Table 1.
TS < 2.5 ms n = 54 | TS > 2.5 ms n = 142 | P | |
---|---|---|---|
Age (years) | 60.6 ± 6.1 | 57.0 ± 7.4 | 0.001 |
Systolic RR | 137 ± 17 | 134 ± 17 | n.s. |
(mmHg) | |||
Diastolic RR | 86 ± 11 | 83 ± 10 | n.s. |
(mmHg) | |||
K (mmol/dL) | 4.1 ± 0.4 | 4.2 ± 0.4 | n.s. |
EF (%) | 49.2 ± 1.0 | 50.3 ± 1.1 | n.s. |
LVEDD (mm) | 56.5 ± 8.8 | 55.5 ± 7.3 | n.s. |
LVESD (mm) | 42.9 ± 8.4 | 40.7 ± 7.5 | n.s. |
Heart rate (ms) | 867 ± 151 | 941 ± 131 | 0.001 |
PVC cycle | 555 ± 84 | 559 ± 92 | n.s. |
length (ms) | |||
Post PVC (ms) | 1165 ± 239 | 1256 ± 211 | n.s. |
QT (ms) | 384 ± 38 | 395 ± 36 | n.s. |
QTdis (ms) | 89 ± 34 | 91 ± 39 | n.s. |
SDNN (ms) | 40.7 ± 15.7 | 59.9 ± 25.0 | 0.01 |
RMSSD (ms) | 25 ± 15 | 42 ± 38 | 0.01 |
PNN50 (%) | 2.8 ± 5.2 | 11.5 ± 14.8 | 0.001 |
EF: ejection fraction; LVEDD: left ventricular end‐diastolic diameter; LVESD: left ventricular end‐systolic diameter; PVC cycle length: coupling interval of the ventricular extrasystole; Post PVC: cycle length after the PVC; QT: QT interval; QTdis: QT interval dispersion; SDNN: standard deviation of the RR‐intervals; RMSSD: root mean square of the standard deviation; PNN 50: percent of intervals outside 50 ms of the mean; P value < 0.05 is considered as significant.