Table 2 Measurements before and after MR of the heart
Parameter | FU immediately before (n = 36) | FU in-between (n = 31) | FU immediately after (n = 36) | 3-month FU (n = 36) | 15-month FU (n = 36) | FU immediately before (n = 36) |
|---|---|---|---|---|---|---|
Time from MR (months) | - | - | - | 2.8 ± 0.7 [3.0] | 16.0 ± 3.2 [15.2] | - |
Time from implantation (months) | 5.3 ± 3.8 [4.5] | - | - | 7.9 ± 3.7 [7.6] | 21.2 ± 5.7 [20.7] | - |
RA Sensing (mV) | 2.4 ± 1.3 [2.4] | 2.4 ± 1.5 [2.3] | 2.3 ± 1.5 [2.0] | 2.4 ± 1.3 [2.3] | 2.4 ± 1.5 [2.2] | n.s. |
RA PCT (V@0,4ms) | 0.69 ± 0.22 [0.56] | 0.63 ± 0.19 [0.50]† | 0.62 ± 0.19 [0.50] | 0.69 ± 0.22 [0.50] | 0.64 ± 0.22 [0.50] | n.s. |
RA Pimp (Ohms) | 511 ± 90 [508] | 512 ± 100 [504] | 503 ± 90 [478] | 504 ± 66 [508] | 490 ± 72 [484] | n.s. |
RV Sensing (mV) | 9.8 ± 5.3 [7.5] | 10.9 ± 5.0 [10.9] | 10.3 ± 5.3 [8.9]† | 10.7 ± 4.8 [10.3] | 9.9 ± 5.1 [6.8] | n.s. |
RV PCT (V@0,4ms) | 0.84 ± 0.27 [1.00] | 0.82 ± 0.27 [1.00] | 0.84 ± 0.24 [1.00] | 0.85 ± 0.23 [1.00] | 0.90 ± 0.67 [1.00] | n.s. |
RV Pimp (Ohms) | 508 ± 75 [504] | 516 ± 47 [512]† | 515 ± 62 [500] | 509 ± 84 [494] | 482 ± 58 [488]† | n.s. |
Battery voltage (V) | 3.02 ± 0.03 [3.01] | - | 3.01 ± 0.03 [3.00]† | 3.0 ± 0.02 [3.00]† | 3.00 ± 0.01 [3.00]† | 0.024 |
Value changes (% [median]; compared with pre MRI FU) | ||||||
RA sensing | 5 ± 49 [0] | 4 ± 47 [0] | 8 ± 48 [0] | 8 ± 43 [5] | n.s. | |
RA PCT | -8 ± 17 [0] | -6 ± 28 [0] | 5 ± 40 [0] | -2 ± 38 [0] | n.s. | |
RA Pimp | 1 ± 11 [0] | -1 ± 11 [0] | -0 ± 13 [0] | -3 ± 11 [-6] | n.s. | |
RV sensing | 9 ± 26 [0] | 9 ± 20 [4] | 17 ± 39 [8] | -3 ± 27 [-6] | 0.046 | |
RV PCT | -0 ± 33 [0] | 7 ± 38 [0] | 12 ± 49 [0] | 3 ± 39 [0] | n.s. | |
RV PImp | 3 ± 7 [4] | 2 ± 7 [2] | 1 ± 14 [0] | -4 ± 10 [-4] | 0.015 | |
Battery voltage (V) | - | -0.3 ± 0.3 [-0.2] | -0.4 ± 0.6 [-0.3] | -0.6 ± 0.9 [-0.3] | n.s. | |