Sustained fetal supraventricular tachycardia that goes untreated is most likely to result in:
Fetal anemia
Hydrops fetalis
The need for a neonatal pacemaker
Comprehensive and Detailed Explanation From Exact Extract–Based NCC C-EFM References:
Sustained fetal supraventricular tachycardia (SVT) often produces heart rates > 200–240 bpm, causing:
Poor ventricular filling
Decreased stroke volume
Reduced cardiac output
Congestive heart failure
Progressive fluid accumulation
NCC and AWHONN emphasize that untreated SVT leads to hydrops fetalis, characterized by:
Ascites
Pleural effusion
Pericardial effusion
Skin edema
Why the other answers are incorrect:
A. Fetal anemia — Causes tachycardia but is not caused by SVT.
C. Neonatal pacemaker — Pacemakers treat heart block, not SVT.
Correct answer: B. Hydrops fetalis
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