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Auto Mode Switch

Auto Mode Switch. Auto Mode Switch. Changes to a non-tracking mode during high atrial rates Programmable Atrial Tachycardia Detection Rate Programmable post-ventricular atrial blanking (PVAB) minimizes inappropriate mode switching due to far-field R-waves. Auto Mode Switch.

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Auto Mode Switch

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  1. Auto Mode Switch

  2. Auto Mode Switch • Changes to a non-tracking mode during high atrial rates • Programmable Atrial Tachycardia Detection Rate • Programmable post-ventricular atrial blanking (PVAB) minimizes inappropriate mode switching due to far-field R-waves

  3. Auto Mode Switch • Adapt Filtered Atrial Rate Interval (FARI) based on P-P intervals • The FARI decreases by 38 ms when P-P interval is shorter than FARI • The FARI increases by 25 ms when P-P interval is longer than FARI • FARI < ATDR interval: Entry Mode Switch • FARI > Maximum Tracking Rate (sensor indicated rate interval): Exit Mode Switch

  4. 265 264 277 Atrium 290 289 278 302 ATDR 314 303 316 315 180 333 354 392 430 468 506 544 PP < FARI: -38 ms 582 620 PP > FARI: +25 ms 658 696 734 772 810 time to mode switch mode switch entry 848 886 924 962 1000 Rate (bpm) Interval (ms) 200 300 FARI < ATDR Interval: mode switch entry 150 400 100 600 50 1200 0 1 2 3 4 5 6 7 8 9 10 Time (sec)

  5. 300 325 350 ATDR 375 180 333 400 425 450 PP < FARI: -38 ms 475 MTR PP > FARI: +25 ms 120 500 500 525 550 time to mode switch mode switch exit Atrium Rate (bpm) Interval (ms) 200 300 150 400 FARI > MTR Interval: mode switch exit 100 600 50 1200 0 1 2 3 4 5 6 7 8 9 10 Time (sec)

  6. Auto Mode Switch Filtered Atrial Rate Interval (FARI) Atrial cycle lengths DDD DDI 670ms 300ms 650ms 630ms 590ms 300ms 300ms 300ms 300ms 600ms 600ms 350ms 300ms 300ms 300ms 300ms +25ms -38ms -38ms +25ms -38ms 0ms -38ms -38ms -38ms -38ms -38ms +25ms +25ms -38ms -38ms -38ms 670ms 670ms 632ms 594ms 518ms 442ms 366ms 277ms 290ms 556ms 480ms 327ms 404ms 328ms 302ms 315ms FARI ATDR: 180bpm  333ms

  7. Auto Mode Switch Base Rate • Auto Mode Switch (AMS ) Base Rate Can Be Programmed To: • Base Rate + 0 ppm. to Base Rate + 35 ppm. • (In Steps of 5 ppm.)

  8. Auto Mode Switch Base Rate

  9. Auto Mode Switch - AMS Base Rate

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