I am Nicole Cornell's mother Patricia. Nicole has had many things that she has fought with sense she was a child. I have copied things off the web to explain what she is diagnosed with better than I am able to explain.  
    When  she was three she had to have eye muscle surgery for having crossed eyes. Then when she was 10 she had to have an Ingenal hernia repaired. 
When she was 11 she had to have her tonsils and adenoids out that is when they found out that she has an autoimmune disease called    
Hashimoto's thyroiditis which is an autoimmune disorder, in which the body attacks thyroid tissue. The tissue eventually dies and stops producing hormones. Hashimoto's causes cold sensitivity and muscle aches. Nicole spends nearly every day with pains, Due to her thyroid disease not being controlled well with the medications. She will be on two different hormone replacements for the thyroid disease for the rest of her life.  
Sense Nicole was 10 she has been in and out of the ER and hospital for chest pain and shortness of breath. Finally when she was almost twenty and kept passing out they found a hole in her heart the size of a quarter . 
  Called an ASD, an atrial septal defect (ASD) which is a hole in the wall between the left and right chambers. As a result of the hospital not finding this early on the right side of her heart became enlarged. When a child is  born with an ASD it is a form of CHD 
 Which present at birth and can affect the structure of a baby’s heart and the way it works. They can affect how blood flows through the heart and out to the rest of the body. CHD can vary from mild (such as a small hole in the heart) to severe (such as missing or poorly formed parts of the heart).
About 1 in 4 babies born with a heart defect has a critical CHD (also known as critical congenital heart disease).1 Babies with a critical CHD need surgery or other procedures in the first year of life. Unfortunately for Nicole hers was not discovered till early adult hood thus causing her to have trouble when trying to play sport through high school due to shortness of breath while doing activity. 
    After the the hole in her heart was closed she started having very fast or racing  heartbeats which are called   Supraventricular .tachycardia (SVT) causes episodes of a fast heartbeat. Thumping heart sensations (palpitations) and other symptoms may occur during each episode. Regular medication can prevent episodes of SVT. Another treatment option in some cases is to destroy a tiny part of the heart that triggers the SVT.  The cause of Nicole's SVT is because she has a sinus node defect. As a result she was put on two different heart medication which she will probably be on for the rest of her life to keep her heart rate low enough for her to lead a normal life.      
   Nicole also has  chronic hypokalemia,   Hypokalemia occurs when the blood’s potassium levels are too low. A normal level of potassium is 3.6-5.2 millimoles per liter. Levels below 3.6 are considered low. Anything below 2.5 millimoles per liter is very low. Nicole has had a potassium as low as 1.9 this put her in the hospital with chest pain for several days.  They are not sure why her potassium keeps dropping but they are looking into it. She has probably been in the hospital more then 10 times this year for this alone. They  are leaning towards kidneys problems.
   Early this fall Nicole at work and collapsed in pain. She was suffering for the pain of hydronephrosis which was being caused from a kidney stone that was obstructed her left utter. Kidney stones put her in the hospital for a little over a week.  She ended up passing four stones in that time. 
  The last trip to the hospital was for a complex migraine . This migraine caused her right arm and both legs to become unusable for several days. Nicole had to work with physical therapy to regain her strength to walk and climb stairs. After a week she was sent home still had the headache . The complex migraines that she gets are worse than a headache most people have experienced they are very debilitating. And can be hard to treat. 
  I'm not sure if I have everything listed that she has gone through and still is going through . The biggest is the heart defect and her low potassium which will be a life long problem for her and causes frequent hospitalization for her. 

She was an EMT with the Milford Emergency Squad, and now works for a paid EMT service. So, while she is fighting for her own life at times; she is saving others.