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Ambulatory blood pressure in hypertension with particular reference to the kidney
G Mancia1, L Ulian, C Santucciu
1Cattedra di Medicina Interna Università di Milano and Ospedale S. Gerardo Monza, Italy.
Insights
Ambulatory blood pressure monitoring (ABPM) better predicts hypertension-related organ damage than clinic readings. Blood pressure variability from ABPM shows independent correlation with this damage, offering a promising diagnostic index.
Area of Science:
- Cardiology
- Nephrology
- Hypertension Research
Background:
- Clinic blood pressure measurements may not fully represent a patient's typical blood pressure status.
- Hypertension leads to significant end-organ damage, including left ventricular hypertrophy and renal involvement.
- Existing methods for assessing hypertension's impact may lack precision in predicting organ damage.
Purpose of the Study:
- To compare the association of ambulatory blood pressure with end-organ damage versus clinic blood pressure.
- To evaluate the predictive value of different ambulatory blood pressure parameters, including variability, for hypertension-related organ damage.
Main Methods:
- Utilized ambulatory blood pressure monitoring (ABPM) to record blood pressure over a 24-hour period.
- Assessed end-organ damage using indicators like left ventricular hypertrophy and microalbuminuria.
- Analyzed correlations between various ABPM metrics (24-hour, daytime, nighttime averages, and variability) and organ damage indices.
Main Results:
- Ambulatory blood pressure demonstrated a stronger correlation with end-organ damage than clinic blood pressure.
- Both 24-hour and daytime/nighttime average ambulatory blood pressure showed close correlations with organ damage.
- Blood pressure variability emerged as a potentially independent predictor of hypertension-induced end-organ damage.
Conclusions:
- Ambulatory blood pressure monitoring is a superior tool for assessing hypertension's risk for end-organ damage.
- Blood pressure variability is a significant, potentially independent, factor associated with hypertensive organ damage.
- Further research into blood pressure variability may refine hypertension management and risk stratification.
Abstract:
Ambulatory blood pressure is more closely related to the end organ damage of hypertension than clinic blood pressure is. This is the case not only for left ventricular hypertrophy, but also for an index of renal involvement such as microalbuminuria. The closer correlation of ambulatory blood pressure with end organ damage characterises not only the 24 hour average value but also, to a similar extent, day-time and night-time average blood pressure, while the clinical importance of the difference between day and night blood pressure is still a matter of controversy. A more promising index derived from ambulatory blood pressure recordings seems to be blood pressure variability, which in preliminary studies has been shown to display an independent correlation with the end organ damage of hypertension.