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Differential control of systolic and diastolic blood pressure in blacks with essential hypertension
Olugbenga E Ayodele1, C Olutayo Alebiosu, Babatunde L Salako
1Department of Medicine, College of Health Sciences, Ladoke Akintola University of Technology, Osogbo, Osun State, Nigeria.
Insights
Systolic blood pressure is less controlled than diastolic blood pressure in Nigerian patients with primary hypertension. This finding highlights a potential increased risk for cardiovascular and renal diseases in this population.
Area of Science:
- Cardiology
- Nephrology
- Public Health
Background:
- Systolic blood pressure (SBP) poses a higher risk for cardiovascular and renal diseases compared to diastolic blood pressure (DBP).
- Primary hypertension management requires understanding differential blood pressure control.
Purpose of the Study:
- To assess the differential control of SBP and DBP in Nigerian patients with primary hypertension.
Main Methods:
- Prospective observational study in Abeokuta, Nigeria.
- 185 hypertensive patients (aged 35-85) with prior treatment were assessed over one year.
- Six clinic blood pressure readings were taken for each patient to calculate average SBP and DBP.
Main Results:
- Overall, 31.4% of patients achieved controlled blood pressure.
- DBP control (51.4%) was significantly more frequent than SBP control (35.7%).
- Patients with uncontrolled SBP were significantly older than those with uncontrolled DBP.
Conclusions:
- SBP control is less frequent than DBP control in treated Nigerian hypertensive patients.
- Suboptimal SBP control may elevate the risk of stroke, cardiovascular, and renal complications.
Objective:
The risk of cardiovascular and renal diseases has been shown to be higher for systolic blood pressure than diastolic blood pressure. The aim of this study was to assess the differential control of systolic and diastolic blood pressure in Nigerians with primary hypertension.
Design And Setting:
This was a prospective observational study carried out at the Medical Outpatient Department of the State Hospital, Abeokuta, Nigeria. Ethical approval for the study was obtained from the ethical committee of the hospital.
Methodology:
The study population consisted of 185 consecutive patients (65 males, 120 females), aged 35-85 years with primary hypertension who had been on drugs one- to 25 years prior to the onset of the study. Clinic blood pressure control was assessed during a year period. Six consecutive clinic blood pressure readings were recorded for each patient and the average calculated (systolic blood pressure and diastolic blood pressure separately). Patients were classified into subgroups based on the pattern of blood pressure control.
Results:
Clinic systolic blood pressure and diastolic blood pressure was controlled in 58 patients (31.4%). Systolic blood pressure control was less frequent than diastolic blood pressure control (35.7% versus 51.4%, p<0.05). Patients with uncontrolled systolic blood pressure were significantly older than patients with only uncontrolled diastolic blood pressure (66.7+/-7.4 versus 52.9+/-8.7 years, p<0.001).
Conclusion:
Systolic blood pressure is less frequently controlled than diastolic blood pressure in Nigerians treated for primary hypertension. This may increase the patient's risk of developing stroke, and cardiovascular and renal complications.
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