Blue Heart (Spanish: Corazón Azul) is a 2021 independent sci-fi Cuban film directed, written and produced by Miguel Coyula, starring Lynn Cruz, Carlos Gronlier and Héctor Noas.

In this alternative reality, Fidel Castro shepherds a program to create the New Man (utopian concept) with genetic engineering, and save the Cuban revolution.

Caso took still pictures on the set of Corazón Azul before being summoned by Cuban State security for an interview questioning his friendship with director Miguel Coyula and Lynn Cruz, who were both described by the agents as troublemakers who may be working for the CIA.

[6] In Cineaste, film critic Matthew David Roe referred to Blue Heart as: "The culminating point of Miguel Coyula´s artistic growth...

It was withdrawn from the main competition and placed in the Cinema of the Young section, despite the director being 44 years old at the time, and Corazón Azul was his fourth feature.