Evidence on harms was limited , but direct harms seemed minimal ( for resting ECG ) or small ( for exercise ECG ) .
BACKGROUND Coronary heart disease is the leading cause of death in adults .
Screening for abnormalities by using resting or exercise electrocardiography ( ECG ) might help identify persons who would benefit from interventions to reduce cardiovascular risk .
PURPOSE To up date the 2004 U.S. Preventive Services Task Force evidence review on screening for  resting or exercise ECG abnormalities in asymptomatic adults .
Sudden unexpected cardiac death as a function of time since the detection of electrocardiographic and clinical risk factors in apparently healthy men: the Manitoba Follow-Up Study, 1948 to 2004.
PURPOSE As the first and only manifestation of ischemic heart disease , sudden unexpected cardiac death ( SUCD ) is a serious clinical and epidemiological concern . Prospect i ve population studies permit the identification of risk factors for SUCD . Knowledge of the short- and long-term risks for SUCD are key to underst and ing the basis of any intervention . The present paper explores the effect of time since the detection of factors on the risk for SUCD . SUBJECTS AND METHODS The Manitoba Follow-Up Study is a longitudinal , prospect i ve study of 3983 originally healthy young men who have been followed with routine medical examinations since 1948 . During 56 years of follow-up , SUCD occurred in 171 men . This analysis examined 21 possible risk factors for SUCD , including  clinical findings , social variables  and  electrocardiographic abnormalities . Time-dependent covariate Cox proportional hazard models were used to estimate age-adjusted relative risks for SUCD . In multivariate models , the relative risk of SUCD was estimated as a function of time since the documentation of each risk factor . RESULTS Excess alcohol consumption and T wave changes were associated with a high short-term risk for SUCD . Arterial hypertension and ST/T changes had sustained excess risk over both the short and long term . Newly developed left bundle branch block was a highly significant short-term risk that diminished with time . CONCLUSION These findings add new information for the clinical management of risk factors . The identification of time since the detection of these risk factors is an important consideration to reduce SUCD
Evidence on harms was limited , but direct harms seemed minimal ( for resting ECG ) or small ( for exercise ECG ) .
BACKGROUND Coronary heart disease is the leading cause of death in adults .
Screening for abnormalities by using resting or exercise electrocardiography ( ECG ) might help identify persons who would benefit from interventions to reduce cardiovascular risk .
PURPOSE To up date the 2004 U.S. Preventive Services Task Force evidence review on screening for  resting or exercise ECG abnormalities in asymptomatic adults .