Patients paced (n = 9)

Patients not paced (n = 12)

P Value

Age (years)

75 ± 15

69 ± 22

NS

Male/Female

1-Aug

2-Sep

NS

Baseline heart rate (HR, bpm)

58 ± 20

60 ± 10

NS

Baseline PR (PR, ms)

405 ± 102

337 ± 40

NS

PR > 350 ms

7 (78%)

3 (25%)

< 0.05

Baseline PRc1 (ms)

395 ± 62

335 ± 45

< 0.05

Baseline PRc2 (ms)

385 ± 60

340 ± 45

NS

Peak heart rate (HRmax, bpm)

82 ± 20

117 ± 27

< 0.01

PR at HRmax (PRmin, ms)

320 ± 85

200 ± 40

< 0.05

PRc1 at HRmax ( ms)

370 ± 85

275 ± 40

< 0.05

PRc2 at HRmax (ms)

336 ± 132

218 ± 35

< 0.05

PR index (ms/10 bpm)

40 ± 12

28 ± 12

< 0.05