A 69-year-old man had been treated with total arch replacement for acute Stanford type A aortic dissection. He had cardiac failure at 9 years after his previous operation. Computed tomography and transesophageal echocardiography showed re-dissection of the aortic root and aortic regurgitation. He was referred to our hospital for surgical treatment. In the second operation, aortic root replacement was performed. Re-dissection of the aortic root at the site of the non-coronary sinus was noted intraoperatively, and intraoperative findings suggested necrosis of the aortic wall related to the use of GRF glue. Care should be taken to ensure proper use of GRF glue. The aortic root replacement using a Freestyle valve provided good hemodynamic function and low thrombogenicity. The use of this valve in this case which had residual dissection of the descending aorta seemed useful because of the excellent hemodynamic function without anticoagulant therapy.

The Spontaneously Hypertensive Rats (SHR) are in the abnormal situation of the central nervous system, especially in that of the medulla oblongate and pons. By using the Amon point, studies were performed on the relationship between the blood pressure and the dosage, and on the effect of controling the blood pressure of SHR in the prehypertensive stage.
Material and Method
Males in two weeks after birth were divided in three groups (6-8 each) and given a stimulating moxibustion on the Amon point analogus to that of human to SHR. The amount of the stimulation were dosed by the moxa of 0.01g per 10g body weight (BW) in T₁ group that of 0.005g per 10g BW in T₅ group. The control group was free from stimuration.
Result
More generous rise in blood pressure was observed in the stimulated group, especially a favarable result in T₅ group, concerning body weight, both treated groups showed significantly low compared to that of the control untill 129 days after birth. The organ weight of the adrenal and the cerebrum was significantly high in both the treated groups compared to those of the control. By assay of serum catecholamine, adrenaline in T₅ group was significantly low.
Discussion and Conclusion
Stimulating moxibustion was effective to the development of hypertension in SHR in the prehypertensive stage. Histologically, in the lungs of the treated groups, expressly in T₅ group, less fibrirous inframmation was observed. The stimulation may be considered to enhance somehow immunity. The dosage of the stimulation was considered to be not parallel to its effectiveness.

STUDY DESIGN: Animal study. PURPOSE: To review the present warning point criteria of the compound muscle action potential (CMAP) and investigate new criteria for spinal surgery safety using an animal model. OVERVIEW OF LITERATURE: Little is known about correlation palesis and amplitude of spinal cord monitoring. METHODS: After laminectomy of the tenth thoracic spinal lamina, 2-140 g force was delivered to the spinal cord with a tension gage to create a bilateral contusion injury. The study morphology change of the CMAP wave and locomotor scale were evaluated for one month. RESULTS: Four different types of wave morphology changes were observed: no change, amplitude decrease only, morphology change only, and amplitude and morphology change. Amplitude and morphology changed simultaneously and significantly as the injury force increased (p<0.05) Locomotor scale in the amplitude and morphology group worsened more than the other groups. CONCLUSIONS: Amplitude and morphology change of the CMAP wave exists and could be the key of the alarm point in CMAP.
Action Potentials* ; Animals* ; Contusions ; Gravitation ; Laminectomy ; Models, Animal* ; Spinal Cord