Etacizin is an antiarrhythmic medication used to treat irregular heartbeats. It works by stabilizing the electrical activity in the heart, helping to maintain a normal heart rhythm. This medication is particularly used in patients who have atrial fibrillation, a condition where the heart beats irregularly and often too fast.

Propafenone is also an antiarrhythmic medication that helps control abnormal heart rhythms. It works by slowing down electrical signals in the heart to help it maintain a regular beating pattern. This medication is commonly used to treat various types of irregular heartbeats, including atrial fibrillation, and helps prevent episodes of abnormal heart rhythm from occurring.

Atrial Fibrillation – A heart rhythm disorder where the upper chambers of the heart (atria) beat irregularly and often rapidly, out of coordination with the lower chambers (ventricles). This condition occurs when the heart’s electrical system malfunctions, causing chaotic electrical signals that make the atria quiver instead of contracting effectively. The irregular heartbeat can lead to poor blood flow through the heart, potentially causing symptoms such as heart palpitations, shortness of breath, and fatigue. Atrial fibrillation can be occasional, persistent, or permanent, with episodes that may come and go or last for extended periods. The condition becomes more common with age and often affects people who have other heart conditions.