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Does change in blood pressure predict heart disease?
Insights
Investigating blood pressure changes and cardiovascular disease risk revealed that past blood pressure trends are less critical than current levels. Focus on present blood pressure for clinical decisions regarding hypertension treatment.
Area of Science:
- Cardiology
- Epidemiology
- Preventive Medicine
Background:
- Cardiovascular disease (CVD) remains a leading cause of mortality worldwide.
- Understanding risk factors beyond static measurements, such as blood pressure trends, is crucial for effective prevention.
- The Framingham Heart Study provides long-term data for investigating complex cardiovascular health relationships.
Purpose of the Study:
- To determine if blood pressure change over time is an independent predictor of cardiovascular disease risk.
- To assess the association between blood pressure trends and incident cardiovascular disease, considering baseline and follow-up blood pressure levels.
Main Methods:
- Utilized data from 5209 subjects in the Framingham Heart Study.
- Analyzed a 26-year follow-up period, dividing it into a 12-year blood pressure change assessment and a subsequent 14-year CVD risk evaluation.
- Employed statistical methods to examine the relationship between blood pressure change and cardiovascular disease occurrence.
Main Results:
- A positive association was observed between blood pressure change and the risk of cardiovascular disease.
- This association persisted when accounting for initial blood pressure levels.
- However, the link between blood pressure change and CVD risk disappeared when considering blood pressure levels after the initial 12-year period.
Conclusions:
- The long-term trend of blood pressure change is not an independent predictor of cardiovascular disease risk.
- Current blood pressure levels are more critical for assessing cardiovascular disease risk than past trends.
- Clinical decisions regarding hypertension treatment should prioritize the patient's current blood pressure measurement.
Abstract:
Whether a change in blood pressure is related to the occurrence of cardiovascular disease, independent of blood pressure level, was investigated using data collected in the Framingham heart study on 5209 subjects. The follow up period of 26 years was divided into a first period of 12 years in which the blood pressure change was computed for each individual and a subsequent period of 14 years in which the risk of cardiovascular disease was determined. Blood pressure change was positively related to risk of cardiovascular disease. This association remained when blood pressure level at the start of the study was taken into account but disappeared when the level attained after the first 12 years was taken into consideration. For the clinician this suggests that the decision to treat high blood pressure is best guided by the actual level of pressure and not by its long term trend in the past.