Table 3

Incidence of arrhythmia by type for women with and without congenital heart disease*

CHD + (SEM)CHD − (SEM)Univariate OR (95% CI)Multivariable OR (95% CI)
Any arrhythmia2637 (227)210 (3.7)12.9 (10.9 to 15.3)10.9 (9.2 to 12.9)
Supraventricular
 Any supraventricular2073 (195)165.2 (0.1)12.8 (10.6 to 15.5)10.8 (9.0 to 13.0)
 Paroxysmal SVT279.9 (64.7)16.4 (0.6)17.2 (10.9 to 27.2)15.4 (9.7 to 24.4)
 Unspecified supraventricular1205 (145)132.6 (2.6)9.2 (7.3 to 11.6)7.7 (6.1 to 9.7)
 Atrial fibrillation400.9 (82.7)14.5 (0.5)27.8 (18.4 to 41.9)23.2 (15.3 to 35)
 Atrial flutter198.8 (56.1)1.9 (0.2)103.0 (57.3 to 184.9)85.3 (47.3 to 154)
 Sinus node dysfunction130.1 (50.2)1.8 (0.2)73.0 (33.4 to 59.7)57.7 (25.9 to 128.5)
Ventricular
 Any ventricular362.8 (79.4)12.6 (0.5)28.8 (18.6 to 44.5)20.8 (13.3 to 32.5)
 Paroxysmal VT261.7 (63)7.0 (0.3)37.5 (23 to 61)29.2 (17.9 to 47.8)
 Ventricular fibrillation/arrest101.1 (41.1)6.0 (0.3)16.8 (7.7 to 37)11.1 (5 to 24.5)
Unspecified/premature beats
 Unspecified arrhythmia80.2 (35.9)9.9 (0.4)9.1 (3.4 to 19.2)7.0 (3.0 to 16.6)
 Premature beats231.5 (64.5)26.2 (0.8)8.8 (5.1 to 15.3)7.6 (4.4 to 13.2)
  • * Data are for women having childbirth during hospitalisation. The analysis used sampling weights to produce nationally representative estimates and accounted for the complex survey design.

  • The multivariable model included age in years, number of Elixhauser comorbidities, year of hospitalisation, hospital teaching status and method of delivery (caesarean section or vaginal delivery).

  • Rates are presented as events per 100 000 deliveries. The number of individual events does not add to the overall arrhythmia value because of multiple coded arrhythmias per patient.

  • SVT, supraventricular tachycardia. VT, ventricular tachycardia. Supraventricular arrhythmia included paroxysmal SVT (ICD-9 427.0), unspecified SVT (ICD-9 427.89), atrial fibrillation (ICD-9 427.31), atrial flutter (ICD-9 427.32) and sinus node dysfunction (ICD-9 427.81). Ventricular arrhythmia included paroxysmal VT (ICD-9 427.1), ventricular fibrillation/flutter (ICD-9 427.4) and cardiac arrest (ICD-9 427.5). Other arrhythmias included premature beats inclusive of atrial, ventricular and unspecified premature beats (ICD-9 427.6) and unspecified arrhythmia (ICD-9 427.2, 427.9).