This study introduces a novel approach for concealing images based on the Atrial Fibrillation (AF) model. Atrial fibrillation, a common cardiac arrhythmia, exhibits irregular electrical activity in the heart's atria. Leveraging the chaotic nature of AF, this method transforms images into encrypted forms, making them visually indistinguishable from random noise. The encryption process involves embedding image data into the chaotic dynamics of the AF model, ensuring robust concealment. Experimental results demonstrate the effectiveness of the proposed scheme in concealing images while preserving their visual quality and security against unauthorized access.