It is not usual for the fetus to have an irregular heart beat (cardiac arrhthmia) during pregnancy. More often than not it is a benign condition, though it requires further tests when it is observed. There are several different arrhythmias, and most pose no problem to the fetus:
Simple Arrhythmias:
- Premature atrial contraction (PAC)
- Premature ventricular contraction (PVC)
- Sinus tachycardia (ST)
- Sinus bradycardia (SB)
- Premature atrial contraction blocked
Potentially Fatal:
- Atrioventricular block (A-V)
- Supraventricular tachycardia (SVT)
- Atrial flutter (AF)
- Nodal tachycardia
- Complex arrhythmias
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