For other outcomes analysed ( major vascular events , death from all causes , death from cardiovascular causes ) , we observed no significant differences between the groups .
There were minor blood pressure reductions in the intervention group .
To date , no available evidence supports the routine use of beta-blockers for secondary prevention after stroke or TIA .
BACKGROUND Stroke affects 15 million people per year worldwide .
Despite recent developments in acute stroke treatment , prevention remains very important .
Stroke has a high rate of recurrence ; therefore secondary prevention is also important .
Many clinical approaches to control risk factors have been proposed .
One of these approaches is the prescription of beta-blockers that have effects beyond the reduction of blood pressure , which can reduce the recurrence of stroke .
OBJECTIVES To evaluate the efficacy of beta-blockers for preventing stroke recurrence and for reducing death and major vascular events in people with a previous stroke or transient ischaemic attack ( TIA ) , and to determine their safety , particularly with regard to the development of diabetes mellitus .
Blood pressure, stroke, and coronary heart disease: Part 1, prolonged differences in blood pressure: prospective observational studies corrected for the regression dilution bias
The associations of  diastolic blood pressure ( DBP )  with  stroke  and with coronary heart disease ( CHD ) were investigated in nine major prospect i ve observational studies : total 420,000 individuals , 843 strokes , and 4856 CHD events , 6 - 25 ( mean 10 ) years of follow-up . The combined results demonstrate positive , continuous , and apparently independent associations , with no significant heterogeneity of effect among different studies . Within the range of DBP studied ( about 70 - 110 mm Hg ) , there was no evidence of any " threshold " below which lower levels of DBP were not associated with lower risks of stroke and of CHD . Previous analyses have described the uncorrected associations of DBP measured just at " baseline " with subsequent disease rates . But , because of the diluting effects of r and om fluctuations in DBP , these substantially underestimate the true associations of the usual DBP ( ie , an individual 's long-term average DBP ) with disease . After correction for this " regression dilution " bias , prolonged differences in usual DBP of 5 , 7.5 , and 10 mm Hg were respectively associated with at least 34 % , 46 % , and 56 % less stroke and at least 21 % , 29 % , and 37 % less CHD . These associations are about 60 % greater than in previous uncorrected analyses . ( This regression dilution bias is quite general , so analogous corrections to the relations of cholesterol to CHD or of various other risk factors to CHD or to other diseases would likewise increase their estimated strengths . ) The DBP results suggest that for the large majority of individuals , whether conventionally " hypertensive " or " normotensive " , a lower blood pressure should eventually confer a lower risk of vascular disease
For other outcomes analysed ( major vascular events , death from all causes , death from cardiovascular causes ) , we observed no significant differences between the groups .
There were minor blood pressure reductions in the intervention group .
To date , no available evidence supports the routine use of beta-blockers for secondary prevention after stroke or TIA .
BACKGROUND Stroke affects 15 million people per year worldwide .
Despite recent developments in acute stroke treatment , prevention remains very important .
Stroke has a high rate of recurrence ; therefore secondary prevention is also important .
Many clinical approaches to control risk factors have been proposed .
One of these approaches is the prescription of beta-blockers that have effects beyond the reduction of blood pressure , which can reduce the recurrence of stroke .
OBJECTIVES To evaluate the efficacy of beta-blockers for preventing stroke recurrence and for reducing death and major vascular events in people with a previous stroke or transient ischaemic attack ( TIA ) , and to determine their safety , particularly with regard to the development of diabetes mellitus .