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Table 2 Results of electrocardiographic analysis in patients with ankylosing spondylitis (n = 210)

From: Cardiac conduction system abnormalities in ankylosing spondylitis: a cross-sectional study

Heart rate (beats/min) 66 (12)
RR-interval 930 (159)
P-wave duration** 97 (15)
PQ-interval* 164 (27)
QRS-interval** 88 (14)
QRS-interval <100* 153 (73%)
QRS-interval 100-119* 50 (24%)
QRS-interval ≥120* 7 (3.3%)
QTcB-interval** 406 (29)
Atrial fibrillation 2 (1.0%)
AV-block, 1st degree (≥220) 7 (3.3%)
AV-block, 1st degree (≥200) 19 (9%)
AV-block, 2nd degree 0
AV-block, 3rd degree 0
Left anterior fascicular block 12 (6%)
Pacemaker 1 (0.5%)
Any (≥1) conduction abnormality 21 (10%)
with AV-block, 1st degree (≥200) 31 (15%)
  1. * n = 209 (pacemaker patient excluded).
  2. ** n = 207 (pacemaker and atrial fibrillation patients excluded).
  3. Data are presented as mean (SD) or as otherwise stated. All intervals are in ms.