An intravascular electrode arrangement 10 includes a first and a second electrode line 12, 14 adapted for placement in blood vessels such as veins or arteries, each having at least one stimulation and/or sensing electrode in the region of the distal end of the respective electrode line, wherein there are longitudinal guides 18, 18', 18'', 18''' provided externally on the first electrode line 12, 12', 12'', 12''' for the second electrode line 14.
