Interactive cardiovascular and thoracic surgery
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Interact Cardiovasc Thorac Surg · May 2011
Case ReportsRobotic total endoscopic coronary artery bypass hybrid revascularization procedure in a patient with a preoperative tracheostoma.
Preoperative tracheostoma presents a significant risk of sternal wound complications, mediastinitis, stoma necrosis and tracheal injury in patients requiring cardiac surgery. Several approaches have been described to limit these risks. ⋯ Single left internal mammary artery grafting to the left coronary artery system was carried out successfully as the first stage of a hybrid revascularization and followed by percutaneous coronary intervention to the circumflex coronary artery. We regard this technique as the most minimally-invasive method of surgical coronary revascularization with a significant potential to reduce the risk of mediastinitis in patients with a tracheostoma.
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Interact Cardiovasc Thorac Surg · May 2011
Serum markers are not reliable measures of renal function in conjunction with cardiopulmonary bypass.
The present study explored the influence of haemodilution on estimates of the glomerular filtration rate (GFR) in conjunction with cardiopulmonary bypass (CPB) and cardiac surgery. Ninety-eight patients (n = 98) undergoing coronary artery bypass grafting with the aid of CPB were examined. The serum concentration of cystatin C and creatinine was analysed prior to surgery, after completion of CPB and in the intensive care the day after surgery. ⋯ For cystatin C, the GFR increased by 50.5 ± 2.5 ml/min (P = 0.000) and for creatinine based GFR with 22.5 ± 0.9 ml/min (P = 0.000) using the 4-variable modification of diet renal disease formula and with 22.1 ± 0.93 ml/min (P = 0.000) for the Cockcroft-Gault formula, respectively. Similar effects of haemodilution on GFR were also detected postoperatively. Haemodilution induced by CPB may therefore significantly overestimate the renal function as indicated by GFR based on serum markers.
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Interact Cardiovasc Thorac Surg · May 2011
Case ReportsThree-dimensional transesophageal echocardiography: diagnosing intraoperative pulmonary artery thrombus.
A 61-year-old patient with the diagnosis of acute heart failure based on severe mitral valve insufficiency due to chordae rupture was scheduled for surgery. Intraoperatively, a standard two-dimensional transesophageal echocardiogram (2D-TEE) examination, revealed severe mitral valve regurgitation due to a prolaps with chordal rupture and an echo dense structure in the pulmonary artery (PA). ⋯ On the basis of the clear demonstration on 3D-TEE of an at least 6-cm thrombus in the PA we decided to remove the thrombus prior to proceeding with the mitral valve repair. We conclude that 3D-TEE can alter surgical management and provide more valuable information on PA thrombus than that obtained by 2D-TEE.
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Interact Cardiovasc Thorac Surg · May 2011
Case ReportsRelapse of giant cell myocarditis supported with veno-arterial extracorporeal membrane oxygenation.
Giant cell myocarditis (GCM) is a fatal form of myocarditis that often presents with acute heart failure. An inflammatory infiltrate with giant cells and myocardial necrosis is characteristic. ⋯ We report a case of GCM relapse which was supported with veno-arterial membrane oxygenation until recovery. The patient is doing well one year after explantation.
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Interact Cardiovasc Thorac Surg · May 2011
Aortic valve replacement normalizes left ventricular twist function.
The aim of this study was to assess the effect of aortic valve replacement (AVR) on left ventricular (LV) twist function. We studied 28 severe aortic stenosis (AS) patients with normal LV ejection fraction (EF) before and six months after AVR. LV long axis function was assessed using M-mode and tissue Doppler and twist function using speckle tracking echocardiography. ⋯ This relationship was reversed in patients before ( r= 0.52, P < 0.01) and after AVR (r = 0.34, P = ns). In patients with severe AS and normal EF, LV twist is exaggerated suggesting potential compensation for the reduced long axis function. These disturbances normalize within six months of AVR but lose their relationship with basal LV function.