Final answer:
Atrial fibrillation is the condition that places a patient at risk for an embolic stroke because it can lead to the formation of blood clots that may travel to the brain and obstruct blood flow.
Step-by-step explanation:
Among the conditions listed, Atrial fibrillation places a patient at risk for an embolic stroke. Atrial fibrillation is a type of heart arrhythmia where the upper chambers of the heart (atria) beat irregularly. This irregular heartbeat can lead to the formation of blood clots in the heart. If a piece of a clot breaks off, it can travel through the bloodstream to the brain, where it can become lodged in a blood vessel, causing an embolic stroke by obstructing blood flow to a part of the brain. The other conditions mentioned, such as Bradycardia, Deep vein thrombosis, and a history of Myocardial Infarction (MI) are associated with different risks but are not direct reasons for an embolic stroke.