Key result
BSA-based mitral annular size formulae fail to accurately predict implanted prosthesis size.
Why the study?
Do prediction formulae based on body surface area accurately predict the size of mitral valve prostheses in patients undergoing mitral valve replacement?
Observational (n=92)
Do prediction formulae based on body surface area accurately predict the size of mitral valve prostheses in patients undergoing mitral valve replacement?
Prediction formulae for mitral annular size based on body surface area do not accurately predetermine the size of mitral valve prosthesis needed at operation.
BSA-based mitral sizing formulae were inaccurate in this cohort; hypothesis-generating and should not yet alter intraoperative prosthesis selection.
Several formulae related to body surface area have been proposed to predict normal mitral annular size. This study examined the applicability of such formulae in predicting the size of mitral valve prostheses. Developmental criteria and echocardiographic parameters were used retrospectively to determine mitral annular size in 92 consecutive patients undergoing mitral valve replacement. Discrepancies were noted among the different predicted annular diameters. Moreover, predicted diameters differed from the diameters of the implanted prostheses. These differences were not influenced by type of prosthesis, type of lesion, technique of surgery, or sex of the patient. A greater degree of disparity was noted for larger body surface areas with all prediction formulae. However, valve size index and valve area index remained incremental with increasing prosthesis size. It was concluded that prediction formulae for mitral annular size based on body surface area do not help the surgeon to predetermine the size of mitral valve prosthesis that may be implanted at operation.
No takes yet. Share an insight, caveat, or question.
Ghosh et al. (1999) conducted an observational in Mitral valve replacement (n=92). Prediction formulae for mitral annular size based on body surface area vs. Actual implanted prosthesis size was evaluated on Discrepancy between predicted annular diameters and implanted prosthesis diameters. Prediction formulae for mitral annular size based on body surface area did not accurately predetermine the size of the implanted mitral valve prosthesis in 92 patients.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: