title: Control of endoaortic clamp position during Port-Access mitral valve operations using transcranial Doppler echography.
abstract: The technique of computer-aided transcranial Doppler echography for continuous control of cerebral perfusion during minimally invasive mitral valve operations using the Port-Access system is described. Temporary displacement of the endoclamp in the aortic arch (brachiocephalic trunk, left carotid artery) is followed by cerebral embolic signals and a sudden decrease in the blood flow velocity in the middle cerebral arteries.
authors.affiliation: Department of Cardiac Surgery, Herzzentrum, Universität Leipzig, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Schneider
authors.forename: V
authors.initials: V
authors.lastname: Falk
authors.forename: T
authors.initials: T
authors.lastname: Walther
authors.forename: F W
authors.initials: FW
authors.lastname: Mohr
mesh_terms: D001011:Aorta / Q000601:surgery*; D001783:Blood Flow Velocity; D016122:Brachiocephalic Trunk / Q000000981:diagnostic imaging; D002315:Cardiopulmonary Bypass / Q000295:instrumentation* / Q000379:methods; D002339:Carotid Arteries / Q000000981:diagnostic imaging; D002408:Catheters, Indwelling / Q000009:adverse effects; D002536:Cerebral Arteries / Q000000981:diagnostic imaging; D002560:Cerebrovascular Circulation; D003250:Constriction; D003936:Diagnosis, Computer-Assisted; D005547:Foreign Bodies / Q000150:complications / Q000000981:diagnostic imaging; D006801:Humans; D002542:Intracranial Embolism and Thrombosis / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D019060:Minimally Invasive Surgical Procedures; D008943:Mitral Valve / Q000601:surgery*; D017585:Ultrasonography, Doppler, Transcranial; D018084:Ultrasonography, Interventional