passages: 3852
passages: document
passages: Fluoroscopic functional evaluation of bileaflet prostheses : effect of different intraoperative valve orientation . Fluoroscopy is a reliable , easy , and readily available technique to follow-up prosthesis functioning after heart valve surgery . The different orientation given to the prosthesis may represent a limitation of the technique accounting for unsatisfactory results in 10 % to 40 % of the cases . The aim of the study was to evaluate whether and to what extent different intraoperative valve orientation influence feasibility and accuracy of postoperative fluoroscopic evaluation of bileaflet prostheses . We prospectively evaluated 90 patients who had aortic , mitral , and/or tricuspid valve replacement with Sorin Bicarbon or CarboMedics bileaflet prostheses . Fifty percent of the patients in each group were randomly assigned to receive prostheses oriented in a perpendicular or a parallel position with respect to the ventricular septum . Fluoroscopic evaluation was considered appropriate when the prosthesis ' " tilting disk " projection was obtained . The valve 's hemodynamic performance was investigated through Doppler study . A proper fluoroscopic evaluation was rapidly ( 15 +/- 5 seconds ) achieved in all patients with the former orientation , whereas it was impossible to obtain it in 8 of 20 ( 40 % ) , 19 of 20 ( 95 % ) , and 4 of 5 ( 80 % ) of patients with the latter orientation . In the remaining patients extremely angulated , uneasy projection was often required to get a correct fluoroscopic image . The Doppler study showed a similarly favorable hemodynamic performance regardless of valve orientation . Prosthesis orientation crucially affects the rate of success of the fluoroscopic evaluation . The orientation perpendicular to the ventricular septum greatly facilitates the postoperative feasibility and accuracy of fluoroscopy , and it is not detrimental to the valve 's hemodynamic performance . This valve orientation may provide a better fluoroscopic window whenever a valve dysfunction is suspected .
entities: 3853
entities: Intervention_Surgical
entities: bileaflet prostheses :
entities: 3854
entities: Intervention_Surgical
entities: bileaflet prostheses .
entities: 3855
entities: Intervention_Surgical
entities: Sorin Bicarbon or CarboMedics bileaflet prostheses .
entities: 3856
entities: Intervention_Surgical
entities: prostheses
entities: 3857
entities: Intervention_Surgical
entities: Prosthesis
entities: 3858
entities: Outcome_Other
entities: feasibility
entities: 3859
entities: Outcome_Other
entities: accuracy
entities: 3860
entities: Outcome_Physical
entities: hemodynamic performance
entities: 3861
entities: Outcome_Physical
entities: fluoroscopic evaluation
entities: 3862
entities: Outcome_Physical
entities: hemodynamic performance
entities: 3863
entities: Outcome_Other
entities: rate of success of the fluoroscopic evaluation
entities: 3864
entities: Outcome_Physical
entities: .
entities: 3865
entities: Outcome_Other
entities: feasibility
entities: 3866
entities: Outcome_Other
entities: accuracy of fluoroscopy
entities: 3867
entities: Outcome_Physical
entities: valve 's hemodynamic performance .
entities: 3868
entities: Outcome_Physical
entities: fluoroscopic
entities: 3869
entities: Participant_Sample-size
entities: 90
entities: 3870
entities: Participant_Condition
entities: patients who had aortic , mitral , and/or tricuspid valve replacement with Sorin Bicarbon or CarboMedics bileaflet prostheses