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Table 1 Patient characteristics and results of electrophysiological study

From: Clinical impact of “pure” empirical catheter ablation of slow-pathway in patients with non-ECG documented clinical on–off tachycardia

  Total (N = 334) peCaSP (N = 63) stCaSP (N = 271) P value (peCaSP vs stCaSP)
Male 91 (27%) 15 (24%) 76 (28%) 0.50
Age (years) 47.5 ± 17.6 41.4 ± 15.7 49.0 ± 17.8 0.0020
Basic EPS
 Dual AV-nodal conduction 314 (94%) 57 (90%) 257 (95%) 0.19
 At least 1 echo-beat 288 (86%) 43 (68%) 245 (90%) < 0.0001
 2 or more echo-beats 191 (57%) 0 (0%) 191 (70%) < 0.0001
 AVNRT induction 146 (44%) 0 (0%) 146 (54%) < 0.0001
 Cycle length of AVNRT (ms) 386 ± 63 n.a. 386 ± 63 n.a.
Metaproterenol administration 145 (43%) 58 (92%) 87 (32%) < 0.0001
 Dual AV-nodal conduction 144/145 (99%) 57/58 (98%) 87/87 (100%) 0.40
  Only after metaproterenol adm. 18/145 (12%) 5/58 (9%) 13/87 (15%) 0.26
 At least 1 echo-beat 135/145 (93%) 50/58 (86%) 85/87 (98%) 0.015
  Only after metaproterenol adm. 36/145 (25%) 12/58 (21%) 24/87 (28%) 0.35
 2 or more echo-beats 44/145 (30%) 0/58 (0%) 44/87 (51%) < 0.0001
  Only after metaproterenol adm. 33/145 (23%) 0/58 (0%) 33/87 (38%) < 0.0001
 AVNRT induction 18/145 (12%) 0/58 (0%) 18/87 (21%) 0.0002
 Cycle length of AVNRT (ms) 379 ± 74 n.a. 379 ± 74 n.a.