RESULTS
Optimal aortic isthmus waveform assessment could be obtained in all cases .Out of 45 cases recruited 2 cases lost to follow up and 5 cases got delivered at other hospital, in these cases aortic isthmus doppler analysis at least 48-72 hours prior to delivery was not available, hence these cases were excluded from the study. Of the total analyzed 38 cases, 25 had antegrade diastolic flow in the aortic isthmus and 13 had retrograde diastolic flow in the aortic isthmus.