Health monitoring devices consisting of blood pressure monitors; blood pressure measuring equipment; wearable cuff-less arm monitors used to measure blood pressure, peripheral and central body temperature, heart rhythm, irregular heart rate, arrythmia, respiration, respiratory rate and respiratory patterns for medical use; wearable cuff-less arm monitors used to measure apnea, heart function, hemodynamics, cardiac output, cardiac filling pressures, central blood pressure, peripheral resistance, arterial stiffness, pulse transit time and tonometry for medical use; wearable cuff-less arm monitors used to measure arterial imaging, and venous imaging for medical use; medical instruments for recording heart activity, namely, electrocardiograms to diagnose and monitor peripheral and central body temperature, heart rhythm, irregular heart rate, arrythmia, respiration, respiratory rate, and respiratory patterns; medical instruments for recording heart activity, namely, electrocardiograms to diagnose and monitor apnea, heart function, hemodynamics, cardiac output, cardiac filling pressures, central blood pressure, peripheral resistance, arterial stiffness, pulse transit time, and tonometry; medical instruments for recording heart activity, namely, electrocardiograms to diagnose and monitor arterial imaging, and venous imaging; medical instruments for recording heart activity, namely, electrocardiograms to examine peripheral and central body temperature, heart rhythm, irregular heart rate, arrythmia, respiration, respiratory rate, and respiratory patterns; medical instruments for recording heart activity, namely, electrocardiograms to examine apnea, heart function, hemodynamics, cardiac output, cardiac filling pressures, central blood pressure, peripheral resistance, arterial stiffness, pulse transit time, and tonometry; medical instruments for recording heart activity, namely, electrocardiograms to examine arterial imaging, and venous imaging; medical sensors to be worn by a human to monitor blood pressure and heart rate data that can be transmitted for medical purposes to physicians; medical diagnostic, examination, and monitoring equipment, namely, electronic blood pressure monitors and electronic heart rate monitors; electronic medical instruments for recording blood pressure, heart rate, blood oxygen saturation; electronic medical instruments for measuring oxygen content of blood and electrocardiograms for measuring peripheral and central body temperature, heart rhythm, irregular heart rate, arrythmia, respiration, respiratory rate, respiratory patterns, apnea, heart function, hemodynamics, cardiac output, cardiac filling pressures, central blood pressure, peripheral resistance, arterial stiffness, pulse transit time, and tonometry; electrocardiograms for detecting arterial imaging, and venous imaging