What cardiac arrhythmia is commonly associated with hypoxemia and hypokalemia?

Premature Ventricular Contractions (PVCs) can frequently arise in scenarios involving both hypoxemia (low levels of oxygen in the blood) and hypokalemia (low potassium levels). These arrhythmias occur when the ventricles contract earlier than normal, which can be influenced by various factors, including electrolyte imbalances and oxygen deficiency.

Hypokalemia has a direct effect on cardiac myocytes (heart muscle cells), disrupting the normal depolarization and repolarization processes that are crucial for maintaining a regular heartbeat. Low potassium levels can lead to increased excitability of cardiac tissue, resulting in the development of PVCs. Additionally, hypoxemia can exacerbate this situation, as the heart itself requires adequate oxygen to function optimally. When the tissue is compromised due to low oxygenation, the risk of arrhythmias, including PVCs, increases.

In the context of the other options, while both atrial fibrillation and ventricular tachycardia can occur in various cardiac and respiratory conditions, they are not as closely linked specifically to the combination of hypoxemia and hypokalemia as PVCs are. Bradycardia, which involves a slower-than-normal heart rate, is less likely to be driven by those particular conditions compared to