Percutaneous transcatheter closure of ostium secundum atrial septal defect (ASD) has become an alternative to conventional open surgical repair. Cardiac perforation is a rare complication after transcatheter closure of ASD by an Amplatzer Septal Occluder (ASO). We present a patient with hemodynamic collapse secondary to cardiac perforation occurring 5 months after placement of the ASO and discuss the complications of this device. A 14-year-old girl underwent transcatheter closure of ASD by the ASO in our institution. Transesophageal echocardiography showed ASD sized 17.4×15.0mm, with no aortic rim. The placement of the ASO was performed without complications, but 5 months after the procedure she started to complain of chest pain and subsequent syncope. She was brought to a local emergency department. Transthoracic echocardiography showed an important cardiac effusion with signs of cardiac tamponade. Emergency pericardial drainage was performed under echocardiographic control from the subxiphoidal region. Once she was hemodynamically stabilized, the patient was transferred to our institution immediately for the necessary emergency surgical procedure. The operation was performed through a median sternotomy and the bleeding source was identified. The left-side of the ASO disc had cut through the roof of the left atrium between the superior vena cava and the aortic root, creating a 5-mm perforation. There was another perforation at the aortic root in the region of the non-coronary sinus of Valsalva, approximately 5 mm. The metallic rim of the ASO could be easily seen protruding through the roof of the left atrium. Cardiopulmonary bypass was established and cardiac arrest induced. After opening the right atrium we found the ASO, which was positioned well. The ASO was removed and the perforations of the aortic root and the left atrium were closed with 5-0 polypropylene directly. Then the ASD was closed using an autopericardial patch. The patient was weaned off bypass without difficulty. The postoperative course of the patient was uneventful and free of neurologic events. Finally, we conclude that patients with an aortic rim defect may be at higher risk for device perforation. Such a patient should be carefully followed up by echocardiography.

A 23-year-old woman with mitral valve infective endocarditis complicated by embolism of the right common iliac artery underwent transfemoral embolectomy by a Fogarty catheter and mitral valve replacement. She developed occlusion of the right internal iliac artery, that was revealed by computed tomography on the 9th postoperative day. The occlusion was considered to result from migration of a part of the emboli from the right common iliac artery into the right internal iliac artery during the procedure of embolectomy. On the 16th postoperative day, she underwent repeat mitral valve replacement because of perivalvular leakage. Furthermore, after 2 weeks from the diagnosis of embolism of the right internal iliac artery, the embolic site showed aneurysmal formation finally requiring aneurysmectomy. Her recovery was uneventful. Our case is considered to be rare in that serial observations on computed tomography indicated the development of mycotic aneurysm at the site of septic embolism. In addition, care must be taken to prevent migration of emboli into branched arteries during the procedure of embolectomy for peripheral arterial septic embolism caused by infective endocarditis.

We report two cases of extended sandwich patch technique through right ventriculotomy for ventricular septal perforation (VSP). One was an 82-year-old woman. Preoperative coronary angiography showed occlusion of the left anterior descending artery proximal to the first major septal branch. Operative inspection revealed relatively extensive infarction of the anterior wall, a part of which had the appearance of free wall rupture. In the other case of an 85-year-old woman, the culprit lesion was occlusion of the left anterior descending artery distal to several septal branches and to the first diagonal branch. Despite their old age and emergency surgery in cardiogenic shock status, their postoperative recovery was uneventful. In the former case, however, echocardiography at the early postoperative phase revealed significant expansion and thinning of the infarcted anterior wall. Furthermore, serial observations showed deterioration of the left ventricular systolic function and mitral regurgitation due to leaflet tethering. In addition to secure VSP closure by transmural stitches, extended sandwich patch technique can offer geometric and functional preservation of postinfarction left ventricle. Although this can eliminate the risk of postoperative low output syndrome even if anterior infarction is extensive, late follow-up will be required because this technique can also allow postinfarction left ventricular remodeling.

Between January, 1975 and June, 1990, 67 patients underwent surgical treatment for infective endocarditis at our hospital. Of 67 patients, 27 patients showed active endocarditis at the time of operation. In these 27 patients, 20 had active endocarditis of the native valve (NVE), and the seven had active prosthetic valve endocarditis (PVE). The interval between onset of infective endocarditis and operation ranged from 7 to 252 days (mean, 36 days). In the operative results, 3 of 20 patients (15%) with NVE and 2 of 5 patients (40.0%) with PVE died before discharge from the hospital. According to analysis of preoperative hemodynamic state and bacteriological data, the determinant factors of operative mortality and morbidity were preoperative NYHA functional classification, the interval between onset of infection and operation, and annular destruction (annular abscess). Patient's age, preoperative renal function, positive blood culture, the site of infection, and positive culture or stain of the surgically excised valve did not play an important role to determine operative mortality and morbidity. It is our conclusion that all patients with infective endocarditis who develop progressive congestive heart failure and echocardigraphical extravalvular infection despite medical treatment, should have prompt valve replacement.

An 81-year-old man underwent aortic valve replacement with a 21-mm Medtronic Mosaic porcine bioprosthesis for the treatment of bicuspid aortic valve stenosis. In addition to the appearance of chest discomfort on effort and a new diastolic murmur, echocardiography performed 2 years and 3 months after the surgery showed a high pressure gradient across the bioprosthetic valve and a reduction in the valve orifice area. Prosthetic valve dysfunction was diagnosed. During a repeat operation, 2 large tears on the left cusp and a subvalvular overgrown abundant pannus were observed, and the bioprosthetic valve was replaced with a 19-mm On-X mechanical heart valve. On analysis of the explant bioprosthesis, the right non-coronary stent post was bent outwards by approximately 9°, it compressed the left cusp by pulling the left right and left non-coronary stent posts closer together, thus altering the leaflet geometry and function. We speculated that pannus formation had resulted from turbulent blood flow caused by impaired or altered leaflet function. The 2 large tears appeared to be the result of contact with the bias cloth secondary to the stent distortion.

Cor triatriatum is one of the rare congenital cardiac malformations and once the diagnosis is correctly established, this is amenable to surgical correction. We reported a case of 25-year-old male of cor triatriatum, who had symptomes of easy fatiguability. The diagnosis of cor triatriatum was suspected preoperatively by two-dimensional echocardiogram at first, detecting abnormal diaphragm in the left atrium, and it was confirmed by color Doppler echocardiogram and transesophageal two-dimensional echocardiogram. Cardiac catheterization revealed high pulmonary capillary wedge pressure and the abnormal diaphragm in the left atrium was showed by the pulmonary arteriography. On the operation, the abnormal diaphragm was excised by the trans-septal approach, which had a small fenestration of 8mm in diameter at posterolateral site. Some considerations for clinical diagnosis and surgical treatment are discussed.

A 53 year-old male with mitral valve aneurysm was presented. This patient, who had no episodes of rheumatic fever, was admitted with complaints of general fatigue, dyspnea and continuing high fever. Echocardiographic examination showed an abnormal echo behind the anterior leaflet of mitral valve, protruding into the left atrium during systole. Angiogram showed the same abnormal change of mitral valve and mitral regurgitation (MR) and aortic regurgitation (AR). We diagnosed as mitral valve aneurysm with MR and AR due to infective endocarditis. At operation, it was revealed that the aortic valve was destroyed, resulting in severe AR, and the anterior leaflet of mitral valve was a large aneurysm itself. Both valves were replaced with St. Jude Medical valve prosthesis. Postoperative course was good and with no complications. In Japan, 21 cases of mitral valve aneurysm were reported. We discussed the clinical course and the operative procedure for mitral valve aneurysm in this report.