Nerve regeneration

News of spinal nerve regeneration was splashed across the news.

It was a breakthrough, especially when the patient could achieve some of the lower limb movement. However, as our lecturer stated, the problem is: can it be replicable?

If it can be replicable, will it be possible to use it on Alzheimer's or Parkinson's patients?

Or maybe the same phenomenon can be achieved in regenerating the heart. transplant a myocyte...? Apparently, they have a variety of procedures to induce heart regeneration including sending growth factors etc. in nano particle capsules that either induces differentiation into muscle cells or stops the toxic effect of fibroblasts.

Reference

Hastings et al. 2014 Aug 27. Drug and cell delivery for cardiac regeneration. Adv Drug Deliv Rev. 

Heart failure

Heart failure is a disease which reduces heart contractility. This in turn reduces the amount of blood transporting nutrients.

Heart failure is caused by: blockages of coronary artery, reduced intracellular calcium and impaired energy production and utilisation. The major effects include: pulmonary or peripheral oedema and excessive heart activity.

Is there a faster way of detecting heart failure? why don't we make a nanobot that will be able to diagnose and detect heart problems? or something linked to the baroreceptors?

Why aren't the causes of heart failure targeted?