Bundle Branch Block

If you have a right bundle branch block and you’re otherwise healthy, you might not need a full medical checkup. If you have a left bundle branch block, you will need a thorough medical exam.

Tests that can be used to diagnose a bundle branch block or its causes include:

• Electrocardiogram (ECG or EKG). This quick and painless test measures the electrical activity of the heart. During an ECG, sensors (electrodes) are attached to the chest and sometimes to the arms or legs. An ECG can show how well the heart is beating. It can show signs of a bundle branch block, as well as which side of the heart is being affected.
• Echocardiogram. This test uses sound waves to provide detailed images of the heart and heart valves. It can show the structure and the thickness of the heart muscle. Your provider can use this test to pinpoint a condition that caused the bundle branch block.

Most people with bundle branch block don’t have symptoms and don’t need treatment. For example, left bundle branch block is not treated with medications. However, treatment depends on the specific symptoms and other heart conditions.

Medications

If you have a heart condition causing bundle branch block, treatment might involve medications to reduce high blood pressure or reduce symptoms of heart failure.

Surgeries and other procedures

If you have bundle branch block and a history of fainting, your health care provider might recommend a pacemaker. A pacemaker is a small device implanted under the skin of the upper chest. Two wires connect it to the right side of the heart. The pacemaker releases electrical impulses when needed to keep the heart beating regularly.

If you have bundle branch block with low heart-pumping function, you may need cardiac resynchronization therapy (biventricular pacing). This treatment is similar to having a pacemaker implanted. But you’ll have a third wire connected to the left side of your heart so the device can keep both sides in proper rhythm. Cardiac resynchronization therapy helps the heart’s chambers squeeze (contract) in a more organized and efficient way.