Naslov
Cardiac Lead as a Myocardial Contraction Sensor - human study

Autori
Brusich, Sandro ; Tomašić, Danko ; Ferek-Petrić, Božidar

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, stručni

Izvornik
Abstracts of the 32nd Annual Scientific Sessions of the Heart Rhythm Society ; u: Heart rhythm 8 (2011) (5) (Suppl.) (S1-S576) / Zipes, Douglas P - : Elsevier, 2011

Skup
Annual Scientific Sessions of the Heart Rhythm Society (32 ; 2011)

Mjesto i datum
San Francisco (CA), Sjedinjene Američke Države, 04.05.2011. - 07.05.2011

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
pacing; sensors; myocardial contraction

Sažetak
Whenever a high frequency (HF) signal is applied to the cardiac lead, it must be considered to be a transmission line. Cardiac contractions bend the lead body and extend and compress the lead conductors and their insulation, thereby modulating the HF parameters of the lead. Magnitude of the lead body deflection depends on the radial lead stiffness and on the cardiac muscle contraction forces. The purpose of this pilot study was to investigate the possibility to measure ventricular contraction parameters utilizing the HF parameters measurement on any type of the lead. We did HF measurements during routine threshold and sensing test procedure in 28 patients undergoing device implantation or replacement. Network analyzer 3577B (Hewlett-Packard, USA) was used in combination with 35676B Reflection/Transmission test kit. We connected IS-1 bipolar connector via sterile coaxial cable to the test kit port. Full calibration procedure of the HF connecting system was done before measurements utilizing measurement signal at frequency of 100 and 200 MHz. ECG and SO2 from monitor, IEGM from PSA of Medtronic 2090 programmer and HF signal were simultaneously recorded utilizing digital signal acquisition system. Recording was done in 11 models of ventricular leads of four different manufacturers. We were able to record the HF reflection signal modulation, caused by the lead bending, in 24 patients. The wave obtained by HF measurements system occurred always after the QRS complex during expected ventricular contraction period whereby timely corresponding to the SO2 wave. In dual chamber system, the HF measurement was not possible in 4 patients due to the rhythmic intra-atrial collision of two lead bodies that generated the huge HF artefact. Further investigation will determine the correlation of HF signal parameters with dP/dt and fidelity of atrial and LV leads signals. Hemodynamic stability of arrhythmia and optimization of heart failure therapy including CRT should be investigated utilizing our sensor. Every standard cardiac lead may be the cardiac contraction sensor without any special device mounted on its body. Additional HF hardware in cardiac devices would be neither design challenge nor source of decreased battery longevity.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika, Kliničke medicinske znanosti

POVEZANOST RADA