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Comparison of transendocardial and retrograde coronary venous intramyocardial catheter delivery systems in healthy and infarcted pigs
Dartmouth Medical School, Hanover, NH, USA.
Dartmouth Medical School, Hanover, NH, USA.
Dartmouth Medical School, Hanover, NH, USA.
Guidant Corp., Santa Clara, CA, USA.
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2006 (English)In: Catheterization and cardiovascular interventions, ISSN 1522-1946, E-ISSN 1522-726X, Vol. 68, no 3, 416-423 p.Article in journal (Refereed) Published
Abstract [en]

We compared two routes for myocardial delivery of therapeutics, transendocardial (TE) delivery with an intramyocardial injection catheter, and retrograde coronary venous (RCV) delivery with a balloon occlusion catheter in the interventricular vein. Methods: TE and RCV injection of 15 mu m, neutron-activatable microspheres was compared in healthy pigs (Group I, n = 3), pigs with a 1-week-old myocardial infarction (MI; group II, n = 5), and pigs with a 2-weeks-old MI (group III, n = 4). The MI was induced by a 1-hr balloon occlusion in the LAD. Both methods were compared in the same animal using different microspheres. The RCV catheter allowed for continuous measurement of distal pressure and 2.5 x 10(6) microspheres were injected in 10 ml at 300 mmHg above balloon occlusion pressure. The TE injections were targeted to the infarct zone and 2.5 x 10(6) microspheres were distributed over 10 injections of 200 mu l. Results: The retention of microspheres decreased with increase in MI age, but was comparable between devices within the groups. RCV delivery resulted in (14.3 +/- 0.9)% microsphere retention in Group I, (10.3 +/- 0.2)% in Group II, and (6.4 +/- 0.1)% in group III (P less than 0.05 versus group I). Microsphere retention after TE was (15.1 +/- 0.7)% in group I, (18.9 +/- 0.6)% in group II, (4.1 +/- 0.1)% in Group III (P less than 0.05 versus groups I and II). The RCV catheter delivered primarily to midventricular, antero-septal segments, whereas TE targeted apical areas predominantly. Conclusions: Delivery efficacy was comparable between devices in each group however RCV targeted midventricular areas whereas TE targeted apical areas.

Place, publisher, year, edition, pages
Wiley-Blackwell, 2006. Vol. 68, no 3, 416-423 p.
Keyword [en]
myocardial infarction; percutaneous cardiac intervention; microspheres; myocardial uptake
National Category
Medical and Health Sciences Engineering and Technology
URN: urn:nbn:se:liu:diva-99967DOI: 10.1002/ccd.20841ISI: 000240302100015PubMedID: 16892441OAI: diva2:659151
Available from: 2013-10-24 Created: 2013-10-24 Last updated: 2013-11-04Bibliographically approved

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de Muinck, Ebo D.
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