Copyright © 2006, The European Society of Cardiology
The PISA method simplified
Gulhane Military Medical Academy, Department of Cardiology, Gen. Tevfik Saglam Cd. Etlik, 06018 Ankara, Turkey
Received 12 September 2006; received in revised form 1 October 2006; accepted after revision 6 October 2006.
* Corresponding author. Tel.: +90 312 3258974; fax: +90 312 3044250. muzun1@yahoo.com
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We have read with interest the study by Messika-Zeitoun et al.1 showing that using a fixed angle value of 100° provides an accurate estimation of the miral valve area (MVA) by the proximal isovelocity surface area (PISA) method in patients with mitral stenosis (MS). We appreciate the study as a means