Research enrollment and informed consent.

摘要

To the Editor: In their systematic review, Drs Dahabreh and Paulus confirmed that episodes of physical or sexual activity may be associated with acute coronary syndromes or sudden cardiac death.1 A valuable contribution of a systematic review is determination of different risks in subgroups. The meta-analysis1 found that the subgroup with greater habitual physical activity had a reduced risk of acute cardiac events after exposure to triggering activities.