| | | Heart and Circulatory Diagnostic Procedures | • | The General Examination You should have your heart checked more often as you age. Here's what to expect from your doctor. | | • | Blood Tests These include blood cholesterol, oxygen content and other tests. | | • | Chest X-ray A suspicious X-ray may be followed by other tests. | | • | Electrocardiogram (EKG) An electrocardiogram (EKG) is a painless recording of the heart's electrical activity. This electrical activity is first detected by small metal electrodes, which are placed on the patient's wrists, ankles and chest. | | |