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Table 1 Characteristics of patient and controls and surgical information of patients

From: Increased left ventricular myocardial extracellular volume is associated with longer cardiopulmonary bypass times, biventricular enlargement and reduced exercise tolerance in children after repair of Tetralogy of Fallot

  Patients (n = 31) Controls (n = 15) p
Age at CMR [years] 13.9 ± 2.4 13.4 ± 2.6 0.54
Gender [male; n (%)] 19 (61 %) 7 (44 %) 0.53
BSA [m2] 1.47 ± 0.27 1.55 ± 0.30 0.41
Heart rate [bpm] 73 ± 11 76 ± 11 0.31
Hematocrit 0.44 ± 0.04 0.42 ± 0.04 0.16
QRS-duration [ms]a 123 ± 24 87 ± 8 <0.001
Surgical information
 Patient age at repair [months] 6.3 (3.0–10.7) n.a. n.a.
 Time since repair at CMR [years] 13.2 ± 2.2 n.a. n.a.
 TOF type [n (%)]   n.a. n.a.
  TOF
  TOF with pulmonary atresia
25 (81 %)
6 (19 %)
  
 Type of repair [n (%)]b   n.a. n.a.
  Transannular patch
  Valve sparing procedure or valved conduit
13 (43 %)
17 (57 %)
  
 Bypass time [minutes]c 136 ± 48 n.a. n.a.
 Cross clamp time [minutes]c 67 ± 19 n.a. n.a.
  1. Data are given as mean ± standard deviation, median (and interquartile range), or frequencies, as appropriate
  2. Abbreviations: BSA body surface area, CMR cardiovascular magnetic resonance, n.a. not applicable, TOF Tetralogy of Fallot
  3. aQRS-duration from ECG was available in 26 patients and 11 controls
  4. bType of repair unknown in one patient. One patient had a palliation prior to corrective surgery
  5. cCardiopulmonary bypass and aortic cross clamp times from 23 patients