Selective left heart angiocardiography by the transseptal route

A technic for performing selective left atrial and left ventricular angiocardiography by means of percutaneous transseptal left heart catheterization is described and the results of such studies performed in sixty patients are presented. The clinical applications of this technic in the study of patients with various forms of obstruction to left ventricular outflow, various types of mitral valve lesions, defects of the ventricular septum and anomalies of the aortic arch are discussed in detail.