Similarly , there was no clear evidence of effect for cardiovascular risk factors , although again the number of studies reporting these was small .
There was some evidence for beneficial effects on HRQOL , dietary outcomes , and physical activity , although firm conclusions can not yet be made .
The effects on healthcare utilisation and cost-effectiveness are also inconclusive , and trials are yet to measure the impact of  Internet interventions on compliance with medication .
BACKGROUND The Internet could provide a means of delivering secondary prevention programmes to people with coronary heart disease ( CHD ) .
OBJECTIVES To determine the effectiveness of Internet-based interventions targeting lifestyle changes and medicines management for the secondary prevention of CHD .
Randomized Comparison of Elective Stent Implantation and Coronary Balloon Angioplasty Guided by Online Quantitative Angiography and Intracoronary Doppler
Background —The purpose of this study was to compare long-term outcomes of coronary stenting in all lesions  ( elective stenting ) or only in lesions with inadequate morphological and functional results after balloon angioplasty ( guided PTCA ) .  Methods and Results —Treatment of multivessel disease , with any lesion length and vessel size , was allowed provided that all lesions were suitable for stent implantation .  Patients were r and omized to elective stent implantation ( n=370 ) or guided PTCA ( n=365 ) . An optimal PTCA result ( residual diameter stenosis ≤35 % , coronary flow reserve measured with a Doppler guidewire > 2.0 , absence of threatening dissections ) was achieved in 166 lesions ( 43 % ) . The remaining 218 lesions underwent stent implantation ( provisional stenting )  . Final residual diameter stenosis was lower in the elective and provisional stent groups ( 9.3 % and 10.2 % ) than in the optimal PTCA group ( 24.8 % , P < 0.00001 ) . On an intention-to-treat analysis , the probability of ≥1 major adverse cardiac event at 12 months was 17.8 % in the elective stenting group and 18.9 % in the guided PTCA group ( 20.1 % for optimal PTCA and 18.0 % for the provisional stenting subgroup , P = NS ) . The incidence of repeat target lesion revascularization at 1 year was 14.9 % in the elective stent group and 15.6 % in the guided PTCA group ( 17.6 % for optimal PTCA and 14.1 % for the provisional stenting subgroup , P = NS ) . Conclusions —When balloon angioplasty is guided by online quantitative angiography and Doppler-derived coronary flow reserve , with provisional stenting reserved for suboptimal results , early and late clinical outcomes are comparable to those achieved by elective stenting of all patients
Similarly , there was no clear evidence of effect for cardiovascular risk factors , although again the number of studies reporting these was small .
There was some evidence for beneficial effects on HRQOL , dietary outcomes , and physical activity , although firm conclusions can not yet be made .
The effects on healthcare utilisation and cost-effectiveness are also inconclusive , and trials are yet to measure the impact of  Internet interventions on compliance with medication .
BACKGROUND The Internet could provide a means of delivering secondary prevention programmes to people with coronary heart disease ( CHD ) .
OBJECTIVES To determine the effectiveness of Internet-based interventions targeting lifestyle changes and medicines management for the secondary prevention of CHD .