The reality star confirmed she will have surgery but would not disclose when

Kim Zolciak-Biermann is disclosing new details about her heart condition.

After revealing on Good Morning America on Thursday that she has a patent foramen ovale, a “hole in her heart that never closed,” the reality star explained the condition and her treatment plans in an interview with E!

“I had a blood clot, they don’t know if it came from my leg or my pelvis,” Zolciak-Biermann said in the interview, which aired Thursday night. “Most people have a filter so it can’t cross over to the other side of your heart, but because I do have a valve – they call it a hole, but it’s more like a valve that never closed when I was born – the blood clot was able to transfer and go through the hole, which stopped oxygen to my brain on the right side of my brain.”

Zolciak-Biermann, 37, was hospitalized for a mini stroke Sept. 23. The Don’t Be Tardy star said Thursday that the condition is genetic and that her aunt suffered from the “exact same thing” at the same age.

“I said, ‘My aunt had a stroke, she had two of them before they found this hole in her heart,’ so they kind of immediately were looking for that,” Zolciak-Biermann said.

Zolciak-Biermann also revealed that the wall of her heart is “weak,” a condition she says goes “hand in hand” with the PFO.

The reality star was a competitor on Dancing with the Stars when she had the mini stroke.

While she was cleared by her doctor to dance, she was unable to fly to Los Angeles to perform on the Sept. 28 broadcast. Subsequently, she was forced to withdraw.

Now, the reality star is grateful for DWTS and says the mini stroke was actually “a blessing.”

“Had I not been so active with Dancing with the Stars and also flying – that’s probably what in essence caused the blood clot – it really is a blessing in disguise,” Zolciak-Biermann said. “Because now I can really fix it and move on instead of having a true stroke where I never recover, or my doctor said a massive heart attack.”

As for what treatment she will undergo, the reality star said there are two things one can do in her situation: “blood thinners the rest of your life, or you have surgery to fix it, there’s an apparatus that they use.”

“Blood thinners at 37 is a lot for anybody so we will have to fix it at some point,” Zolciak-Biermann said before confirming that she will “have heart surgery,” though she would not reveal when.

“I think anything that has to do with your heart and brain is pretty scary, but I mean, heck, I’ve been through it, I’m okay,” Zolciak-Biermann said. “I’m super excited to help with the migraines and just not be as worried.”

Though Zolciak-Biermann and her partner Tony Dovolani fiercely campaigned to be reinstated as competitors back on the show, they will not return until the finale.

“You really don’t realize how precious life is and how something can just – it literally happened in a second and my whole life changed,” she said.