Pacemakers are not a cure for bundle branch blocks but can help with underlying issues, specifically arrhythmias that cause the heart to beat irregularly due to heart attacks, age, or genetic conditions. One instance where a pacemaker may be beneficial to a bundle branch block is if an individual experiences frequent episodes of fainting. Because this side effect can lead to injury or drastically impact the person's quality of life, doctors may install a pacemaker to correct the problem.

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