Introduction: Among the most important conditions with a basic neurological component that exacerbates cardiovascular dysfunction is also coronary artery disease. The cymba conchae (external ear) is innervated by the auricular branch of the NV, through which its sensory threads can be stimulated. By stimulating it in patients with coronary heart disease, vital functions can be affected. The method of stimulation, which is performed through an electrode inserted into external ear, is called transcutaneous electrical stimulation of the auricular nerve. Purpose: Measurement of the effects of transcutaneous stimulation of selected sites of the external ear, where the tips of the auricular branch of the NV are located, on respiratory, thermal and cardiac function. The aim of the diploma work was to establish a protocol to ensure safe and reproducible selective stimulation of the external ear. Methods: The subject was an adult man with confirmed coronary artery disease, who was prepared for measurement according to the established protocol. The stimulation of the auricular nerve was performed on him. A prototype device of transcutaneous elektrical stimulation of the auricular nerve was used to stimulate the NV fibers. The measuring components used were a thermistor, air flow measurement system, pulse oximeter, and blood pressure monitor. Measurements of respiratory, thermal, and cardiac function were performed before, during, and after stimulation. Results: To improve respiratory function, we were able to increase air flow by 1.6 l / min, respiration rate was accelerated by 2 min-1, and SpO2 was increased by 1.7%. To improve the thermal function, we managed to lower body temperature by 0.2°C. To improve cardiac function, heart rate was slowed by 2.5 min-1, systolic blood pressure was reduced by 9 mmHg, and diastolic blood pressure was reduced by 5 mmHg. Discussion and conclusion: The measured effects on the vital functions depend on the stimulated site of the external ear, thus these sites play a pivotal role in the application of selective transcutaneous stimulation. We found that respiratory, thermal, and cardiac function can be affected by transcutaneous stimulation of the auricular nerve, however the microlocation of the stimulation is important for the magnitude of the effect.