Mv. Pitzalis et al., Influence of gender and family history of hypertension an autonomic control of heart rate, diastolic function and brain natriuretic peptide, J HYPERTENS, 19(1), 2001, pp. 143-148
Citations number
29
Categorie Soggetti
Cardiovascular & Respiratory Systems","Cardiovascular & Hematology Research
Objective To verify in a unitary view whether autonomic control of heart ra
te and cardiac structure and function are modified early in offspring of hy
pertensive families.
Methods and results We selected 87 age- and sex-matched young normotensive
subjects with (n = 45) and without (n = 42) a family history of hypertensio
n who underwent evaluations of arterial pressure, time-domain parameters of
autonomic heart rate control (24-h ECG monitoring), spectral baroreflex se
nsitivity, left ventricular geometry and function (echo-Doppler) and plasma
brain natriuretic peptide levels (BNP), The group with a family history of
hypertension significantly differed from their counterparts for systolic p
ressure (119 +/- 11 versus 114 +/- 9 mmHg, P < 0.05), heart rate (RR interv
al, 766 +/- 64 versus 810 +/- 93 ms, P < 0.05), heart rate variability [the
standard deviation of normal RR intervals (SDNN), 147 +/- 29 versus 171 +/
- 33 ms, P < 0.05], diastolic function (isovolumetric relaxation time, 65 /- 9 versus 60 +/- 8 ms, P < 0.05) and BNP (23 +/- 13 versus 37 +/- 10 pg/m
l, P < 0.05). Baroreflex sensitivity values did not differ between the two
groups, When gender was considered, all the above-mentioned measures, as we
ll as baroreflex sensitivity, were significantly different between males wi
th and without a family history of hypertension but not between females, ex
cept for BNP, which was lower in males and females with a history of hypert
ension (males, 24 +/- 11 versus 38 +/- 8 pg/ml, P < 0.01; females 21 +/- 14
versus 36 +/- 13 pg/ml, P < 0.05).
Conclusions Male, but not female, hypertensive offspring have modified dias
tolic function and autonomic control of heart rate; BNP is the only paramet
er able to characterize hypertensive offspring independently from the influ
ence of gender, This provides the hypothesis that the impaired production o
f this hormone could play a primary role in the pre-hypertensive state. (C)
2001 Lippincott Williams & Wilkins.