TY - GEN AU - Gronert,G A TI - Intra-atrial ECG guidance for positioning central vein catheters SN - 0007-0912 PY - 2004///0414 KW - Catheterization, Central Venous KW - methods KW - Echocardiography KW - Humans KW - Ultrasonography, Interventional N1 - Publication Type: Comment; Letter ER -