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.