0.05). However, we found that the proportions of low Qm (5) in the patients over 60 years were significantly higher than those in the patients younger than 60. [For low Qm, IMA: 13% (10/75) vs 2% (1/46), and GSV: 13% (33/259) vs 6% (7/123), ?2=4.296 and 4.422, P

ObjectiveTo summarize the method and experience of the model of rat heterotopic heart transplantation and to improve the rate of success of the experiment.Methods120 heterotopic heart transplantations were performed by Ono's way,including 60 prepared transplantations and 60 formal transplantations.ResultsRate of success of prepared transplantations was 45％,and formal transplantation was 85％.Mean time of formal operation was (74.3±17.1)min,removal time of the donor heart was (7.9±4.2)min,ischemia time was (29.6±10.3) min and the survival time of allograft was (11.1±5.7)days.5 of the recipients had a long-term survival,and the maximum weight was 740 g.ConclusionsGood surgical technique and rigorous perioperative management is very important in setting up the rat model of heterotopic heart transplantation.

Objective To evaluate the appropriate timing of coronary artery bypass grafting(CABG) with acute myocardial in- farction(AMI) and to discuss the influence of postoperative mortality on 30 days.Methods 233 patients after CABG were divided into 2 groups,AM/group and unstable angina (UA) group.There were 176 males (75.4%) and 57 females (24.5%).The mean age was (65.6?9.2) years(range 34～86 years).The mean grafts were 3.46?0.89.The complex risk elements between the 2 groups were analyzed to evaluate the independent risk element of death.Results Internal mammary arteries were used in 137 patients (58.8%).The postoperative mortality rate was 4.3 % (10/233).The operative mortality rates(OMR) were closely related to the in- creasing time intervals between AMI and CABG,for less than 3 days was 14.6% (6/41 cases),for 4 to 10 days was 2.7 % (1/37) and for 11 to 30 days was 0.The OMR of AMI less than 3 days has significant difference (P=0.033) comparing with that of unstable an- gina pectoris [2.3% (3/130) ].Conclusion Proper timing of CABG should be done in 3 days after AMI.

Objective:To explore the application and clinical efficacy of an innervated arterialised venous flap of the first dorsal metacarpal in reconstruction of thumb and finger pulp defects.Methods:From December 2021 to August 2022, 17 patients received surgery for reconstruction of thumb and finger pulp defects in the Department of Hand Surgery of Sichuan Modern Hospital. All were carried out in emergency surgery. The affected digits included: 3 thumbs, 4 index fingers, 6 middle fingers, 1 ring finger and 3 little fingers. After emergency debridement, a flap of the first dorsal metacarpal carrying superficial radial nerve and arterialised vein was taken for reconstruction of the defect. Donor site of the flap was directly closed with sutures. The survival and functional recovery of the digits and flaps were evaluated through postoperative follow-ups via outpatient visit and telephone and WeChat interviews.Results:Seven flaps developed blisters after surgery, which gradually subsided and healed after dressing change. The rest of 10 flaps survived smoothly, without any vascular compromise. All of the 17 patients(17 digits) had postoperative follow-up for 3-15 months, with 8 months in average. Appearance of thumb and finger pulps were good, with sensation restored to S 1-S 3+, according to the sensory function evaluation criteria of the British Medical Research Council(BMRC). According to Evaluation Trial Standards of Upper Limb Partial Functional of Hand Surgery of Chinese Medical Association, all 17 patientswere in excellent of total active movement(TAM). Conclusion:Innervated arterialised venous flap of the first dorsal metacarpal is reliable in reconstruction of the defects of digit pulps with good function and appearance. The flap is easy to take and with a satisfactory recovery of sensation.