Clinical and experimental studies of the relationship between phasic mitral flow and mitral valve echogram: echocardiographic evaluation of annuloplasty for mitral regurgitation
Ishihara, H.
Nihon Geka Hokan. Archiv für Japanische Chirurgie 50(5): 649-668
1981
ISSN/ISBN: 0003-9152 PMID: 7332398 Document Number: 177631
Echocardiographically recorded mitral valve motion was compared with phasic transmitral flow in 20 open chest dogs with normal valves and after annuloplasty and MR . After annuloplasty both C-E amplitude and E-F slope tended to decrease and then to increase after the production of MR. E-F slope changed more than C-E amplitude. E-F slope changes correlated well with mitral flow. E-F slope did not necessarily reflect the MR ratio. The corrected E-F slope, derived by modifying the E-F slope by the cardiac output, varied in a close positive linear relationship with the MR ratio. In acute MR, the E-F slope showed a close relationship with the LAv wave. C-E amplitude did not reflect the hemodynamic state more faithfully than the corrected E-F slope. Nine patients treated with mitral reconstructive surgery because of MR due to ruptured chordae tendinae were studied clinically. Both E-F slope and corrected E-F slope did not decrease postoperatively in patients with residual MR, but the change in the corrected E-F slope was more significant than in the uncorrected E-F slope. It is useful to follow patients with MR with no organic lesion of their valves by their E-F slope and corrected E-F slope postoperatively.