As a child she showed a penchant for the performing arts, using a box for a platform and giving recitals for family and friends.

[4] She also appeared in "Mariana or el Alba" and "Los Soles Truncos" by Marqués; "Doce Paredes Negras" by Juan González-Bonilla; and "Tiempo Muerto" by Manuel Méndez Ballester.

[3] In 1969 she starred in the premiere of "La Pasión según Antigona Pérez" by Luis Rafael Sánchez, who wrote the part specifically for her.

[4] In the 1960s, she co-founded the Teatro El Cemí with actors Marcos Betancourt, Jacobo Morales, and Elín Ortiz.

[3][4] Vázquez suffered from a congenital heart condition, aortic stenosis, and had a series of surgeries starting in her twenties.

[8] A play written in her honor, Myrna Vázquez: Reconocete by Laura Figueroa and Fátima Seda-Barletta, was presented at the Cultural Center of Cidra in 1979.

[3] Another theatrical tribute, Son Corazón / Heartstrung by Rosa Luisa Márquez, premiered at the Jorge Hernández Cultural Center in Villa Victoria, Boston, in July 1995.