Flecainide is a medication that helps control irregular heart rhythms (arrhythmias). It works by slowing down electrical signals in the heart to maintain a normal heart rhythm.

Beta-blockers are medications that reduce the workload on the heart and help control heart rate. They work by blocking the effects of certain stress hormones on the heart.

Calcium channel blockers are medications that help relax blood vessels and reduce the heart’s workload. They also help control irregular heart rhythms by affecting how calcium moves in heart cells.

Quinidine is a medication used to treat irregular heart rhythms. It works by stabilizing electrical activity in the heart to help maintain a regular heart rhythm pattern.

Andersen-Tawil Syndrome – A rare genetic disorder that affects the heart’s rhythm and can cause periodic muscle weakness. The condition disrupts the normal movement of ions in heart cells and muscle cells, leading to irregular heartbeats. People with this syndrome may experience episodes of temporary muscle weakness that can affect different parts of the body. The condition is present from birth, though symptoms may not appear until childhood or early adulthood.

Multifocal Ectopic Purkinje-related Premature Contractions – A rare heart rhythm condition where multiple areas in the heart’s electrical system produce extra heartbeats. These extra beats originate from the Purkinje fibers, which are specialized heart cells that help coordinate heartbeats. The condition causes frequent premature heartbeats that can occur throughout the day. It is typically present from an early age and can persist throughout life.