ABSTRACT
Nº
00110JA
TEXTO
COMPLETO
PANEL DE DISCUSIÓN
DIA 10 A 17 DE
NOVIEMBRE DE 1.999
Pacemaker
with Autocaptura. Effects of body position on your perfomance.
TEXTO
COMPLETO
Jose A. Lapuerta
* Oscar Sanz
Mª Teresa Antuña
Jose Guerra
Cabuenes Hospital.
Gijon(Asturias) SPAIN
Introduction:
Studies have show that Autocapture (St.
Jude Medical , Pacesetter Inc.) system is reliable and saves pacing energy
thanks to stimulation 0.3V above the threshold. Follow-ups are usually
performed with the patient in supine position which perhaps is not the
most common position during the day. This study attemps to determine differences
in Autocapture-threshold, VARIO-threshold, Evoked Response detection and
Spontaneous R-wave detection between supine and normal sitting position.
From June 1997 to May 1999, 17 Microny
SR+ pulse generator, model 2425T (St. Jude Medical, Pacesetter Inc.) and
Membrane E, model 1450T (St. Jude Medical , Pacesetter Inc.) were implanted
in 17 patients (5 female and 12 male) at our hospital. Indication in all
of them was atrial fibrilation (AF) with severe AV block. Autocapture-threshold,
Vario-threshold, Evoked Response (ER) and R wave (RW) were measured after
One, Three, Six and 12 months in supine and sitting 90 degree. The pulse
width used to perform Autocapture and Vario Threshold test was 0,3 ms (shipped
setting).
RESULTS:
Data from 64 follow-ups have been collected:
Supine(Mean ± SD)
Upright (Mean ± MD) P value
VARIO (V)
0,74 ± 0,23
0,75 ± 0,24
NS
AUTOCAPTURE (V)
0,86 ± 0,24
0,87 ± 0,23
NS
ER (mV)
9,18 ± 4,95
10,14 ± 4,95
<0,001
RW (mV)
15,01 ± 7,32
15,96 ± 8,10
0,001
CONCLUSIONS:
Evoked responses values and spontaneous
R-wave increased significantly when the patient is in an upright sitting
position. The obseved changes did not interfere with the Autocapture algorithm
and support routine measurements in a supine position.
Topic=email session
Topic=Arritmias-Marcapasos
Topic=NO, TABLAS,FIGURAS
Name - EMail=jose.lapuerta@hcabuenes.es
