K_Z
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Sadly, Jahi's so young, it could be a long time before that muscle gives up.
Snipped for focus, and BBM. (Pardon my quirky ponderings about heart function and scroll on if desired. Quirky ponderings are an occupational hazard for me!)
Agree-- that is a fairly healthy 13 yo heart. She did sustain cardiac arrest, but presumably they returned her heart to a functional rhythm soon enough to prevent a lot of cardiac ischemia/ infarction, even though the anoxic brain injury was fatal.
We know that surgically denervated transplanted hearts function for years in their recipients. Jahi's heart is "functionally denervated" (just as her body is functionally decapitated), meaning her body has no central nervous system to produce sympathetic and parasympathetic effects on her heart. She is dependent on things like circulating adrenal hormones (catecholamines, etc) for increases and decreases in heart rate, cardiac output, etc. And as she has no ability to exercise her muscles (passive range of motion notwithstanding), the effects of the denervation are apparently minimal on perfusion of kidneys, gut, etc. In Jahi's particular case, there appears to be a stabilization of the positional blood pressure issues that existed in the ICU when she was first declared brain dead.
There have been so few cases of prolonged somatic support in brain dead patients that I don't think there is a good body of knowledge to tell us how long that period typically lasts (if there is a "typical" period.)
Here is a quick explanation of denervation effects in a heart transplant patient:
http://stanfordhospital.org/cardiov...t/patientEducation/physiologyDenervation.html
Barring a source of overwhelming infection-- typically urinary tract or pulmonary, it appears with good physical care of the body that a young, relatively healthy heart will continue to beat and perfuse organs for quite some time. With each of these "experiments", we learn more about how long the shell of a body can continue to function with a ventilator attached, and some source of calories (IV or enteral).
I'm reminded of the article about the 4 yo boy who was brain dead following meningitis, and his mother cared for him for another 20 years at home in the basement. He was profoundly microcephalic, as his skull and brain never grew, but his body gained weight and grew, mostly in the truncal area, and all extremities were poorly developed.
http://www.academia.edu/attachments...3NywyMDguMzguMTIzLjE4OQ==&ct=MTQwMTM3NDM4MA==
http://www.academia.edu/2819458/Lon...erial_meningitis-associated_brain_destruction
The whole situation is so very sad. If the body of Jahi does function for many years, I'm really concerned for the sanity and well-being of this mother and her living children. They are in such a deep, dark hole now, with the choices they have made about Jahi's body. It seems to me that it would be merciful if Jahi's heat just stopped, to release them from what NW apparently feels is a profound obligation. NW needs permission to let go, IMO.