there were observed 7 patients without significant forms of ventricular arrhythmias in ecg 24-hours monitoring , but with several , coexisting , well known in literature sudden cardiac death risk factors such as : history of cardiac arrest , sudden cardiac death occurrences in a family before the age of 50 , preexcitation syndrome , ecg repolarization disorders , history of fainting , physical activity performance or mental stress .
C0018787
cardiac
C0032915
preexcitation