ECG and Brain Devices provides an in-depth analysis of the technologies used to monitor heart and brain activity, focusing on their design, functionality, and clinical significance. The book introduces the principles of electrocardiography (ECG) to record electrical activity of the heart and discusses its applications in diagnosing cardiac disorders. It also explores various brain devices, including electroencephalography (EEG), functional magnetic resonance imaging (fMRI), and brain-computer interfaces (BCIs), which are instrumental in understanding brain function and treating neurological conditions. Emphasizing both theoretical knowledge and practical applications, the book includes real-world case studies and the latest technological advancements, making it a comprehensive guide for students, researchers, and healthcare professionals seeking to deepen their understanding of ECG and brain monitoring systems.