What condition are beta-blockers primarily used to treat?

Beta-blockers are primarily used to treat atrial fibrillation because they effectively reduce heart rate and control the rhythm of the heart. In atrial fibrillation, the electrical signals in the heart become disorganized, leading to an irregular and often rapid heart rate. By blocking the effects of adrenaline on the heart, beta-blockers help to slow down the heart rate, improve heart function, and reduce the risk of complications associated with this arrhythmia.

While beta-blockers are also indicated for other conditions such as heart failure and angina, their specific role in managing atrial fibrillation is crucial due to the need for rate control in patients with this particular arrhythmia. This medication class is often a first-line therapy for controlling the undesirable heart rate in atrial fibrillation, which is essential for preventing symptoms such as palpitations, dizziness, and fatigue that can result from the rapid and irregular heartbeats characteristic of this condition.