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MRI Proves Effective Guiding Heart Catheter Procedures

By MedImaging International staff writers
Posted on 24 Oct 2012
Heart catheter procedures guided by magnetic resonance imaging (MRI) are as safe as X-ray-guided procedures and do not take any longer, according to a pilot study. The findings indicate that real-time MRI-guided catheterization could be a radiation-free option to specific X-ray-guided procedures.

A report of the study, which was conducted by researchers within the intramural program of the US National Institutes of Health’s (NIH; Bethesda, MD, USA) National Heart, Lung, and Blood Institute (NHLBI), is available online October 2012 in the European Heart Journal. “This could be the first chapter of a big story,” said Robert S. Balaban, PhD, scientific director of the NHLBI’s Division of Intramural Research. “It provides evidence that clinical heart catheter procedures are possible without using radiation, which could be especially valuable in areas such as pediatrics.”

Typically, X-ray fluoroscopy pictures have higher resolution but less detail than MR images. The investigators performed transfemoral catheterization (which involves threading a catheter from the large vein in the leg to the heart) in 16 patients to evaluate the right side of the heart, including the attached veins and the pulmonary arteries. The study participants all required catheterization for heart and valve disease. The researchers conducted the procedure in the 16 patients using X-ray guidance, and then repeated it two times using real-time MRI guidance of a balloon-tipped catheter filled with air or with a contrast agent.

The X-ray and MR catheterizations were effective in 15 of the 16 participants. One patient had required the use of a wire to help guide the catheter under X-ray, and at present no guidewires are available that work under an MRI. The median procedure time for the two approaches was comparable-- approximately 20 minutes. The investigators anticipated the MRI-guided procedure to take much longer because an MRI-compatible catheter can be harder to see in an MRI-generated image than a traditional steel catheter can be in an X-ray-generated image.

“Developing safe and conspicuous catheter devices for MRI is the chief obstacle to overcome before this approach can be widely applied at hospitals,” said study lead Robert J. Lederman, MD, a senior investigator in the NHLBI’s Cardiovascular and Pulmonary Branch. “But with improved tools and further improvement of the procedure, real-time MRI catheterization may become a realistic option for many people.”

Dr. Lederman’s research group is still performing MRI catheterization on further patients, and is currently designing improved catheters and other application that will be more observable under MRI to help advance the technology. The NHLBI investigators also hope to utilize MRI to guide nonsurgical catheter treatments in the future, in addition to guiding catheter procedures.

NHLBI plans, conducts, and supports research related to the causes, prevention, diagnosis, and treatment of heart, blood vessel, lung, and blood diseases; and sleep disorders. The Institute also administers US health education campaigns on healthy weight for children, women and heart disease, and other topics.

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US National Heart, Lung, and Blood Institute



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92 (28.848648071289): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (154.97207641602): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (141.14379882812): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (31.948089599609): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (!!!!! 1947.8797912598): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (36.954879760742): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (30.040740966797): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (31.948089599609): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (28.848648071289): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (77.009201049805): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND published='1' LIMIT 1
105 (51.021575927734): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND published='1' LIMIT 1
106 (112.05673217773): 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=294743077 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (56.982040405273): 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=294743077 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (65.803527832031): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND published='1' LIMIT 1
109 (45.061111450195): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND published='1' LIMIT 1
110 (63.180923461914): 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=294743077 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (428.91502380371): 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=294743077 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (544.07119750977): 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 (300.88424682617): 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 (72.956085205078): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND published='1' LIMIT 1
115 (44.107437133789): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND published='1' LIMIT 1
116 (46.968460083008): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND published='1' LIMIT 1
117 (36.954879760742): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND published='1' LIMIT 1
118 (51.021575927734): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND published='1' LIMIT 1
119 (54.121017456055): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND published='1' LIMIT 1
120 (49.114227294922): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND published='1' LIMIT 1
121 (38.14697265625): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND published='1' LIMIT 1
122 (168.0850982666): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 18385.171890259): 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 (406.98051452637): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294743077 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294743077 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 6892.204284668): ( 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 (85.115432739258): ( 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 (190.01960754395): 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 (38.862228393555): 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 (122.7855682373): 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 (58.174133300781): 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 (106.0962677002): 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 (31.948089599609): 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 (149.01161193848): 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 (36.001205444336): 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 (335.9317779541): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (234.84230041504): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (134.94491577148): SELECT name FROM jos_deeppockets WHERE id=212
138 (41.961669921875): SELECT name FROM jos_deeppockets WHERE id=212
139 (735.99815368652): 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 '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (637.05444335938): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))212((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (67.949295043945): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND published='1' LIMIT 1
142 (44.822692871094): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND published='1' LIMIT 1
143 (!!!!! 8127.9277801514): TRUNCATE TABLE jos_trademed_module
144 (159.02519226074): 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=294743077 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (81.062316894531): 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=294743077 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (998.02017211914): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (54.836273193359): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (57.93571472168): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND published='1' LIMIT 1
149 (46.014785766602): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND published='1' LIMIT 1
150 (!!!!! 1443.8629150391): 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 (73.19450378418): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND published='1' LIMIT 1
152 (46.968460083008): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND published='1' LIMIT 1
153 (37.908554077148): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294743077 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294743077 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (35.04753112793): 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=212 or channel_id is null)
155 (32.186508178711): 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=212 or channel_id is null)
156 (35.04753112793): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (130.17654418945): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND published='1' LIMIT 1
158 (66.995620727539): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294743077 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294743077 AND published='1' LIMIT 1
159 (112.05673217773): select jos_twitters.link from jos_twitters where cat=10
160 (42.915344238281): select jos_facebook.link from jos_facebook where cat=10
161 (41.007995605469): select jos_google_plus.link from jos_google_plus where cat=10
162 (39.100646972656): select jos_linkedin.link from jos_linkedin where cat=10
163 (350.9521484375): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14615,14202,14203)
164 (!!!!! 1061.2010955811): insert into jos_banners_delta values (14615,'2025-06-26 06:25:54','216.73.216.249','view'),(14202,'2025-06-26 06:25:54','216.73.216.249','view'),(14203,'2025-06-26 06:25:54','216.73.216.249','view')