| 摘要 |
Methods for determining a cardiovascular parameter reflecting fluid or volume changes and for detecting arrhythmia are disclosed. These methods involve receiving a waveform dataset corresponding to an arterial blood pressure, pulseox, Doppler ultrasound or bioimpedance signal and analyzing the waveform to detect premature ventrical or atrial contractions. Premature ventrical or atrial contractions are detected, for example, by comparing parameters of individual cardiac cycles to the parameters of other or average cardiac cycles. If any premature ventrical or atrial contractions are present, they are removed from the waveform dataset. Once any the premature ventrical or atrial contractions are removed, a cardiovascular parameter reflecting fluid or volume changes using the modified waveform dataset is calculated. In the method for determining arrhythmia, if the number of premature ventrical or atrial contractions exceeds a predetermined arrhythmia threshold, a user such as a medical professional is notified.
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