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Table 2 Clinical characteristics and cardiac complications in patients with different degree of AVB

From: Pregnancy maternal fetal outcomes among pregnancies complicated with atrioventricular block

Parameters Total n (%) I° AVB
(n=16)
II° AVB (n=25) III° AVB
(n=33)
p-Value
Type I (n=18) Type II (n=7)
NYHA-FC
 I - II 66 (89.2) 16 (100) 16 (88.89) 4 (57.2) 30 (90.91) 0.034**
 III - IV 8 (10.8) 0 2 (11.11) 3 (42.8) 3 (9.09)
Pacemaker implantation
 None 34 (45.95) 16 (100) 16 (88.89) 1 (14.3) 1 (3.03)a <0.001#
 Temporary pacemaker 34 (45.95) 0 2 (11.11) 6 (85.7) 26 (78.79) <0.001
 Permanent pacemaker 6 (8.1) 0 0 0 6 (18.18) 0.068
Left ventricular systolic function
 Normal 73 (98.65) 16 (100) 18 (100) 7 (100) 32 (96.97) 1.000
 Dysfunction 1 (1.35) 0 0 0 1 (3.03)
Valve condition
 Normal 66 (89.2) 14 (87.5) 16 (88.88) 5 (71.4) 31 (93.94) 0.304
 AR 1 (1.35) 0 1 (5.56) 0 0 0.554
 TR 3 (4.05) 0 0 1 (14.3)10 2 (6.06) 0.289
 MR 2 (2.7) 1 (6.25) 0 1 (14.3) 0 0.049
 TR+MR 2 (2.7) 1 (6.25) 1 (5.56) 0 0 0.389
With other arrhythmias
 None 35 (47.30) 11 (68.75) 1 (5.56) 0 23 (69.7) <0.001
 Sinus arrhythmia 13 (17.57) 1 (6.25) 7 (38.89) 3 (42.8) 2 (6.06) 0.003
 Sinus tachycardia 5 (6.76) 1 (6.25) 2 (11.11) 1 (14.3) 1 (3.03) 0.388
 Sinus bradycardia 3 (4.05) 0 1 (5.56) 0 2 (6.06) 1.000
 APB 6 (8.11) 1 (6.25) 5 (27.77) 0 0 0.004
 PVC 8 (10.81) 1 (6.25) 2 (11.11) 2 (28.6) 3 (9.09) 0.458
 APB + PVC 4 (5.40) 1 (6.25) 0 1 (14.3) 2 (6.06) 0.334
With other heart abnormalities
 None 67 (90.54) 15 (93.75) 17 (94.44) 5 (71.4) 30 (90.91) 0.367
 Left atrial enlargement 5 (6.76) 0 1 (5.56) 2 (28.6) 2 (6.06) 0.135
 Pericardial effusion 2 (2.7) 1 (6.25) 0 0 1 (3.03) 0.780
  1. N/n number, AVB Atrioventricular block, NYHA-FC Cardiac function grading (New York Heart Association), AR Aortic regurgitation, MR mitral regurgitation, TR tricuspid regurgitation, APB atrial premature beat, PVC premature ventricular contraction
  2. aOne patient with III° AVB did not install pacemaker before emergency cesarean section due to premature delivery and fetal distress. During the operation, isoproterenol was pumped (1 mg/50ml, 3 ml/h), and then the patient was transferred to cardiology department for pacemaker placement after the operation immediately
  3. ** Comparison of I° AVB and Type II, p=0.020;
  4. # Temporary pacemaker: Comparison of (I° AVB+ Type I) and (Type II +III° AVB), p<0.001; Comparison of I° AVB and III° AVB, p<0.001
  5. ▲With other arrhythmias and none, comparison of III° AVB and II° AVB, p<0.001