Objective To study balance function and surface electromyography (sEMG) activity of erector spinae (ES) and rectus ab-dominis(RA)in stroke patients.Methods From April,2015 to December,2016,17 stroke patients(test group)and 13 healthy subjects(con-trol group)were tested with balance platform:sitting with eyes open/close,with the platform swing of 10°,with trunk flexion and extension in maximum.The root mean square(RMS)of sEMG was recorded on both sides of ES and RA synchronously.The swing length and area of center of mass,the center of pressure on X and Y axes were also recorded as sitting with eyes open/close.Results For the test group,RMS of bilateral ES was significantly different as sitting with eyes open/close and with trunk flexion and extension in maximum (t>2.173, P<0.05).Compared with the control group,RMS of ES and RA in unaffected side increased as sitting with eyes open/close(t>2.175,P<0.05), as well as the swing length and area of center of mass(t>2.760,P<0.05).Conclusion The strength imbalance is found in ES in stroke pa-tients,which may associate with the balance function impairment,and need to be improved in rehabilitation.

BACKGROUNDST-elevated acute myocardial infarction (STEAMI) happening in the first month post percutaneous coronary intervention (PCI) is almost related to acute thrombosis or subacute thrombosis in-stents. This study aimed to investigate the possible causes of myocardial infarction one month later.

METHODSPatients who had a history of successful PCI, and received coronary angiography or re-PCI due to STEAMI were included in this study. The AMI-related lesions and previous angiographic findings such as the number of lesions, the degree of the stenosis, the type of stents and acute results of last PCI were recorded. If the AMI-related lesion was localized in-stents or at the edge of stents (distance apart from the edge < or = 5 mm), it was defined to be late thrombosis; otherwise as a new-lesion induced AMI.

RESULTSOne hundred and ninety-two patients aged 40 - 79 years were included in this study. New lesions, as the cause of STEAMI, were found in 144 patients (Group A, 75%), and late thrombosis in 48 patients (Group B, 25%). Almost all newly built thromboses were found at the sites of previous insignificant lesions (diameter stenosis < 50%). There was a significant difference in the average time from previous PCI to AMI ((30.1 +/- 12.4) vs (20.3 +/- 11.9) months) between the two groups. Diabetes mellitus (DM) and drug-eluting stent (DES) utilization were associated with markedly higher morbidity of late thrombosis in adjusted Logistic regression (hazard ratio (HR) 3.4, 95% confidence interval (CI) 1.1 - 10.9 and 5.3, 95% CI 1.1 - 26.5).

CONCLUSIONSSTEAMIs happening 1 month after PCI are more likely to develop from previous insignificant lesion rupture than from late thrombosis in-stents. Moreover, DM and DES are associated with the high incidence of late thrombosis, which may indicate that intensive antiplatelet therapy should be considered in patients with diabetes.

Adult ; Aged ; Angioplasty, Balloon, Coronary ; adverse effects ; Coronary Angiography ; Coronary Thrombosis ; etiology ; pathology ; Drug-Eluting Stents ; adverse effects ; Female ; Humans ; Male ; Middle Aged ; Myocardial Infarction ; etiology ; pathology

Objective:To study the presentation and changes of trunk flexors and extensors in isokinetic training at different velocities. Methods:From March to September, 2018, 27 health volunteers were enrolled. Their peak torques of trunk flexors and extensors at 30°/s, 60°/s, and 90°/s were collected. Results:The peak torques of trunk flexors and extensors slightly decreased with the increasing of velocities, but no significant difference was found (F < 2.070, P > 0.05). At 30°/s and 60°/s, the peak torque of extensors was higher than that of flexors (t > 3.138, P < 0.01); at 90°/s, no significant difference was found in the peak torque between flexors and extensors (t = -0.946, P > 0.05). The ratios of the peak torque of flexors to extensors were 0.79∶1 both at 30°/s and 60°/s. The peak torque of flexors decreased in the tenth contraction compared with the second contraction at all the angular velocities, however, it was significantly different only at 30°/s (t = 5.159, P < 0.01); meanwhile, the peak torque of extensors increased with significance only at 60°/s (t = -2.142, P < 0.05). Conclusion:At 30°/s and 60°/s, there might be a linear relation between trunk flexors and extensors, and the peak torque ratios of trunk flexors to extensors were approximately the same.