Document Detail

"Hands-Free" continuous echocardiography during treadmill exercise using a novel ultrasound transducer.
MedLine Citation:
PMID:  20214674     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Echocardiographic imaging using a handheld transducer in conjunction with treadmill exercise testing is commonly used for the diagnosis of coronary artery disease. Motion of the hand and the transducer during peak exercise preclude optimal imaging. To circumvent the limitations of handheld transducers, we developed a low profile transducer (CONTISON) which can be attached to the chest wall for continuous cardiac imaging. METHODS AND RESULTS: This feasibility study was performed in 10 normal male subjects (28 to 36 years). The ultrasound transducer was placed in the third or fourth intercostal space at the left sternal border to permit imaging of the left ventricle in its short axis. The transducer was interfaced with a commercially available ultrasound machine. The left ventricle was imaged at rest and while subjects exercised according to a standard Bruce protocol. All segments of the left ventricular short axis were seen at rest and peak exercise. Increased left ventricular wall thickening and wall motion were seen at peak exercise. There were no complications from the procedure. CONCLUSION: We demonstrated the feasibility of hands-free left ventricular imaging during treadmill exercise using the CONTISON transducer. Further evaluation of the technique to detect stress-induced wall motion abnormalities, as a means of diagnosing myocardial ischemia, appears warranted. (ECHOCARDIOGRAPHY 2010;27:563-566).
P A N Chandraratna; Ranil Gajanayaka; Surendra M Makkena; Kanishka Wijegunaratne; Haroon Hafeez; Sridhar Vijayasekaran; Asghar Ali
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Publication Detail:
Type:  Journal Article     Date:  2010-03-01
Journal Detail:
Title:  Echocardiography (Mount Kisco, N.Y.)     Volume:  27     ISSN:  1540-8175     ISO Abbreviation:  Echocardiography     Publication Date:  2010 May 
Date Detail:
Created Date:  2010-07-08     Completed Date:  2010-10-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8511187     Medline TA:  Echocardiography     Country:  United States    
Other Details:
Languages:  eng     Pagination:  563-6     Citation Subset:  IM    
Cardiology Division, LAC and USC Medical Center, Los Angeles, CA 90822, USA.
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MeSH Terms
Blood Pressure / physiology
Coronary Artery Disease / ultrasonography
Echocardiography / instrumentation*,  methods*
Exercise Test
Feasibility Studies
Heart Rate / physiology
Thoracic Wall

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

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