A 14-year-old boy who underwent aortic valve-sparing operation for annuloaortic ectasia at the age of 9 was referred to our service with a diagnosis of acute type A aortic dissection. Emergency total arch replacement with the elephant trunk technique was done successfully and the postoperative course was uneventful. However, computed tomography (CT) 2 weeks after the operation showed a new dissection and enlargement in left subclavian artery and folded elephant trunk. Dilatation in coronary buttons were also seen since the time of surgery. No residual dissection was found in the aorta. Careful follow up is necessary for this case due to multiple aneurysmal changes and a new dissection lesion in a short period. Loeys-Dietz syndrome (LDS) is characterized by vascular findings (aortic aneurysm and dissection) and skeletal manifestations. Due to aortic dissection occurring in smaller diameter aortas in LDS patients than in Marfan syndrome, early and aggressive surgery is recommended for patients with LDS.

A 36-year-old previously healthy woman with cardiomegaly on a routine chest X-ray was given a diagnosis of primary chylopericardium after pericardial puncture revealed milky effusion. Endoscopy-assisted ligation of the thoracic duct and creation of a pericardial window was performed. The operation was greatly facilitated by the preoperative three-dimensional CT scan with lymphangiography that precisely demonstrated the distribution of the thoracic duct and other lymphatic ducts.

The authors experienced a case of fatal cerebellar, and brainstem infarction accompanying clamping of the left subclavian artery during operation for thoracic aortic aneurysm. Autopsy of this case revealed that right vertebral artery became markedly hypoplastic distal to the posteroinferior cere bellar artery, and left vertebral and basilar arteries were occluded by thrombus formation. These findings indicate that clamping of the dominant left subclavian artery is responsible for severe vertebrobasilar ischemia producing the fatal brain infarction. Since the occurrence of this devastating complication, we have performed pancerebral angiography and balloon occlusion test of the left subclavian artery in patients who might undergo proximal clamping of the aortic arch between the left carotid artery and the left subclavian artery during operations for thoracic aortic aneurysm. Selective perfusion of the left subclavian artery is then planned for those with abnormal vertebrobasilar communications producing neurological signs.

The results of our general and medical survey are summarized as follows:
(A) About Shinjo Spa
1) Most of visitors to this spa are residents of Yamagata Prefecture and engaged in agriculture.
2) In age they are 20 to 50.
3) Visitors who are few in number came to this spa for the purpose of spa treatment. Most of them visit this spa for recreation.
4) Most visitors take bath 2 to 3 times a day.
5) The bathing reaction and its effect are obscure, because most visitors do not stay here long enough for observation of the effect. It is, however, verified that this spa is effective in keeping the body father warm for a long time.
(B) About Niiyama Spa
1) Most visitors are residents of Yamagata Prefecture and those from neighboring prefecture are small in number. Half of visitors are farmers.
2) Most visitors are old in age, male and female visitors are almost equal in number.
3) The larger number of visitors come here for balneotherapy of or rehabilitation from diseases, especially neuralgia, rheumatism.
4) Most visitors are conscious of the good effect of bathing, but those who are conscious of thermal crisis are relatively few in number, being 9.8% of the total number of visitors.
The authors are indebted to the Pharmaceutical Section, Sanitation Bureau, Yamagata Prefectural Office and the Sanitation Section, Shinjo City Office for assistance given to the present survey, and to Shinjo and Niiyama Spa Associations for careful cooperation.

Left ventricular hypertrophy in patients with aortic valve disease has long been recognized as a significant risk factor for aortic valve replacement. Higher operative mortality in such patients has been attributed to poor myocardial preservation. In these patients improvement of left ventricular subendocardial blood flow during reperfusion seems to be mandatory to avoid subendocardial injury. Therefore, we attempted to increase subendocardial blood flow during reperfusion by terminal warm blood cardioplegia (TWBCP) followed by controlled aortic root reperfusion (CARR) in patients requiring isolated aortic valve replacement. The patients with TWBCP and CARR had a tendency towards severe left ventricular hypertrophy and more advanced NYHA function class compared to those with hypothermic cardioplegia alone. Nevertheless, the patients with TWBCP and CARR showed significantly better recovery of left ventricular function, i.e., spontaneous recovery of beating and higher cardiac index as well as left ventricular stroke work index, despite significantly less catecholamine support. These resuls suggest that TWBCP followed by CARR may offer significant benefits over unmodified reperfusion during aortic valve replacement for patients with severe left ventricular hypertrophy.

Thirteen cases of ruptured abdominal aortic aneurysm were treated during a period of 7 years and 5 months. In 6 cases, left thoracotomy was used before laparotomy to clamp the descending thoracic aorta. The merits and demerits of this method were evaluated in this study. It is useful for early improvement of cerebral and coronary circulation and prevention of sudden spurting hemorrhage, especially in cases with the previous laparotomies. On the other hand, this method has a shorter clamp time limit and requires much time in cases with pleural adhesions. It may increase the amount of operative bleeding and the incidence of postoperative respiratory insufficiency. It may also cause an intraoperative thoracic aortic dissection and rupture of thoracic aortic aneurysms if present. It is considered that this method is advantageous, but should be used only in selected cases.

We report the successful repair of impending rupture of a pseudoaneurysm of the brachiocephalic artery (BCA) in a 70-year-old man. He had undergone a mediastinal tumor resection through a median sternotomy in 1995. Pathological examination revealed non-Hodgkin's lymphoma. Two years later, he underwent radiation therapy of 65 Gray for metastasis to the supraclavicular lymph nodes. On January 18, 2000, plastic surgeons planned to perform a pectoralis major musculocutaneous flap to repair a radiation skin ulcer. During the operation, the BCA was lacerated, possibly in an area of radiation tissue damage. We performed a prosthetic graft (10-mm Gelseal^TM) replacement of the BCA. The right subclavian artery had to be ligated. Postoperative digital subtraction angiography (DSA) showed excellent reconstruction of the artery. Magnetic resonance angiography of the brain showed a deficit in the anterior communicating artery and stenosis of the posterior communicating artery, which indicated that the reconstruction procedure was reasonable. Seven months later, on August 18, 2000, the patient was transferred to our hospital because of swelling of the right neck and oozing from the previous cutaneous wound. CT scan and DSA demonstrated the presence of a pseudoaneurysm of the proximal anastomosis site, which required emergency surgery. Before this third sternotomy, a saphenous vein graft was interposed between both external carotid arteries. Removal of the prosthetic graft and resection of the pseudoaneurysm were performed under mild hypothermia and cardiopulmonary bypass with left common carotid arterial perfusion. Then, the wound was closed completely using a left pectoralis major musculocutaneous flap. The postoperative course was uneventful and DSA showed good patency of the graft and intracranial arteries. The patient was discharged without neurological complications. We conclude that prior reconstruction of the carotid artery is a safe and effective procedure for patients with aneurysmal changes in the BCA, especially in the case of re-operation.