What is the typical rhythm associated with heart failure?

Heart failure often leads to changes in the heart's electrical conduction and mechanical function, which can result in various arrhythmias. Rapid atrial fibrillation is a common atypical rhythm associated with heart failure. This type of arrhythmia occurs when the atria experience chaotic electrical signals, leading to an irregular and often fast heartbeat. The presence of fluid overload and increased pressures within the heart chambers can create an environment conducive to developing atrial fibrillation.

Additionally, rapid atrial fibrillation exacerbates heart failure symptoms by reducing the efficiency of ventricular filling and increasing the heart rate, which can lead to further complications. While other rhythms like sinus rhythm, atrial flutter, and bradycardia can occur in patients with heart failure, they are typically less common in the context of acute or decompensated heart failure, where atrial fibrillation is most prevalent. Thus, rapid atrial fibrillation stands out as the typical rhythm observed in the context of heart failure due to its association with poorer outcomes and acute episodes of heart failure.