منابع مشابه
Endocardial electrograms from pacemaker catheters.
Proper placement of pacemaker catheters can be facilitated by recording endocardial electrograms from the catheters. These electrograms are also helpful in the investigation of pacemaker failure. Endocardial contact is indicated by S-T segment elevation. When bipolar catheters are used, these "contact currents" may be visible in electrograms from the tip or ring electrodes, or both. Right ventr...
متن کاملMiniaturized Radio Frequency Telemetric Pacemaker with Anti- arrhythmic Pacing Protocol
Fatal arrhythmias and ventricular fibrillation (VF) which lead to sudden cardiac death are believed to be preceded by alternans, observed as a beat-to-beat variation of the T-wave amplitude on the ECG [1,2]. Previous studies to predict the onset of alternans involved the restitution curve, the functional relationship between the action potential duration (APD) and preceding diastolic interval (...
متن کاملEndocardial Pacemaker Implantation in Neonates and Infants
Transvenous pacemaker lead implantation is the preferred method of pacing in adult patients. Lead performance and longevity are superior and the implantation approach can be performed under local anaesthetic with a very low morbidity. In children, and especially in neonates and infants, the epicardial route was traditionally chosen until the advent of smaller generators and lead implantation te...
متن کاملConstrictive pericarditis complicating an endocardial pacemaker.
SUMMARY A patient is described with constrictive pericarditis after insertion of an endocardial pacemaker. As far as we know this complication has not been reported previously. Permanent endocardial pacemakers are now commonly implanted and a number of complications have been described.1 Constrictive pericarditis has been reported as a complication of epicardial pacemakers2; this has never been...
متن کاملIs “Silent Ischemia” Detectable by Endocardial Pacemaker Leads?
The purpose of the following pilot study is to evaluate the possibility to detect the asymptomatic ischemic episodes which often precede dangerous events by means of endocardial signals. Intracardiac electrograms (IEGMs) have been detected in patients undergoing percutaneous transluminal coronary angioplasty (PTCA), a procedure during which ischemic episodes are induced. For 10 patients IECGs h...
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ژورنال
عنوان ژورنال: The Journal of Thoracic and Cardiovascular Surgery
سال: 1967
ISSN: 0022-5223
DOI: 10.1016/s0022-5223(19)43154-1