Aspiration risk assessment of water-swallowing test in the occurrence of aspiration pneumonia in patients with cerebral infarction / 中国综合临床

Objective To investigate the effect of swallowing water test in the occurrence of aspiration pneumonia in patients with cerebral infarction. Methods One hundred and twenty?seven cases patients with cerebrovascular disease were randomly divided into two groups:swallow water group and control group,who were guided food program according to the result of swallow water test or experience. The number of two groups to use nasal feeding and the number of cases of the two groups occurred aspiration pneumonia in 3, 6 months were observed. Results The nasal feeding rate of swallow water group was higher than that of control group( 27. 6%( 21/76) vs. 11. 8%( 6/51) ,χ2=4. 590,P=0. 032) . After 3,6 months,the incidence of aspiration pneumonia of control group were higher than that of swallow water group(17. 6%(9/51) vs. 1. 3%(1/76),19. 6%(10/51) vs. 3. 9%(3/76),χ2=9. 080,6. 530,P<0. 05). Conclusion Water?swallowing test is a simple and practical method for assessment risk of aspiration pneumonia of patients with cerebral infarction,which is more effectively to reduce the risk of aspiration pneumonia than the empiric selection method of nasal feeding.

Detection of dystrophin gene mutation in a Chinese pedigree affected with Duchenne muscular dystrophy / 中华医学遗传学杂志

<p><b>OBJECTIVE</b>To identify mutations of dystrophin gene in a Chinese pedigree affected with Duchenne muscular dystrophy (DMD).</p><p><b>METHODS</b>Clinical data from the pedigree was collected. Subsequently, polymerase chain reaction and DNA sequencing analysis were applied to detect the potential mutations. Restriction enzyme digestion was carried out to determine whether the mutation was present in 118 healthy controls. Clustal software was applied for analyzing the conservation of altered amino acids.</p><p><b>RESULTS</b>DNA sequencing analysis has identified a heterozygous missense mutation c.7578G>C (p.Gln2526His) mutation in exon 52 of the dystrophin gene in the proband and his mother. The same mutation was absent in the 118 healthy controls. Restriction enzyme digestion has confirmed above result. Clustal analysis indicated that the altered amino acid is highly conserved in mammals.</p><p><b>CONCLUSION</b>The results revealed a novel missense mutation (c.7578G>C) of the dystrophin gene in DMD patients.</p>

Effect of Nicorandil on unstable angina patients with persistent weak positive for troponin-I / 心血管康复医学杂志

Objective:To discuss effect of nicorandil on unstable angina patients With persistent Weakly positive for troponin I (TnI).Methods:A total of 111 unstable angina patients With persistent Weakly positive for TnI Were randomly divided into control group (received routine treatment,55 cases) and intervention group (received nic-orandil 5mg,3 times/d based on routine treatment,56 cases).The relief of chest pain in one Week,the recurrent hospitalization for chest pain aggravation in 3 months and the cardiac mortality rate in one year betWeen tWo groups Were observed in tWo groups. Results:Compared With control group,the relief of angina pectoris in one Week (63.6% vs. 91.1%,χ2=11.97,P=0.0005)significantly increased,re-hospitalization for chest pain aggravation in three months (56.4% vs.19.6%,χ2=15.91,P=0.0001)significantly decreased in intervention group;but cardiac mortality rate during one year betWeen tWo groups Was no significant difference (5.5% vs. 8.9%,χ2=0.50,P=0.4792).Conclusion:Nicorandil can significantly reduce the unstable angina and re-hospitalization for chest pain aggravation in patients With persistent Weakly positive for TnI,but there Was no significant difference in reducing mortality Within one year betWeen tWo groups.

Influence of acute hypoxia on current of voltage-gated potassium channel in pulmonary artery smooth muscle cells of rats / 心血管康复医学杂志

Objective: To study influence of acute hypoxia on the current of voltage-gated potassium channel (IK) in pulmonary artery smooth muscle cells (PASMC) of rats. Methods: A total of 20 male SD rats were randomly and equally divided into normoxic control group and acute hypoxia group. The rats in acute hypoxia group were kept in hypoxic chamber for 8 h before experiment. Whole cell patch-clamp technique was used to record IK in PASMC. Results: Acute hypoxia significantly decreased the IK density in PASMC of rats. During -60mV to -10mV of resting membrane potential（RMP）, acute hypoxia did not significantly decrease peak IK density in PASMC of rats, P>0.05; At 0 mV, acute hypoxia significantly decreased the peak IK density in PASMC [from（38.1 ± 5.2） pA / pF decreased to（9.82 ± 2.1） pA / pF ,P<0.05], then along with RMP increase in PASMC, the decreasing amplitude of peak IK density in PASMC gradually increased（P<0.05）; From + 30 mV to+ 60 mV, the decreasing amplitude of peak IK density in PASMC further significantly increased（P<0.01）; At + 60 mV the peak IK density decreased from（38.1 ± 5.2） pA / pF to（9.82 ± 2.1） pA / pF , and the decreasing amplitude reached (46.8±3.3)%. Conclusion: Acute hypoxia can decrease Kv current in PASMC of rats, leading to hypoxic pulmonary vasoconstriction.

Evaluation of restenosis after PCI with stress echocardiography and stress SPECT / 心血管康复医学杂志

Objective: To study clinical application value of dobutamine stress echocardiography (DSE) and nitroglycerin stress single photon emission computed tomography (SPECT) for evaluation of restenosis after percutaneous coronary intervention (PCI). Methods: A total of 39 patients after PCI were examined by DSE and SPECT one week before coronary angiography (CAG). Dose incremental program of dobutamine included five levels：5μg•kg-1•min-1, 10μg• kg-1• min-1, 20μg•kg-1•min-1, 30μg•kg-1•min-1, 40μg•kg-1•min-1, and each level maintained for three minutes. Sensitivity, specificity and accuracy of DSE and SPECT were determined according to CAG examined result and examined results were compared between DSE and SPECT. Results: Compared with CAG, SPECT and DSE were no significant differences （P>0.05）in sensitivity (83.3% vs. 75.0%) and accuracy (71.8% vs. 87.2%) for evaluating restenosis after PCI, but compared with SPECT, DSE possessed higher specificity (66.7% vs. 92.6%). Conclusions: Dobutamine stress echocardiography is accurate, and its specificity is better than that of SPECT for evaluating restenosis after percutaneous coronary intervention.

Change of Transmembrane Potential During the Early Preconditioning Phase of Noradrenaline's Treatment / 医学研究杂志

Objective To investigate the change of transmembrane potential during Noradrenaline's early preconditioning phase and probe the mechanism of action.Methods Primary culture myocardial cell of neonate rat were divided into three groups at random.GroupⅠ is control group,Group Ⅱis treatment group by hypoxia,Group Ⅲ is treatment group by NA.Group Ⅰ didn't give any drug to culture for 40minutes;Group Ⅱ treated for 40minutes by hypoxia,Group Ⅲ exposed to Noradrenaline(0.2?g/ml)for 10 minutes then treated with hypoxia for 40 minutes.The fluorescence intensity of rhodamine-123 marked mitochondria were detected by flow cytometry.Results The fluorescence intensity of three Group were test by analysis of variance(F=461.3,P