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a Chapter 19 Doppler Velocimetry and Hypertension 301<br />

tract and left ventricular diastolic diameter. Atrial<br />

and ventricular functions were significantly lower in<br />

the pathological outcome group. The authors concluded<br />

that abnormal placentation has a wide effect<br />

on the whole cardiovascular system.<br />

Screening in the Third Trimester<br />

Few studies addressed the significance of abnormal<br />

waveforms in the uterine artery in the third trimester.<br />

One of these, by Park et al. [81], followed the outcome<br />

in 198 pregnant women with an early diastolic<br />

notch after 28 weeks' gestation, 9.1% of the pregnant<br />

women who were initially screened. Outcome according<br />

to the notch index (NI; early diastolic flow/peak<br />

diastolic flow) was compared in different categories<br />

viz. < 0.7, 0.7 to

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