ABSTRACT
Objective To investigate the clinical value of 2 dimension late Gadolinium enhancement MRI (LGE-MRI) technique for the evaluation of atrial myocardial fibrosis in patients with atrial fibrillation. Methods Forty-nine cases of atrial fibrillation in our hospital from March 2015 to December 2016 were retrospectively collected. The LGE-MR was acquired by the Siemens 3.0 T MR machine before the catheter ablation.The findings of LGE-MR were evaluated by two experienced doctors. The left atrium(LA)were manually segmented into 8 regions in axial view.All patients were classified into 4 stages based on the extent of enhancement, stage 0: absence of enhancement, stage Ⅰ: enhancement appeared in minimal two consecutive slices in single region,stageⅡ:enhancement in two regions,stageⅢ:enhancement in three or more regions. All electroanatomic maps were obtained after electrical conversion during catheter ablation. The Kappa test was used to assess the consistency of LGE-MRI left atrial myocardial fibrosis and CARTO system of the left atrial endocardial voltage reconstruction. Results Forty-nine cases of atrial fibrillation with LGE-MRI and CARTO were included. There were 17 cases of atrial fibrosis stage 0,10 cases of stageⅠ,11 cases of stageⅡ,11 cases of stageⅢaccording to LGE-MRI findings;There were 17 cases of atrial fibrosis stage 0,19 cases of stageⅠ,12 cases of stageⅡ,11 cases of stage Ⅲ with reference to CARTO findings. The diagnostic accuracy of the LGE-MRI atrial fibrosis was 81.6%(40/49),of which the correlation was good(Kappa= 0.751,P<0.001). Conclusions LGE-MRI can accurately assess the degree of left atrial myocardial fibrosis in patients with atrial fibrillation,help to select the proper candidate and strategy in catheter ablation.
ABSTRACT
Objective To investigate the anti-arrhythmias mechanism of nardostachyos chinensis batal by intracardiac electrophysiologic study. Methods Intracardiac electrophysiologic study were performed in 40 supraventricular tachycardia(SVT)patients before and after oral nardostachys chinensis batal administraton,and the results were compared with 35 SVT patients or normal persons without nardostachys chineusis batal intake. Results The atrial effective,relative,functional refractory periods(AERP,ARRP,AFRP)and ventricular ERP(VERP)were significantly longer in nardostachyos chinensis batal administration group than control(AFRP(358 ± 76)ms vs.(256 ±69)ms;ARRP(365 ±74)ms vs.(287 ±55)ms;VERP(264 ± 36)ms vs.(213 ± 27)ms respectively);but the sinus and atrioventricular node function had no changes. Conclusions The anti-arrhythmia mechanism of nardostachyos chinensis batal were related to the prolonged cardiac refractory periods and the reduced cardiac excitability.
ABSTRACT
Today,some doctors diagnose their sick persons not to watch,hear,ask or touch ,but to let them have some checks that they needn' t.The doctors depend on the technology of modern medicine completely.This is one of importance reasons for the expensive to seek medical care.The writer analyzed a few reasons of the formation,and put forword some ways for solving.
ABSTRACT
The vest mainly consists of thermogenic inner-bag and temperature control out-bag.Put the thermogenic reagent which main composition is metal-powder like iron and aluminium into inner-bag,and takes oxid- ation reduction reaction when meets oxygen in the air,and release the heat quality,The temperature is controlled dy the openness of out-bag. It is suitable for field operator and sufferer with backache end abdomenache.