TY - JOUR
T1 - Transesophageal cardiac pacing during magnetic resonance imaging
T2 - Feasibility and safety considerations
AU - Hofman, M. B.M.
AU - De Cock, C. C.
AU - Van der Linden, J. C.
AU - Van Rossum, A. C.
AU - Visser, F. C.
AU - Sprenger, M.
AU - Westerhof, N.
PY - 1996/1/1
Y1 - 1996/1/1
N2 - The feasibility and safety of transesophageal cardiac pacing during clinical MRI at 1.5 Tesla is considered. An MRI compatible pace catheter was developed. In vitro testing showed a normal performance of the pulse generator, image artifacts that extended less than 11 mm from the catheter, and a less than 5% increase in noise. Cardiac stimulation induced by MRI was not observed and, theoretically, is not expected. Potentially, tissue around the catheter tip may become heated. This heating (ΔT) was monitored. Eight dogs were exposed to MRI during pacing. For low RF radiation exposure, a time-averaged squared B1 field below 0.08 pT2 (SAR < 0.03 W/kg), ΔT was below 1°C. For high RF radiation exposure, but at normal RF radiation specific absorption rate (0.4 W/kg), ΔT was 5°C. Thus, transesophageal atrial pacing during MRI at low RF exposure seems to be possible to perform cardiac stress studies or to correct unstable heart rates.
AB - The feasibility and safety of transesophageal cardiac pacing during clinical MRI at 1.5 Tesla is considered. An MRI compatible pace catheter was developed. In vitro testing showed a normal performance of the pulse generator, image artifacts that extended less than 11 mm from the catheter, and a less than 5% increase in noise. Cardiac stimulation induced by MRI was not observed and, theoretically, is not expected. Potentially, tissue around the catheter tip may become heated. This heating (ΔT) was monitored. Eight dogs were exposed to MRI during pacing. For low RF radiation exposure, a time-averaged squared B1 field below 0.08 pT2 (SAR < 0.03 W/kg), ΔT was below 1°C. For high RF radiation exposure, but at normal RF radiation specific absorption rate (0.4 W/kg), ΔT was 5°C. Thus, transesophageal atrial pacing during MRI at low RF exposure seems to be possible to perform cardiac stress studies or to correct unstable heart rates.
KW - cardiac pacing
KW - heating effects
KW - magnetic resonance imaging
KW - safety
UR - http://www.scopus.com/inward/record.url?scp=0030031499&partnerID=8YFLogxK
U2 - https://doi.org/10.1002/mrm.1910350320
DO - https://doi.org/10.1002/mrm.1910350320
M3 - Article
C2 - 8699954
SN - 0740-3194
VL - 35
SP - 413
EP - 422
JO - Magnetic resonance in medicine
JF - Magnetic resonance in medicine
IS - 3
ER -