PMC5735614_01
Normal electrical PR (ePR) interval on surface ECG as a guide.
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fig1
An anomaly scan at 20 weeks was unremarkable and a fetal echocardiogram confirmed a structurally normal heart with a normal PR interval (see Figures 1 and 2).
Normal mechanical PR interval (mPR) 10 days earlier in our case; fetal cardiac Doppler sampling the mitral inflow to aortic outflow.
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fig2
An anomaly scan at 20 weeks was unremarkable and a fetal echocardiogram confirmed a structurally normal heart with a normal PR interval (see Figures 1 and 2).
Complete heart block.
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fig3
Unfortunately 10 days later a repeat scan confirmed complete heart block, with a ventricular rate of 65 bpm (see Figure 3).
(Umbilical artery Doppler. Good EDF, PI 0.83).
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fig4
Umbilical artery Doppler showed good end diastolic flow and a pulsatility index of 0.83 (Figure 4).
(No atrioventricular regurgitation. No cardiomegaly).
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fig5
Cardiac function, CVP score (see discussion), was maintained throughout (Figures 5 and 6), with a ventricular rate between 65 and 75 bpm.
Preserved ventricular contractility (indicated by Fractional Shortening of 52%).
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fig6
Cardiac function, CVP score (see discussion), was maintained throughout (Figures 5 and 6), with a ventricular rate between 65 and 75 bpm.