[Early repolarization in ECG. Definition, prevalence and prognostic significance].
Early repolarization defined as antero-lateral ST-segment elevation exists in 1-2 % of the general population and has been considered a benign ECG finding for decades. However, early repolarization, defined as infero-lateral J-waves, has in recent studies been associated with an increased - albeit low - risk of sudden and cardiovascular death. This ECG pattern is present in 3-13% of the general population. However, exercise training can induce all types of early repolarization, and the prevalence in the athletic population rises to 20-90%. There is large variability between sports (higher in endurance athletes) and also throughout the season (higher during times of peak fitness). In athletes, early repolarization, regardless of type, is considered benign. In asymptomatic non-athletes, the absolute risk is too low to use this ECG finding in clinical practice. In individuals with J-wave syndrome, on the other hand, ICD implantation should be strongly considered to prevent sudden cardiac death.
Montefiore Medical Center - Medicine Bronx, United States Montefiore Medical Center - Medicine Bronx, United States.
Philip
P
Aagaard
Hjärtkliniken, Karolinska Universitetssjukhuset - Stockholm, Sweden Hjärtkliniken, Karolinska Universitetssjukhuset - Stockholm, Sweden.
Julia
J
Sydow
Karolinska Universitetssjukhuset - Hjärtkliniken & Gymnastik & Idrottshögskolan Stockholm, Sweden - GIH Stockholm, Sweden.
Mats
M
Börjesson
Sahlgrenska Akademin, Göteborgs Universitet - Verksamhetsområde Kardiologi Göteborg, Sweden Sahlgrenska Akademin, Göteborgs Universitet - Verksamhetsområde Kardiologi Göteborg, Sweden.
Lennart
L
Bergfeldt
Hjärtkliniken, Karolinska Universitetssjukhuset - Stockholm, Sweden - .
Frieder
F
Braunschweig
D000200:Action Potentials / Q000502:physiology; D056352:Athletes; D016757:Death, Sudden, Cardiac; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D015995:Prevalence; D011379:Prognosis; D009626:Terminology as Topic; D014693:Ventricular Fibrillation / Q000503:physiopathology