The list below describes the parameters calculated by the analysis module either in real-time or during subsequent analysis.

Name | | Definition |

Num | | The number of the cardiac cycle. |

Sys | The systolic pressure is the maximum pressure that occurs during the cardiac cycle. | |

LVEDP | The left ventricular end diastolic pressure is the pressure at the last zero crossing of the differentiated pressure during the rise to the systolic period. | |

EMw | | Electromechanical Window represents the time difference in milliseconds between the end of electrical systole (end of the T wave) and the end of ventricular relaxation. It is a potential biomarker for Torsades de Pointes (TdP) risk that has greater predicability than using QT prolongation. |

Min | The minimum pressure during the cardiac cycle. | |

TTI | Tension-Time Index is the area under the left ventricular pressure during the ejection phase of the contraction. This is the integration between the LVEDP point and -dP/dtMAX. | |

DP | Developed pressure is the difference between the systolic pressure and the left ventricular end diastolic pressure (SYS-LVEDP). | |

HR | The heart rate is computed in beats-per-minute. It is calculated by taking the reciprocal of the time interval for the cardiac cycle multiplied by 60. | |

+dP/dt | +dP/dt is the maximum positive value of the first derivative of the pressure that occurs during the cardiac cycle. | |

-dP/dt | -dP/dt is the maximum negative value of the first derivative of the pressure that occurs during the cardiac cycle. | |

CI | Contractility index is +dP/dt divided by the pressure at that point. | |

RT1, RT2 | The Relaxation Time is the time period from -dP/dt to the time specified by the Relaxation Time attribute. The time is reported in milliseconds. | |

dP (A, B, C, and D) | These parameters report the value of dP/dt at the pressure levels specified in dP/dt A, dP/dt B, dP/dt C, and dP/dt D (in the attributes window). | |

NPMN | The non-pulsatile mean pressure reported for a logging period. This parameter is still reported even if no pulse pressure exists. | |

Q-A | The Q-A Interval is the time in milliseconds from the start of the Q-wave, in the ECG trigger channel, to the start of the systolic pressure rise (LVEDP). | |

IVT | The time in milliseconds from the start of the systolic pressure rise (LVEDP) to the maximum slope of the systolic pressure rise (+dP/dt). | |

TTI-T | LVEDP to -dP/dt. The time is in milliseconds. | |

Tau | Tau is the time constant isovolumic left ventricular pressure decay. It is reported in milliseconds, and can be defined using Pressure, Developed Pressure and dP/dt. | |

Period | The duration of the current cycle time, in milliseconds. | |

Count | | Reports the number of cycles in a given logging period. |