AIM:To determine if there were any interactions between cardiac devices and small bowel capsules secondary to electromagnetic interference (EMI) in patients who have undergone small bowel capsule endoscopy (SBCE).METH...AIM:To determine if there were any interactions between cardiac devices and small bowel capsules secondary to electromagnetic interference (EMI) in patients who have undergone small bowel capsule endoscopy (SBCE).METHODS:Authors conducted a chart review of 20 patients with a cardiac pacemaker (CP) or implantable cardioverter defibrillator (ICD) who underwent continuous electrocardiographic monitoring during their SBCE from 2003-2008.authors searched for unexplained electrocardiogram (ECG) findings,changes in CP andICD set parameters,any abnormality in transmitted capsule data,and adverse clinical events.RESULTS:There were no adverse events or hemodynamically significant arrhythmias reported.CP and ICD set parameters were preserved.The majority of ECG abnormalities were also found in pre-or post-SBCE ECG tracings and the CP behavior during arrhythmias appeared appropriate.Two patients seemed to have episodes of undersensing by the CP.However,similar findings were documented in ECGs taken outside the time frame of the SBCE.One patient was observed to have a low signal encountered from the capsule resulting in lack of localization,but no images were lost.CONCLUSION:Capsule-induced EMI remains a possibility but is unlikely to be clinically important.CPinduced interference of SBCE is also possible,but is infrequent and does not result in loss of images transmitted by the capsule.展开更多
Our Letter to the Editor, related to the article "Small bowel capsule endoscopy in patients with cardiac pacemakers and implantable cardioverter defibrillators: Outcome analysis using telemetry" by Cuschieri...Our Letter to the Editor, related to the article "Small bowel capsule endoscopy in patients with cardiac pacemakers and implantable cardioverter defibrillators: Outcome analysis using telemetry" by Cuschieri et al , comments on some small errors, that slipped into the authors discussions. The given informations concerning the pacemakerand implantable cardioverter defibrillators modes were inaccurate and differ between the text and the table. Moreover, as 8 of 20 patient's pacemakers were programmed to VOO or DOO ("interference mode") and one patient was not monitored by telemetry during capsule endoscopy, 9 of 20 patients (45%) lack the informations of possible interference between capsule endoscopy their implanted device. Another objection refers to the interpretation of an electrocardiogram (figure 1, trace B) presented: in contrast to the author's opinion the marked spike should be interpreted as an artefact and not as "undersensing of a fibrillatory wave". Finally, three comments to cited reviews were not complete respectively not quoted correctly.展开更多
网络遥测是一种新型的网络测量技术,具有实时性强、准确性高、开销低的特点。现有网络遥测技术存在无法收集多粒度网络数据、无法有效存储大量原始网络数据、无法快速提取及生成网络遥测信息、无法利用内核态及用户态特性设计网络遥测...网络遥测是一种新型的网络测量技术,具有实时性强、准确性高、开销低的特点。现有网络遥测技术存在无法收集多粒度网络数据、无法有效存储大量原始网络数据、无法快速提取及生成网络遥测信息、无法利用内核态及用户态特性设计网络遥测方案等问题。为此,提出了一种融合内核态及用户态的、基于遥测数据图和同步控制块的多粒度、可扩展、覆盖全网的网络遥测机制(a nEtwork telemetry mechAnism based on telemetry data Graph in kerneL and usEr mode,EAGLE)。EAGLE设计了一种能够收集多粒度数据且数据平面上灵活可控的网络遥测数据包结构,用于获取上层应用所需的数据。此外,为快速存储、查询、统计、聚合网络状态数据,实现网络遥测数据包所需遥测数据的快速提取与生成,EAGLE提出了一种基于遥测数据图及同步控制块的网络遥测信息生成方法。在此基础上,为了最大化网络遥测机制中网络遥测数据包的处理效率,EAGLE提出了融合内核态及用户态特性的网络遥测信息嵌入架构。在Open vSwitch上实现了EAGLE方案并进行了测试,测试结果表明,EAGLE能够收集多粒度数据并快速提取与生成遥测数据,且仅增加极少量的处理时延及资源占用率。展开更多
目的探究在心脏再同步化治疗双心室起搏过程中阳极夺获现象的观察方法以及其影响因素。方法M edtron ic公司Insync III 8042系统置入者15例,其中男12例,女3例,年龄66±8岁,扩张型心肌病13例,陈旧性前壁心肌梗死伴心力衰竭2例。测试...目的探究在心脏再同步化治疗双心室起搏过程中阳极夺获现象的观察方法以及其影响因素。方法M edtron ic公司Insync III 8042系统置入者15例,其中男12例,女3例,年龄66±8岁,扩张型心肌病13例,陈旧性前壁心肌梗死伴心力衰竭2例。测试时,使用多导生理记录仪同步记录体表12导联心电图,程控起搏器左室电极为LV tip+RV proximal ring模式,启动自动阈值测定程序,分别在1,0.4,0.2 ms下从7.5 V逐降左室起搏电压观察有无RV proximal ring阳极夺获现象以及左室起搏阈值并确定安全范围(阳极夺获时起搏电压减去起搏阈值)。结果在1 m s、7.5 V下左室起搏时,有13例均可观察到右室proxim al ring阳极夺获现象,在1 m s、5 V起搏时有6例可观察到阳极夺获现象,在0.4 m s、7.5 V时有4例可观察到阳极夺获现象,其他情况下未观察到阳极夺获现象。1 m s脉宽时阳极夺获电压阈值显著高于左室电极阈值,1 m s脉宽时无阳极夺获的安全范围显著小于0.4 m s及0.2 m s时。结论在Insync III 8042系统中,宽脉冲(1 m s)高电压起搏下容易发生阳极夺获,缩短脉宽可以增加无阳极夺获的安全起搏范围。展开更多
文摘AIM:To determine if there were any interactions between cardiac devices and small bowel capsules secondary to electromagnetic interference (EMI) in patients who have undergone small bowel capsule endoscopy (SBCE).METHODS:Authors conducted a chart review of 20 patients with a cardiac pacemaker (CP) or implantable cardioverter defibrillator (ICD) who underwent continuous electrocardiographic monitoring during their SBCE from 2003-2008.authors searched for unexplained electrocardiogram (ECG) findings,changes in CP andICD set parameters,any abnormality in transmitted capsule data,and adverse clinical events.RESULTS:There were no adverse events or hemodynamically significant arrhythmias reported.CP and ICD set parameters were preserved.The majority of ECG abnormalities were also found in pre-or post-SBCE ECG tracings and the CP behavior during arrhythmias appeared appropriate.Two patients seemed to have episodes of undersensing by the CP.However,similar findings were documented in ECGs taken outside the time frame of the SBCE.One patient was observed to have a low signal encountered from the capsule resulting in lack of localization,but no images were lost.CONCLUSION:Capsule-induced EMI remains a possibility but is unlikely to be clinically important.CPinduced interference of SBCE is also possible,but is infrequent and does not result in loss of images transmitted by the capsule.
文摘Our Letter to the Editor, related to the article "Small bowel capsule endoscopy in patients with cardiac pacemakers and implantable cardioverter defibrillators: Outcome analysis using telemetry" by Cuschieri et al , comments on some small errors, that slipped into the authors discussions. The given informations concerning the pacemakerand implantable cardioverter defibrillators modes were inaccurate and differ between the text and the table. Moreover, as 8 of 20 patient's pacemakers were programmed to VOO or DOO ("interference mode") and one patient was not monitored by telemetry during capsule endoscopy, 9 of 20 patients (45%) lack the informations of possible interference between capsule endoscopy their implanted device. Another objection refers to the interpretation of an electrocardiogram (figure 1, trace B) presented: in contrast to the author's opinion the marked spike should be interpreted as an artefact and not as "undersensing of a fibrillatory wave". Finally, three comments to cited reviews were not complete respectively not quoted correctly.
文摘网络遥测是一种新型的网络测量技术,具有实时性强、准确性高、开销低的特点。现有网络遥测技术存在无法收集多粒度网络数据、无法有效存储大量原始网络数据、无法快速提取及生成网络遥测信息、无法利用内核态及用户态特性设计网络遥测方案等问题。为此,提出了一种融合内核态及用户态的、基于遥测数据图和同步控制块的多粒度、可扩展、覆盖全网的网络遥测机制(a nEtwork telemetry mechAnism based on telemetry data Graph in kerneL and usEr mode,EAGLE)。EAGLE设计了一种能够收集多粒度数据且数据平面上灵活可控的网络遥测数据包结构,用于获取上层应用所需的数据。此外,为快速存储、查询、统计、聚合网络状态数据,实现网络遥测数据包所需遥测数据的快速提取与生成,EAGLE提出了一种基于遥测数据图及同步控制块的网络遥测信息生成方法。在此基础上,为了最大化网络遥测机制中网络遥测数据包的处理效率,EAGLE提出了融合内核态及用户态特性的网络遥测信息嵌入架构。在Open vSwitch上实现了EAGLE方案并进行了测试,测试结果表明,EAGLE能够收集多粒度数据并快速提取与生成遥测数据,且仅增加极少量的处理时延及资源占用率。
文摘目的探究在心脏再同步化治疗双心室起搏过程中阳极夺获现象的观察方法以及其影响因素。方法M edtron ic公司Insync III 8042系统置入者15例,其中男12例,女3例,年龄66±8岁,扩张型心肌病13例,陈旧性前壁心肌梗死伴心力衰竭2例。测试时,使用多导生理记录仪同步记录体表12导联心电图,程控起搏器左室电极为LV tip+RV proximal ring模式,启动自动阈值测定程序,分别在1,0.4,0.2 ms下从7.5 V逐降左室起搏电压观察有无RV proximal ring阳极夺获现象以及左室起搏阈值并确定安全范围(阳极夺获时起搏电压减去起搏阈值)。结果在1 m s、7.5 V下左室起搏时,有13例均可观察到右室proxim al ring阳极夺获现象,在1 m s、5 V起搏时有6例可观察到阳极夺获现象,在0.4 m s、7.5 V时有4例可观察到阳极夺获现象,其他情况下未观察到阳极夺获现象。1 m s脉宽时阳极夺获电压阈值显著高于左室电极阈值,1 m s脉宽时无阳极夺获的安全范围显著小于0.4 m s及0.2 m s时。结论在Insync III 8042系统中,宽脉冲(1 m s)高电压起搏下容易发生阳极夺获,缩短脉宽可以增加无阳极夺获的安全起搏范围。
