Final answer:
The impressions of a cardiologist asked to determine whether a patient is a good surgical risk would be considered a consultation. This is because it involves expert assessment and advice, which is the characteristic of a consultation service provided by a specialist.
Step-by-step explanation:
The impressions of a cardiologist asked to determine whether a patient is a good surgical risk would normally be considered a consultation. This is because consultation involves the assessment of a patient's condition by a specialist who has been requested to provide their expert opinion. In the scenario provided, a cardiologist conducts an evaluation to determine the surgical risk for a patient, implying a detailed analysis and professional judgment which is characteristic of a consultation.
The other options listed, such as tissue examination by the pathologist, interpretation of a radiologic study, and technical interpretation of an electrocardiogram, can also be critical in patient care. However, they generally represent diagnostic services or tests rather than consultations. A consultation typically involves more in-depth analysis and advice tailored to the patient's specific situation, often guiding the primary physician's approach to treatment. Therefore, the work of a cardiologist in assessing surgical risk is most aligned with the traditional concept of a consultation.