Document Detail

New balloon-thermography catheter for in vivo temperature measurements in human coronary atherosclerotic plaques: a novel approach for thermography?
MedLine Citation:
PMID:  12594700     Owner:  NLM     Status:  MEDLINE    
Although ex vivo studies showed marked thermal heterogeneity in atheromatic plaques, in in vivo human studies trivial temperature variations are recorded due to the cooling effect of blood flow. We investigated a new balloon-thermogaphy catheter for temperature measurements during coronary flow interruption. A thermistor probe is positioned at the distal segment of the catheter. At the opposite site of the thermistor, a balloon is placed. By inflation of the balloon, coronary flow is interrupted. Ten patients with effort angina were studied. Coronary flow velocity was continuously recorded. Temperature was recorded at the proximal vessel wall and at the lesion before, during, and after complete interruption of blood flow by inflation of the balloon. DeltaTp was assigned as the difference between the background temperature and the maximal temperature during and after balloon inflation. DeltaTl was assigned as the difference between the atherosclerotic plaque and the proximal vessel wall. The procedure was not complicated. DeltaTp during and after balloon inflation was 0.01 +/- 0.01 degrees C and -0.003 +/- -0.01 degrees C (P < 0.001), respectively. DeltaTl was 0.07 +/- 0.04 degrees C at baseline, 0.17 +/- 0.06 degrees C (59.3% +/- 11.8% increase) during, and 0.07 +/- 0.05 degrees C after flow interruption (P < 0.001). DeltaTl was greater than DeltaTp during and after impairment of flow (P < 0.001). In vivo atherosclerotic plaque temperature recording seems to be feasible with this new balloon-thermography catheter. This device may introduce a new approach for the detection of thermal heterogeneity in plaques by addressing the issue of cooling effect of blood flow.
Christodoulos Stefanadis; Konstantinos Toutouzas; Manolis Vavuranakis; Eleftherios Tsiamis; Sophia Vaina; Pavlos Toutouzas
Publication Detail:
Type:  Evaluation Studies; Journal Article    
Journal Detail:
Title:  Catheterization and cardiovascular interventions : official journal of the Society for Cardiac Angiography & Interventions     Volume:  58     ISSN:  1522-1946     ISO Abbreviation:  Catheter Cardiovasc Interv     Publication Date:  2003 Mar 
Date Detail:
Created Date:  2003-02-20     Completed Date:  2003-06-10     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  100884139     Medline TA:  Catheter Cardiovasc Interv     Country:  United States    
Other Details:
Languages:  eng     Pagination:  344-50     Citation Subset:  IM    
Copyright Information:
Copyright 2003 Wiley-Liss, Inc.
Department of Cardiology, Hippokration Hospital, Athens Medical School, Athens, Greece.
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MeSH Terms
Angina Pectoris / etiology,  physiopathology*,  radiography
Balloon Dilatation / instrumentation*
Blood Flow Velocity / physiology
Body Temperature / physiology*
Coronary Angiography
Coronary Artery Disease / complications,  physiopathology*,  radiography
Coronary Circulation / physiology
Equipment Design
Feasibility Studies
Middle Aged
Reproducibility of Results
Thermography / instrumentation*

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

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