Renal vascular resistance using intravascular blood flow and pressure and associated systems, devices, and methods

A system comprising:

• a processor circuit configured for communication with a first pressure sensor, a second pressure sensor, and a flow sensor,
• wherein the processor circuit is configured to:
• determine if renal denervation is recommended for a patient based on a comparison between blood flow resistance with and without stimulation of a sympathetic nervous system of the patient, wherein the blood flow resistance is calculated using a single formula incorporating pressure and flow;
• and
• provide, to a display in communication with the processor circuit, an output based on if the renal denervation is recommended for the patient,
• wherein the blood flow resistance is distinct from fractional flow reserve (FFR), instant wave free ratio (iFR), and coronary flow reserve (CFR),
• wherein, to determine if the renal denervation is recommended for the patient, the processor circuit is configured to:
• calculate a first value of the blood flow resistance using first pressure measurements and a first flow measurement obtained without the stimulation of the sympathetic nervous system;
• and
• calculate a second value of the blood flow resistance using second pressure measurements and a second flow measurement obtained with the stimulation of the sympathetic nervous system,
• wherein the output comprises a visual representation of the first value of the blood flow resistance and a visual representation of the second value of the blood flow resistance.