Dellanos graduated from the University of Miami with a Bachelor’s degree in Journalism in 1986.

In 1991, Dellanos married Dr. Alejandro Loynáz, and in December 30, 1993, she would give birth to the couple’s only daughter, Alexa Carolina Loynáz Dellanos.

She got her first break in 1992 when she co-hosted the popular Univision news program Primer Impacto (First Impact). Dellanos would continue to serve as co-host of Primer Impacto until 2004.

Subsequently, after almost seven years of marriage, and while their daughter was just a 4 to 5 year old, Dellanos and Loynáz divorced in 1998.

In 2001. she was named as the Hispanic of the Year by Direct Marketing Association of America. Myrka was also chosen as a Goodwill Ambassador for the International Rescue Committee, which is part of the United Nations and helps rescuing refugees.

Myrka has won the Hispanic Leadership Award by the Hispanic Heritage Council. In 2003, she was named as ‘Person of the Year’ by the Organization of Ibero-American Journalists.

In 2003, she began a highly publicized relationship with Mexican singer Luis Miguel, whom she was previously engaged to before ending their relationship in 2005.

In 2004, Myrka was chosen as the ‘Star of the Year’ by readers of the magazine “People en Español”. Also, she served as the host of the celebrations of Hispanic Heritage Month at the White House in Washington D.C.. She was appointed by U.S. President George W. Bush as a member of the Freedom Corps, a group consisting of 25 people who work together to promote charitable giving.

On April 8, 2008, Dellanos married Cuban-born pharmaceutical representative Ulyses Daniel Alonso at a private ceremony in Coral Gables, Florida. The couple later appeared on the July 2, 2008 cover of People en Español. On August 25, 2008, Alonso was arrested and charged with domestic battery. The following day, a police report was released, detailing the events leading to his arrest. On August 29, 2008, the Coral Gables police department released audio of the 9-1-1 call made by Dellanos. On March 18, 2009, Dellanos and Alonso filed for divorce, citing irreconcilable differences.

Later, Dellanos turned towards social service and other humanitarian causes, such as providing help for orphaned children and for victims of domestic abuse. In 2013, she was named spokesperson for “I Am Second”, a movement meant to provide spiritual inspiration and hope to individuals dealing with various life issues, such as abortion, divorce, and child abuse.

After an 8-year absence from broadcast journalism, in 2013, Dellanos returned to television as host and contributor for American-based Hispanic network Estrella TV and its news-magazine En la Mira con Enrique Gratas.