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3D Micro-CT Scanning Shows Fibers That Control Heart Rhythm

By MedImaging International staff writers
Posted on 10 May 2012
Image: A 3-D image of the heart, showing the fibers that control heart rhythm (Photo courtesy of the University of Liverpool).
Image: A 3-D image of the heart, showing the fibers that control heart rhythm (Photo courtesy of the University of Liverpool).
Scientists have developed a new computed tomography (CT) imaging method to identify tissue fibers in the heart that ensure the muscle beats in a regular rhythm.

The new three-dimensional (3D) images could provide additional clues into how the body’s heartbeat can be disturbed, which may help clinicians develop ways to reduce the risk of fibrillation--a disorder in which heart muscle contracts haphazardly and cannot pump blood rhythmically around the body.

The heart needs to pump blood in a regular rhythm to maintain a steady circulation of blood to all parts of the body. It does this through the coordinated action of the muscle tissue, that pumps the blood, and the conducting tissue, which is necessary to distribute an electrical wave to trigger every heartbeat. Until now scientists have been unable to produce high resolution 3D images of the conducting tissue to fully identify the network that controls heart rhythm.

The team of investigators, from the University of Liverpool (UK), utilized a micro-CT scanner to image hearts that had been treated with iodine to target the different parts of the tissue. They found that the solution was absorbed less appreciably by the conducting regions of the heart compared to the muscular areas of the organ, allowing scientists to distinctly identify the areas that generate electrical activity on the resulting 3D image.

Dr. Jonathan Jarvis, from the University’s Institute of Aging and Chronic Disease, said, “These new anatomically-detailed images could improve the accuracy of future computer models of the heart and help us understand how normal and abnormal heart rhythms are generated. 3D imaging will give us a more thorough knowledge of the cardiac conduction system, and the way it changes in heart disease. Computer models based on these high-fidelity images will help us to understand why the heart rhythm is vulnerable to changes in heart size, blood supply, or scarring after a heart attack. One of the major concerns for surgeons in repairing malformed hearts, for example, is to avoid damage to the tissue that distributes electrical waves. If they had access to 3D images of the conducting tissues in malformed hearts, however, it could be possible to understand where the conducting tissue is likely to be before they operate.”

The study was conducted in collaboration with Alder Hey Children’s Hospital (Liverpool, UK) and the University of Manchester (UK). The research findings were published April 30, 2012, in the journal PLoS ONE.

Related Links:

University of Liverpool
Alder Hey Children’s Hospital
University of Manchester


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92 (92.983245849609): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (34.809112548828): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (45.061111450195): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (30.994415283203): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (28.848648071289): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (30.040740966797): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (54.121017456055): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (35.04753112793): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (30.994415283203): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (31.948089599609): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (!!!!! 3550.0526428223): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (102.99682617188): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (!!!!! 3347.8736877441): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND published='1' LIMIT 1
105 (138.0443572998): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND published='1' LIMIT 1
106 (89.883804321289): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=294740548 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (776.05247497559): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets_archive as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=294740548 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (114.20249938965): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND published='1' LIMIT 1
109 (60.796737670898): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND published='1' LIMIT 1
110 (!!!!! 4011.869430542): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.id=294740548 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (825.88195800781): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets_archive as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.id=294740548 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (834.22660827637): SELECT dp.name, dp.id, dp2.name as channel, ex.name as author_name, ex.specialization, ex.images FROM jos_deeppockets as dp LEFT JOIN jos_experts as ex ON ex.id = dp.author LEFT JOIN jos_deeppockets as dp2 ON dp2.id = dp.fid WHERE dp.author != 0 AND dp.cat = 10 AND dp.published = 1 AND ( (dp.fid = 294743300) OR (dp.fid = 294743301) OR (dp.fid = 294743302) OR (dp.fid = 294743303) OR (dp.fid = 294743304) OR (dp.fid = 294743305) OR (dp.fid = 294743306) OR (dp.fid = 294743307) OR (dp.fid = 294743308) OR (dp.fid = 294743309) OR (dp.fid = 294743310) ) ORDER BY RAND() LIMIT 1
113 (!!!!! 4658.9374542236): SELECT dp.name, dp.id, dp2.name as channel, ex.name as author_name, ex.specialization, ex.images FROM jos_deeppockets as dp LEFT JOIN jos_experts as ex ON ex.id = dp.author LEFT JOIN jos_deeppockets as dp2 ON dp2.id = dp.fid WHERE dp.author != 0 AND dp.cat = 10 AND dp.published = 1 AND ( (dp.fid = 294743300) OR (dp.fid = 294743301) OR (dp.fid = 294743302) OR (dp.fid = 294743303) OR (dp.fid = 294743304) OR (dp.fid = 294743305) OR (dp.fid = 294743306) OR (dp.fid = 294743307) OR (dp.fid = 294743308) OR (dp.fid = 294743309) OR (dp.fid = 294743310) ) ORDER BY RAND() LIMIT 1
114 (120.87821960449): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND published='1' LIMIT 1
115 (96.08268737793): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND published='1' LIMIT 1
116 (77.009201049805): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND published='1' LIMIT 1
117 (56.028366088867): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND published='1' LIMIT 1
118 (63.896179199219): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND published='1' LIMIT 1
119 (56.982040405273): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND published='1' LIMIT 1
120 (48.87580871582): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND published='1' LIMIT 1
121 (41.007995605469): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND published='1' LIMIT 1
122 (597.95379638672): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 62777.042388916): SELECT * FROM jos_deeppockets WHERE jos_deeppockets.cat = 10 AND jos_deeppockets.type = 'deeppockets_item' AND jos_deeppockets.published = 1 AND jos_deeppockets.created + INTERVAL 14 DAY >= NOW() ORDER BY jos_deeppockets.hits DESC LIMIT 7
124 (724.07722473145): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294740548 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294740548 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 26257.991790771): ( SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.video != '' AND dp.video_source != '' AND dp.cat = 10 AND dp.published = 1 AND dp.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) UNION ( SELECT dpa.id, dpa.name, dpa.title, dpa.video, dpa.video_source, dpa.created FROM jos_deeppockets_archive AS dpa WHERE dpa.video != '' AND dpa.video_source != '' AND dpa.cat = 10 AND dpa.published = 1 AND dpa.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) ORDER BY created DESC LIMIT 3
126 (90.122222900391): ( SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.video != '' AND dp.video_source != '' AND dp.cat = 10 AND dp.published = 1 AND dp.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) UNION ( SELECT dpa.id, dpa.name, dpa.title, dpa.video, dpa.video_source, dpa.created FROM jos_deeppockets_archive AS dpa WHERE dpa.video != '' AND dpa.video_source != '' AND dpa.cat = 10 AND dpa.published = 1 AND dpa.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) ORDER BY created DESC LIMIT 3
127 (60.081481933594): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803337 LIMIT 1
128 (49.114227294922): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803337 LIMIT 1
129 (!!!!! 5064.9642944336): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803276 LIMIT 1
130 (!!!!! 4522.0851898193): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803276 LIMIT 1
131 (!!!!! 3443.0027008057): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets_archive AS dp WHERE dp.id = 294803276 LIMIT 1
132 (!!!!! 5789.041519165): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets_archive AS dp WHERE dp.id = 294803276 LIMIT 1
133 (!!!!! 2246.8566894531): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294802958 LIMIT 1
134 (!!!!! 5714.1780853271): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294802958 LIMIT 1
135 (!!!!! 3641.8437957764): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (649.92904663086): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (57.220458984375): SELECT name FROM jos_deeppockets WHERE id=211
138 (36.954879760742): SELECT name FROM jos_deeppockets WHERE id=211
139 (968.93310546875): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))211((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (892.87757873535): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))211((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (!!!!! 4770.040512085): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND published='1' LIMIT 1
142 (216.96090698242): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND published='1' LIMIT 1
143 (!!!!! 24655.818939209): TRUNCATE TABLE jos_trademed_module
144 (411.9873046875): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=294740548 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (!!!!! 4033.088684082): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets_archive as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=294740548 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (!!!!! 2908.9450836182): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (186.92016601562): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (199.0795135498): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND published='1' LIMIT 1
149 (78.916549682617): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND published='1' LIMIT 1
150 (!!!!! 1670.1221466064): SELECT jos_item.* FROM jos_item INNER JOIN jos_number ON jos_item.numberID=jos_number.id WHERE 1=1 AND (jos_item.imgMini<>'') AND jos_item.type='L' AND jos_item.numberID= ( SELECT jos_number.id FROM jos_number WHERE jos_number.journalID IN (10) and jos_number.id in (select distinct jos_number.id from jos_number join jos_item on jos_item.numberid=jos_number.id where jos_item.type='P') ORDER BY (CONVERT(SUBSTRING(issue,1,2),SIGNED) + (CONVERT(SUBSTRING(issue,3,2),SIGNED)*100)) DESC LIMIT 0,1 ) ORDER BY RAND() DESC LIMIT 6
151 (!!!!! 3853.0826568604): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND published='1' LIMIT 1
152 (!!!!! 3425.8365631104): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND published='1' LIMIT 1
153 (!!!!! 2164.8406982422): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294740548 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294740548 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (682.83081054688): select distinct links.* from jos_textlinks links join jos_textlinks_placement placement on links.id=placement.link_id where journal_id=(10) and (channel_id=211 or channel_id is null)
155 (49.829483032227): select distinct links.* from jos_textlinks links join jos_textlinks_placement placement on links.id=placement.link_id where journal_id=(10) and (channel_id=211 or channel_id is null)
156 (39.100646972656): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (96.08268737793): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND published='1' LIMIT 1
158 (82.015991210938): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294740548 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294740548 AND published='1' LIMIT 1
159 (81.062316894531): select jos_twitters.link from jos_twitters where cat=10
160 (47.206878662109): select jos_facebook.link from jos_facebook where cat=10
161 (70.810317993164): select jos_google_plus.link from jos_google_plus where cat=10
162 (47.922134399414): select jos_linkedin.link from jos_linkedin where cat=10
163 (!!!!! 3188.1332397461): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
164 (!!!!! 1318.9315795898): insert into jos_banners_delta values (14615,'2025-08-19 19:38:51','216.73.216.0','view'),(14202,'2025-08-19 19:38:51','216.73.216.0','view'),(14203,'2025-08-19 19:38:51','216.73.216.0','view')