JACC: Case Reports is inviting all ECG lovers with a passion for ECG teaching to submit one example of interesting/complex ECGs with relative multiple-choice questions and explanations for this competition by April 15. Please note: this is a correction to the previous announcement, which requested three examples. The ECGs should be aimed at underscoring a specific sign or disease or at explaining complex arrhythmia features. Explanations should include, if possible, ladder-grams, imaging or illustrations, with the aim of helping the readers to understand each case and of being as much as possible didactic. ECG and relative explanations will be reviewed by JACC: Case Reports editorial board, who will select the best three candidates. Learn more and submit.