Fluoroscopy mode in cardiac X-ray imaging refers to the different levels of radiation dose rates delivered to the patient's skin, categorized as extra low, low, medium, and high fluoroscopy. Each mode indicates the intensity of radiation exposure measured in Gray per minute. The discussion highlights the importance of understanding these levels for patient safety and effective imaging. The original poster sought clarification on these modes but attempted to delete their initial post after receiving responses, leading to the thread being locked.