Document Detail

Computerized acoustic cardiographic insights into the pericardial knock in constrictive pericarditis.
MedLine Citation:
PMID:  17803226     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: One of the clinical hallmarks of constrictive pericarditis is the pericardial knock, a high-pitched early diastolic heart sound. Making the clinical diagnosis of constrictive pericarditis is challenging, as is accurate auscultation of the pericardial knock. HYPOTHESIS: We sought to assess the utility of a computerized acoustic cardiographic device in the assessment of the pericardial knock in patients with constrictive pericarditis. METHODS: We report a case series in which computerized acoustic cardiography (Audicor, Inovise Medical Inc., Portland, OR) is performed in patients with constrictive pericarditis. RESULTS: Three patients with constrictive pericarditis underwent computerized acoustic cardiographic recordings at the time of cardiac catheterization. In each case, initial physical examination by the internist and referring cardiologist did not appreciate a pericardial knock. Acoustic cardiography demonstrated a high-pitched early diastolic sound in each case. Time-frequency representation analyses showed the high-frequency components of the pericardial knock sound. Repeat acoustic cardiography demonstrated resolution of the pericardial knock after pericardiectomy in two patients. CONCLUSIONS: Non-invasive computerized acoustic cardiography can demonstrate the high-pitched pericardial knock in patients with constrictive pericarditis. This may aid the bedside assessment of patients with diastolic heart failure, improving the clinician's ability to appreciate the ausculatory findings in constrictive pericarditis.
Andrew D Michaels; Mohan N Viswanathan; Mark V Jordan; Kanu Chatterjee
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Publication Detail:
Type:  Case Reports; Journal Article    
Journal Detail:
Title:  Clinical cardiology     Volume:  30     ISSN:  0160-9289     ISO Abbreviation:  Clin Cardiol     Publication Date:  2007 Sep 
Date Detail:
Created Date:  2007-09-12     Completed Date:  2007-10-31     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7903272     Medline TA:  Clin Cardiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  450-8     Citation Subset:  IM    
Copyright Information:
(c) 2007 Wiley Periodicals, Inc.
Division of Cardiology, Department of Medicine, University of Utah, Salt Lake City, Utah 84132-2401, USA.
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MeSH Terms
Diagnosis, Differential
Heart Sounds*
Middle Aged
Pericarditis, Constrictive / diagnosis*,  physiopathology*
Signal Processing, Computer-Assisted

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

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