[Emergency hybrid surgery for ruptured aortic arch aneurysm--a case report].

We describe a case of 67-year-old man suffering from chronic aortic arch aneurysm complicated by rupture and hemorrhage to the left pleural cavity. The patient underwent emergency hybrid operation: extraanatomical transposition of aortic arch branches to ascending aorta and implantation of stentgraft into the arch without the extracorporeal circulation.

Influence of low molecular weight heparin preparations on human internal thoracic artery contraction.

Objective: Low molecular weight heparins (LMWHs) offer practical and potential pharmacological advantages over unfractionated heparin in multiple applications but have not been studied as vasoactive agents. The purpose of this study was to investigate the effects of two commercial preparations of LMWHs, enoxaparin sodium and nadroparin calcium, on vasoconstriction in the human internal thoracic artery (ITA) in vitro.

Methods: Samples of redundant ITA segments obtained from 36 patients who underwent coronary artery bypass surgery were cut into 3mm wide rings and suspended in 20 ml organ bath.