Hydrops is most important prognostic factor – in the context of complete heart block and in the absence of an option to deliver and pace the heart rate it is almost always fatal and consideration to a palliative care pathway should be given Presence of structural heart disease next most important prognostic factor – greater than 80% mortality in presence of atrioventricular block Ectopic related bradycardia usually has a good prognosis, and can be患有低风险心动过速的人受到期待。在存在抗RO/抗LA抗体的情况下,先天性心脏块通常表现在18至28周之间。抗体有时会引起心内膜纤维弹性或更严重的瓣膜疾病或扩张的心肌病。二级心脏阻滞或完全心脏阻滞导致胎儿心动过缓。进展到完整的块可以很快发生,
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