The vertebral column is a collection of individual bones  called vertebrae that encase and protect thâ¦e spinal cord. The  vertebral column is divided into three parts: seven cervical (neck)  vertebrae at the top, twelve thoracic vertebrae in the midback, and  five lumbar vertebrae in the lower back.
Clopidogrel is used to prevent heart attacks and strokes in persons with heart disease (recent heart attack), recent stroke, or blood circulation disease (peripheral vascular disease).
To the Editor: The ACTIVE investigators report that the addition of clopidogrel to aspirin reduced the incidence of stroke, myocardial infarction, systemic embolism, and vascular death, as compared with aspirin therapy alone, in patients with atrial fibrillation.