ABSTRACT
Essential thrombocythemia is considered one of the chronic myeloproliferative disorders resulting in arterial thromboembolism, venous thrombosis, and bleeding tendency. We report a case of left ventricular aneurysm with successful treatment of the complications of this disease. A 66-year-old man who suddenly experienced right upper limb paralysis was carried to a nearby hospital. Computed tomography revealed multiple cerebral infarctions. An electrocardiogram confirmed findings of old myocardial infarctions in the anteroseptal wall. Echocardiography indicated a left ventricular aneurysm with mobile thrombus. The blood tests showed an abnormally high platelet count of 120×104/μl. His left ventricular thrombus showed an increasing tendency regardless of heparin administration ; thus, he was transferred to our hospital. The resection of the aneurysm and left ventricular restoration was performed emergently to avoid re-embolism. There was a soft thrombus inside the aneurysm at its apex. During cardiopulmonary bypass, the activated clotting time was not prolonged easily. We gave additional heparin and antithrombin III. The patient had no problem with hemostasis or postoperative bleeding. We started low-molecular-weight heparin from the second postoperative day and he was diagnosed with essential thrombocythemia by bone marrow biopsy. We started warfarin and aspirin on the fifth day after surgery. The number of platelets increased to 183×104/μl on the 8th day ; thus, oral administration of hydroxycarbamide was started. His platelet count fell to less than 100×104/μl around 3 weeks after surgery and he was discharged on the 34th day without new embolisms.
ABSTRACT
<p>A 41-year-old man had undergone mitral valve replacement (On-X 27/29 mm) and tricuspid valve replacement (TVR) (On-X 31/33 mm) for infectious endocarditis of the mitral valve and severe tricuspid regurgitation 6 years ago. Postoperative echocardiography showed aortic regurgitation and perivalvular leakage of the prosthetic mitral valve and left ventricular (LV) septal perforation. He therefore underwent aortic valve replacement (On-X 25 mm), patch closure of a leak around the prosthetic mitral valve, direct closure of the LV septal perforation, and re-TVR (On-X 31/33 mm). After discharge, he was placed on anticoagulant therapy with warfarin (international normalized ratio of prothrombin time target : 2.0-2.5). Transthoracic echocardiography three and -a half years after the operation revealed an increased mean tricuspid valvular pressure gradient (14 mmHg) compared with that seen on an echocardiograph of previous year. Cine-fluoroscopy showed almost no movement of the leaflets of the mechanical tricuspid valve. Tricuspid valve thrombosis or pannus formation was suspected. He was placed on thrombolytic therapy using tissue plasminogen activator (monteplase 1.6 million units). Five days later, cine-fluoroscopy showed movement of the mechanical tricuspid valve leaflets, and echocardiography revealed recovery of the mean tricuspid valve pressure gradient (4 mmHg). Valvular thrombosis was diagnosed as the cause of the non-moving valve. Hemorrhagic and embolic complications were not observed. Thrombolytic therapy was extremely useful.</p>
ABSTRACT
A 72-year-old man, in whom hypertrophic cardiomyopathy (HCM) had been treated with medication for 4 years, complained of general fatigue and mild dyspnea on effort. Transthoracic and transesophageal echocardiography revealed diffuse left ventricular (LV) hypertrophy and LV obstruction from the mid-portion to the outflow tract with a peak pressure gradient of 94 mmHg. Additionally, anterior displacement of the abnormal, hypertrophied anterior papillary muscle (PM) and restricted motion of the anterior mitral leaflet, caused by the shortened chordae arising from the abnormal PM, were found. Furthermore, during the systolic phase, the abnormal, hypertrophied anterior PM was shifted to the septal side, causing LV obstruction with systolic anterior motion of the mitral leaflet. The diagnosis was HCM with LV obstruction due to abnormal PM. Mitral valve replacement (MVR) using a mechanical valve and excision of the abnormal PM was performed. His postoperative course was uneventful, and he was discharged on the 14th postoperative day. Postoperative echocardiography revealed no residual obstruction and no pressure gradient in the LV, indicating that complete release of the LV obstruction had been accomplished. In cases of HCM with LV obstruction due to an abnormal mitral subvalvular apparatus, transaortic septal myectomy may not always be an effective procedure. Therefore, we propose that MVR with excision of the PM should be considered one of the useful surgical procedures for such cases.
ABSTRACT
A 62-year-old man with a history of insulin-dependent diabetes mellitus was admitted to our hospital because of a high-grade fever and general fatigue. Laboratory data showed evidence of inflammation and <i>Streptococcus pneumoniae </i>was identified in the blood cultures. Transthoracic echocardiography revealed vegetations on the right coronary cusp of the aortic valve and septal leaflet of the tricuspid valve, and an aorto-right ventricular fistula secondary to abscess formation in the aortic annulus. We diagnosed active infective endocarditis with an aorto-cavity fistula and performed an emergency operation. The infected tissue was curetted as much as possible and the fistulous openings in the right ventricle and aortic root were closed using bovine pericardial patches. We subsequently performed aortic annular reconstruction and aortic full-root replacement using a Freestyle<sup>®</sup> stentless valve. Although a permanent pacemaker was implanted to treat a complete atrioventricular block, the postoperative course was uneventful and the C-reactive protein level normalized. He was discharged on the 46th postoperative day. Postoperative echocardiography revealed no signs of valve dysfunction, recurrent endocarditis, or residual abscess cavity and shunt. Infective endocarditis with abscess formation complicated by a fistula formation between the cardiac chambers is rare, and surgical treatment for this is challenging. In such cases, both radical debridement of the infected tissue and precise closure of the fistulous tract are essential.
ABSTRACT
Recently, with the advent of medical devices and minimally invasive operations, endoscopic saphenous vein harvesting (EVH) in coronary artery bypass grafting has been widely accepted. Although EVH has short-term advantages of less wound morbidity and better cosmetic results compared with open vein harvesting (OVH), several studies have demonstrated that the mid- and long-term patency rate of EVH veins is significantly lower than that of OVH veins, therefore the role of EVH is currently controversial. The purpose of this study was to investigate the early results of EVH compared with the OVH group. Between April 2011 and December 2012, 115 consecutive patients underwent coronary artery bypass grafting (CABG) in our institution. Of these, EVH was performed in 62 patients and OVH in 53. In EVH groups, all 50 patients were men, and mean age was 71.3±7.8 years. A total of 211 coronary anastomoses, 109 SVGs anastomoses were assessed for patency postoperatively by angiography or enhanced computed tomography before discharge. The mean vein harvesting time was 26.0±8.1 min, and the mean number of ostial branch tear was 0.34±0.59. The overall SVG patency rates at discharge were 95.4% in EVH and 92% in OVH, respectively (<i>p</i>=0.24). There was a significant reduction in the incidence of leg wound complications in the EVH group (EVH : 1.6% ; OVH : 13.2% ; <i>p</i>=0.038). In conclusion, the short-term result of EVH was satisfactory. EVH reduces leg wound complications compared with OVH.