Published: Jan 23, 2012 7:11 PM EST
Updated: Jan 23, 2012 7:15 PM EST

Congresswoman Gabrielle Giffords says she's leaving Congress this week. The move comes after an assassin's bullet nearly ended her life in a rampage that left six dead.  

"I will step down this week," Giffords said.

In a video announcing her decision to resign from Congress, Arizona Representative Gabby Giffords had a simple message for her supporters. 

"Thank you for your prayers and for giving me time to recover," she continued. 

Giffords said she has more work to do on that recovery, a year after being shot in the head during a rampage that left six people dead. 

"I don't remember much," Giffords explained. 

Giffords was hosting a meet and greet outside a Tucson supermarket on January 8, 2011 when prosecutors say Jared Lee Loughner opened fire. Authorities believe he targeted the Congresswoman. 

After months of intensive rehabilitation, Giffords was greeted by a standing ovation when she returned to the House chamber in August for the debt ceiling vote.  But whether she would come back full-time remained uncertain.

Before she leaves office, Giffords plans to finish the event the gunman interrupted, holding a private gathering with some of the people who were there. She'll also attend the President's State of the Union address on Tuesday.

In a statement, President Obama said: "Gabby and her husband Mark have taught us the true meaning of hope in the face of despair, determination in the face of incredible odds, and now - even after she's come so far - Gabby shows us what it means to be selfless." 

"I'm getting better every day. My spirit is high. I will return and we will work together for Arizona and this great country," Goffords concluded.