However , lack of data specifically examining outcomes in PAD patients should not detract from the overwhelming evidence on the benefit of treating hypertension and lowering blood pressure
BACKGROUND Peripheral arterial disease ( PAD ) causes considerable morbidity and mortality .
Hypertension is a risk factor for PAD .
Treatment for hypertension must be compatible with the symptoms of PAD .
Controversy regarding the effects of beta-adrenoreceptor blockade for hypertension in patients with PAD has led many physicians to stop prescribing beta-adrenoreceptor blockers .
Little is known about the effects of other classes of anti-hypertensive drugs in the presence of PAD .
This is the second up date of a Cochrane review first published in 2003 .
OBJECTIVES To determine the effects of anti-hypertensive drugs in patients with both raised blood pressure and symptomatic PAD in terms of the rate of cardiovascular events and death , symptoms of claudication and critical leg ischaemia , and progression of atherosclerotic PAD as measured by ankle brachial index ( ABI ) changes and the need for revascularisation ( reconstructive surgery or angioplasty ) or amputation .
Study population and treatment titration in the International Nifedipine GITS Study: Intervention as a Goal in Hypertension Treatment (INSIGHT).
OBJECTIVES To ascertain the baseline characteristics of the high-risk hypertensive patients entering the International Nifedipine GITS Study : Intervention as a Goal in Hypertension Treatment ( INSIGHT ) . To determine the success of single and combination therapy in achieving target blood pressures in such a population . DESIGN INSIGHT is a double-blind , prospect i ve outcome trial comparing the efficacy of the calcium channel blocker , nifedipine GITS , and the thiazide , co-amilozide , in preventing myocardial infa rct ion and stroke . We recruited 2996 men and 3454 women , aged 55 - 80 years , with blood pressure during placebo run-in > 150/95 mmHg or isolated systolic blood pressure > 160 mmHg from nine countries . Treatment allocation to nifedipine GITS 30 mg daily or co-amilozide ( hydrochlorothiazide 25 mg/amiloride 5 mg ) once daily was performed by minimization rather than r and omization to balance additional risk factors . This was followed by four optional increases in treatment : dose-doubling of the primary drug , addition of atenolol 25/50 mg or enalapril 5/10 mg , and then any other hypotensive drug excluding calcium blockers or diuretics . Target blood pressure was 140/90 mmHg or a fall > or = 20/10 mmHg . RESULTS Blood pressure at r and omization was 172+/-15 / 99+/-9 mmHg . Thirteen per cent of the patients were previously untreated . The proportions of each additional risk factors were : smoking > 10/day , 29 % ; cholesterol > 6.43 mmol/l , 52 % ; family history of premature myocardial infa rct ion or stroke , 21 % ; diabetes mellitus 20 % ; left ventricular hypertrophy , 10 % ; previous myocardial infa rct ion , other presentations of coronary heart disease , and peripheral vascular disease , each 6 % ; proteinuria , 3 % . Fifty-five per cent of patients had one additional risk factor , whereas 33 % , 9 % and 3 % had two , three or more additional risk factors , respectively . The blood pressure ( and falls in blood pressure ) at the end of titration and at 1 year after minimization was 139+/-12 / 82+/-7 mmHg ( 33+/-15 / 17+/-9 ) in the 5226 patients still on r and omized treatment The numbers requiring the four treatment increments were , respectively , 1591 , 780 , 597 and 294 , meaning that almost 70 % of patients on r and omized treatment in INSIGHT are receiving only the primary drug . At one year , 69 % of patients had a blood pressure < or = 140/90 mmHg . CONCLUSION INSIGHT is one of the first double-blind comparisons of active antihypertensive treatments , requiring high-risk patients to achieve sufficient power . Despite this requirement , it is possible to achieve good blood pressure control in most patients without the addition of multiple additional treatments that may dilute any differences between the primary agents
However , lack of data specifically examining outcomes in PAD patients should not detract from the overwhelming evidence on the benefit of treating hypertension and lowering blood pressure
BACKGROUND Peripheral arterial disease ( PAD ) causes considerable morbidity and mortality .
Hypertension is a risk factor for PAD .
Treatment for hypertension must be compatible with the symptoms of PAD .
Controversy regarding the effects of beta-adrenoreceptor blockade for hypertension in patients with PAD has led many physicians to stop prescribing beta-adrenoreceptor blockers .
Little is known about the effects of other classes of anti-hypertensive drugs in the presence of PAD .
This is the second up date of a Cochrane review first published in 2003 .
OBJECTIVES To determine the effects of anti-hypertensive drugs in patients with both raised blood pressure and symptomatic PAD in terms of the rate of cardiovascular events and death , symptoms of claudication and critical leg ischaemia , and progression of atherosclerotic PAD as measured by ankle brachial index ( ABI ) changes and the need for revascularisation ( reconstructive surgery or angioplasty ) or amputation .