| 摘要 |
Stimulator means (21, 22; 31, 32; 71, 72) can generate electrical stimulation pulses at at least one first intensity level (21, 22; 31, 32) and at least one second intensity level (71, 72). The first and second intensity levels are above and below a given stimulation threshold, respectively. The synchronous or asynchronous delivery of second-level pulses enables the conduction of the atrioventricular node to be modulated by electrotonic effect, for example, to reduce ventricular frequency in the event of atrial fibrillation. <IMAGE> |
