PULMONARY FUNCTION DERANGEMENTS IN ISOLATED OR PREDOMINANT MITRAL STENOSIS - PREOPERATIVE EVALUATION WITH CLINICO-HEMODYNAMIC CORRELATION Article Parvathy Usha, Rajesh Rajan, Faybushevich A.G. Interventional Medicine and Applied Science. Akademiai Kiado Rt.. Vol. Vol6(2). 2014. P. 75-84