Key result
The St. Jude Medical Hemodynamic Plus valve demonstrated significantly lower peak and mean pressure gradients and peak flow velocity compared to the standard valve of the same size (p < 0.05).
Why the study?
Does the St. Jude Medical Hemodynamic Plus valve improve hemodynamic performance compared to the standard St. Jude Medical valve in patients undergoing aortic valve replacement for a small aortic annulus?
Observational (n=65)
Does the St. Jude Medical Hemodynamic Plus valve improve hemodynamic performance compared to the standard St. Jude Medical valve in patients undergoing aortic valve replacement for a small aortic annulus?
The St. Jude Medical Hemodynamic Plus valve offers superior hemodynamic performance compared to the standard valve of the same size, performing equivalently to a standard valve one size larger.
Answers are grounded in this paper and cite their sources.
May support Hemodynamic Plus selection for small annuli; leaves open clinical outcome impact.
The hemodynamic performance of the St. Jude Medical Hemodynamic Plus valve (HP) for a small aortic annulus was compared to that of the standard St. Jude Medical valve (SJM). Doppler echocardiographic parameters were evaluated in patients undergoing aortic valve replacement with either a 19 mm HP (HP19, n = 7), a 21 mm HP (HP21, n = 8), a 19 mm SJM (SJM19, n = 16), or a 21 mm SJM (SJM21, n = 34). The peak and mean pressure gradients and peak flow velocity were significantly (p < 0.05) lower in both patients with the HP21 and those with the HP19 than patients with the SJM21 and those with the SJM19, respectively. The echocardiographic parameters of the patients with the HP19 corresponded closely to those of patients with the SJM21. The left ventricular mass index regressed markedly in patients with the HP19 during the late postoperative period. The results suggested that the hemodynamic performances of certain sizes of the HP were superior to those of the same size SJMs and were considered to be equivalent to those of the next size larger SJM.
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Hayashida et al. (1997) conducted an observational in Small aortic annulus requiring aortic valve replacement (n=65). St. Jude Medical Hemodynamic Plus valve (HP) vs. Standard St. Jude Medical valve (SJM) was evaluated on Peak and mean pressure gradients and peak flow velocity (p=< 0.05). The St. Jude Medical Hemodynamic Plus valve demonstrated significantly lower peak and mean pressure gradients and peak flow velocity compared to the standard valve of the same size (p < 0.05).
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