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Foula HS, Itakura M, Miwa N, Momohara K, Sakurai H, Onogi T, Okubo K, Foula M, Elrggal M, Magdy M, Tsuboi M, Sato T. Does central venous stenosis affects the brachial artery flow volume and peripheral vascular resistive index in patients on maintenance hemodialysis? A retrospective study. J Vasc Access 2024:11297298231226427. [PMID: 38436100 DOI: 10.1177/11297298231226427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024] Open
Abstract
BACKGROUND A well-functioning vascular access (VA) is crucial for the patients on maintenance hemodialysis (HD). Central venous stenosis (CVS) is a common, yet, overlooked complication of VA as its diagnosis is challenging. Moreover, its effect on the flow volume (FV) and the peripheral resistive index (RI) was not well discussed before. Despite the availability of doppler ultrasound (DUS) in most centers, direct visualization of central veins using DUS is quite difficult. METHODS This is a retrospective single-center self-controlled cohort study that was conducted in a specialized vascular access management tertiary center in Japan and included all patients with CVS who underwent percutaneous transluminal angiography (PTA) with or without vascular stenting in the period from January 2014 to September 2022. The patients were divided according to their VA type into arteriovenous fistula (AVF), and arteriovenous graft (AVG) groups, then subdivided, according to the type of stenosis, into two subgroups: CVS, and mixed central and peripheral venous stenosis (MVS) groups. The FV and RI of the feeding artery were compared in the same procedure before and after PTA to assess the impact of the procedure itself. RESULTS Data of 485 percutaneous transluminal angiography procedures (PTA), performed in 95 patients during the period from January 2014 to September 2022, were collected. FV and RI were significantly affected in the patients with MVS than patients with CVS. After PTA, both FV and RI were significantly improved. The improvement rate of FV and RI after PTA were significantly higher in patients with MVS than patients with CVS. However, it was difficult to determine the cut-off value to diagnose or to assess the improvement of CVS. CONCLUSION Our findings suggest that FV and RI measurement by DUS are good tools, along with the clinical findings for assessment of CVS in certain situations.
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Affiliation(s)
- Hassan Saied Foula
- Nephrology Division, Kidney and Urology Center, Alexandria, Alexandria Governorate, Egypt
- Kaikoukai Vascular Access Treatment Center, Nagoya, Aichi Prefecture, Japan
| | - Masayuki Itakura
- Kaikoukai Vascular Access Treatment Center, Nagoya, Aichi Prefecture, Japan
| | - Naofumi Miwa
- Kaikoukai Vascular Access Treatment Center, Nagoya, Aichi Prefecture, Japan
| | - Keisuke Momohara
- Kaikoukai Vascular Access Treatment Center, Nagoya, Aichi Prefecture, Japan
| | - Hiroshi Sakurai
- Kaikoukai Vascular Access Treatment Center, Nagoya, Aichi Prefecture, Japan
| | - Takeshi Onogi
- Kaikoukai Vascular Access Treatment Center, Nagoya, Aichi Prefecture, Japan
| | - Kentarou Okubo
- Kaikoukai Vascular Access Treatment Center, Nagoya, Aichi Prefecture, Japan
| | - Mohamed Foula
- Surgery Division, Imam Abdulrahman Bin Faisal University, Khobar, Eastern Province, Saudi Arabia
| | - Mohamed Elrggal
- Nephrology Division, Kidney and Urology Center, Alexandria, Alexandria Governorate, Egypt
| | - Mennah Magdy
- Nephrology Division, Kidney and Urology Center, Alexandria, Alexandria Governorate, Egypt
| | - Masato Tsuboi
- Kaikoukai Vascular Access Treatment Center, Nagoya, Aichi Prefecture, Japan
| | - Takashi Sato
- Kaikoukai Vascular Access Treatment Center, Nagoya, Aichi Prefecture, Japan
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Zeng Z, Wu Y, Chen Z, Huang Q, Wang Y, Luo Y. Runoff Estimation of Jiulong River Based on Acoustic Doppler Current Profiler Online Monitoring Data and Its Implication for Pollutant Flux Estimation. Int J Environ Res Public Health 2022; 19:16363. [PMID: 36498434 PMCID: PMC9739290 DOI: 10.3390/ijerph192316363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/21/2022] [Accepted: 11/25/2022] [Indexed: 06/17/2023]
Abstract
The runoff of the Jiulong River (JLR) is a key parameter that affects the estimation of pollutant flux into Xiamen Bay (XMB). The precise runoff estimation of the JLR can be used to determine the accuracy of the pollutant flux estimation flowing into XMB. In this study, to analyze the hydrological dynamic characteristics and identify the correlation between fixed-site real-time ocean current observations and cross-sectional navigation flow observations, we conducted six navigation observations on two cross-sections of the JLR estuary during the spring tide and neap tide in the normal season, wet season, and dry season in 2020. Simultaneously, we measured hydrological observation data by a fixed-site buoy located in the JLR estuary and collected runoff data that were measured upstream of the JLR. The results showed that the average correlation coefficient between the average velocity of the fixed-point buoy and average velocity of the section was more than 0.90, higher than expected, the minimum average deviation was 4%, and the minimum sample standard error was 5.7%, which was a good result. In this study, we constructed a model for estimating the runoff of the JLR into the sea. The findings demonstrated that Acoustic Doppler Current Profiler (ADCP) online monitoring data were useful to estimate runoff of the JLR with high accuracy, could promote the accuracy of estimated pollutant flux of the JLR's discharge into XMB, and could provide more scientific and reliable basic data for future load flux estimation research.
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Affiliation(s)
- Zhi Zeng
- Third Institute of Oceanography, Ministry of Nature Resources, Xiamen 361005, China
| | - Yufang Wu
- Xiamen Environmental Monitoring Station, Xiamen 361021, China
| | - Zhijie Chen
- Third Institute of Oceanography, Ministry of Nature Resources, Xiamen 361005, China
| | - Quanjia Huang
- Xiamen Environmental Monitoring Station, Xiamen 361021, China
| | - Yinghui Wang
- Third Institute of Oceanography, Ministry of Nature Resources, Xiamen 361005, China
| | - Yang Luo
- Third Institute of Oceanography, Ministry of Nature Resources, Xiamen 361005, China
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
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Park HS, Kim WJ, Choi J, Kim HW, Baik JH, Kim YO, Park CW, Yang CW, Jin DC. The effect of vascular access type on intra-access flow volume during hemodialysis. J Vasc Access 2019; 20:746-751. [PMID: 31148508 DOI: 10.1177/1129729819850942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
INTRODUCTION Previous studies have revealed that vascular access resistance is constant during hemodialysis, but differs according to vascular access type. It is possible that intra-access flow volume (Qac) variation during hemodialysis may also differ according to vascular access type. We conducted this study to investigate whether there are differences in Qac according to vascular access type during hemodialysis. METHODS A total of 58 lower-arm arteriovenous fistula, 14 lower-arm arteriovenous graft, 27 upper-arm arteriovenous fistula, and 45 upper-arm arteriovenous graft cases were studied. Three consecutive Qac values (at 30, 120, and 240 min after the start of hemodialysis) were measured in each patient by the ultrasound dilution technique. Variations in Qac over time were analyzed using repeated measures analysis of variance and multivariate regression analyses, to assess the impact of different factors on Qac variation. RESULTS The repeated measures analysis of variance revealed that a significant interaction exists between time and vascular access type (p < 0.001). This suggests that vascular access type affects Qac change (%) variation over time during hemodialysis. In a multivariate analysis, mean arterial pressure change during hemodialysis (p = 0.009), access type (p < 0.001), and access location (p < 0.001) were independent variables causing Qac change variation. CONCLUSION This study showed that there is a significant difference in Qac variation according to vascular access type during hemodialysis and that arteriovenous graft (vs arteriovenous fistula) and the lower-arm location (vs upper arm) were associated with a decrease in Qac during hemodialysis. This suggests that consideration of vascular access type is required to minimize Qac variation during hemodialysis.
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Affiliation(s)
- Hoon Suk Park
- Division of Nephrology, Department of Internal Medicine, School of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,Department of Internal Medicine, The Catholic University of Korea School of Medicine/St. Vincent's Hospital, Suwon, Republic of Korea
| | - Woo Jeong Kim
- Division of Nephrology, Department of Internal Medicine, School of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,Department of Internal Medicine, The Catholic University of Korea School of Medicine/St. Vincent's Hospital, Suwon, Republic of Korea
| | - Joonsung Choi
- Department of Radiology, St. Vincent's Hospital, School of Medicine, The Catholic University of Korea, Suwon, Republic of Korea
| | - Hyung Wook Kim
- Division of Nephrology, Department of Internal Medicine, School of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,Department of Internal Medicine, The Catholic University of Korea School of Medicine/St. Vincent's Hospital, Suwon, Republic of Korea
| | - Jun Hyun Baik
- Department of Radiology, St. Vincent's Hospital, School of Medicine, The Catholic University of Korea, Suwon, Republic of Korea
| | - Young Ok Kim
- Division of Nephrology, Department of Internal Medicine, School of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Cheol Whee Park
- Division of Nephrology, Department of Internal Medicine, School of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Chul Woo Yang
- Division of Nephrology, Department of Internal Medicine, School of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Dong Chan Jin
- Division of Nephrology, Department of Internal Medicine, School of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,Department of Internal Medicine, The Catholic University of Korea School of Medicine/St. Vincent's Hospital, Suwon, Republic of Korea
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Lee HH, Huang LK, Chang HJ, Wu D, Chi NF, Chan L, Hu CJ, Chen CC. Association Between Net Vertebral Artery Flow Volume and Non-AF Stroke: A Retrospective 2-Year Analysis. Front Neurol 2019; 9:1198. [PMID: 30713522 PMCID: PMC6345680 DOI: 10.3389/fneur.2018.01198] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Accepted: 12/31/2018] [Indexed: 11/29/2022] Open
Abstract
Objectives: Association between net vertebral artery flow volume (NVAFV) and stroke types remains unclear. We hypothesize NVAFV is low in patients with posterior circulation infarction (PCI) and an ideal cut-off value for discriminating PCI from anterior circulation infarction (ACI) and controls may be present. Materials and Methods: As study candidates, we retrospectively enrolled hospitalized patients with first-time non-AF stroke within 2-years period. Consecutive non-AF, non-stroke subjects were enrolled as the control group. We compared NVAFV values among the PCI, ACI, and control groups. Results: Overall, 866 candidates—213, 418, and 235 candidates in the PCI, ACI, and control groups, respectively—were enrolled. NVAFV (mean ± SD) values were 134.8 ± 52.7, 152.3 ± 59.2, and 172.0 ± 54.7 mL/min in the PCI, ACI, and control groups, respectively. Statistics revealed significant difference (p < 0.001) among three groups. To use NVAFV as a diagnostic parameter, the AUC of any two groups should be between 0.58 and 0.69. Most (93.6%) of the controls had NVAFV above 100 mL/min. The odds ratio of any non-AF stroke is 3.48 if the NVAFV is below 100 mL/min. Conclusions: NVAFV is lowest in non-AF PCI group. Low NVAFV is associated with both non-AF ACI and PCI. No ideal cut-off value is available to discriminate PCI from other two conditions. We agree that an NVAFV of 100 mL/min is the lower limit of a normal value. Any value below 100 mL/min indicates high stroke risk and implies diffuse cerebral atherosclerosis and impaired cerebral perfusion.
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Affiliation(s)
- Hsun-Hua Lee
- Department of Neurology, Taipei Medical University-Shuang Ho Hospital, New Taipei City, Taiwan.,Dizziness and Balance Disorder Center, Taipei Medical University-Shuang Ho Hospital, New Taipei City, Taiwan.,Taipei Neuroscience Institute, Taipei Medical University, New Taipei City, Taiwan
| | - Li-Kai Huang
- Department of Neurology, Taipei Medical University-Shuang Ho Hospital, New Taipei City, Taiwan.,Taipei Neuroscience Institute, Taipei Medical University, New Taipei City, Taiwan
| | - Hwai-Jan Chang
- Department of Neurology, Taipei Medical University-Shuang Ho Hospital, New Taipei City, Taiwan.,Taipei Neuroscience Institute, Taipei Medical University, New Taipei City, Taiwan
| | - Dean Wu
- Department of Neurology, Taipei Medical University-Shuang Ho Hospital, New Taipei City, Taiwan.,Taipei Neuroscience Institute, Taipei Medical University, New Taipei City, Taiwan.,Department of Neurology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Nai-Fang Chi
- Department of Neurology, Taipei Medical University-Shuang Ho Hospital, New Taipei City, Taiwan.,Taipei Neuroscience Institute, Taipei Medical University, New Taipei City, Taiwan.,Department of Neurology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Stroke Center, Taipei Medical University-Shuang Ho Hospital, New Taipei City, Taiwan
| | - Lung Chan
- Department of Neurology, Taipei Medical University-Shuang Ho Hospital, New Taipei City, Taiwan.,Taipei Neuroscience Institute, Taipei Medical University, New Taipei City, Taiwan.,Department of Neurology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Stroke Center, Taipei Medical University-Shuang Ho Hospital, New Taipei City, Taiwan
| | - Chaur-Jong Hu
- Department of Neurology, Taipei Medical University-Shuang Ho Hospital, New Taipei City, Taiwan.,Taipei Neuroscience Institute, Taipei Medical University, New Taipei City, Taiwan.,Department of Neurology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Stroke Center, Taipei Medical University-Shuang Ho Hospital, New Taipei City, Taiwan
| | - Chih-Chung Chen
- Department of Neurology, Taipei Medical University-Shuang Ho Hospital, New Taipei City, Taiwan.,Dizziness and Balance Disorder Center, Taipei Medical University-Shuang Ho Hospital, New Taipei City, Taiwan.,Taipei Neuroscience Institute, Taipei Medical University, New Taipei City, Taiwan.,Department of Neurology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
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Lin PJ, Chuang MC, Chang SC. Efficacy of using oxygen microbubble device for facultative anaerobe removal. IET Nanobiotechnol 2018; 12:973-980. [PMID: 30247140 PMCID: PMC8676216 DOI: 10.1049/iet-nbt.2017.0232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 02/17/2018] [Accepted: 05/04/2018] [Indexed: 11/20/2022] Open
Abstract
Patients with serious gingivitis or periodontal diseases suffer from receding gums. Brushing teeth with a toothbrush may result in bleeding gums and new wounds, which increases the difficulty of removing facultative anaerobes from gum pockets, to decrease the damage inflicted on gums, this study proposed a cleaning device that can generate and emit oxygen microbubbles for eliminating facultative anaerobes in the mouth cavity. In this study, the authors conducted simulations with a denture to investigate the efficacy of using this method to remove facultative anaerobes. In this research for the optimal device design, several variables were manipulated including rotation speeds of the bubble generator, different nozzle diameters, and different numbers of nozzle holes. The results revealed that the device is effective in removing facultative anaerobes; moreover, of all design variables, the number of nozzle holes was the factor having the largest effect on anaerobe removal, as it influenced the flow volume and oxygen content of the discharge: the greater the number of nozzles, the greater the flow volume, oxygen content, and efficacy of anaerobe removal.
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Affiliation(s)
- Pei-Ju Lin
- Department of Industrial Design, Institute of Applied Arts, National Chiao Tung University, Hsinchu, Taiwan.
| | - Ming-Chuen Chuang
- Department of Industrial Design, Institute of Applied Arts, National Chiao Tung University, Hsinchu, Taiwan
| | - Szu-Chung Chang
- Division of Periodontology of CM Dental Clinic, Taichung, Taiwan
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Imamura HI, Irisawa A, Shibukawa G, Takagi T, Hikichi T, Obara K, Ohira H. Echo-endoscopic analysis of variceal hemodynamics in patient with isolated gastric varices. Endosc Ultrasound 2015; 3:238-44. [PMID: 25485272 PMCID: PMC4247532 DOI: 10.4103/2303-9027.144542] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Accepted: 04/29/2014] [Indexed: 02/03/2023] Open
Abstract
Background: It is considered that gastric varices (GVs) which have the large form in endoscopic view should be treated because they are regarded as having high blood flow volume and the risky varices of hemorrhage. However, there is no data of the correlation among the endoscopic view, diameter of GV, and blood flow volume in GV. The aim of this study was to investigate whether GV diameter correlates to blood flow volume or not. In addition, the correlation between the endoscopic findings of GVs, patient status, and blood flow volume was assessed. Materials and Methods: In this study, 24 patients were enrolled. Variceal form and its location were observed using flexible GI endoscopes. Assessment of variceal form and location was according to Japanese society of portal hypertension. Then, the GV diameter (the maximum short axis), the GV flow velocity, and the GV flow volume were measured by echo-endoscope with curved linear array or with electronic radial array. Results: Nineteen of 24 enrolled patients were analyzed. There was strong correlation between the GV diameter and the GV flow volume (rs = 0.85, P < 0.01). No significant difference in the GV diameter and the GV flow volume was found between each location. However, there was no significant difference in the GV diameter between each variceal form. In addition, no significant difference was found among Child–Pugh classifications, and in cases associated with or without hepatocelluer carcinoma. Conclusions: Strong correlation was found between GV diameter and flow volume of GV, regardless of the location. However, since there was no significant difference in the GV diameter between each variceal form in endoscopic view, measuring GV diameter is important to understand its hemodynamics for further treatment.
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Affiliation(s)
- HIdemichi Imamura
- Department of Gastroenterology and Rheumatology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Atsushi Irisawa
- Department of Gastroenterology, Fukushima Medical University Aizu Medical Center, Aizuwakamatsu, Japan
| | - Goro Shibukawa
- Department of Gastroenterology, Fukushima Medical University Aizu Medical Center, Aizuwakamatsu, Japan
| | - Tadayuki Takagi
- Department of Gastroenterology and Rheumatology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Takuto Hikichi
- Department of Endoscopy, Fukushima Medical University Hospital, Fukushima, Japan
| | - Katsutoshi Obara
- Department of Endoscopy, Fukushima Medical University Hospital, Fukushima, Japan
| | - Hiromasa Ohira
- Department of Gastroenterology and Rheumatology, Fukushima Medical University School of Medicine, Fukushima, Japan
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Bustamante M, Petersson S, Eriksson J, Alehagen U, Dyverfeldt P, Carlhäll CJ, Ebbers T. Atlas-based analysis of 4D flow CMR: automated vessel segmentation and flow quantification. J Cardiovasc Magn Reson 2015; 17:87. [PMID: 26438074 PMCID: PMC4595325 DOI: 10.1186/s12968-015-0190-5] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 09/10/2015] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND Flow volume quantification in the great thoracic vessels is used in the assessment of several cardiovascular diseases. Clinically, it is often based on semi-automatic segmentation of a vessel throughout the cardiac cycle in 2D cine phase-contrast Cardiovascular Magnetic Resonance (CMR) images. Three-dimensional (3D), time-resolved phase-contrast CMR with three-directional velocity encoding (4D flow CMR) permits assessment of net flow volumes and flow patterns retrospectively at any location in a time-resolved 3D volume. However, analysis of these datasets can be demanding. The aim of this study is to develop and evaluate a fully automatic method for segmentation and analysis of 4D flow CMR data of the great thoracic vessels. METHODS The proposed method utilizes atlas-based segmentation to segment the great thoracic vessels in systole, and registration between different time frames of the cardiac cycle in order to segment these vessels over time. Additionally, net flow volumes are calculated automatically at locations of interest. The method was applied on 4D flow CMR datasets obtained from 11 healthy volunteers and 10 patients with heart failure. Evaluation of the method was performed visually, and by comparison of net flow volumes in the ascending aorta obtained automatically (using the proposed method), and semi-automatically. Further evaluation was done by comparison of net flow volumes obtained automatically at different locations in the aorta, pulmonary artery, and caval veins. RESULTS Visual evaluation of the generated segmentations resulted in good outcomes for all the major vessels in all but one dataset. The comparison between automatically and semi-automatically obtained net flow volumes in the ascending aorta resulted in very high correlation (r (2)=0.926). Moreover, comparison of the net flow volumes obtained automatically in other vessel locations also produced high correlations where expected: pulmonary trunk vs. proximal ascending aorta (r (2)=0.955), pulmonary trunk vs. pulmonary branches (r (2)=0.808), and pulmonary trunk vs. caval veins (r (2)=0.906). CONCLUSIONS The proposed method allows for automatic analysis of 4D flow CMR data, including vessel segmentation, assessment of flow volumes at locations of interest, and 4D flow visualization. This constitutes an important step towards facilitating the clinical utility of 4D flow CMR.
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Affiliation(s)
- Mariana Bustamante
- Division of Cardiovascular Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden.
- Center for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden.
| | - Sven Petersson
- Division of Cardiovascular Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden.
| | - Jonatan Eriksson
- Division of Cardiovascular Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden.
| | - Urban Alehagen
- Division of Cardiovascular Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden.
- Department of Cardiology, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden.
| | - Petter Dyverfeldt
- Division of Cardiovascular Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden.
- Center for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden.
| | - Carl-Johan Carlhäll
- Division of Cardiovascular Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden.
- Center for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden.
- Department of Clinical Physiology, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden.
| | - Tino Ebbers
- Division of Cardiovascular Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden.
- Center for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden.
- Division of Media and Information Technology, Department of Science and Technology/Swedish e-Science Research Center (SeRC), Linköping University, Linköping, Sweden.
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Miyake Y, Hozumi T, Mori I, Sugioka K, Yamamuro A, Akasaka T, Homma S, Yoshida K, Yoshikawa J. Automated quantification of aortic regurgitant volume and regurgitant fraction using the digital colour Doppler velocity profile integration method in patients with aortic regurgitation. Heart 2002; 88:481-4. [PMID: 12381638 PMCID: PMC1767402 DOI: 10.1136/heart.88.5.481] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND The recently introduced automated cardiac flow measurement (ACM) technique provides a quick and an accurate automated calculation of stroke volume and cardiac output. This is obtained by spatio-temporal integration of digital Doppler velocity profile data. OBJECTIVE To evaluate the use of the ACM method in the non-invasive assessment of aortic regurgitant volume and per cent regurgitant fraction (%RF) in patients with aortic regurgitation. METHODS Aortic outflow volume and mitral inflow volume were calculated by the ACM method in 22 patients with isolated aortic regurgitation. Aortic regurgitant volume and %RF were calculated using the following equations: aortic regurgitant volume = [aortic outflow volume] - [mitral inflow volume]; %RF = [aortic regurgitant volume]/[aortic outflow volume] x 100. The results were compared with those obtained using pulsed Doppler cross sectional echocardiography (PD-2D). RESULTS Aortic regurgitant volumes measured by the ACM method showed a good correlation with the PD-2D measurements (r = 0.95, y = 0.9x + 3.9, SEE = 8.6 ml); the mean (SD) difference between the two methods was -1.5 (8.5) ml. %RF estimated by the ACM method also correlated well with the values obtained by the PD-2D method (r = 0.91, y = 0.9x + 4.9, SEE = 6.0%); the mean difference between the two methods was -1.5 (6.0)%. Total time required for aortic regurgitant volume (for one cardiac cycle) by the ACM method was significantly shorter than by the PD-2D method (130 (16) v 230 (32) s, p < 0.01). CONCLUSIONS The newly developed the ACM method is quick and accurate in the automated assessment of aortic regurgitant volume and per cent regurgitant fraction in patients with isolated aortic regurgitation.
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Affiliation(s)
- Y Miyake
- Division of Cardiology, Department of Medicine, Colombia University, New York, USA
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