| 摘要 |
A pressure-sensitive device contacts the skin of a patient near an artery noninvasively to provide a signal representative of systemic arterial blood pressure both before and after a Valsalva Manoeuvre. This blood pressure signal is differentiated, and the changes in amplitude before and during the Valsalva Manoeuvre detected to indicate potential left ventricle failure when the change is to less than a predetermined value. Signals representative of pulse pressure, the mean systemic arterial blood pressure, heart rate and left ventricular ejection time are also provided to facilitate detection of impaired mechanical performance of the heart.
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