MYH6 (Myosin Heavy Chain 6): MYH6 is a gene that encodes the alpha heavy chain subunit of cardiac myosin, a motor protein found in the heart muscle. This protein is essential for cardiac muscle contraction, enabling the heart to pump blood efficiently throughout the body. The alpha heavy chain plays a crucial role in atrial contraction, supporting the initial filling phase of the ventricles. Mutations in MYH6 have been linked to various cardiac disorders, including atrial septal defects, cardiomyopathies, and heart rhythm abnormalities, emphasising its vital role in heart function and development.