The Heartbeat meme, also known as the EKG or Heart Rate Monitor meme, uses a medical graph to visually represent emotional reactions to various stimuli. The template typically depicts a steady, rhythmic pulse for mundane activities, contrasted sharply by a frantic, high-intensity spike for a specific person, hobby, or stressful situation. It became a viral sensation as a relatable way to express excitement, anxiety, or obsession. Users across social media leverage this format to highlight everything from fandom devotion to the sheer panic of a low battery notification, making it a staple of expressive internet humor.