A 61-year-old woman presented with loss of consciousness. Echocardiography revealed a hypoechoic, round mass of 12×13 mm with a smooth border in the left ventricular outflow tract, leading to a diagnosis of loss of consciousness caused by left ventricular outflow tract obstruction, and surgical excision of the mass was performed. The mass, with a smooth, elastic soft surface and filled with yellow, creamy contents, was observed within a range from the subannular region of the left coronary cusp to the anterior mitral leaflet. Pathological examination showed central degeneration and liquefaction, as well as cystic, coarse-granular calcium deposition surrounded by inflammatory cell infiltration and fibroblast proliferation. No tumor cells were seen. Abscess was excluded by preoperative clinical presentations, hematologic data, and culture testing, and thus the mass was considered as caseous calcification of the mitral annulus. Here, we report a case of caseous calcification of the mitral annulus, a rare nonneoplastic lesion thought to be a variant of mitral annular calcification, with literature review.

A 24-year-old man with systemic lupus erythematosus (SLE) had received long term steroid therapy 10 years prior to this admission. He presented with sudden-onset chest pain. Enhanced CT scan showed the presence of an aortic arch aneurysm 63mm in maximum diameter and a hematoma surrounding the anterior mediastinum. The diameter of the descending thoracic aorta was also dilated to 5cm. We performed ascending and total arch replacement on December 8, 2005. From the 11th postoperative day, he developed fever, indicating mediastinitis. Open drainage was carried out for one week resulting in gradual lysis of fever and the levels of WBC and CRP returned to normal values. The omentum was transplanted to close the defect in the mediastinum. The rest of the postoperative course was uneventful. He was discharged from the hospital last January 25, 2006. Although close medical follow-up was implemented, he had severe chest pain in the morning on June 9, 2006. Enhanced CT showed an expanding descending aortic aneurysm 60mm in diameter. Since antihypertensive therapy was effective, we considered an elective operation. On the 3rd hospital day, he complained of a severe back pain wherein he rapidly progressed into a state of shock. He died due to rupture of the descending aortic aneurysm. We needed emergency operation or endovascular stent graft therapy because of the risk of rupture.

We performed extraanatomic bypass from the thoracic aorta to bifemoral arteries for 4 aortoiliac occlusive disease (AIOD) patients (including 2 dialysis patients) with severe calcification of abdominal aorta and 5 high aortic occlusion (HAO) patients between January 2001 and September 2006. The average age was 69 years old (range 46-80) including 6 men. Two HAO cases were in the acute phase, one of whom had accompanying lower limb paralysis. Two of the AIOD cases showed small aorta syndrome. The mean operation time was 145min and intra- or postoperative bleeding was very low. We lost one peritoneal dialysis patient with AIOD in the 2nd postoperative week, due to infection from the CAPD tube. Perigraft seroma which is a complication of the artificial blood vessel itself was seen in 3 patients but graft patency was 100 percent at 2 years postoperatively.

We report an interesting case of thoracic vascular graft infection treated by in situ replacement using bovine pericardial roll. A 65-year-old man who had undergone graft replacement of ascending aorta for acute type A aortic dissection 9 months prior was admitted to our hospital with purulent discharge from his chest wound. Fluid accumulation surrounding the vascular graft was detected by chest CT, and methicillin-resistant Staphylococcus aureus (MRSA) was positive from his blood culture. These findings led to a diagnosis of aortic graft infection. We gave the antibiotics intravenously, opened the abscess cavity around the infected graft, and irrigated with 0.04% gentian violet solution for 6 months, but failed to control the graft infection. Then we did redo replacement of the ascending aortic vascular graft using a bovine pericardial roll graft with a concomitant omental flap wrapping and obtained successful healing of the graft infection. During follow-up, no recurrent infection occurred, however he died of acute subdural hematoma 8 months after surgery. In situ replacement of the infected vascular grafts using a bovine pericardial roll graft with a concomitant omental flap wrapping may be an option for treating infected aortic grafts.

Infected abdominal aortic aneurysm (IAAA) are rare, but life-threatening. This time we experienced six cases of infected abdominal aortic aneurysm. We measured the soothing of bacteremia by two weeks of antibiotic treatment before operation, if not in a state of impending rupture or rupture. The in situ prosthetic graft replacement surgery was the first choice. In five cases, we replaced by an in situ dacron graft with Rifampicin. However, one case that was by pondylitis caused by Helicobacter cinaedi was treated by extra-anatomical bypass. There was no post-operative infectious complication. In addition, surgery/hospital death was 0%.

A-54-year-old man with an extensive dissecting thoracic aortic aneurysm underwent staged surgery which consisted of preceding total aortic arch replacement with the frozen elephant trunk technique using J Graft Open Stent Graft, followed by open descending aorta repair. During the second operation, a Dacron graft was anastomosed directly to the stent graft and the true lumen thus, the true lumen could be preserved around the stent graft. We herein discuss our approach in this case, focusing on prevention of bleeding from the elephant trunk.

“Depolarized arrest”, induced by hyperkalemic (moderately increased extracellular potassium) cardioplegia is the gold standard to achieve elective temporary cardiac arrest in cardiac surgery. Hyperkalemic cardioplegic solutions provide good myocardial protection, which is relatively safe, and easily and rapidly reversible. However, this technique has detrimental effects associated with ionic imbalance involving sodium and calcium overload of the cardiac cell induced by depolarization of the cell membrane. Hence, the development of an improved cardioplegic solution that enhances myocardial protection is anticipated as an alternative to hyperkalemic cardioplegia. In this review, we assess the suitability and clinical potential of cardioplegic agents to induce “non-depolarized arrest” from the viewpoint of rapid cardiac arrest, myocardial protection, reversibility, and toxicity. “Magnesium cardioplegia” and “esmolol cardioplegia” have been shown to exert superior protection with comparable safety profiles to that of hyperkalemic cardioplegia. These alternative techniques require further examination and investigation to challenge the traditional view that hyperkalemic arrest is best. Endogenous cardioprotective strategies, termed “ischemic preconditioning” and “ischemic postconditioning”, may have a role in cardiac surgery to provide additional protection. The elective nature of cardiac surgery, with the known onset of ischemia and reperfusion, lends it to the potential of these strategies. However, the benefit of preconditioning and postconditioning during cardiac surgery is controversial, particularly in the context of cardioplegia. The clinical application of these strategies is unlikely to become routine during cardiac surgery because of the necessity for repeated aortic crossclamping with consequent potential for embolic events, but offers considerable potential especially if “pharmacological” preconditioning and postconditioning could be established.

This study investigated the effects of exercise intervention with a 12-week slightly-weighted shoe on lower-limb skeletal muscle and gait patterns in the elderly. A total of 29 healthy elderly Japanese who had irregular walking habits were randomly assigned to either slightly-weighted-shoe (WS group, n = 14; Age, 70.6 ± 5.7 years; WS, 493 g) or normal-shoe (NS group, n = 15; Age, 69.3 ± 6.9 years; NS, 293 g) intervention groups. The participants were instructed to maintain their normal daily physical activity (PA) during the intervention period. Segmental intracellular water (ICW) and muscle thickness (MT) were measured as an index of skeletal muscle mass in the lower limb, and kinematic gait data were acquired by motion analysis. Walking stability was assessed as a standard deviation of the vertical fluctuation in whole-body center of mass (COM fluctuation). The daily PA was monitored using an accelerometer and an activity record. ICW in the upper leg and MT of rectus femoris increased significantly in the WS group compared with the NS group (ICW: 13.8% vs. 2.2%, MT: 12.1% vs. 1.3%), while COM fluctuation was significantly reduced in the WS group (p<0.05) during normal walking. The present study demonstrated that interventions with a slightly-weighted-shoe may be able to increase muscle volume in the upper leg and change gait patterns in the healthy elderly.

A 76-year-old woman with a sudden onset of chest and back pain was admitted to our hospital. Computed tomography (CT) showed a giant thoracoabdominal aortic aneurysm. Therefore, the patient underwent emergency operation. Under a left anterolateral thoracotomy and pararectal laparotomy with left heart bypass, we performed graft replacement of the thoracoabdominal aorta and reconstruction of the celiac artery, superior mesenteric artery and renal arteries. The left lung was tightly adhered to the aneurysm because of the contained rupture. Copious pulmonary bleeding and air leakage occurred due to thrombectomy of the aneurysm. During the operation, critical air leakage was repaired using the remaining aneurysmal wall. The postoperative course was uneventful. The patient was discharged 16 days after surgery. Copious air leakage due to lung injury was a potentially life-threating condition in the postoperative course of this case of thoracoabdominal aortic aneurysm. Surgical treatment of critical air leakage due to lung injury is very important in thoracic surgery.

　　Hyperbaric oxygen (HBO) therapy for acute carbon monoxide (CO) poisoning is performed after oxygen therapy and breathing therapy. The usefulness of HBO therapy in emergency treatment has been reported. In this study, we examined the effectiveness of HBO for CO poisoning that was performed at our hospital over the past 5 years. Subjects were 23 patients who had HBO therapy for CO poisoning in the period January 2008-November 2013. The male to female ratio of the cases was 14:9 and the mean age was 54.6±20.8 years. The cause was suicide in 39.1% of cases and accident in 60.9%. The mean number of treatments was 5.4±6.8. The atmosphere absolute was 2ATA:2.8ATA=12:11. The ratio of direct conveyance of the patient to our hospital to indirect conveyance of the patient from another hospital was 15:8. The effectiveness of HBO therapy at the time of discharge was 73.9%. However, delayed neuropsychiatric sequelae (DNS) was detected in 3 of the 23 cases of CO poisoning. No correlations were found between elapsed time after CO inhalation and various blood parameters. However, time to start of therapy is important for DNS, and our results suggest that early treatment at a hospital with a hyperbaric chamber is necessary.