Document Detail

New method for monitoring the functional state of a dynamic cardiomyoplasty.
MedLine Citation:
PMID:  9434705     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To assess the impact of a dynamic cardiomyoplasty on failing hearts, it is essential to estimate the contraction force of the skeletal muscle and how its contraction is synchronized with the heart cycle. METHODS: In a 6-month study a small fluid-filled, balloon-mounted catheter was placed between the myocardium and the muscular wrap in five adult female Boor goats and two female domestic pigs. The catheter was connected to a subcutaneous measuring chamber whereby pressure monitoring could be accomplished. Distinct pressure signals as a result of function of the dynamic cardiomyoplasty and the heart were detected initially in all animals. RESULTS: Maximal relative pressure from the dynamic cardiomyoplasty was calculated as 336.2% +/- 69.4% on day 24 +/- 6.1 (n = 7) and end-stage pressure as 59.8% +/- 9.7% on day 174.6 +/- 13.1 (n = 4). A functional loss of pressure signals from the dynamic cardiomyoplasty was correlated to severe histologic muscle damage (n = 3). Pressure signals transferred from the contracting myocardium to the catheter showed defined segments of contraction, ejection, and filling periods, allowing a mechanical synchronization of the dynamic cardiomyoplasty to the heart cycle. CONCLUSIONS: This monitoring catheter enabled the assessment of the functional state of the dynamic cardiomyoplasty and allowed a synchronization to the heart cycle. It will promote understanding and might help to avoid muscle damage in dynamic cardiomyoplasty for an improved outcome of the surgical treatment of end-stage heart failure.
N W Guldner; P Klapproth; J M Hasenkam; T Fischer; R Keller; R Noel; B Keding; E Joubert-Hübner; H Kuppe; H H Sievers
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of thoracic and cardiovascular surgery     Volume:  114     ISSN:  0022-5223     ISO Abbreviation:  J. Thorac. Cardiovasc. Surg.     Publication Date:  1997 Dec 
Date Detail:
Created Date:  1998-02-12     Completed Date:  1998-02-12     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0376343     Medline TA:  J Thorac Cardiovasc Surg     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1097-106     Citation Subset:  AIM; IM    
Clinic of Cardiac Surgery, Medical University of Lübeck, Germany.
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MeSH Terms
Balloon Dilatation / methods*
Heart Catheterization / methods*
Monitoring, Physiologic / methods
Muscle Contraction / physiology
Muscle, Skeletal / pathology,  physiology
Myocardial Contraction / physiology
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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