AI-generated deepfake videos depicting humans are getting more advanced, and more common, by the day. One of those is the presence of a human pulse. The findings suggest that heart rate and pulse—once considered relatively reliable indicators of authenticity—may no longer hold up against the most advanced generative AI deepfake models. Deepfakes can be used to generate images, video, and audio with varying degrees of realism. Instead, the deepfake videos appeared to have “inherited” the heartbeat signals from the original videos they were based on.