A nurse is educating a Type 1 diabetic client with new-onset atrial fibrillation about the risks associated with the condition. Which complications should the nurse emphasize?

Educating a patient with atrial fibrillation requires applying knowledge of cardiac hemodynamics and the coagulation cascade. The nurse must focus on how ineffective atrial contractions lead to blood stasis, increasing the probability of clot formation and subsequent systemic embolization. Choice A rationale Atrial fibrillation does not directly cause hyperglycemia. While the stress of an acute arrhythmia might slightly elevate blood glucose due to cortisol release, it is not a primary complication or a major risk specifically linked to this rhythm. Choice B rationale Diabetic retinopathy is a microvascular complication resulting from chronic poor glucose control over many years. It is not exacerbated or caused by the onset of atrial fibrillation, which is a macrovascular and electrical conduction issue of the heart. Choice C rationale In atrial fibrillation, the atria quiver instead of contracting effectively, allowing blood to pool in the left atrial appendage. This stasis leads to thrombus formation; if a clot dislodges, it can travel to the brain. Choice D rationale Diabetic ketoacidosis is typically triggered by infection, insulin omission, or extreme physiological stress in Type 1 diabetics. While an arrhythmia is a stressor, the most specific and dangerous direct risk of atrial fibrillation remains systemic thromboembolism