ANN Ankle brachial index Cardiac Output Frictional Pressure Drop Heart Disease Impedance Cardiography MARD MRD Median nerve Minichannel Non-invasive QT Interval QTc Interval RR Interval Sensory nerve conduction studies Two-Phase Flow Type 2 Diabetes Ulnar nerve cardiovascular dysfunction diabetes mellitus menstrual cycle non-invasive peripheral artery disease postmenstrual phase premenstrual phase sympathetic function test