Related Experiment Videos
Establishing the effect of antihypertensive treatment on coronary morbidity and mortality
1Department of Medicine, Gothenburg University, Ostra Hospital, Sweden.
Insights
Major antihypertensive trials showed significant reductions in stroke incidence but not significantly for coronary heart disease (CHD). Further research is needed to understand treatment effects on CHD, considering factors like treatment duration and metabolic effects.
Area of Science:
- Cardiovascular Medicine
- Clinical Trials
- Hypertension Research
Background:
- Antihypertensive medications are widely used to manage high blood pressure.
- Major clinical trials have evaluated their efficacy in reducing cardiovascular events.
- The impact on coronary heart disease (CHD) and stroke requires detailed analysis.
Purpose of the Study:
- To review and synthesize findings from major antihypertensive trials.
- To assess the impact of blood pressure lowering on coronary heart disease (CHD) and stroke.
- To explore reasons for differential effects on CHD versus stroke.
Main Methods:
- Systematic review and meta-analysis of major antihypertensive clinical trials.
- Examination of pooled data for effects on coronary heart disease (CHD) and stroke incidence.
- Analysis of treatment effects in general population samples and the blood pressure-CHD relationship.
Main Results:
- Most individual trials were underpowered to detect significant differences in CHD incidence.
- Pooled analysis did not yield a significant reduction in CHD incidence.
- Significant reductions in stroke incidence were observed in some trials and in the pooled data.
Conclusions:
- Antihypertensive therapy demonstrates efficacy in reducing stroke incidence.
- The effect on coronary heart disease (CHD) incidence requires further investigation.
- Factors such as treatment duration, effects on other risk factors, and potential counteracting metabolic effects may influence CHD outcomes.
Abstract:
The results of the major antihypertensive trials are reviewed. Most of them were too small to detect significant differences on coronary heart disease (CHD) incidence. The pooled result was not significant for the effect on CHD; for stroke it was significant in some of the individual trials and significant when the data were pooled. The results of treatment in a general population sample and the 'J'-shaped curve relation between achieved blood pressure and CHD incidence are discussed. Reasons for the stronger effect on stroke compared with CHD, may be: A longer treatment period needed to affect CHD. --Effects on other risk factors such as lipid levels and smoking are needed to influence CHD incidence. Negative metabolic effects from treatment may be counteractive. More basic mechanisms in the process leading to hypertension and CHD may have to be affected.