Cardioversion can cause stroke if it dislodges a blood clot in the left atrium, which travels to the brain causing stroke, as stated by the American Heart Association. Blood clots in the left atrium are usually formed due to a condition called atrial fibrillation. To avoid the occurrence of stroke, a doctor will prescribe medication that helps to inhibit clotting, such as warfarin.
The doctor usually prescribes a patient medication that needs to be taken 2 to 3 weeks before the procedure. On the day of the procedure, the doctor will carry out a procedure called transesophageal echocardiography, which helps to determine the presence of clots. People with high risk of getting stroke are those who have had arterial fibrillation for more than 48 hours, as stated by WebMD. Such patients will have to wait for weeks, while using medications, to undergo the procedure.
Cardioversion is a medical procedure that uses electrical current to restore the regular rhythm of the heart, as stated by WebMD. This procedure is used in treating a condition called arrhythmias, irregular beating of the heart. This condition causes poor circulation of blood to the brain and in the heart. Additional medications may be used before and after the procedure to contain the condition.