atrium dextrum (noun)

1. In the movie, the main character undergoes open-heart surgery to repair a blockage that occurred in the atrium dextrum.

2. The anime series featured a plotline where the protagonist developed a rare condition affecting the atrium dextrum.

3. In one episode of the cartoon series, the characters embark on a mission inside the atrium dextrum to retrieve a lost artifact.

4. The novel describes a romantic scene taking place in the atrium dextrum of the protagonist's heart, symbolizing their deep love for each other.