Enquire specifically about symptoms of:
Patients with pre-existing lung disease are more prone to postoperative chest infections, particularly if they are also obese, or undergoing upper abdominal or thoracic surgery. If an acute upper respiratory tract infection is present, anaesthesia and surgery should be postponed unless it is for a life-threatening condition.
Assessment of exercise tolerance
An indication of cardiac and respiratory reserves can be obtained by asking the patient about their ability to perform everyday physical activities before having to stop because of symptoms of chest pain, shortness of breath, etc.
The problem with such questions is that they are very subjective and patients often tend to overestimate their abilities!
Other conditions which are important if identified in the medical history: