Aubameyang and two other players were diagnosed with “cardiac lesions”.
Pierre-Emerick Aubameyang was left out of Gabon’s team to play Ghana in the Africa Cup of Nations on Friday due to a minor heart condition.
Arsenal are understood to be satisfied that Aubameyang’s condition is not serious.
The Gabonese Football Federation said in a statement: “According to the CAF medical commission, the players Pierre-Emerick Aubameyang, Axel Meye and Mario Lemina, barely out of Covid, cannot take part in this match.
“An examination showed cardiac lesions, and CAF did not want to take any risks.”