and ESKD and persisted in multivariable analysis. CONCLUSIONS LHR ≤0.28 and ≥0.33 are independently associated with higher risk for death in patients with CKD-ND and ESKD. Future studies are warranted to understand the association of extreme LHR values and outcomes in this high-risk population.
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Affiliation(s)
- Julia Bian
- University of South Carolina School of Medicine, Columbia, South Carolina, USA
| | - Charles A Herzog
- Cardiology Division, Department of Internal Medicine, Hennepin Healthcare/University of Minnesota, Minneapolis, Minnesota, USA
| | - Janani Rangaswami
- Division of Nephrology, Department of Medicine, Einstein Medical Center, Philadelphia, Pennsylvania, USA
| | - Ron Wald
- Division of Nephrology and Li Ka Shing Knowledge Institute, St. Michael's Hospital, University of Toronto, Ontario, Québec, Canada
| | - Jennifer A Stratman
- Education & Research, Columbia VA Health Care System, Columbia, South Carolina, USA
| | - Arif Asif
- Department of Medicine, Jersey Shore University Medical Center, Hackensack-Meridian School of Medicine at Seton Hall University, Hackensack-Meridian Health, Neptune, New Jersey, USA
| | - Mandeep S Sidhu
- Division of Cardiology, Department of Medicine, Albany Medical College & Albany Medical Center, Albany, New York, USA
| | - Sripal Bangalore
- Division of Cardiology, Department of Medicine, NYU Grossman School of Medicine, New York, New York, USA
| | - Roy O Mathew
- University of South Carolina School of Medicine, Columbia, South Carolina, USA, .,Division of Nephrology, Department of Medicine, Columbia VA Health Care System, Columbia, South Carolina, USA,
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Huang JY, Yen RF, Lee WC, Huang CK, Hsu PY, Cheng MF, Lu CC, Lin YH, Chien KL, Wu YW. Improved diagnostic accuracy of thallium-201 myocardial perfusion single-photon emission computed tomography with CT attenuation correction. J Nucl Cardiol 2019; 26:1584-1595. [PMID: 29484543 DOI: 10.1007/s12350-018-1230-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Accepted: 01/18/2018] [Indexed: 10/17/2022]
Abstract
BACKGROUND The benefits of attenuation correction (AC) in technetium-99m myocardial perfusion imaging (MPI) have been well established. However, the value of thallium (Tl-201) AC and routine computed tomography AC (CTAC) were less well established. The aims of this study were to evaluate the diagnostic performance of thallium (Tl-201) MPI with additional CTAC and to determine which participants would benefit most. METHODS AND RESULTS A total of 108 consecutive patients who underwent Tl-201 MPI and received coronary angiography within 3 months were enrolled. Diagnostic performance was determined by sensitivity, specificity, and receiver operating characteristic curve analysis. Subgroup analyses were performed using gender and obesity. CTAC improved the area under the curve (0.84 vs. 0.77, P = 0.037 at patient level), primarily due to a significant improvement in specificity (0.78 vs. 0.57, P = 0.013) and no significant difference in sensitivity (0.79 vs. 0.82, P = 0.75). In subgroup analysis, CTAC was most helpful in obese subjects, men, and especially right coronary artery lesions. CONCLUSIONS CTAC significantly improved diagnostic performance primarily by increasing the specificity, and the improvements were significantly greater in obese patients and male patients. These findings suggest that CTAC should be applied to Tl-201 MPI as routine clinical practice.
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Affiliation(s)
- Jei-Yie Huang
- Department of Nuclear Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, No. 7, Chung Shan S. Rd, Taipei City, 10002, Taiwan
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Room 501, No. 17, Xu-Zhou Road, Taipei City, 100, Taiwan
| | - Ruoh-Fang Yen
- Department of Nuclear Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, No. 7, Chung Shan S. Rd, Taipei City, 10002, Taiwan
| | - Wen-Chung Lee
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Room 501, No. 17, Xu-Zhou Road, Taipei City, 100, Taiwan
| | - Chun-Kai Huang
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Room 501, No. 17, Xu-Zhou Road, Taipei City, 100, Taiwan
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, No. 7, Chung Shan S. Rd, Taipei City, 10002, Taiwan
| | - Pei-Ying Hsu
- Department of Nuclear Medicine, National Taiwan University Hospital, Yun-Lin Branch, No.579, Sec. 2, Yunlin Rd., Douliu City, 640, Yun-Lin County, Taiwan
| | - Mei-Fang Cheng
- Department of Nuclear Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, No. 7, Chung Shan S. Rd, Taipei City, 10002, Taiwan
| | - Ching-Chu Lu
- Department of Nuclear Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, No. 7, Chung Shan S. Rd, Taipei City, 10002, Taiwan
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Room 501, No. 17, Xu-Zhou Road, Taipei City, 100, Taiwan
| | - Yen-Hung Lin
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, No. 7, Chung Shan S. Rd, Taipei City, 10002, Taiwan
| | - Kuo-Liong Chien
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Room 501, No. 17, Xu-Zhou Road, Taipei City, 100, Taiwan
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, No. 7, Chung Shan S. Rd, Taipei City, 10002, Taiwan
| | - Yen-Wen Wu
- Department of Nuclear Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, No. 7, Chung Shan S. Rd, Taipei City, 10002, Taiwan.
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, No. 7, Chung Shan S. Rd, Taipei City, 10002, Taiwan.
- Department of Nuclear Medicine, Far Eastern Memorial Hospital, No. 21, Sec. 2, Nanya S. Rd, Banciao Dist., New Taipei City, 220, Taiwan.
- Cardiology Division of Cardiovascular Medical Center, Far Eastern Memorial Hospital, No. 21, Sec. 2, Nanya S. Rd., Banciao Dist., New Taipei City, 220, Taiwan.
- National Yang-Ming University School of Medicine, No.155, Sec.2, Linong Street, Taipei City, 112, Taiwan.
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Zhang YQ, Jiang YF, Hong L, Chen M, Zhang NN, Yang HJ, Zhou YF. Diagnostic value of cadmium-zinc-telluride myocardial perfusion imaging versus coronary angiography in coronary artery disease: A PRISMA-compliant meta-analysis. Medicine (Baltimore) 2019; 98:e14716. [PMID: 30817614 PMCID: PMC6831125 DOI: 10.1097/md.0000000000014716] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Rapid progress has been made in research of cadmium-zinc-telluride (CZT) technology in the last few years, which might serve as a new method to diagnose coronary artery disease. However, compared with coronary angiography, the diagnostic value of CZT is still controversial. We aimed to evaluate diagnosis value of coronary angiography versus CZT in coronary artery disease. METHODS We searched the database for eligible researches associated with CZT- myocardial perfusion imaging (MPI) and invasive coronary angiography, extracted the relevant data, and rigorously screened it according to the inclusion and exclusion criteria. The accuracy indicators included sensitivity, specificity, accuracy, positive and negative likelihood ratios. RESULTS According to the inclusion and exclusion criteria, we finally found 20 studies containing 2350 patients in this search. Pooled results showed that sensitivity of CZT-MPI was 0.84% and 95% confidence interval (95% CI): 0.78 to 0.89, specificity was 0.72, 95% CI (0.62-0.76), the specificity was lower apparently. The positive likelihood ratio was 3.0, 95% CI (2.4-3.8), the negative likelihood ratio was 0.22, 95% CI (0.16-0.31), diagnostic odds ratio was 14, 95% CI (7.84-17.42). CONCLUSION This meta-analysis showed that CZT-MPI had satisfactory sensitivity and specificity for diagnosing coronary artery disease. Larger studies are required for further evaluation.
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Nudi F, Iskandrian AE, Schillaci O, Peruzzi M, Frati G, Biondi-Zoccai G. Diagnostic Accuracy of Myocardial Perfusion Imaging With CZT Technology: Systemic Review and Meta-Analysis of Comparison With Invasive Coronary Angiography. JACC Cardiovasc Imaging 2017; 10:787-794. [PMID: 28330657 DOI: 10.1016/j.jcmg.2016.10.023] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 09/29/2016] [Accepted: 10/05/2016] [Indexed: 02/08/2023]
Abstract
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. METHODS Clinical studies comparing CZT-MPI and invasive coronary angiography were systematically searched and abstracted. Calculations of diagnostic accuracy, including sensitivity, specificity, likelihood ratios, and diagnostic odds ratio, were obtained with fixed and random effects, reporting point estimates and 95% confidence intervals. RESULTS Based on our search, a total of 16 studies (N = 2,092) were included. The sensitivity of CZT-MPI was 0.84 (95% confidence interval [CI]: 0.78 to 0.89), whereas the specificity of 0.69 (95% CI: 0.62 to 0.76) was significantly reduced. The positive likelihood ratio was 2.73 (95% CI: 2.21 to 3.39), the negative likelihood ratio was 0.24 (95% CI: 0.17 to 0.31), and the diagnostic odds ratio was 11.93 (95% CI: 7.84 to 17.42). At subgroup and meta-regression analyses, the diagnostic accuracy between D-SPECT and Discovery cameras was similar (p = 0.711) and not impacted upon by smaller sample size studies (p = 0.573). CONCLUSIONS CZT-MPI has satisfactory sensitivity for angiographically significant CAD, but its suboptimal specificity warrants further development and research.
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Affiliation(s)
- Francesco Nudi
- Service of Hybrid Cardio Imaging, Madonna della Fiducia Clinic, Rome, Italy; Ostia Radiologica, Ostia, Italy; Etisan, Rome, Italy
| | - Ami E Iskandrian
- Division of Cardiovascular Disease, University of Alabama at Birmingham, Alabama
| | - Orazio Schillaci
- Department of Nuclear Medicine, Tor Vergata University, Rome, Italy
| | - Mariangela Peruzzi
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Latina, Italy
| | - Giacomo Frati
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Latina, Italy; Department of AngioCardioNeurology, IRCCS Neuromed, Pozzilli, Italy
| | - Giuseppe Biondi-Zoccai
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Latina, Italy; Department of AngioCardioNeurology, IRCCS Neuromed, Pozzilli, Italy.
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Diagnostic and Prognostic Implications of Exercise Treadmill and Rest First-Pass Radionuclide Angiography in Patients With Pulmonary Hypertension. Clin Nucl Med 2017; 42:e392-e399. [PMID: 28590298 DOI: 10.1097/rlu.0000000000001720] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE Pulmonary hypertension (PH) is characterized by abnormally increased pulmonary vascular pressure, leading to deteriorated right ventricular function and premature death. Pulmonary mean transit time (PMTT) and biventricular function response to exercise in first-pass radionuclide angiography (FP-RNA) may provide early detection and timely disease monitoring of PH. This study aimed to investigate the diagnostic and prognostic values of this imaging modality in PH patients. METHODS Left and right ventricular ejection fraction (LVEF/RVEF) and PMTT at rest and immediately after exercise treadmill test were measured by FP-RNA in 77 consecutive patients with clinical presentations suggestive of PH (aged 46 ± 15 years, 33 men), mostly with symptoms of unexplained progressive dyspnea. These parameters, along with other clinical variables, were correlated with right-sided heart catheterization data and clinical outcomes. RESULTS Fifty patients (64.9%) were diagnosed as having definite PH. Besides higher N-terminal pro-B-type natriuretic peptide levels, right atrial pressure, and pulmonary vascular resistance, PH patients had significantly longer PMTT, lower LVEF after exercise and rest, and lower poststress RVEF (all P < 0.05), compared with non-PH subjects. Moreover, PH patients exhibited stress-induced right ventricular dysfunction and stationary poststress PMTT. Poststress PMTT and echocardiography had comparable diagnostic utility (area under the curve, 0.80 vs 0.84, respectively). Eighteen patients died during a median follow-up period of 380 days. Failure of exercise treadmill test, lower peak heart rate response, and stress/rest LVEF ratio of less than 90% using exercise treadmill FP-RNA were independent predictors of mortality in PH patients. CONCLUSIONS Exercise treadmill and rest FP-RNA provided diagnostic value and had prognostic implications in patients with PH.
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Clinical significance of right ventricular activity on treadmill thallium-201 myocardial single-photon emission computerized tomography using cadmium-zinc-telluride cameras. Nucl Med Commun 2017; 37:650-7. [PMID: 27110956 DOI: 10.1097/mnm.0000000000000494] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Identification of right ventricular (RV) abnormalities is important in patients with suspected coronary artery disease (CAD). RV activity can be better visualized on myocardial single-photon emission computerized tomography (SPECT) using a higher sensitivity cadmium-zinc-telluride (CZT) detector. The aim of this study was to investigate the clinical significance of RV/left ventricular (LV) uptake ratios during exercise thallium-201 SPECT using CZT detectors. PATIENTS AND METHODS A total of 102 patients underwent treadmill ECG-gated SPECT, coronary angiography, and echocardiography. SPECT myocardial perfusion was interpreted using a 17-segment model and a 0-4-point scale. RV/LV uptake ratios were calculated on the basis of maximum counts per pixel within the entire RV and LV walls. The relationships between RV/LV uptake ratio and gated SPECT, presence of CAD (≥50% stenosis in the left main or ≥70% in the main branches), demographics, and echocardiographic parameters were analyzed. RESULTS Stress RV/LV ratios correlated positively with the presence of left main or multivessel disease, and tricuspid regurgitation maximum pressure gradient. After multivariate regression, stress/rest RV/LV ratios correlated positively with mitral flow deceleration time, age, female sex, and use of β-blockers. CONCLUSION RV/LV uptake ratios on the basis of exercise myocardial perfusion SPECT imaging using CZT cameras are useful for the detection of severe CAD and could serve as an indicator of pulmonary hypertension and LV diastolic dysfunction.
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Angelidis G, Giamouzis G, Karagiannis G, Butler J, Tsougos I, Valotassiou V, Giannakoulas G, Dimakopoulos N, Xanthopoulos A, Skoularigis J, Triposkiadis F, Georgoulias P. SPECT and PET in ischemic heart failure. Heart Fail Rev 2017; 22:243-261. [DOI: 10.1007/s10741-017-9594-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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