Document Detail

A nomogram for measurement of mitral valve area by proximal isovelocity surface area method.
MedLine Citation:
PMID:  17767526     Owner:  NLM     Status:  MEDLINE    
INTRODUCTION: Although its accuracy has been documented in many studies, the proximal isovelocity surface area (PISA) method is not used widely for mitral valve area (MVA) measurement. In this study, we prepared a new nomogram and tested its use in MVA assessment. MATERIAL AND METHODS: The study included 23 patients (age: 27 +/- 5 years) with mitral stenosis, of whom 7 were in atrial fibrillation. The MVA was measured by four methods: planimetry (PL) (reference method), pressure-half time (PHT), conventional PISA (CP), and nomogram (Nomo) methods. The nomogram included two unknowns: (1) r; the radius of the first PISA section; (2) a; the length of the border opposite to the PISA angle in the triangle with both adjacent borders of 1 cm. The nomogram was also tested for its popularity potential by eight echocardiographers, none of whom were included in the author list. RESULTS: Mean MVA(PL) was 1.85 +/- 0.53 cm(2) (range: 0.72-2.99), mean MVA(PHT) was 1.72 +/- 0.56 cm(2) (range: 0.91-3.30), mean MVA(CP) was 1.69 +/- 0.45 cm(2) (range: 0.97-2.54), and MVA(Nomo) was 1.70 +/- 0.44 cm(2) (0.96-2.49). The nomogram correlated with planimetry (r = 0.87; P < 0.001), pressure half-time (r = 0.71; P < 0.001) and conventional PISA (r = 0.99; P = 0.000) methods. The nomogram method also correlated with planimetry in patients with atrial fibrillation (r = 0.81; P = 0.026). The echocardiographers found that the nomogram is superior to the planimetry and conventional PISA methods but inferior to the pressure half-time method in terms of simplicity. CONCLUSION: The new nomogram is potentially helpful in measurement of MVA. It may be used as an additional method in assessing severity of mitral stenosis.
Mehmet Uzun; Oben Baysan; Celal Genc; Mehmet Yokusoglu; Hayrettin Karaeren; Ersoy Isik
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Echocardiography (Mount Kisco, N.Y.)     Volume:  24     ISSN:  0742-2822     ISO Abbreviation:  Echocardiography     Publication Date:  2007 Sep 
Date Detail:
Created Date:  2007-09-04     Completed Date:  2008-01-24     Revised Date:  2008-09-19    
Medline Journal Info:
Nlm Unique ID:  8511187     Medline TA:  Echocardiography     Country:  United States    
Other Details:
Languages:  eng     Pagination:  783-8     Citation Subset:  IM    
Gulhane Military Medical Academy, Department of Cardiology, Barisyolu Cd. No: 4/3 Esertepe, Ankara, Turkey.
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MeSH Terms
Echocardiography, Doppler / methods*
Mitral Valve / pathology,  ultrasonography*
Mitral Valve Stenosis / pathology,  physiopathology,  ultrasonography*
Reproducibility of Results
Comment In:
Echocardiography. 2008 May;25(5):551; author reply 552   [PMID:  18452476 ]

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