Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single lead pacemaker is seen with the lead terminating in the right ventricle there is no pneumothorax . Top normal heart size without pleural effusions . No consolidation . Chronic elevation of right diaphragmatic surface , stable since ___ . Calcified mitral annulus and atherosclerotic calcifications within the aortic knob are stable since ___ . No evidence of pulmonary edema , which is improved from ___ .
    OUTPUT:
    
Appropriate location of single lead ventricular pacemaker . No pneumothorax .