AIM:To investigate the distribution of protein Z intron FG79A polymorphisms in Chinese and the associations with coronary artery disease(CAD).METHODS:148 patients were performed selected coronary angiography and more than one major coronary vessel with at least 50% stenosis was defined as CAD.The control group consisted of 147 subjects.The protein Z intron FG79A polymorphisms were studied by polymerase chain reaction and restriction fragment length polymorphism and parts of PCR products were sequenced.RESULTS:Protein Z intron FG79A polymorphisms were first recovered in Chinese,and the frequencies of G and A alleles were 44.24% and 55.76%,respectively.The frequencies of two alleles were not significantly different between patients and controls.There was no significant difference in protein Z intron FG79A genotype distribution among patients with one,two or three stenosed vessels.No significant difference was found among the frequencies of the three genotypes between both acute coronary syndrome(ACS)and non-ACS.CONCLUSION:Protein Z intron FG79A polymorphisms are present in Chinese.Protein Z intron FG79A polymorphisms were not associated with CAD and ACS.

Objective To evaluate, the long-term results of pacemaker implantation in 122 elderly patients. Methods A long-term follow-up was carried out in 122 elderly patients (≥ 70 years old, elderly group)and 109 non-elderly patients (< 70 years old,non-elderly group)who received pacemaker implantation. The elinical characteristics, complications and quality of life were compared. Results The mean follow-up time was (8.22±6.01) years and (7.74±5.82) years respectively. The successful rate of the follow-up was 100%. The overall postoperative complications about pacemaker pocket and the prevalence of atrial fibrillation occurred in elderly group were higher than those in non-elderly group (4.10% vs 0, 21.31% vs 10.09%, P< 0.05).The heart function failure was the main cause of the death in elderly group. The stroke and uremia were the main causes of the death in non-elderly group. There was no significant difference in the improvement of the life quality in both groups (P>0.05). Conclusions The pacemaker implantation is a safe and effective therapy for treatment of elderly patients with bradyeardia, and can improve the quality of elderly patients' life. Optimal mode for elderly patients will be given according to the physiological characteristics and the types of bradycardia.

Objective To evaluate the feasibility and the safety of endoscopic closure for acute colon perforations with novel successive endoclips in animal model. Methods Approximately 1. 5 to 2 cm colonic full-thickness resections were created with an electrotome in 3 Ba-Ma pigs that were under general anesthesia and were closed with the conventional endoclips and novel successive endoclips respectively. The procedure time and the efficacy of each endoclip were recorded. After the procedure,the general condition and physiological indicators were carefully monitored. After a follow-up of 1 week,the pigs were euthanized for an endoscopic observation of the healing condition and the residual endoclips. A postmortem examination was performed to observe the abdominal infection and incision condition. Transverse sections of the colon across the site of perforation were taken for histopathologic examination to assess the healing process. Results All the colonic perforation models in three pigs were established successfully. Endoscopic closure for acute colon perforation with two kinds of endoclips was technically successful in all 3 pigs. The mean time of the procedure with successive endoclip was less than that with the conventional endoclip(54. 0 seconds VS 91. 9 seconds,P<0. 001),but the successful release rate of the successive endoclip was lower than that of the conventional endoclip without significant difference[62. 5%(15/ 24)VS 14/ 16,P= 0. 17].All the ani-mals survived without infection and hemorrhage. Five perforations demonstrated signs of healing,whereas one closed with the novel successive endoclips failed to heal completely. Conclusion Endoscopic closure for a-cute colon perforations with novel successive endoclips is effective and safe. The novel successive endoclip has the advantage of saving time,but it needs to be further improved and perfected to satisfy the clinical need.