What is one of the primary purposes of DDD pacing mode?

One of the primary purposes of DDD pacing mode is to maintain AV (atrioventricular) synchrony. In patients with heart block or other conduction disorders, DDD pacing allows the pacemaker to stimulate both the atria and the ventricles in a manner that preserves the natural timing of the heart’s contractions. This synchrony is crucial for optimal cardiac function, as it helps ensure that the atria contract and fill the ventricles with blood before the ventricles contract. By maintaining this coordination, DDD pacing can help improve cardiac output and prevent symptoms related to poor heart function, ultimately enhancing the patient's quality of life.