The multifunctional, electrophysiological diagnostic catheter for electrocardiologic treatments includes a distal end, diagnostic rings, a balloon, a main channel, a manipulation handgrip, functional connection and internal channels. There is an internally-located open central channel, wherein inlet/outlet of an internal channel is located in the distal ring. There is a pumping channel for pumping up and pumping out of the occlusion-stabilizing balloon located after the diagnostic rings. There is a division of a central channel into two branches in the region of the catheter proximal end.
