Document Detail


New approach to intracardiac hemodynamic measurements in small animals: echo-guided percutaneous apical puncture.
MedLine Citation:
PMID:  22837287     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Objectives- Invasive measurements of intracardiac hemodynamics in animal models have allowed important advances in the understanding of cardiac disease. Currently they are performed either through a carotid arteriotomy or via a thoracotomy and apical insertion. Both of these techniques have disadvantages and are not conducive to repeated measurements. Therefore, the purpose of this study was to develop a new technique for measuring intracardiac hemodynamics. Methods- In 13 male rats, hemodynamic measurements were performed using a new echocardiographically guided percutaneous apical technique. An intravenous catheter was percutaneously inserted into the left ventricle (LV) in the direction of the LV long axis. Through this catheter, a micromanometer-tipped pressure catheter was inserted, and invasive hemodynamic traces were recorded. After LV recordings, the pressure catheter was advanced into the aorta where pressures were obtained. In 11 rats, measurements were repeated after 1 week (n = 2), 2 weeks (n = 4), 3 weeks (n = 4), or 4 weeks (n = 1). In 3 rats, invasive measurements were performed using a carotid arteriotomy before the percutaneous technique. Results- Among the 13 rats subjected to the procedure, the survival rate was 85%. Of the 11 rats that had the procedure repeated, 3 died (27%). The mean differences ± SD when comparing the two techniques were 10 ± 4 mm Hg for the LV end-systolic pressure and 1 ± 1 mm Hg for the LV end-diastolic pressure. The mean procedure times were 21 ± 3 and 6 ± 1 minutes for the carotid and percutaneous techniques, respectively. Conclusions- We have successfully developed a percutaneous technique for insertion of LV microtip catheters in rats.
Authors:
Kristian Eskesen; Niels T Olsen; Veronica L Dimaano; Aurelio Pinheiro; Peter Sogaard; Thomas Fritz-Hansen; Lars L Sorensen; Theodore P Abraham
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine     Volume:  31     ISSN:  1550-9613     ISO Abbreviation:  J Ultrasound Med     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-07-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8211547     Medline TA:  J Ultrasound Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1233-8     Citation Subset:  IM    
Affiliation:
Division of Cardiology, Johns Hopkins University, 910 N Wolfe St, Carnegie 568, Baltimore, MD 21287 USA., tabraha3@jhmi.edu.
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