| 摘要 |
<p>The invention relates to a device (1) for detecting hemodynamic conditions in a heart (2), in particular conditions corresponding to dangerous arrhythmias. The device contains a sensing unit (6) for a physiological variable, which is blood pressure, the unit emitting a signal (10), on the basis of the variable, with a mean value, a signal conditioning unit (7) connected to the sensing unit (6), a calculation unit (8) connected to the signal conditioning unit (7) and a comparator (9) after the calculation unit (8). The calculation unit (8) is devised to calculate a variability measure (14) relative to the signal's mean value, the variability measure (14) being correlated to mean blood pressure, and the variability measure (14) is compared in the comparator (9) to an adjustable threshold value (16, 17) corresponding to a specific hemodynamic condition, whereupon the comparator (9) emits an indication signal (18, 19) when the variability measure (14) falls below the threshold value (16, 17). <IMAGE></p> |
