-transparent.png){kind=logo}
In 63 St. Jude bileaflet and 34 Bjoerk-Shiley tilting disk aortic valve prostheses, Doppler continuity areas were compared to their corresponding geometric areas defined by the opening angle of the occluders. Continuity areas correlated significantly with geometric areas in Bjoerk-Shiley (p = 0.68) and St. Jude prostheses (p = 0.86). Differences between continuity and geometric areas were greater in St. Jude than in Bjoerk-Shiley valves (0.87 +/- 0.45 cm2 vs. 0.06 +/- 0.47 cm2, p < 0.0001). Exclusion of patients with atrial fibrillation, with a postoperative interval of less than 1 year or valve sizes of 19 and 21 mm did not change the results. Thus, underestimation of geometric areas is present in the St. Jude bileaflet aortic valves, while geometric and continuity areas are not significantly different in Bjoerk-Shiley prostheses. These results are attributable to the effect of valve-type-dependent velocity profiles.
K H Henneke, and
G Pongratz, and
M Pohlmann, and
K Bachmann
October 1992,
International journal of cardiology,
K H Henneke, and
G Pongratz, and
M Pohlmann, and
K Bachmann
July 1991,
Zeitschrift fur Kardiologie,
K H Henneke, and
G Pongratz, and
M Pohlmann, and
K Bachmann
December 1986,
Herz,
K H Henneke, and
G Pongratz, and
M Pohlmann, and
K Bachmann
October 1987,
Wiener klinische Wochenschrift,
K H Henneke, and
G Pongratz, and
M Pohlmann, and
K Bachmann
September 1993,
Minerva cardioangiologica,
K H Henneke, and
G Pongratz, and
M Pohlmann, and
K Bachmann
March 1988,
International journal of cardiology,
K H Henneke, and
G Pongratz, and
M Pohlmann, and
K Bachmann
August 1996,
American heart journal,
K H Henneke, and
G Pongratz, and
M Pohlmann, and
K Bachmann
October 2000,
Echocardiography (Mount Kisco, N.Y.),
K H Henneke, and
G Pongratz, and
M Pohlmann, and
K Bachmann
February 1988,
Australian and New Zealand journal of medicine,
K H Henneke, and
G Pongratz, and
M Pohlmann, and
K Bachmann
September 2005,
Acta anaesthesiologica Scandinavica,
