[Doppler analysis of blood flow of the supratrochlear artery: age specific pattern analysis in healthy and hypertensive patients].

Averaged Doppler blood flow signals of the supratrochlear artery were used to evaluate age-dependent parameters and ratios in 102 patients with essential hypertension as the only risk factor, and in 74 normotensive healthy volunteers. The first and second systolic peak values (A and B), the minimal value in between A and B (K), the value of the incisura (I), the value of the diastolic peak (D), the time interval between the R-peak of the ECG and A (ti), the duration of the systolic rising phase (ts), and the time interval between the R-peak of the ECG and the footpoint of the systolic rising phase (ti-ts) were used as parameters, and (A-K)/A, A/B, and (D-I)/A were used as ratios. The (A-K)/A-ratio and A/B decreased with age and differed significantly between hypertensive patients 41 to 70 years of age and normotensive controls, between ineffectively treated hypertensive patients 31 to 70 years of age and normotensive controls, and between ineffectively treated hypertensive patients with normalized blood pressure under an antihypertensive regimen in the age group 41 to 60 year.

[Hypertension in unilateral (non-vascular) nephrosclerosis: renin activity in the venous kidney blood and effect of nephrectomy].

13 patients (9 females, 4 males) with hypertension and unilateral (non-vascular) small kidney underwent nephrectomy. Before surgery, renin activity (PRA) was measured in renal vein blood before and/or 15 and 30 minutes after intravenous stimulation with 40 mg furosemide. From these PRA values renin rations (PRA affected side/PRA unaffected side) were calculated.

[Are automatic devices suitable for blood pressure determinations?].

Four automatic blood pressure recorders (Bosograph II, Bosch EBM 500, Elag BE 237R, and Physiometrics SR-2) were compared with the random zero sphygmomanometer. Since each of the automatic devices was calibrated for phase IV, diastolic blood pressure values were read off at phase IV and not phase V of Korotkow with the random zero sphygmomanometer. Blood pressure measurements were carried out in 80 patients with hypertension and in 20 normotensive healthy subjects.

Movement aftereffects in the visual cortex.

Transient effects of prolonged stimulation with moving gratings were studied in single units of the cat striate cortex. In most units, differential adaptation aftereffects of opposite directions of motion could be demonstrated. These results correlate with the psychophysical movement aftereffects.