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- W4239978908 abstract "To the Editor: In response, I can only reemphasize the conclusions that we reported. Our findings clearly demonstrate that, at the end of hypernea, peak left ventricular outflow velocity was increased as compared to that measured at end apnea. Reciprocal changes in mitral valve flow velocities were also noted. The beauty about measuring Doppler indices is that every beat throughout apnea and hypernea can be measured and that each patient serves as his own control. The fact that nine patients with severe class IV congestive heart failure and one patient with a cerebrovascular accident and normal left ventricular function all demonstrated identical findings is further conclusive proof that the Doppler findings are extremely accurate and reproducible. We cannot explain the discrepant hemodynamic measurements obtained in the one patient reported in the present letter which contradicts our findings, except to say that hemodynamic measurements may lag behind changes in the respiratory cycle during CSB. We do agree with the author that further evaluation of the precise hemodynamic changes associated with CSB requires further investigation." @default.
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- W4239978908 date "1990-03-01" @default.
- W4239978908 modified "2023-09-30" @default.
- W4239978908 title "Doppler Evaluation" @default.
- W4239978908 doi "https://doi.org/10.1378/chest.97.3.765-b" @default.
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