Naslov
Sensing shift of sensitivity programable pacemakers

Autori
Ferek, Božidar ; Drinković, N. ; Išgum, Velimir ; Juršić, M. ; Pustišek, S. ; Ugljen, Ranko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Cardiac Pacing and Electrophysiology / Belhassen, Bernard ; Feldman, Shlomo ; Copperman, Yitschak - Tel Aviv, 1987, 209-216

Skup
VIIIth World Symposium on Cardiac Pacing and Electrophysiology

Mjesto i datum
Jeruzalem, Izrael, 07.06.1987. - 11.06.1987

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
pacemaker; sensing precission

Sažetak
The purpose of this study was to investigate sensing timing accuracy at different sensitivity settings. One hundred eighteen patient having multiprogrammable ventricular pacemakers were programmed in VVT mode and low rate. Six-lead ECG’ a were recorded at every possible sensitivity setting. Alteration of he time interval between onset of QRS wave and pacemaker spike was measured and named as the ‘ ventricular sensing shift interval’ (SSI). Thirty-one patients with DDT pacemakers additionally were studied by means of subcortical M-mode echocardiography of the right atrial wall. They were programmed on low atrial rate and in VDD mode. Echocardiogram were recorded at every atrial sensitivity setting. The alteration of the time interval between maximum of the atrial contraction and ventricular spike was measured and named as ‘ atrioventricular SSI’ Average overall SSI’ s (programming from highest to lowest sensitivity) were 19 ms in ventricular and 12 ms in dual chamber pacemakers. There was no significant difference in sensing shift characteristics among various pacemakers (4 manufacturers, 11 models) used in this study. The SSI duration depends on the endocardial signal waveform and is in inverse proportion to its slew rate. Contemporary design of sensing circuits does not comply with the clinical demand for timing precision. Sensitivity programming can distort the critical timing of antitachycardia pacemaker as well as it can exert influence on the patient’ s rhythm in DDD pacing.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika, Kliničke medicinske znanosti

POVEZANOST RADA