Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Pacemaker is in unchanged position with three appropriately - placed leads . One lead terminates in the right atrium , the second in the anterior aspect of the right ventricle , and the third passes through the coronary sinus and terminates within the left ventricle . There is no evidence of pneumothorax , mediastinal widening , or other procedural complication . The mild cardiomegaly is stable . There is no pleural effusion .
    OUTPUT:
    
Biventricular pacemaker with three appropriately placed leads .