Key result
Outflow patch placement in tetralogy of Fallot links to a ~21% higher RVEDV/LVEDV ratio.
Why the study?
Can pulmonary regurgitation be accurately quantified using biplane angiocardiograms to compare right and left ventricular stroke volumes in postoperative patients with tetralogy of Fallot?
Observational (n=18)
No
Can pulmonary regurgitation be accurately quantified using biplane angiocardiograms to compare right and left ventricular stroke volumes in postoperative patients with tetralogy of Fallot?
Answers are grounded in this paper and cite their sources.
Biplane angiocardiography can be used to quantify pulmonary regurgitation in postoperative tetralogy of Fallot patients by comparing right and left ventricular stroke volumes.
A method is described for quantifying pulmonary regurgitation. This method is based on a comparison of the right and left ventricular stroke volumes which are determined from biplane angiocardiograms. These techniques were applied to study 18 postoperative patients with tetralogy of Fallot. In patients with an outflow patch, regurgitant fraction was well correlated with regurgitant area. The RVEDV/LVEDV ratio was also correlated well with regurgitant fraction. Although majority of patients maintained normal RV ejection fraction, there were small number of patients with large regurgitant fraction and decreased RV ejection fraction.
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Furuse et al. (1977) conducted an observational in Tetralogy of Fallot (postoperative) (n=18). Outflow patch across the valvular annulus vs. No outflow patch was evaluated on RVEDV/LVEDV ratio (p=<0.02). Placement of an outflow patch across the valvular annulus in patients with tetralogy of Fallot was associated with a significantly greater RVEDV/LVEDV ratio compared to patients without a patch (1.32 vs 1.09, p<0.02).
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