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Original ArticleOpen Access
The Smoothness of Blood Pressure Control of Ramipril in Essential Hypertensive Thai Patients Evaluation by 24-Hour Ambulatory Blood Pressure Monitoring
Uchaipichat V 
,
Koanantakul B ,
Suthisisang C
,
Koanantakul B ,
Suthisisang C Objective: Evaluate the efficacy of ramipril 2.5 and 5 mg once daily on the degree and homogeneity of 24-hour
blood pressure reduction in essential hypertensive Thai patients.
Material and Method: Nineteen male subjects, aged 30 to 60 years, with newly diagnosed essential hypertension
were evaluated using the 24-hour ambulatory blood pressure (24-h ABP) measurement.
Results: Twelve subjects responded and/or normalized with ramipril once daily, where the office and 24-h ABP
were decreased significantly from baseline (p < 0.01). The percentage and magnitude of 24-h SBP/DBP loads
after treatment were significantly decreased from 92 + 9.7/91 + 15.9 to 67 + 23.8/65 + 27.6 (p < 0.01) and
from 23 + 10.6/16 + 5.3 mmHg to 17 + 10.3/10 + 4.8 mmHg (p < 0.05). Trough to peak ratio for SBP/DBP was
0.59/0.52 (overall estimated) and 0.68 + 0.23/0.52 + 0.22 (individual estimated), while the smoothness index
was 0.89/1.03.
Conclusion: Ramipril 2.5 and 5 mg once daily exerted the smooth 24-hour blood pressure reduction in
essential hypertensive Thai patients.
Keywords: Hypertension, Blood pressure variability, Angiotensin converting enzyme inhibitor
blood pressure reduction in essential hypertensive Thai patients.
Material and Method: Nineteen male subjects, aged 30 to 60 years, with newly diagnosed essential hypertension
were evaluated using the 24-hour ambulatory blood pressure (24-h ABP) measurement.
Results: Twelve subjects responded and/or normalized with ramipril once daily, where the office and 24-h ABP
were decreased significantly from baseline (p < 0.01). The percentage and magnitude of 24-h SBP/DBP loads
after treatment were significantly decreased from 92 + 9.7/91 + 15.9 to 67 + 23.8/65 + 27.6 (p < 0.01) and
from 23 + 10.6/16 + 5.3 mmHg to 17 + 10.3/10 + 4.8 mmHg (p < 0.05). Trough to peak ratio for SBP/DBP was
0.59/0.52 (overall estimated) and 0.68 + 0.23/0.52 + 0.22 (individual estimated), while the smoothness index
was 0.89/1.03.
Conclusion: Ramipril 2.5 and 5 mg once daily exerted the smooth 24-hour blood pressure reduction in
essential hypertensive Thai patients.
Keywords: Hypertension, Blood pressure variability, Angiotensin converting enzyme inhibitor
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