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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 switch1
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 switch2
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


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)


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)


Auto mode switch3
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


Auto mode switch base rate
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.)



Auto Mode Switch - AMS Base Rate


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