Parameter/Index | MAO^{+} Group (n = 35) | MAO^{−} Group (n = 20) | Intergroup Significance |
---|---|---|---|

E′, cm/s | 17.5 (3.1) | 13.5 (3.9) | P < 0.00001 |

AT′, ms | 65 (12) | 54 (11) | P < 0.01 |

DT′, ms | 79 (17) | 67 (20) | P < 0.05 |

VTI_{E′}, mm | 12.7 (3.5) | 8.3 (3.7) | P < 0.0001 |

VTI_{E′} − VTI_{E″}, mm^{*} | 10.4 (3.6) | 8.3 (3.7) | P < 0.05 |

A′, cm/s | 16.3 (3.6) | 15.5 (3.5) | P = 0.42 |

VTI_{A′}, mm | 7.3 (2.3) | 8.6 (3.0) | P = 0.06 |

E′/A′ | 1.11 (0.28) | 0.91 (0.35) | P < 0.05 |

E/E′ | 4.16 (1.15) | 5.18 (1.80) | P < 0.05 |

c′, g/s | 18.3 (5.9) | 48.6 (7.7) | P < 0.00001 |

k′, g/s^{1} | 490 (120) | 594 (233) | P < 0.05 |

x′_{o}, cm | 1.16 (0.32) | 0.85 (0.45) | P < 0.01 |

k′x′_{o}, dyn | 547 (153) | 460 (149) | P < 0.05 |

k′x_{o}^{′2}, erg | 337 (164) | 217 (147) | P < 0.01 |

β′, s^{−2}^{†} | −1,787 (489) | 0 (0) | P < 0.00001 |

Values are means (SD). E′ and A′, peak amplitude of E′ and A′ wave, respectively; AT′ and DT′, acceleration and deceleration time of E′ wave, respectively; VTI

_{E′}and VTI_{E″}, velocity-time integral of E′ and E″ wave, respectively; VTI_{A′}, velocity-time integral of A′ wave; E, peak amplitude of E wave;*c*′, longitudinal damping constant;*k*′, longitudinal spring constant; (*x*′_{o}), initial longitudinal displacement of spring before release; β′, effect of longitudinal stiffness vs. relaxation.↵* E″ waves were absent in subjects without annular oscillations.

↵† β′ was computed for the MAO

^{−}subjects by assuming critical damping as discussed in methods. Bold type indicates significance.