Case 1. An 18-year-old male patient, who complained of syncope, was brought to the emergency department by ambulance and admitted. The patient, who had a normal medical history, had not experienced syncope previously. He was not a smoker. For three hours, he sat with his friends in a cafe, where people smoked a water pipe, but he did not. He stated that he had a headache and felt dizzy after he left the cafe, and he could not remember what happened afterwards. People who witnessed the incident stated that he had fainted for approximately 4 to 5 minutes, but he had not displayed spasms or symptoms of an epileptic seizure. His vital measurements were normal at admission, and his Glasgow Coma Scale (GCS) score was 15. He was