medical apparatus, instruments, devices, and medical device systems consisting of medical devices, all for treating heart failure, chronic kidney disease, end stage renal disease, myocardial infarction, anxiety, contrast nephropathy, diabetes, metabolic disorder and insulin resistance; medical devices for sensing nerve activity and for performing denervation; energy emitting catheter-based systems consisting of medical devices and devices for medical procedures in the nature of neuromodulation and denervation of the autonomic nervous system for use in treating a variety of medical conditions, including, heart failure, chronic kidney disease, end stage renal disease, myocardial infarction, anxiety, contrast nephropathy, diabetes, metabolic disorder and insulin resistance, among other medical conditions and also consisting of plastic cartridges for medical fluids, carts, and remote controls for medical devices used in connection with the preceding systems and devices