Evaluation of telephone transmission for computer electrocardiographic interpretation in Japan

The reliability of the Japanese public telephone facilities to transmit electrocardiograms (e.c.g.) for computer interpretation was assessed. The International Business Machine's (IBM) e.c.g. computer program by Bonner was used. No appreciable distortion of e.c.g. was observed following repeated transmission from hospitals separated by 1000 km. Thirty-four normal and 66 abnormal e.c.g.s. were transmitted twice. Identical results were observed in 97% of normals and 92% of abnormals. Following these fundamental experiments, 1236 patients' e.c.g.s. were transmitted for computer intepretation. The study showed that 98·6% (1219 cases) were technically satisfactory and 1·4% (17 cases) were not. The 17 unsatisfactory cases were classified into ten unreceivable data formats, six inconsistent measurements and one unacceptable noise level. The authors concluded that the Japanese public telephone facilities were acceptable for the transmission of e.c.g.s. for computer interpretation.     

病窦综合征患者脑电图改变与动态心电图指标的相关性研究

目的 :探讨病窦综合征 (SSS)患者的脑电图 (EEG)改变及其与动态心电图 (AECG)指标的关系。方法 :10 2例SSS患者分别记录EEG和AECG ,其中 4 8例接受起搏治疗的患者在安装起搏器后复查EEG。 30例正常人在同期做EEG检查作比较。结果 :10 2例SSS患者EEG异常率为 37.2 % ,显著高于正常人 (χ2 =12 .814 4 ,P <0 .0 0 1)。晕厥组EEG异常率为 4 4 .4 % ,显著高于非晕厥组 (χ2 =5 .8778,P <0 .0 5 )。 4 8例接受起搏治疗的患者在起搏治疗后 ,EEG异常率显著下降 (χ2 =18.0 0 ,P <0 .0 0 1)。EEG异常程度与AECG最低心率呈明显的负相关 (r =- 0 .70 99,P <0 .0 0 1) ,与长间歇时间呈正相关(r=0 .5 4 0 1,P <0 .0 0 1)。结论 :SSS患者EEG异常程度与AECG最低心率及长间歇时间存在密切相关性。EEG检查对SSS患者病情及脑功能评估具有重要价值     

基于多分辨率分析的心室晚电位神经网络检测

采用多分辨率分析和人工神经网络相结合的方法实现对心室晚电位的检测。首先利用多分辨率分解技术提取高分辨率心电信号不同频带的能量构成一组特征值 ,再利用这些特征值训练BP神经网络 ,并完成对心室晚电位的识别。经过对 2 8例 3导高分辨率心电图实验数据的处理 ,取得了较高的识别准确率     

灵宝护心丹联合参松养心胶囊治疗窦性心动过缓的临床观察

目的 探讨灵宝护心丹联合参松养心胶囊治疗窦性心动过缓的临床疗效。方法 选取2019年3月—2020年12月抚州市中医医院内科诊断为窦性心动过缓患者100例,随机分为对照组（50例）和治疗组（50例）。对照组给予参松养心胶囊（每天3次,每次4粒）,治疗组在对照组的基础上给予灵宝护心丹（每天3次,每次4粒）,治疗24周。治疗后比较两组的临床疗效、24 h动态心电图指标、心率变异性时域指标及不良反应。结果 治疗组中医证候有效率84.0%,对照组为60.0%,两组比较差异有统计学意义（P<0.05）。治疗组动态心电图总有效率86.0%,对照组64.0%,两组比较差异有统计学意义（P<0.05）。治疗后,两组平均心率、总心率、最快心率、最慢心率、24 h全部正常心室搏动间距（R wave-R wave,R-R）间期标准差（standard diviation of NN intervals,SDNN）、24 h连续5 min节段正常R-R间期的标准差（standard deviation of sequential five-minute R-R interval means,SDA...     

人工神经网络预滤波的自适应运动心电信号增强器

运动心电图是一种将人体对象置于非平静状态下检测到的心电信号，其特点是运动导致基线严重漂移，肌电干扰显著增加，信噪比低。介绍了一种用人工神经网络预滤波的自适应运动心电信号增强器。运用人工神经网络的非线性和自适应处理的跟踪特性有机地结合设计而成。能降低噪声，提高信噪比，有效地提取运动心电信号。     

电话传送心电图监测与常规心电图诊断心肌缺血的应用比较

目的：探讨电话传送心电图检测（Ｔｒａｎｓｔｅｌｅｐｏｍｉｃ Ｅｌｅｃｔｒｏｃａｒｄｉｏｇｒａｐｈｉｃ Ｍｏｎｉｔｏｒｉｎｇ,ＴＴＭ）心肌缺血的诊断价值。方法：同步检测９７例心肌缺血患者的常规心电图（ＥＣＧ）、电话传送心电图（ＴＴＭ）,调整后者的监测电极与ＥＣＧ的电极部位完全相同,判断二者的Ｓ－Ｔ、Ｔ缺血变化。结果：ＥＣＧ发现９７例典型Ｓ－Ｔ、Ｔ心肌缺血患者,ＴＴＭ有９０例相同变化（敏感性９２．５％     

基于空洞卷积神经网络的心律失常分类算法

本文提出了一种基于卷积网络的心电信号分类算法,设计了空洞卷积池化金字塔模块,通过不同尺寸的空洞卷积提取信息,再将各通道的信息聚合,在增强网络的特征提取能力的同时可以降低参数量。本文聚焦于窦性心律、房性早搏、心动过速以及心动过缓4种分类,使用的心电图数据集来自医院的实测数据,数据集包含75000名不同检测者的心电记录。经过测试,本文提出的模型在该数据集上取得了0.89的F1值,另外在CinC2017数据集上也达到了0.87的F1值。实验结果表明该分类算法具有优秀的特征提取和分类能力,在心电信号的实时分类中具备应用前景。     

Q波型与非Q波型心肌梗死临床特点分析

目的探讨Q波型与非Q波型心肌梗死的临床特点;方法对29例无Q波型心肌梗死和81例Q波型心肌梗死临床资料和近期预后进行分析;结果两组相比死亡率为3．45％和13．6％,严重心律失常发生率为17．2％和40．7％,心力衰竭发生率为10．3％和37．0％,6个月生存率为93．2％和80．7％,没有再发缺血事件为87．9％和68．2％;结论和Q波型心肌梗死相比,无Q波型心肌梗死组并发症少,院内死亡率低,近期预后较好。     

心律平治疗室性及室上性心律失常疗效分析

目的 观察心律平治疗室性及室上性心律失常的疗效及副作用。方法 对于107例经心电图及临床确诊的室性及室上性心律失常患者，按口服心律平剂量不同分为：300mg／d组(33例)、450mg/d组(66例)、600mg/d组(8例)三组，10d为1个疗程；分析心律失常类型、心律平剂量与疗效的关系、副作用及原因。结果 心律平对室性及室上性心律失常总有效率分别为89．6％与79．7％(P＞0．05)；3种剂量与疗效关系不大(P＞0．05)；发生副反应19例，占17．8％，无效17例，占15.9％。结论 心律平对室性及室上性心律失常均；有良好治疗作用，较为安全。     

Effects of antihistamines,ebastine and terfenadine,on electrocardiogram in conscious dogs and cats

The purpose of this study was to evaluate the effects of ebastine and terfenadine on the electrocardiogram of conscious dogs and cats. In dogs, terfenadine at oral doses of 30 mg/kg twice a day for 7 days prolonged the electrocardiographic QT interval and the corrected QT (QTc) interval on the seventh day, whereas the drug did not affect these parameters on the first day. Plasma concentrations of terfenadine and its active metabolite, fexofenadine, reached 306 and 8,541 ng/mL, respectively, on the seventh day. Ebastine at oral doses of 30 and 100 mg/kg once a day for 7 days was without effect on the QT and QTc intervals, whereas the drug slightly shortened the RR interval. On the seventh day following the dose of 100 mg/kg, plasma concentrations of ebastine and its active metabolite, carebastine, reached 36 and 1,939 ng/mL, respectively. In conscious cats, terfenadine at oral doses of 30 mg/kg twice a day for 7 days prolonged the QT and QTc intervals, QRS duration, JT and the corrected JT intervals. Unexpectedly, terfenadine induced ventricular tachyarrhythmia and premature beats. On the other hand, ebastine at oral doses of 100 mg/kg once a day for 7 days was without effect on the electrocardiographic parameters in cats. These results suggest that the electrocardiographic changes indicative of the proarrhythmic potential of terfenadine can be evaluated in conscious dogs and especially in conscious cats by repeated oral administration, and that ebastine does not induce such changes. 58:209–217, 2003. © 2003 Wiley‐Liss, Inc.