This section describes the normal ECG findings in athletes, including all the ECG aspects related with physiological cardiac adaptation to training, in absence of any other signs suggestive for cardiac pathology. The electrocardiographic findings are divided in three categories: normal, abnormal and borderline. These criteria are based on the latest scientific knowledge and provided physician with a useful tool to accurately recognize the ECG anomalies related to exercise-induced normal finding and exercise-unrelated pathological abnormalities potentially related to SCD in athletes. In February 2015, in Seattle, a consensus of experts updated the current standard criteria for ECG interpretation in asymptomatic athletes from 12 to 35 years of age. So in 2014 the “Refined Criteria” were published. In particular, Afro-American athletes usually show ECG alterations apparently related to cardiomyopathy, but are normal variant.
However, the Seattle criteria were based only on Caucasian athletes and they did not describe some ECG findings that are considered a normal variant in some ethnicity. Then in Seattle in 2012, an international team of experts wrote the so-called the “Seattle Criteria”, a revision of ECG interpretation criteria in athletes, in order to increase the specificity without reducing the sensibility of the previous ESC 2010 recommendations. In 2010 the European Society of Cardiology published the recommendations for interpretation of 12-lead electrocardiogram in the athletes with the main objective to differentiate the physiological sport-related adaptive ECG changes observed in athletes from the pathological ECG findings suggestive for cardiovascular disease. In the past, different criteria have been proposed, so a team of experts in sports cardiology aimed to standardize the criteria in ECG interpretation, in order to achieve the maximum sensibility and to improve the specificity, because of the number of false positive is strictly related with the type of criteria and the experience of the operators. However, previous data showed that adding the ECG to pre-participation screening evaluation increased the accuracy to detect an underlying cardiovascular disease, in comparison with physical examination and medical history alone. At present, there is no consensus regarding the optimal strategy for athletes’ pre-participation screening. Recent evidences in the prevention of sudden cardiac death (SCD) confirmed the importance of pre-participation cardiovascular screening in athletes to early identify, and further disqualify from the competition, all the athletes, if any, affected by life-threatening serious cardiac pathologies that can lead to SCD.
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