ABSTRACT
In poststernotomy redo cardiac surgery, injury to cardiac structures during sternal division can lead to untoward results in the operation. These days, Minimally Invasive Cardiac Surgery (MICS) such as the right anterolateral thoracotomy approach is becoming popular. By using MICS technique in redo cardiac surgery, it may be possible to reduce the risk of injury to the vital structures because of avoiding full sternotomy with the reduction of the dissection area. Six redo cardiac surgery cases in which innominate vein or bypass graft was in close contact with the sternum were is considered difficult to perform via the right thoracotomy approach. We report the cases in which operations were safely conducted through the lower hemi-sternotomy.
ABSTRACT
Medtronic Freestyle Stentless bioprosthesis as well as stented bioprosthesis, can lead to structural valve deterioration (SVD) or disruption of the porcine aortic root. Seventeen years ago, a 52-year-old woman with aortitis syndrome underwent aortic root replacement in a full-root fashion for aortic regurgitation (AR) with a Freestyle aortic bioprosthesis. A recent follow-up echocardiogram revealed severe AR due possibly to SVD. Thus, we planned an aortic valve replacement (AVR) for AR with possible leaflet tear of the prosthesis. Upon completion of AVR while the aortotomy was being closed, however, a disruption in the porcine aortic wall was found. Root replacement had to be performed because of this finding. In stentless valve reoperation long after AVR with the full-root method, both the porcine aortic root and leaflets can be disrupted. Aortic root replacement may be necessary if preoperative images reveal dilatation, as well as disruption of the sinus of Valsalva.
ABSTRACT
The following paper describes mitral valve replacement in a 48-year-old man. He had been perfectly well until he was brought to the emergency room because of fever and impaired consciousness. Computed tomography revealed subarachnoid hemorrhage. Magnetic resonance imaging showed multiple cerebral infarctions. Echocardiography revealed a large vegetation (25×20 mm) under his mitral valve and mild mitral regurgitation. He was treated with adequate antibiotics for several days. On the 11th admission day, his condition worsened dramatically. We found acute mitral regurgitation due to ruptured chordae. After IABP was inserted, an urgent operation was performed. After the operation, he improved gradually. He was discharged 50 days postoperatively in a satisfactory condition without any critical complications. This report describes an experience of successful operation for acute mitral regurgitation due to ruptured chordae in a patient who suffered from infective endocarditis complicated with preoperative cerebral infarction and subarachnoid hemorrhage.
ABSTRACT
A 79 year-old woman was given a diagnosis of acute myocardial infarction and was immediately transferred to our hospital by a helicopter. Cardiologists successfully revascularized the occluded left anterior descending artery which was considered to be the care of this case. After that, they detected a large ventricular septal perforation by transthoracic echocardiography. We performed repair of the ventricular septal perforation 4 days later, with a modified infarct exclusion technique. Residual shunt flow was not seen by echocardiography after the operation. This patient recovered uneventfully and was discharged on postoperative day 55.
ABSTRACT
A 72-year-old woman underwent a double aortic valve replacement with the Freestyle aortic bioprosthesis and subcoronary implantation with the Mosaic mitral bioprosthesis because of rheumatic multivalvular heart disease in 2000. During her annual follow-up, her Sinotubular junction was observed to have gradually increased in diameter on echocardiography and computed tomography. Therefore, 9 years after surgery we performed a reoperation for severe aortic regurgitation. Intraoperatively, the stentless bioprosthesis was found to be structurally intact. We believe that the dilation of the Sinotubular junction associated with a stentless bioprosthesis in the subcoronary position have caused her severe aortic regurgitation.
ABSTRACT
We encountered a rare case of a 75-year-old woman who fell into right ventricular failure and shock with a comparatively rapid course due to a huge primary right atrial angiosarcoma occupying the right atrium. An emergency surgical excision of the tumor was performed and the right atrium was reconstructed with an EPTFE patch under cardiopulmonary bypass. On account of the positive margin, postoperative radiotherapy was added. There was no local recurrence, but adjuvant chemotherapy was performed for multiple lung and liver metastases 14 months after surgery. Primary cardiac angiosarcomas are extremely rare and have dismal prognoses. Although a complete surgical resection is the cornerstone of treatment, multidisciplinary therapy may improve patient outcomes.
ABSTRACT
Vasculo-Behçet disease (VBD) is a special type of Behçet disease (BD) involving some vascular disorders like aneurysmal formation, arterial occlusion, and venous thrombosis in various vessels. VBD has a poor prognosis due to aneurysmal rupture or recurrence of vascular disorders despite optimal treatment. However, definite diagnosis in BD is made on the basis of clinical features, and early diagnosis is difficult. We report 2 patients whose first clinical symptoms were femoral-pseudoaneurysms. They received a diagnosis of VBD after surgery. The first patient was a 69-year-old man, who underwent autologous-vein patch closure of a perforated region in the left femoral artery. One year later, he had a pseudoaneurysm of the right profunda femoris artery, which was ligated. The second patient was a 51-year-old man, who underwent the interposition of the saphenous vein for defective artery due to left superficial femoral-pseudoaneurysm.
ABSTRACT
A 78-year-old woman underwent mitral valve replacement (MVR) with bioprosthesis in 1984. By 1997 the valve had become dysfunctional and was replaced with a Mosaic valve. Dyspnea on exertion occurred in 2005 and a systolic murmur was detected at that time. Echocardiography revealed severe mitral regurgitation (MR). The mitral valve was replaced for the third time. The explanted valve showed commissural dehiscence at the stent position and calcified leaflets. The mitral valve of a 70-year-old man was replaced with a bioprosthesis in 1986, and again with a Mosaic valve in 1997 because the original bioprosthesis had become dysfunctional. Seven years later, a systolic murmur appeared and echocardiography revealed severe MR. The valve was replaced for the third time. A leaflet tear was found in the removed valve. The Mosaic valve is a third generation porcine bioprosthesis that reportedly has excellent long-term durability. However, in these cases, the Mosaic valves deteriorated prematurely, and no obvious causes of this early structural deterioration could be identified. Continued long-term follow up is necessary, and the possibility of premature deterioration should be considered when selecting bioprostheses.
ABSTRACT
This study was designed to evaluate the optimal surgical treatment strategy for abdominal aortic aneurysm (AAA) coexisting with coronary artery disease (CAD). Twenty-six patients (21 men and 5 women with a mean age of 72.6±3.7 years old) who required surgical treatment of both conditions were examined. Eleven patients underwent a one-stage operation. Four of them had on-pump CABG and 7, including 3 high-risk-patients, underwent off-pump CABG. There were no operative mortalities, but 3 patients had severe morbidity (respiratory failure, acute renal failure, pneumonia). Fifteen patients underwent a two-stage operation. None of them had rupture of the AAA during the interval between the two operations, but 2 patients with large AAA (more than 6cm in diameter) required emergency operation due to impending rupture of the AAA. There was no operative mortality, but one patient suffered acute renal failure. One-stage operation for low-risk patients seems to be a safe and reasonable strategy. One-stage operation for high-risk patients should be performed cautiously, and off-pump CABG is especially useful in such patients.
ABSTRACT
A 34-year-old woman who was suffering from aortitis syndrome with annuloaortic ectasia (AAE) and severe aortic regurgitation (AR) from 18 years of age was admitted for an aortic root replacement. She has been on 5mg predonine daily. Aortography, CT and echocardiography examinations revealed dilated aortic annulus (D=30mm) and valsalva sinuses (D=43mm) and overstretched aortic valve leaflets. The ascending aorta was aneurysmal (D=50mm). Because of the patient's strong desire to have children, a Freestyle bioprosthesis was chosen for replacement. A collagen impregnated tube graft was interposed between the Freestyle and the proximal end of the transverse aorta. In order to reconstruct the coronary arteries, the Cabrol technique was utilized because of severe inflammatory adhesion of the aortic root. The patient had an uneventful postoperative course. This case shows that an aortic root replacement with Freestyle bioprosthesis offers a great benefit to those patients who are not suitable to receive postoperative anti-coagulation therapy to enable future pregnancy and child delivery.
ABSTRACT
A rare case of abdominal aortic aneurysm associated with crossed-fused ectopic kidney in a 74-year-old man is reported. On enhanced CT scans, the maximum diameter of his infrarenal aortic aneurysm was 55mm, and he lacked a right kidney. A crossed ectopic kidney was fused to the lower part of the left kidney. On preoperative examinations, only one feeding artery to the ectopic kidney separated from the right common iliac artery. However, laparotomy confirmed the presence of three aberrant renal arteries, the middle one of which was very slim. Aneurysmectomy and a bifurcated artificial graft replacement was performed. After proximal anastomosis, the two larger aberrant renal arteries were reconstructed under renal protection with intermittent infusion of cold Ringer's solution. The smallest aberrant renal artery was ligated. Postoperatively, this patient recovered without any complications. In operations for abdominal aortic aneurysm associated with renal anomaly including ectopic kidney, horseshoe kidney, and pelvic kidney, it is important to elucidate the anatomy of aberrant renal arteries preoperatively, and reconstruct as many of these arteries as possible. This report is apparently the fourth on abdominal aortic aneurysm associated with crossed ectopic kidney.
ABSTRACT
A 71-year-old woman was admitted with severe back pain. She was diagnosed of type A dissecting aortic aneurysm and two-vessel coronary disease by CT scan and angiography. An acute-phase operation was started 32 hours after onset, performing replacement of ascending aorta and a two-vessel bypass. The affected aortic wall was so thin and fragile that the cut ends of these wall were treated with 25% solution of glutaraldehyde, a fastacting crosslinking agent, for 7min. As a result, a sufficient degree of reinforcement was obtained to complete the anastomotic procedure safely. She made a good recovery of cardiac function after the surgery, but was left with such complications as permanent complete atrioventricular block and a little aortic regurgitation. Following pacemaker insertion she was discharged and has returned to her normal activity. It appears that when treating the affected aortic wall with glutaraldehyde, a piece of gauze placed in the left ventricular cavity stopped up the aortic valve by half. As a result, glutaraldehyde was perhaps transferred from the gauze to the aortic valve and a part of the conduction system, causing injury to them. If meticulous care is exercised during the procedure to avoid unnecessary invasion of surrounding tissues, this technique will provide a useful means to accomplish safe anastomoses of cardiac vessels.