| 摘要 |
<p>The invention concerns an implantable heart stimulating device (10) comprising, inter alia, a control circuit (14) adapted to enable at least the following: a) delivering electrical stimulating pulses to the two ventricles (RV, LV) of a heart with a variable time interval (ΔT) between the pulses; b) sensing signals receivable from electrodes (31, 32; 41, 42; 51 , 52; 61, 62) positionable at two different positions in the heart, c) deriving an impedance value (Z) based on said sensed signals, d) determining a minimum value (Zmin) and a maximum value (Zmax) of said impedance value (Z) during a heart cycle, e) determining a relationship between said minimum (Zmin) and maximum (Zmax)values, f) varying said time interval (ΔT) and monitoring said relationship over a plurality of heart cycles, g) setting said time interval (ΔT) such that said relationship fulfi1s a predetermined requirement. The invention also concerns a system including such a heart stimulating device (10) as well as a manner of using such a system.</p> |
