Objective　To investigate the changes of free triiodothyronine (FT3) and its therapeutic effects on heart dysfunction after thoracic trauma.　 Methods　Eighteen rabbits were assigned randomly into 3 groups. The rabbits in Group A were served as a control, that in Group B were shot at the left thoracic wall passing through the cardiac region with small diameter rifle, that in Group C were treated by FT3 into veins (10 ng/kg) after thoracic trauma. 　Results　In Group B, MAP was much lower than that in Group A after trauma (P<0.05). In Group B, LVEDP and CVP respectively was much higher than that in Group A. Plasm concentration of cTnT in Group B was much higher than that in Group A. But level of FT3 was in Group B decreased more markedly than that in Group A after trauma. In myocardial interstitium, many red cells were leaked out of vessel. In Group C, MAP was much higher than that in Group B, no significant difference was found. CVP and LVEDP in Group C were much lower than that in Group B. Level of FT3 was near to normal and much higher than that in Group B. Edema of myocardial cells and hemorrhage of myocardial interstitium were alleviated markedly. 　Conclusions　Rabbits shot dead at the left thoracic wall passing through cardiac region with small diameter rifle can contribute to an animal model establishment of heart dysfunction. Reduction of FT3 is in correspondence with heart dysfunction. Correcting thyroid sick syndrome after trauma can improve significantly the heart function.

Objective To summarize the feasibility of the application of the self-made bipolar venous cannulae to repair atrial septal defect(ASD)totally through thoracoscope in children.Methods Twenty-eight children,aged 4.2?1.3 years in average and weighed 14.6?3.9kg,were diagnosed as congenital ASD.Among these patients 3 were complicated by moderate to severe pulmonary hypertension,4 by partial pulmonary venous teratosis and 3 by tricuspid valve insufficiency.During the operation,patients were placed in a supine position,and the right shoulder was padded 30? higher than the left.A tracheal cannula was inserted and air was given with high frequency jet ventilation.Three small thoracotomies with a diameter of 2 to 3 cm were made in the 4th intercostal space on the right side of the sternum and the 4th and 7th intercostal spaces on the right middle axillary line.The cardiopulmonary bypass(CPB)was set up through the right femoral artery and femoral vein with bipolar femoral venous cannulae.The ASD was repaired through the thoracoscope.Results In all the 28 patients,the mean extracorporeal circulation time was 53.5?17.8min,and cross-clamp time was 25.2?7.9min.Automatic heart beat recovered after the declamping of the aorta in all the patients.No serious complication occurred.Heart murmur vanished,and ultrasonic examination was negative.Half a year after operation,ECG showed that the size of right ventricle and right atrium became maller in size,the diameter of pulmonary artery diminished,and the cardiac function was improved(P

0.05).Compared with group A,the aortic occlusion time,ventilation time and the length of stay in ICU were shorter in groups B and C(P0.05)were found between group B and C in the aortic occlusion time,ventilation time and length of stay in ICU.Conclusion TTS is a safe and reliable surgical madality for the treatment of pediatric cardiac diseases.Patients weighed over 20kg are strong enough to withstand TTS and may recover sooner.

0.05),while the levels of IL-8 and IL-6 declined,but were still significantly higher than that at immediately after induction of anesthesia(P

To promote the understanding and practice of evidence-based medicine (EBM) in coronary artery bypass grafting (CABG). The transition of CABG graft materials from saphenous vein to arterial conduits were perceived using the principles of EBM. The arterial conduits were increasingly performed based on the principles and practice of EBM, therefore the postoperatively long-term graft patency rate, survival rate, and free cardiac event rate were significantly improved. CABG outcomes can be significantly improved by using arterial conduits based on principles of EBM.

Objective To investigate the clinical features and surgical management of giant coronary artery aneurysm due to mucocutaneous lymph node syndrome(Kawasaki disease).Methods From May 2006 to Oct.2007,5 patients with giant coronary artery aneurysm were undergone surgical correction.The aneurysm mainly appeared in the left bole of coronary artery and the right coronary artery.The ST segment of electrocardiogram changed in 5 cases,cardiac ejection fraction reduced observably in 4 cases,and 1 case suffered from cardiac dysfunction.Coronary angiography showed that the right coronary artery was entirely occluded and ventricular wall motion was depressed in one case.During operation,4 cases were undergone thrombus clearing,endoarterectomy and replasty of coronary artery(with additional procedure of stent placement in one case),one case was undergone coronary artery bypass grafting(CABG) with the aneurysm sequestration.Results The surgical results were satisfactory.No operative death occurred,and all the patients recovered uneventfully and were free of symptoms.In 4 cases,the ST segment of electrocardiogram showed that the blood supply of ischemic myocardium was improved,and the cardiac ejection fraction increased obviously.With 2 to 18 months following-up,all patients were free of symptoms with no death or coronary artery aneurysm recurrence.Conclusions For stage 3 Kawasaki disease complicated with giant coronary artery aneurysm,surgical procedure is necessary.The cardiac function can be improved greatly after comprehensive treatment of thrombus clearing,endoarterectomy,replasty of coronary artery and CABG.

Objective To study the cytotoxicity of the membrane material of heart assist pump. Methods The membrane materials tested incladed polyurethane (group A) and medical polychloroethylene (group B),and a blank control group with none of the material. L-929 cells (the mouse fibroblasts) were cultured on either material in groups A and B,and 6 cell cultures were without any material. After 24,48 and 72 hours,the growth of cell in groups A,B and the control was observed,and the number was counted. Educts of two materials used in groups A and B was respectively added to culture medium,then the OD was measured every 24h and proliferation rate was determined by MTT test. Results L-929 cells grew very well in groups A and B with less death. The cell counts showed no difference between 2 groups at each time. The OD of group A was always higher than that of group B after 24,48 and 72h ( P

Objective To evaluate the safety and efficacy of transcatheter closure of perimembranous ventricular septal defects(VSD) using domestic symmetric double-disk occluders.Methods From March 2003 to July 2007,689 VSD patients were treated with transcatheter intervention using domestic symmetric double-disk occluders and received clinical follow up at 1 month,3 months,6months after the procedure and annually thereafter.Complications including residual shunt,heart rhythm changing,shape of the occluder and the presence of tricuspid/aortic regurgitation were observed thoroughly.Results The overall technical success rate was 98.8%.One patient died of cerebral bleeding 7 days after intervention.One patient suffered complete A-V block and required permanent pacemaker implantation and another patient conversed to open surgery because of moderate tricuspid regurgitation.Asymmetric Amplatzer occluders were used in 6 patients but the intervention failed in 2 patients whom required an open conversion.Comorbidities such as atrial septum defect,patent foramen ovale were treated concomitantly.No other complications were observed during the follow-up period.Conclusion Complication associated with transcatheter closure of perimembranous VSD using domestic symmetric double-disk occluders was relatively low.The procedure was safe and applicable.Meanwhile,it is necessary to stick to the procedural indications and avoid complications such as tricuspid regurgitation etc.

TMPRSS3 (transmembrane protease, serine 3) is a member of Ⅱ transmembrane serine proteases (TTSPs), and like the other members of this family, it contains typical domains including a serine protease domain, a transmembrane domain, a LDL receptor-like domain (LDLRA), and a scavenger receptor cysteine-rich domain (SRCR). Four alternative protein isoforms have been described, and isoform A is thought to be primary isoform which is expressed in many tissues, especially in the cochlea. TMPRSS3 protein is primarily localized in the endoplasmic reticulum membranes where it may be anchored by its transmembrane domain. TMPRSS3 is mutated in non-syndromic autosomal recessive deafness (DFNB8/10). Therefore TMPRSS3 is thought to be involved in the development and maintenance of the inner ear, and isoform D may be proposed as a novel diagnostic marker in ovarian carcinoma. TMPRSS3 protein is the first protease which mutation could lead to deafness. These data indicate that important signaling pathways in the inner ear are controlled by proteolytic cleavage. However, it is not clear about TMPRSS3 substrates and its function. The epithelial amiloride-sensitive sodium channel (ENaC) which is regulated by membrane-bound channel activating serine proteases (CAPs), a member of TTSPs, may be a potential substrate of TMPRSS3, but this hypothesis is still to be verified in vivo. With the development of protease research and the application of protease proteomics, substrate degradomes of a protease may therefore represent an important tool for the research of TMPRSS3 function and its molecular mechanism.

Objective:To investigate the effect of neonatal dog peripheral mononuclear cells on left ventricular function, haemodynamic, and infarcted size when transplanted into infarcted myocardium. Methods: Mononuclear cells from neonatal dogs were isolated and purified. The descending coronary arteries of adult dogs were ligated and the cells were injected into the border zone of the infarcted region. The control group was injected with non serum culture medium. Left ventricular pressure, d p /d t max , and power of LV were measured during and 30 d after operation. Echocardiogram(HP Sonos 5500, 2.5 MHz) were performed promptly and 30 d after operation to determine the changes of left ventricular function. Infarcted size, capillary density and cardiac muscle width were measured 30 d after operation. Results: LV pressure decreased in both groups, there were no marked differences between the 2 groups. LV pressure and d p /d t max of transplant group were greater than those of control group 30 d after operation. The systolic and diastolic functions were preserved after mononuclear cell transplantation. Infarcted sizes were lower and capillary density was greater in transplant group than those of control group. Conclusion: Transplantation of neonatal dog peripheral mononuclear cells into the infarcted regions can increase the capillary density and decrease infarcted size, preserving left ventricular function.