超声心动图与心电图判定左室心肌梗塞部位和范围对比研究

目的:比较二维超声心动图(2DE)和心电图(ECG)对心肌梗塞(MI)定位诊断的异同、优劣。方法:对59例 MI 患者进行了2DE 和 ECG 检查。在2DE 上将左室分为16个节段而分别确定与 ECG 各导联的对应关系,分别计数2DE 上室壁运动异常(WMA)节段数和 ECG 上有异常 Q 波导联所对应节段数,对比分析两种方法检查结果的一致性。结果:2DE 和 ECG 分别检出338和311个节段阳性,两种方法阳性一致率57.9%,两种方法阳性一致率在各壁的高低依次为下壁、前壁、后壁、前间隔、侧壁;两种方法检测结果的差别有显著性(P<0.05);两种方法检测结果的相关系数 r=0.595(P=0.0000)。结论:两种方法的检查结果有较好的一致性,2DE 优于 ECG。     

心电图短P-R间期观测研究

目的：探讨和鉴别心电图短Ｐ－Ｒ间期的产生原因，为临床诊断、治疗提供依据。方法：检测１１５例受检者的常规导联心电图（ＲＬＥＣＧ）、头胸导联心电图（ＨＣＥＣＧ）、食管导联心电图（ＥＬＥＣＧ），对其中５５例临床可疑心律失常和ＲＬＥＣＧ示短Ｐ－Ｒ间期者行食管心房调搏电生理检查。结果：①Ｐ波出现率和振幅均值比较ＥＬＥＣＧ＞ＨＣＥＣＧ＞ＲＬＥＣＧ（Ｐ＜０．０１），出现率分别为１００％、９５％、９１％。②ＨＣＥＣＧＰ－Ｒ段均值（Ｐ＜０．０１）及变异系数＜ＲＬＥＣＧ。③ＲＬＥＣＧ波幅低、图形多变是产生心电图短Ｐ－Ｒ间期的主要原因。结论：作为无创伤性检查方法，ＨＣＥＣＧ和ＥＬＥＣＧ可以对短Ｐ－Ｒ间期者进行初步筛选，而经食管心房调搏能检测ＥＣＧ短Ｐ－Ｒ间期的电生理特性，对鉴别诊断有肯定价值。     

可穿戴式心电、呼吸传感器与检测系统的研制

叙述了一种可用于移动条件下对重要生命信号（心电、呼吸等）无损检测的可穿戴式传感器及其测量和传输系统的研制。导电纺织面料缝合在普通背心内侧特定位置上作为检测电极，通过缝在背心上的导电纺织线将电极上的信号引出到背心边缘，再连接到信号测量和传输系统，由其中的单片机和激励、放大和处理电路测量心电、心率、呼吸数据，通过RS232串口、蓝牙等通讯方式传送到PC机上，用Visual Basic编写的程序接收并显示图形和数据。     

ECG信号的时频分析

ECG信号是最主要的生物信号之一,它反应了心脏的活动,单用时域或频域的方法不能够很好地研究心电问题,只有利用时频方法对正常或不正常病人的ECG信号进行识别和分析.时频计算中采用了迭代的去卷积算法.这种方法用于时频分析领域,可以提高信号的分辨率.其优点是能够指示信号的非平稳行为和观测到任何瞬时现象,特别对非正常信号,其结果有利于分析心脏问题.     

心电导联线检测盒的研制

根据维修需要研制了一种心电导联线检测盒，能使心电导联线的每根线在电路中分别形成回路，通过LED指示其通断。实践证明这种检测盒简单实用，可显著提高心电导联线的维修效率。     

心电图机抗干扰能力试验方法

阐述了心电图机抗干扰能力试验的必要性,提供了按照医药行业标准YY 1139—2000检验心电图机抗干扰能力的原理和方法。通过对多种型号心电图机抗干扰能力的试验,验证了自制试验装置的可靠性和实用性。     

A Prospective Evaluation of the Electrocardiographic Manifestations of Hypothermia

OBJECTIVE: To determine the effects of body temperature, ethanol use, electrolyte status, and acid-base status on the electrocardiograms (ECGs) of hypothermic patients. METHODS: Prospective, two-year, observational study of patients presenting to an urban ED with temperature < or =95 degrees F (< or =35 degrees C). All patients had at least one ECG obtained. Electrocardiograms were interpreted by a cardiologist blinded to the patient's temperature. J-point elevations known as Osborn waves were defined as present if they were at least 1 mm in height in two consecutive complexes. RESULTS: 100 ECGs were obtained in 43 patients. Presenting temperatures ranged between 74 degrees F and 95 degrees F (23.3 degrees C-35 degrees C). Initial rhythms included normal sinus (n = 34), atrial fibrillation (n = 8), and junctional (n = 1). Osborn waves were present in 37 of 43 initial ECGs. Of the six initial ECGs that did not have Osborn waves present, all were obtained in patients whose temperatures were > or =90 degrees F > or =32.2 degrees C). For the entire group, the Osborn wave was significantly larger as temperature decreased (p = 0.0001, r = -0.441). The correlation between temperature and size of the Osborn wave was strongest in six patients with four or more ECGs (range r = -0.644 to r = -0.956, p = 0.001). No correlation could be demonstrated between the height of the Osborn waves and the serum electrolytes, including sodium, chloride, potassium, bicarbonate, BUN, creatinine, glucose, anion gap, and blood ethanol levels. CONCLUSIONS: The presence and size of the Osborn waves in hypothermic patients appear to be a function of temperature. The magnitude of the Osborn waves is inversely correlated with the temperature.     

56例晕厥动态心电图分析

目的为探讨动态心电图对晕厥病因诊断价值。方法对56例患者行1次或多次24h动态心动图检查,并嘱患者在检查中尽可能诱发晕厥发作,记录其发作时心电图变化。结果56例患者经动态心电图检出各种心律失常24例,占42．86％,其中检出室性心动过速5例,占8．9％,缓慢性心律失常5例,占8．9％。结论动态心电图检查可有效检出心源性晕厥,其简便的诊断方法为临床上防止心脏性猝死提供可靠的诊治依据.     

ECG—^6511 6501型心电图机走纸电机驱控系统分析

讨论了走纸电机驱控电路工作原理和故障分析,附给各关键点波形和直流测试电位及特殊器件测量参数。     

A Digital Module for Cardiac Pacemaker Assessment

The accuracy of a digital pacemaker testing module incorporated into a digital recording electrocardiograph has been tested against two other methods of waveform recording. Measurements of rate (pulse interval), pulse width, pulse amplitude and ratio of trailing edge to the leading edge amplitude were found to be highly accurate. The pulse shapes were faithfully recorded. The practical clinical use of the method is discussed.