Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left pectoral pacer has leads ending in the right atrium , right ventricle and coronary sinus . Moderate cardiomegaly is stable since ___ . The aortic knob is calcified . The lungs are clear without focal opacity , pleural effusion or pneumothorax . Surgical hardware is noted in the right humeral head .
    OUTPUT:
    
No acute cardiopulmonary process . Moderate cardiomegaly is stable since ___ .