[Morphological and functional characteristics of the heart in untreated hypertension].

Unlabelled: To better define the different forms of hypertensive heart disease, we performed 2D guided M mode echo recording of the left ventricle (LV) and Doppler assessment of LV filling in 118 newly recognised (less than 1 year) and untreated hypertensive patients (mean age +/- SD: 49 +/- 10 years, 80 males, 38 females). All recordings were read "blindly". 86 patients underwent also 24 hours BP monitoring during daily routine.

Main Results: 1) The relative wall thickness (h/r) shows a normal distribution: mean = 0.39; SD = 0.08; 1st quartile = 0.33; 3rd = 0.43; 2) The septal/posterior wall ratio (ST/PWT) shows also a normal distribution: mean = 1.14; SD = 0.24; 1st quartile = 1; 3rd = 1.3; 3) Among patients with LVH (Devereux's criteria, n = 65) the 6 patients with h/r less than or equal to 0.33 are significantly different from the 18 patients with h/r greater than or equal to 0.43 for age (44 +/- 8 vs 51 +/- 10; p less than 0.03), casual (146 +/- 7 vs 166 +/- 13 mmHg; p less than 0.05) and ambulatory SBP (135 +/- 19 vs 146 +/- 16 mmHg; p less than 0.05), peak systolic stress (280 +/- 15 vs 187 +/- 31 Dynes/cm2; p less than 0.001) and E/A ratio (1.17 +/- 0.01 vs 0.94 +/- 0.27; p less than 0.05) but not for ponderal excess. 4) Patients with asymmetric LVH(ST/PWT greater than 1.3 in 22; greater than 1.5 in 10) are significantly different from patients with symmetric LVH for age (54 +/- 10 vs 47 +/- 10; p less than 0.03), diastolic diameter (51 +/- 5 vs 53 +/- 5 mm; p less than 0.02), ST (13.2 +/- 2.9 vs 10 +/- 1.9 mm; p less than 0.001) and PWT (8.9 +/- 1.5 vs 9.7 +/- 1.5 mm; p less than 0.02) but not for BP fractional shortening and LV filling.

Conclusion: eccentric LVH may be found in young hypertensive patients with normal systolic function and LV filling despite high parietal stress; asymmetric LVH is more frequent in older patients in which LVH seems to develop rather on the septum than on free wall, independently of BP and without consequences on LV function.