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Bradyarrhythmia
Definition |
Persistently slow heart rate <100 beats per minute |
| Incidence | Dependent on cause (see below). Non structural overall incidence Congenital Heart Block (CHB) 1:20000 |
| Diagnosis | Ultrasound & CTG |
| Gestation at diagnosis | 12-40 weeks |
| Known cause, chromosomal or genetic association | Strong association with maternal Rho positive lupus. Also strong association with cardiac malformation (50%) |
| Further investigations | Fetal Echocardiogram |
| Differential Diaganosis | Transient sinus bradycardia (physiological) |
| Prognosis | Dependant on gestations and cause. If early trimester poor. If associated with structural problem very poor. If associated with anti-Ro/LA antibodies good (~90%) |
| Recurrance risk | If the result of anti-Ro/LA 8-16%, if structural defect low |
| Research Studies | None |
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