[Improved methods for transseptal left heart catheterization].

Although the transseptal approach is useful for evaluation of reliable hemodynamics, this technique is not used commonly for its invasive procedure. We report a new technique for transseptal left heart catheterization utilizing J-shaped guide wire (0.018 inch). The guide wire is available for protecting the atrial wall from perforation by transseptal needle. Transseptal approach was performed by this technique in 58 patients with aortic valvular disease and mitral stenosis, including 6 cases of percutaneous transluminal mitral commissurotomy. We conclude that the J-shaped guide wire and the new technique make transseptal approach a safe and reliable procedure for even inexperienced hands.