Discrepancy between mitral valve areas measured by two-dimensional planimetry and three-dimensional transoesophageal echocardiography in patients with mitral stenosis.

Objective: To compare mitral valve area (MVA) measurements obtained by 2D transthoracic planimetry and 3D transoesophageal echocardiography (TOE) in patients with mitral stenosis (MS), and to determine the causes of discrepancies between the two techniques.

Design: Reliability and agreement study.

Setting: Tertiary referral centre.