| Popis: |
In order to evaluate left ventricular diastolic function by means of Doppler echocardiography in borderline and established hypertension, identified by office and ABPM, compared with normotensives, 54 subjects: 15 normotensives, 11 borderlines and 28 nontreated mild to moderate essential hypertensives were studied. Age and weight were similar among groups. Established hypertensives showed higher left ventricular mass index (p0.05), peak velocity of late left ventricular filling (peak A; p0.01), ratio peak A/peak velocity of early ventricular filling, peak E (p0.01), velocity time integral of systolic atrial volume (p0.001), deceleration half time of peak early diastolic inflow velocity (p0.05), left ventricular isovolumic relaxation period (IRP; p0.01) than normotensives and lower Doppler indexes of early diastolic left ventricular filling (p0.01), peak filling rat normalized to mitral stroke volume (PFRn; p0.01) than normotensives. Although borderline hypertensives showed intermediate LVM and Doppler indexes between hypertensives and normotensives only IRP (p0.05) and PFRn (p0.05) were significant different to normotensives. In conclusion, established hypertension leads to abnormalities in left ventricular diastolic function which can be detected by Doppler echocardiography. In borderline hypertension, the left ventricular diastolic abnormalities are predominantly related to the active process of early diastole. Therefore, these indexes may be early markers of left ventricular dysfunction in hypertension. |
