New cardiomechanic pacing lead sensor based on high frequency parameters: experimental studies in sheep.

Unlabelled: Pacing Lead as a High Frequency Cardiomechanic Sensor. 

Introduction: The purpose of this study was to investigate the possibility of detecting and quantifying ventricular contraction in sheep utilizing the cardiomechanic sensor based upon the high frequency (HF) parameters measurements on bipolar cardiac pacing leads. Measurement of the HF reflection coefficient yields the lead-bending signal (LBS) caused by myocardial contraction.

Acute and chronic high-frequency properties of cardiac pacing and defibrillation leads.

The purpose of our study was to investigate variety of cardiac lead conductor designs as high-frequency (HF) transmission lines. Special attention was given on evaluation of chronic HF applications in cardiac electrotherapy. We measured the characteristic impedance and the attenuation coefficient of six pacing leads between 1 and 21 MHz.

Acute animal and human study of tensiometric pacing lead sensor based on triboelectricity.

Cardiac contractions bend the implanted cardiac lead body, extend and compress the lead conductors, their insulation and the inserted stylet. Magnitude of lead deflection depends on cardiac muscle contraction forces. The purpose of study was to measure the charge generated due to triboelectric effect between one of the lead conductors and the inserted stylet.

[Atrio-biventricular electrostimulation in the treatment of congestive heart failure. Case report].

Over the past few years, indications for permanent cardiac pacing have been broadened. Accordingly, American Heart Association and American College of Cardiology included dilated cardiomyopathy, hypertrophic obstructive cardiomyopathy and pacing for prevention of atrial fibrillation into indications for permanent cardiac pacing. Studies have described favourable effect of dual chamber cardiac pacing in congestive heart failure in dilated cardiomyopathy, regardless of etiology.

[Management of surgery patients with implanted cardiac pacemakers].

Patients having cardiac pacemaker implanted may be subjected to various general surgery procedures. Application of electrosurgery for the purpose of resection and coagulation, provides a high frequency electric field which produces electric voltage on the electrodes of the pacing system. This voltage may be detected within the pacing system, and various arrhythmias can be provoked in correlation with underlying rhythm and mode of pacing.