Study subjects scheduled for an EP procedure who have signed an informed consent form (ICF) will be admitted to the study. Prior to the EP procedure (e.g. in a hospital room or operating room at NYU Medical Center), either an employee of NYU or Hydrostasis will place sensor on subject's bicep, forearm, or wrist, start the sensor and connect the sensor to mobile app to start data collection.
Subjects will be consented to wear the AleriTM sensor prior to, during, and after an Electrophysiology Procedure. During this time, the system will measure the following parameters from subjects: HR, temperature, saline volume/rate, urine production volume, USG, BPO. Data will be retrospectively analyzed to determine if the system effectively operates under these conditions, and can effectively monitor hydration levels of subjects compared to currently available methods.