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Threshold curves with large and small surface intracardiac pacemaker electrodes are compared. The 2 msec. impulse threshold with a 47 sq. mm. electrode was 3.6 v. (4.3 mA.) on the fourteenth postoperative day, when it reached its maximum, and 2.8 v. (3.1 mA.) one month after the operation. These values were 45 and 30 per cent lower with a 6 sq. mm. electrode. Thresholds increased by about 20 per cent when the impulse duration was shortened from 2 to 0.5 msec. The small surface electrode consumed about 35 per cent less current than the 47 sq. mm. one. A newly designed large area-small surface electrode with the shape of an open cage, seems to have the advantages of less increase in postoperative thresholds and good attachment to the endocardial wall.
H Lagergren, and
O Edhag, and
I Wahlberg
April 1968,
The Journal of surgical research,
H Lagergren, and
O Edhag, and
I Wahlberg
November 1986,
Pacing and clinical electrophysiology : PACE,
H Lagergren, and
O Edhag, and
I Wahlberg
January 1978,
Zentralblatt fur Chirurgie,
H Lagergren, and
O Edhag, and
I Wahlberg
January 1970,
Acta medica Scandinavica,
H Lagergren, and
O Edhag, and
I Wahlberg
September 1990,
Pacing and clinical electrophysiology : PACE,
H Lagergren, and
O Edhag, and
I Wahlberg
May 1982,
Collected works on cardio-pulmonary disease,
H Lagergren, and
O Edhag, and
I Wahlberg
January 1979,
Pacing and clinical electrophysiology : PACE,
H Lagergren, and
O Edhag, and
I Wahlberg
January 1997,
Vestnik rentgenologii i radiologii,
H Lagergren, and
O Edhag, and
I Wahlberg
December 1993,
Circulation,
H Lagergren, and
O Edhag, and
I Wahlberg
June 1997,
The American journal of cardiology,
