Author/Editor		Fazarinc, G; Uršič, M; Lovšin, E; Juntes, P
Title		Parna sprednja velika dovodnica (vena cava cranialis dextra et sinistra) pri psu
Translated title		Paried cranial venae cavae (vena cava cranialis dextra et sinistra) in the dog
Type		članek
Source		Slov Vet Res
Vol. and No.		Letnik 38, št. 3
Publication year		2001
Volume		str. 257-62
Language		slo, eng
Abstract		This paper describes a case of paired cranial venae cavae (vena cava cranialis dextra et sinistra), which is a relatively rare occurrence in the dog. The right cranial vena cava (v. cava cranialis dext.) was in its usual position, while the left one (v. cava cranialis sin.) ran caudally, parallel to the right vessel, along the ventro-lateral side of the trachea, turned across the left aspect of the arch of the aorta and descended ventrally, between the dorsal aspect of the left auricle and the root of the lung, to reach the coronary sulcus. There it continued without any distinct transition to the grossly enlarged coronary sinus. Paired cranial venae cavae occur as a consequence of the non-development of a transverse anastomosis between the cranial cardinal veins during the period of organogenesis. The terminal part of the cranial cardinal vein did not regress but developed into the left cranial vena cava, which carried venous blood from the left cranial part of the animal's body, through the coronary sinus, to the right atrium.
Summary		V prispevku opisujemo primer parne sprednje velike dovodnice, kar je pri psu razmeroma redek in neobičajen pojav. Desna sprednja velika dovodnica (v. cava cranialis dext.) je imela običajen položaj, leva (v. cava cranialis sin.) pa je potekala v kavdalni smeri vzporedno z desno ob ventrolateralni strani sapnika, nato prek leve ploskve aortnega loka ter se spustila ventralno rned dorzalno ploskvijo levega uhljiča in pljučnim korenom do koronarnega žleba. Tu se je nadaljevala brez izrazitega prehoda v močno razširjen koronarni sinus. Pojav dvojne sprednje velike dovodnice je posledica izostalega razvoja prečne anastomoze med sprednjima kardinalnima venama v obdobju organogeneze. Končni del leve sprednje kardinalne vene ni regresiral, temveč se je izblikoval v levo sprednjo veliko dovodnico, po kateri se je stekala venska kri iz levega sprednjega dela telesa prek koronarnega sinusa v desni atrij.
Descriptors		VENA CAVA, SUPERIOR DOGS AUTOPSY