ObjectiveTo summarize the surgical experience of aortic regurgitation with lower ejection fraction (EF). MethodsWe retrospectively analyzed the clinical data of 34 patients with aortic regurgitation and lower ejection fraction received aortic valve replacement in the General Hospital of Shenyang Military Region between January 2012 and December 2013. There were 27 males and 7 females with age of 21-74 (51.03±12.06) years. All surgical procedures were performed under general anesthesia during cardiopulmonary bypass. ResultsThere was no operative mortality. Cardiopulmonary bypass time was 40-155 (60.92±22.89) minutes, aortic clamping time varied from 24 to 79 (37.12±12.61) minutes. Postoperative ventilator-assisted time was 4 to 67 (16.12±12.74) hours. The patients were discharged 8-15 (11.03±2.04) days after surgery. When discharged, EF value was 30% to 48% (41%±4%) and significantly improved compared with that before operation (P<0.01). Pulmonary artery systolic pressure varied from 33 to 50 (38.35±4.35) mm Hg and decreased significantly than that before operation (P<0.01). Left ventricular end-diastolic volume reduced to 168-380 (269.12±52.01) ml and obviously decreased than that before operation (P<0.01). ConclusionSurgical treatment can be carried out on patients with aortic insufficiency and lower EF. Treatment results are satisfactory.
Objective To compare milrinone （MIN）, Phenoxybenzamine （PHE），and mixture of nitroglycerin and verapamil(NVC) for the prevention and treatment of human radial artery spasm. Methods Residuary radial arteries from 30 patients undergoing coronary artery bypass grafting （CABG） using autologous radial artery from March to September of 2012 in General Hospital of Shenyang Military District were collected. All the artery specimens were cut into 60 vessel rings of 3 mm in width and hanged in the Organ-Bath. Using a random number table，all the vessel rings were divided into 4 groups：PHE group，NVC group，MIN group and blank group （control group）. Firstly，20 vessel rings were used for spasm relaxation experiment with 5 rings in each group. Phenylephrine was added into the Organ-Bath to reach final concentration of 10-3 mol/L in order to cause vessel rings spasm. PHE of 1 mmol/L，NVC of both 30 μmol/L，MIN of 30 μmol/L and Krebs-Ringer’s solution were added respectively into above groups to compare the relaxant effect of these vasodilators on radial artery spasm. Secondly，the other 40 vessel rings were used for spasm prevention experiment with 10 rings in each group. All the 40 vessel rings were dipped in above 4 groups. After 30 minutes，phenylephrine was added to the Organ-Bath to reach final concentration of 10-3 mol/L. Time-dependent constriction of the vessel rings were compared to examine the prevention effect of these vasodilators on radial artery spasm. Results In the spasm relaxation experiment, vessel ring spasm relaxed most quickly in NVC group （P＜ 0.01）. Vessel rings in MIN group relaxed more slowly but steadily （P＜ 0.05）. Vessel rings in PHE group relaxed most slowly （P＜0.01）. And there was no relaxation in the control group. In the spasm prevention experiment，vessel rings in the control group contracted （spasm） 100% immediately after phenylephrine administration. Vessel rings in MIN group contracted immediately after phenylephrine administration too，but slower than the control group（P＜0.01）. Vessel rings in NVC group did not contract right after phenylephrine administration，but the sedentary tension of these vessel rings gradually increased 120 minutes after phenylephrine administration，and vessel ring contraction reached 46.89% 240 minutes after phenylephrine administration. There was no vessel ring contraction in PHE group. Conclusions All the vasodilators in our experiment are effective for the prevention and treatment of radial artery spasm to different degree，but each medication has its own characteristics，vasodilatation result and time-dependent effect. NVC is most effective to dilate radial artery which has been in spasm state, while radial artery pretreated by PHE is least to become spasm after being stimulated.
Abstract： Objective To investigate the cause, treatment， and prevention strategy of early left ventricular rupture after mitral valve replacement （MVR）. Methods We retrospectively analyzed clinical data of 7 patients who had early left ventricular rupture after MVR， among a total of 2 638 MVR patients， between May 1981 and November 2010 in General Hospital of Shenyang Military District. There were 2 male patients and 5 female patients with their age ranging from 28 to 71 years old. One patient was New York Heart Association （NYHA） functional classⅡand 6 patients were NYHA functional classⅢ. Preoperative echocardiography showed that their left ventricular ejection fraction （LVEF） was 49%-60% and their left ventricular end diastolic volume （LVEDV） was 29-42 ml. All the patients underwent prothetic valve replacement under moderate hypothermia， general anesthesia and extracorporeal circulation. Results All the 7patients underwent surgical repair for their early left ventricular rupture. There were 2 patients with TypeⅠ， 4 patients with TypeⅡ， and 1 patient with TypeⅢleft ventricular rupture. Four patients died of hemorrhagic shock or low cardiac output syndrome. Three patients were successfully healed and discharged from hospital 7-15 days after the operation. The 3 surviving patients were followed up for 4.5-18.0 years, and they all had good general condition and satisfactory quality of life. No late pseudo-aneurysm was found during follow-up. Conclusions Early left ventricular rupture is difficult to repair with a high mortality. Effective prevention strategy should be applied to avoid it as much as possible. Once left ventricular rupture occurs during the surgery， extracorporeal circulation should be quickly established， and it’s possible to save patients’ life by reliable intracardiac and epicardial repair according to patients’ individual condition.
ObjectiveTo investigate acute physiologic and chronic health evaluation Ⅱ(APACHE Ⅱ) score system for severity evaluation and prognosis prediction of patients undergoing cardiac surgery. MethodsA total of 3 566 patients who were admitted in ICU after cardiac surgery in the Department of Cardiovascular Surgery of General Hospital of Shenyang Military between December 1, 2011 and August 31, 2013 were enrolled in this study. There were 1 873 males and 1 693 females with their average age of 45.8±23.7 years (range, 10 days to 82 years). All the patients were evaluated with APACHE Ⅱ and expected mortality was calculated. Receiver operating characteristic(ROC) curve was drawn to compare expected and actual mortality and evaluate predictive value of APACHE Ⅱ. ResultsA total of 3 373 patients survived the operation, and 193 patients died postoperatively with the mortality of 5.41%. The area under the ROC curve was 0.917 (P=0.000) with 95% confidence interval of[0.885,0.949]. The cut-off point of APACHE Ⅱ was 15.50, with a sensitivity of 80.3%,a specificity of 95.6%,an accuracy rate of 79.5%,a positive predictive value of 86.9%,and a negative predictive value of 93.1%. Expected and actual mortality increased with increasing APACHE Ⅱ,which were both positively correlated. ConclusionAPACHE Ⅱ score system can be used to evaluate severity and predict prognosis of patients undergoing cardiac surgery, which provides reference for rational utilization of ICU resource.