Traumatic paraplegia is caused by a lesion of the spinal cord which occurs after a trauma, e.g. veebral fracture causing a puncture to the spinal cord. Any injury of the spinal cord may result in a condition known as autonomic dysreflexia (AD).. Autonomic dysreflexia can cause systolic blood pressure readings to increase by 20-40 mmHg. , this condition couples dangerously high blood pressure with decreased hea rates.nefidipine can be used for high blood preassures Ref Harrison20th edition pg 2378