Surgical repair of an aortoesophageal fistula after salvage thoracic endovascular aortic repair: a case report.

BACKGROUND: An aortoesophageal fistula can prove to be fatal. Salvage thoracic endovascular aortic repair as a bridging therapy and radical surgery with thoracotomy should be considered while treating aortoesophageal fistula without spontaneous closure. Moreover, it is essential to select a technique that reduces the risk of reinfection. Here we report a rare case of a ruptured thoracic aortic aneurysm related to esophageal perforation by a fish bone that led to massive hematemesis and shock, and the surgical treatment of an aortoesophageal fistula that developed after salvage thoracic endovascular aortic repair. CASE PRESENTATION: A 70-year-old Japanese female patient was admitted with hematemesis, thoracic pain, and shock related to esophageal perforation of a ruptured descending aortic aneurysm caused by fish bone aspiration and esophageal perforation 1 month previously. An emergency thoracic endovascular aortic repair was performed. Postoperatively, an aortoesophageal fistula that remained open and a food intake-related increase in the inflammatory response was noted. Radical blood-vessel prosthesis implantation and fistula closure were performed. The patient's postoperative course was favorable and the patient was discharged 22 days after the blood vessel prosthesis implantation. CONCLUSION: Such a case of rupture of a descending aortic aneurysm related to perforation by a fish bone and an aortoesophageal fistula is considerably rare. Thus, we report the therapeutic strategy of this particular case and review the relevant literature.

Surgical strategy of IgG4-related inflammatory abdominal aortic aneurysm with preoperative steroid therapy: A case report.

Immunoglobulin G4 (IgG4)-related disease, characterized by high serum IgG4 concentrations and IgG4-positive plasma cell infiltration, often presents as an inflammatory aneurysm. We herein report the case of a 78 year-old man, presenting with elevated inflammatory markers and IgG4 concentrations, who was diagnosed with IgG4-related inflammatory abdominal aortic aneurysm with dense perianeurysmal fibrosis. Before the surgical intervention, steroid therapy was administered to resolve his perianeurysmal inflammatory fibrosis. Half a year after the initiation of steroid therapy, there was an improvement in serum inflammatory markers and IgG4 concentrations, and the perianeurysmal fibrosis had regressed. Thus, we performed a surgical intervention including resection of the aneurysm and interposition with a prosthetic graft. Histopathological examination demonstrated few IgG4-positive plasma cells were distributed in the adventitia, which was suspected to be associated with the preoperative steroid therapy. This case study suggests preoperative steroid therapy is a useful therapeutic strategy for IgG4-related abdominal aortic aneurysm because it allows the use of open surgical procedures with reduced surgical risk.

Surgical Management of Incidental Profunda Femoris Artery Aneurysm: A Case Report.

Profunda femoris artery aneurysm is a rare vascular disorder, which is often diagnosed incidentally on identification of synchronous aneurysms. Herein, we report the case of a 63-year-old man, presenting with a hepatic cyst, who had left profunda femoris artery and left internal iliac artery aneurysms. We performed surgical intervention, including resection of the aneurysm and reconstruction of the profunda femoris artery using a prosthetic graft. The postoperative course was uneventful, and computed tomography revealed good graft patency. We believe surgical reconstruction of the profunda femoris artery should be completed except in complicated cases, such as rupture or aneurysm in the distal segment of the profunda femoris artery.

Peripheral Inflammatory Superior Mesenteric Artery Aneurysm Diagnosed by Intraoperative and Histological Findings: A Case Report.

Although rare, superior mesenteric artery aneurysms (SMAAs) are life-threatening due to their high rupture rate. We herein report a case involving an 80-year-old man who presented with acute cholecystitis and who was incidentally found to have a 36-mm peripheral SMAA. A surgical intervention was performed, involving resection of the SMAA and reconstruction of the superior mesenteric artery (SMA) using an autologous vein graft. Intraoperative and histological findings indicated an inflammatory aneurysm, and the postoperative course was uneventful. We believe that resection of the aneurysm and reconstruction of the SMA is the preferred procedure for SMAAs to maintain adequate mesenteric circulations.

Undifferentiated intimal sarcoma mimicking a mycotic aneurysm.

Intimal sarcoma of arteries is a rare malignant tumor, which often mimics other vascular disorders; therefore, preoperative diagnosis is often challenging. We herein report a 71-year-old man who presented with fever and elevated inflammatory markers who had a mass in the left internal iliac artery with rapid growth. Based on clinical findings, a diagnosis of mycotic aneurysm was made. We performed surgical intervention, including resection of the affected vessels with omentopexy, although intraoperative findings were not typical of a mycotic aneurysm. Microscopic and immunohistochemical examination demonstrated undifferentiated intimal sarcoma. The patient died of multiorgan failure two months after the surgery. The vascular surgeon should consider the possibility of a diagnosis of intimal sarcoma for patients with atypical findings and the importance of histological and immunohistochemical examination for precise diagnosis in surgical vascular cases.

[Congenital Unicuspid Aortic Valve Diagnosed by Intraoperative Findings].

A unicuspid aortic valve is an extremely rare congenital aortic valvular abnormality. We herein present 2 cases of unicuspid aortic valve diagnosed based on intraoperative findings. In case 1, a 75-year-old man was admitted to our hospital because of severe aortic regurgitation. We performed aortic valve replacement using a bioprosthetic valve, and a unicuspid aortic valve was definitively diagnosed according to the intraoperative findings. In case 2, a 54-year-old man developed dyspnea due to severe aortic stenosis. Aortic valve replacement using mechanical valve was performed, and we were able to diagnose unicuspid aortic valve intraoperatively. Achieving a preoperative definitive diagnosis of congenital unicuspid aortic valve by transthoracic echocardiography is reportedly difficult;however, transesophageal echocardiography may be effective for preoperative definitive diagnosis.

Intravascular ultrasound for transcatheter paravalvular leak closure.

Transcatheter closure of paravalvular leaks requires precise assessment of the location, size, and shape of the defect. Transesophageal echocardiography plays an important role in this process. We encountered a case of a paravalvular leak at the aortic position after aortic and mitral valve replacement. It was impossible to detect the precise location of the paravalvular leak with transesophageal echocardiography because of an acoustic shadow from the mitral mechanical valve. Intraoperative use of intravascular ultrasound was useful for determining the morphology of the defect and evaluating the procedure during the operation.

Transcatheter closure through transapical access for mitral paravalvular leak after previous trans-septal mitral operation.

Because paravalvular leak after mitral valve replacement in highly morbid patients is a troublesome issue, there has been a growing interest in less invasive procedures. We conducted transcatheter paravalvular leak closure of a mitral valve prosthesis through left ventricular apical access. The patient had undergone redo mitral valve replacement through a transatrial septal approach 2 months prior to the procedure; thus, penetration of the atrial septum was considered to be difficult through the ordinary antegrade trans-septal approach. Transapical access for the mitral paravalvular leak was conducted using two AMPLATZER Vascular Plugs (St. Jude Medical, St. Paul, MN), with a route directed straight to the defect. This approach is an alternative technique for transcatheter paravalvular leak closure. This is the first case report of transapical access for transcatheter paravalvular leak closure in Japan.

Effect of negative pressure wound therapy followed by tissue flaps for deep sternal wound infection after cardiovascular surgery: propensity score matching analysis.

OBJECTIVES: Deep sternal wound infection (DSWI) after cardiovascular surgery via median sternotomy remains a severe complication associated with a drastic decrease in the quality of life. We assessed the risk factors for in-hospital death caused by DSWI and the available treatments for DSWI. METHODS: Between January 1991 and August 2015, we retrospectively reviewed 73 patients (51 males and 22 females, mean age 67.5 ± 10.3 years) who developed DSWI after cardiovascular surgery via median sternotomy. Pathogenic bacteria mainly comprised methicillin-resistant Staphylococcus aureus (MRSA) (49.3%). Fifteen patients (20.5%) died in hospital with DSWI. Treatment of DSWI consisted of open daily irrigation (up to 2006) or negative pressure wound therapy (NPWT) (2007 onwards), followed by primary closure or reconstruction of tissue flaps. We assessed the risk factors for in-hospital mortality from DSWI by comparing data from the 15 patients who died and the 58 survivors using propensity score matching analysis of the treatments used for DSWI. RESULTS: Univariate analysis identified age, use of intra-aortic balloon pumping, prolonged mechanical ventilation, tracheotomy, prolonged intensive care unit stay, postoperative low output syndrome, postoperative myocardial infarction, postoperative renal failure, postoperative use of haemodialysis, postoperative pneumonia, postoperative cerebral disorder, MRSA infection, NPWT and tissue flaps as being associated with in-hospital mortality (P < 0.05). Multivariate analysis identified NPWT (odds ratio, 0.062; 95% confidence interval, 0.004-0.897; P = 0.041) and tissue flaps (odds ratio, 0.022; 95% confidence interval, 0.000-0.960; P = 0.048) as independently associated with reduced in-hospital mortality after DSWI. On comparing 22 patients receiving NPWT with 22 not on NPWT using propensity score matching, patients on NPWT had significantly lower in-hospital mortality than those without NPWT (NPWT vs non-NPWT, 5 vs 36%, P = 0.021). In DSWI infected by MRSA, NPWT significantly reduced the in-hospital mortality caused by DSWI (NPWT vs non-NPWT, 0 vs 52%, P = 0.003). CONCLUSIONS: NPWT and tissue flaps may be favourable factors associated with reduced in-hospital mortality attributable to DSWI. NPWT as a bridge therapy to tissue flaps may play a major role in treating DSWI and improve the prognosis for patients with MRSA-infected DSWI.

Right Axillary Artery Cannulation in Aortic Valve Replacement.

OBJECTIVE: This retrospective study aimed to evaluate the results of our experience with axillary artery cannulation via a side graft in aortic valve replacement in patients with ascending aortic atherosclerotic disease. METHODS: From January 2002 to 2012, we operated on 76 patients for aortic valve disease with the use of the axillary artery for arterial inflow in our institute. The indications for cannulation of the axillary artery were aortic aneurysm in 37 patients, severe aortic atherosclerosis in 28 patients, and re do surgery in 11 patients. RESULTS: Right axillary artery cannulation via a side graft provides sufficient antegrade aortic flow of 2.6 ± 0.1 L/m(2) during cardiopulmonary bypass. No additional arterial cannulation was necessary to obtain sufficient perfusion during cardiopulmonary bypass. Although permanent perioperative stroke was observed in two patients, this did not occur during the operation. There were no problems with cannulation or wound and graft infections. During the follow-up period, there were no thrombotic events due to an axillary graft stump in the right upper extremities. CONCLUSIONS: Axillary artery cannulation via a side graft is a useful and safe option for cardiopulmonary bypass in patients with atherosclerotic disease of the ascending aorta undergoing aortic valve replacement.

Efficacy and Safety Evaluation of Tolvaptan on Management of Fluid Balance after Cardiovascular Surgery Using Cardiopulmonary Bypass.

Background: Tolvaptan is an orally administered selective vasopressin 2 receptor antagonist that promotes aquaresis. This study aimed to evaluate the efficacy and safety of tolvaptan on management of systemic fluid balance after cardiovascular surgery using cardiopulmonary bypass. . Methods: Sixty-four patients who underwent cardiovascular surgery using cardiopulmonary bypass in our hospital were enrolled for this prospective, randomized study. These patients were divided into three groups: tolvaptan 15 mg+furosemide 20 mg (TH group), tolvaptan 7.5 mg+furosemide 20 mg (TI group), and furosemide 40 mg+spironolactone 50 mg (C group). The endpoint was safety management of systemic fluid balance using tolvaptan without renal dysfunction and electrolyte imbalance. Results: The mean daily urine output in the TH and TL groups (2656±767 and 2505 ±684 mL) was significantly higher than that in the C group (1956±494 mL, TH vs C: p<0.01 and TL vs C: p=0.03). The lowest serum sodium level during medication in the TH group (139.3 ±2.3 mEq/L) was significantly higher than that in the C group (137.1±2.9 mEq/L, p=0.03) The lowest serum osmolality during medication in the TH group was significantly higher than that in the C group (284.8 ±4.3 vs 279.5± 6.3 mOsm/kg, p<0.01). None had critical hypernatremia, hyperosm6lality, or renal dysfunction in any. of the groups. Conclusions: Tolvaptan exerts, a strong diuretic effect compared with conventional diuretics (furosemide and spironolactone) during the postoperative period after an operation using cardiopulmonary bypass without adverse effects on electrolyte balance and renal function.

[Surgical treatment for pseudoaneurysm of the sinus of valsalva ruptured into the right atrium after mycotic right coronary artery aneurysm repair;report of a case].

A 67-year-old man was admitted to our hospital by ambulance after syncope due to complete A-V block. He had received surgical treatment for mycotic aneurysm of the right coronary artery 3 months before, with patch plasty of the right sinus of Valsalva and bypass grafting to the right coronary artery (RCA) as well as the left anterior descending branch. Computed tomography revealed pseudoaneurysm of the right Valsalva sinus of about 8 cm in diameter and a shunt flow to the right atrium. The previous bypass graft to RCA had been occluded due to compression by the aneurysm. As he was in a shock state, emergency operation was performed. Cardiopulmonary bypass was first established, and after the rectal temperature reached to 26 degrees centigrade, the chest was opened. The pseudoaneurysm burst out when the sternum was re-opened. Under circulatory arrest, the ascending aorta was clamped, and then the circulation was resumed. The previous bovine pericardium patch repairing the Valsalva sinus was detached due to infection, and mural thrombus and pus were observed in the aneurysm. At the bottom of the aneurysm, a fistula connected to the right atrium was found. Debridement around the aneurysm was performed as much as possible. The defect of the Valsalva sinus was repaired with a Dacron patch immersed in gentian violet. The postoperative course was uneventful without any recurrence of infection.

Successful surgical treatment of traumatic transection of the innominate artery: a case report.

Blunt traumatic injury to the innominate artery is relatively rare. We present the case of a 40-year-old woman who fell from a fourth-floor window and was transferred to our hospital with multiple injuries, hemodynamic shock, and disturbance of consciousness. Computed tomography with image reconstruction revealed transection of the innominate artery near its origin. Emergent surgery required establishment of cardiopulmonary bypass before sternotomy in preparation for uncontrollable hemorrhage. Proximal aortic arch replacement with a branch to the right axillary artery was successfully performed using circulatory arrest and selective cerebral perfusion.

Quadricuspid aortic valve complicated with infective endocarditis: report of a case.

Congenital quadricuspid aortic valve is a rare cardiac malformation with an unknown risk of infective endocarditis. We report a case of quadricuspid aortic valve complicated with infective endocarditis. A 53-year-old Japanese woman was hospitalized with leg edema and a fever of unknown origin. Corynebacterium striatum was detected in the blood culture. Echocardiography demonstrated a quadricuspid aortic valve with vegetation and severe functional regurgitation. The condition was diagnosed as a quadricuspid aortic valve with infective endocarditis, for which surgery was performed. The quadricuspid aortic valve had three equal-sized cusps and one smaller cusp (type B according to Hurwitz classification). We dissected the vegetation and infectious focus and implanted a mechanical valve. Following the case report, we review the literature.

Does rich coronary collateral circulation distal to chronically occluded left anterior descending artery compete with graft flow?

OBJECTIVES: In coronary artery bypass grafting (CABG), graft flow distal to a mild stenosis can compete with relatively preserved native flow through the stenosis and the competition can result in graft stenosis. In chronic total occlusion (CTO), coronary collateral circulation, which is essential to maintain myocardial viability distal to CTO, varies in extent among patients and the extent can be scored by Rentrop grade in coronary angiography. We investigated whether rich collateral circulation distal to CTO competes with distally anastomosed graft flow in association with Rentrop grade. METHODS: Of 666 patients who underwent CABG from January 2001 to December 2012, 70 patients whose left internal thoracic artery (ITA) was grafted distal to CTO in the left anterior descending artery (LAD) were divided into three groups: Poor collaterals (Rentrop grades 0 and 1, Group P, n = 22), Moderate collaterals (grade 2, Group M, n = 23) and Rich collaterals (grade 3, Group R, n = 25). The intraoperative measurements of mean graft flow (MGF) and pulsatility index (PI) of left ITA grafts, early graft patency and long-term clinical outcomes were compared. RESULTS: The MGF and PI of left ITA grafts differed significantly among the three groups (P = 0.025 and P = 0.046, respectively). Lower Rentrop grade was associated with preferable results of higher MGF and lower PI. The graft flow pattern in Group P showed a significantly higher MGF (P = 0.020) and lower PI (P = 0.041) than those in Group R. All early postoperative coronary angiograms showed patent left ITA grafts. Serial echocardiographic evaluations, survival rates and cardiac event-free rates were comparable with the follow-up of 5.00 ± 3.11 years. CONCLUSIONS: Rich collateral circulation distal to CTO in LADs can potentially compete with graft flow, although the competition seems not to affect clinical outcomes probably due to the regression of collaterals surmounted by the graft flow. Rentrop grade is shown to certainly reflect the degree of collateral haemodynamic circulation distal to CTO and especially important to evaluate intraoperative graft flow appropriately, considering the possible phenomenon of graft flow competition.

[Axillo-axillary bypass for coronary-subclavian steal syndrome].

We describe a case of coronary-subclavian steal syndrome in a 77-year-old man who presented with progressive coronary ischemia 8 years after coronary artery bypass grafting with an in-situ left internal thoracic artery graft. Coronary and left subclavian artery angiogram revealed completely patent internal thoracic artery graft and 90% stenosis in the proximal left subclavian artery. We performed axilloaxillary artery bypass using expanded polytetrafluoroethylene (ePTFE)[8 mm] graft. No coronary ischemia was noted postoperatively. Axillo-axillary artery bypass grafting was effective for coronary subclavian steal syndrome.