Abstract:
The study was done in Karbala city in Iraq in a private clinic of ultrasound and 3 samples of patients were taken their ages 50-70 years. 50 patients uncontrolled hypertensive group (A) , 50 patients of controlled hypertension group (B) , and 50 patients who are normotensive group (C).
The abdomen was scanned to exclude any gross abnormalities in the kidneys such as large cysts or masses which probably have an effect on the study.
With Doppler study of the interlobar renal arteries to see the flow and the resistive index we have found:
There is an obvious difference in the resistive index between group A the hypertensive and those who are normotensive and controlled patient group B & C There is no significant difference between group B and C probably this indicating of the benefit of the treatment.
In group -A- :
The resistive index increased proportionally with the systolic BP and Pulse pressure where it raised from 0.679 to 0.76 when the systolic pressure raised to more than 180mmHg and to 0.833 when the Pulse pressure raised more than 100 mmHg.
The resistive index is increased with the age from 0.697 in the 5th decade to 0.769 in the 7th decade
The resistive index is increased with the duration of the hypertension it raised from 0.707 in patient who are hypertensive for less than 3 years to 0.746 in patients who are hypertensive for more than 10 years.
The resistive index is increased with the decrement of the cortical thickness.
There is no significant difference in the resistive index between male and females in all 3 groups. In group C in female it is 0.649 in male it is 0.644 in group B in female it is 688 in males it is 681 . in group A in female it is 0.719 in males it is 0.705
The resistive index in not correlated well with the diastolic BP as shown by the following table.
Diastolic < 100 mm Hg RI 0.71
Distolic 100 – 110 mm Hg RI 0.74
Diastolic > 110 mm Hg IR 0. 684
This study give as an idea about the intrarenal resistive index in healthy population and hypertensive patients in Iraqi community and shows that RI where it is raised in hypertensive patients they should be followed and try to do more biochemical investigations of the renal function to look for any renal damage.there is many studies including the RI with the biochemical investigation and they found that RI more than 0.80 probably indicating renal dysfunction and may end into renal failure if the hypertension is not controlled.