CC BY
32
Since 1999 ISSN 2226-7425
The journal of scientific articles “Health & education millennium” (series Medicine), 2012, tom 14 [1]
Singh R.B., Sharma J. P., Lal Ranjita, Chibisov S.M., Agarval Radzhesh, Shastun S.,
Halberg Hospital and Research Institute, Moradabad, India; Peoples,s Friendship University of Russia, Moscow, Russia.
ETHNIC DIFFERENCES IN AMBULATORY BLOOD PRESSURES.
Background. Ethnic differences in ambulatory blood pressure (ABP) do exist among African Americans compared to people of European origin and Asian Indians. Data on ABP and heart rate (HR) on American Indians and Asian Indians could have made this study even more interesting. Details on diet and lifestyle factors also appear to be important for mapping circadian changes in blood pressure (BP) in populations studied by the BIOCOS group. Circadian changes in BP are synchronized by the daily routine via plasma concentrations of neurotransmitters, released by the pineal, pituitary and adrenal cortices, coordinated by clock genes situated in the brain’s suprachiasmatic nucleus, and at the cellular level Many studies focusing on this issue have relied mostly on single measurements of BP and HR rather than on week-long profiles obtained with an ABPM, interpreted with a view of their time structures (chro-nomes).
Subjects and Methods. Since it is now accepted that ABPM is superior to clinical spotchecks in terms of diagnosis and prognosis. Our study involved 209 subjects (142 men and 67 women) 42.4 ± 18.0 years of age living in Moradabad, India. We used ABP monitors supplied by the ANDAND Co. Ltd, Japan. Dietary data were obtained by 3 day food intakes by questionnaires.
Results. Anticipated relationships were found. Namely, the MESOR of SBP, DBP and HR increased with age (SBP: r= 0.260, P<o.ooi; DBP: r=o.269, P<o.ooi; HR: r=0.242;
P<0.005), as well as with BMI (SBP: r=o.232, P<o.oo5; DBP: r=o.257, P<o.ooi). The MESOR of HR
also decreased with increased activity (F=5.558, P=o.ooi). The MESOR of SBP also decreased slightly with increased activity, yet the relationship is not statistically significant.
Additional relations were uncovered. The SD of DBP increased as a function of BMI (r=o.248, P=o.oo2), whereas he SD of HR slightly decreased with age (r=-o.i77, P=o.oi5). The percentage time DBP was above times pecified reference values was elevated in subjects who reported consuming alcohol (17.2% vs. 7.1% in subjects who did not report consuming alcohol, Student t=2.367, P=o.o2o). Both the MESOR and the circadian double amplitude of both SBP and DBP, as well as the SD of DBP decreased as a function of social class. Of particular importance is the effect of consumption of fruits, vegetables and legumes (FVL) on the MESOR of
HR (r=-o.i92, P=o.oii), Fig. (1). The circadian double amplitude of HR was also found to be higher among Hindus who prayed (u.7 beats/min) as compared to Hindus who did
not pray (8.i beats/min) (Student t=2.i37, P=o.o35).
Conclusions. Immigration of Asian Indians has been shown to influence BP, partly related to effects of urbanization. This study shows that age, BMI, social class and fruit and vegetable intake were significantly associated with blood pressures.
Correspondence.Dr RB Singh Halberg Hospital and Research Institute Civil Lines, Moradabad-io(UP)244ooi India
