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 .
Telephonically-monitored home exercise early after coronary artery bypass surgery.
To evaluate the usefulness of telephonically-monitored home exercise in patients within two weeks postcoronary bypass surgery , we r and omly enrolled 46 male patients in a 12-week home program of either short walks or bicycle ergometry . Home exercise was done five times weekly and monitored both before and immediately after three times weekly . New arrhythmias or conduction disturbances were detected in 18 of 23 ( 78 percent ) of the bicycle group and in 20 of 23 ( 87 percent ) of the short walk patients . New symptoms developed in three patients , two from the short walk group and one from the bicycle group . Two bikers and one walker developed elevated blood pressure ; all were referred to physicians and were successfully managed . Electrocardiographic abnormalities led directly to diagnostic and therapeutic intervention in nine of the 46 patients -four bikers and five walkers . There were no complications such as ventricular tachycardia or ventricular fibrillation . Technically clear telephone rhythm strips were obtained from patients calling both locally and long distance
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 .