Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are obtained . A pulse generator seen overlying the left chest with two leads in standard position , one terminating in the right atrium and the other terminating in the right ventricle . Mild cardiomegaly is noted . There is no pneumothorax , pleural effusion or pulmonary edema .
    OUTPUT:
    
Dual - lead pacemaker in standard position with leads ending in the right atrium and right ventricle . Mild cardiomegaly .