Lisa Marie Presley died after second cardiac arrest, family signed DNR

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Lisa Marie Presley's heart stopped a second time after her hospitalization, but due to her desperate condition...her family had already ordered doctors not to resuscitate her.

Sources with direct knowledge tell TMZ...Lisa Marie was declared brain dead after being admitted to hospital on Thursday. As we first reported, doctors placed her in an artificial coma and she was on life support.

Background

Due to the fact that she was brain dead, we were told that the family members signed a DNR...do not resuscitate order, in case she collapses again .

Lisa Marie Presley dead at 54

Unfortunately, that's exactly what happened...Lisa Marie suffered a second cardiac arrest and was pronounced dead a short time later.

Of course, it's unclear how long she had been without oxygen before her housekeeper found her unconscious in her room on Thursday morning. CPR was administered... first by her ex-husband, Danny Keough, then by...