ABSTRACT
The patient was a 50-year-old man who had undergone ascending aortic replacement and coronary artery bypass grafting at another hospital for acute type A aortic dissection 4 years before. He was diagnosed with hemolytic anemia 1 year after surgery for his progressive anemia and high serum lactate dehydrogenase level. He was referred to our hospital because frequent transfusion was required. A computed tomography showed severe kinking of the graft (110°), which we considered to be the cause of hemolysis. Peak pressure gradient was 60 mmHg. To remove the cause of hemolysis and to precipitate thrombosis of the residual false lumen, we performed re-ascending aortic replacement and total arch replacement with a frozen elephant trunk. The postoperative course was uneventful and hemolysis resolved soon after the operation. Surgeons should be aware that severe kinking of a Dacron graft can be a cause of hemolysis.
ABSTRACT
<p>A 58-year old man without Marfan syndrome was referred to our hospital for congestive heart failure due to severe mitral regurgitation. He had undergone sternal turnover with a rectus muscular pedicle for pectus excavatum 36 years previously. We were able to perform mitral valve repair via median sternotomy using a usual sternal retractor. There was no adhesion in the pericardium and the exposure of the mitral valve was excellent. We closed the chest in ordinary fashion without any problems in the fixation of the sternum or costal cartilage. There were no complications such as flail chest or respiratory failure.</p>
ABSTRACT
A 62-year-old woman was admitted to a regional hospital for acute myocardial infarction. Emergency coronary angiography revealed occlusion of the first diagonal branch, and transesophageal echocardiography showed severe mitral regurgitation due to anterior papillary muscle rupture. She was transferred to our hospital in a state of cardiogenic shock despite the use of high-dose catecholamine and intra-aortic balloon pumping. We immediately performed mitral valve replacement. The patient's postoperative course was uneventful and she was ambulatory when transferred to another hospital on foot on postoperative day 19. Physicians should be aware that fatal anterior papillary muscle rupture may be caused by isolated occlusion of the diagonal branch.
ABSTRACT
This study compared the hemodynamic performance of the Carpentier-Edwards PERIMOUNT Magna bioprosthesis (Magna) with the Carpentier-Edwards PERIMOUNT bioprosthesis (CEP) for aortic valve stenosis (AS). Between January 2005 and May 2010, 164 patients underwent aortic valve replacement for AS with either the Magna (<i>n</i>=68) or the CEP (<i>n</i>=96) at our institute. Patients undergoing a concomitant mitral valve procedure were excluded from this study. The 21-mm Magna and CEP prostheses were the most frequently used during this period. Transthoracic echocardiography was postoperatively performed within 2 weeks. The peak velocity (PV) of the Magna was significantly lower than that of the CEP (2.59±0.36 vs. 2.75±0.47 m/s ; <i>p</i>=0.022). The mean pressure gradient (PG) was not significantly different. For the 19-mm prostheses, the mean PG and PV of the Magna were significantly lower than those of the CEP [16.4±4.5 vs. 19.7±6.4 mmHg ; <i>p</i>=0.034 (PG) and 2.70±0.36 vs. 3.03±0.49 m/s ; <i>p</i>=0.008 (PV)]. The effective orifice area (EOA) of the Magna was larger than that of the CEP [19 mm : 1.29±0.18 vs. 1.11±0.24 cm<sup>2</sup> (<i>p</i>=0.007) ; 21 mm : 1.46±0.23 vs. 1.42±0.18 cm<sup>2</sup> (<i>p</i>=0.370) ; and 23 mm : 1.70±0.34 vs. 1.52±0.25 cm<sup>2</sup> (<i>p</i>=0.134)]. In this study, the EOA of the Magna was approximately 80% of that described in the manufacture's description. Patient-prosthesis mismatch (PPM ; EOA index≤0.85 cm<sup>2</sup>/m<sup>2</sup>) was seen in 26.8% of patients with the Magna and in 47.2% of patients with the CEP (<i>p</i>=0.018). Severe PPM (EOA index≤0.65 cm<sup>2</sup>/m<sup>2</sup>) was not seen in any patients with the Magna. The EOA of the 19-mm Magna was significantly larger and the mean PG was lower than those of the 19-mm CEP. Compared with the CEP, the Magna significantly reduced the incidence of PPM, and had superior hemodynamic performance.