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Blood pressure circadian rhythm in essential hypertension
Clinical Science and Molecular Medicine. Supplement
|December 1, 1978
Insights
Ambulatory hypertensive patients exhibit clear daily blood pressure rhythms, peaking mid-morning and lowest during sleep. Oxprenolol effectively lowers daytime blood pressure but shows limited nocturnal efficacy.
Area of Science:
- Cardiology
- Chronobiology
- Pharmacology
Background:
- Ambulatory blood pressure monitoring (ABPM) is crucial for diagnosing and managing hypertension.
- Understanding circadian blood pressure variations is essential for optimizing antihypertensive treatment.
Purpose of the Study:
- To investigate the circadian patterns of systolic and diastolic blood pressure in hypertensive individuals.
- To evaluate the efficacy of daytime oxprenolol administration on 24-hour blood pressure control.
Main Methods:
- Utilized ambulatory blood pressure monitoring (ABPM) in hypertensive subjects.
- Analyzed blood pressure trends across different times of the day and night.
- Assessed the impact of oxprenolol treatment initiated during daytime hours.
Main Results:
- A well-defined circadian variation was observed in both systolic and diastolic blood pressure.
- Blood pressure peaked around 10:00 AM and reached its lowest point at 3:00 AM during sleep.
- Oxprenolol treatment effectively reduced daytime blood pressure but demonstrated diminished efficacy during nighttime and early morning hours.
Conclusions:
- Hypertensive subjects display significant circadian blood pressure fluctuations.
- Daytime administration of oxprenolol provides partial 24-hour blood pressure control, with reduced effectiveness during nocturnal periods.
Abstract:
1. Both systolic and diastolic blood pressure show a well defined circadian variation in ambulatory hypertensive subjects. 2. Blood pressure is highest in the mid-morning (10.00 hours) and lowest during sleep at 03.00 hours. 3. Treatment with oxprenolol (taken during the day) reduces daytime blood pressure but is less effective during the night and early morning.