A Non-Magnetic, MR-Compatible Pacing Catheter for Clinical Application in Magnetocardiography

Moshage, Werner; Achenbach, S.; Bolz, A.; Weikl, A; P, Wegener; Bachmann, K.; Schaldach, M.

doi:10.1515/bmte.1990.35.s3.162

Cited by 6 publications

(3 citation statements)

References 1 publication

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“…Additionally, it was compatible to MR imaging in order to permit the exact documentation of the catheter tip's position without heating of the electrodes [12]. Commercially available pacing catheters Figure 2.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of the non-invasive localization accuracy of cardiac arrhythmias attainable by multichannel magnetocardiography (MCG)

et al. 1996

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The accuracy of multichannel magnetocardiography (MCG) for the non-invasive localization of cardiac arrhythmias was investigated. A non-magnetic catheter was used in phantom studies and for cardiac pacing of 6 patients. In a clinical setting, 32 patients with WPW-syndrome, 37 patients with premature ventricular complexes and 12 patients with ventricular tachycardia were studied and the MCG results compared to reference methods, including invasive electrophysiological mapping. Phantom and pacing studies demonstrated the spatial localization accuracy to be better than 15 mm for a dipole-to-dewar distance below 15 cm. In all patients with structural cardiac disease, the ectopic focus was localized at the margin of the damaged area, serving as a proof of MCG localization. Invasive mapping confirmed the MCG result whenever performed (42 patients). In 11 patients (9 WPW, 2 VT) the MCG localization result was verified by successful HF catheter ablation as a gold standard. MCG permits the non-invasive localization of cardiac arrhythmias with high spatial accuracy. MCG guided HF catheter ablation constitutes a new concept of non-invasive localization and minimally invasive causal therapy.

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Section: Methodsmentioning

confidence: 99%

Evaluation of the non-invasive localization accuracy of cardiac arrhythmias attainable by multichannel magnetocardiography (MCG)

et al. 1996

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“…A specially designed non-magnetic pacing catheter was developed to permit stimulation at a well defined site within the heart during the magnetocardiographic investigation [9]. The catheter carried two platinum electrodes at a distance of 10 mm.…”

Section: Localization Of Catheter-induced Ventricular Extrasystolesmentioning

confidence: 99%

Clinical magnetocardiography: Experience with a biomagnetic multichannel system

et al. 1991

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The magnetic fields caused by the human heart's electrical activity were coherently recorded with a biomagnetic multichannel system (KRENIKON) during 1 to 10 minutes in 49 patients. 31 to 37 magnetic channels were recorded simultaneously with the ECG and respiration. Comparison of a magnetic index and the Sokolow-Lyon index to echocardiographic findings in the quantification of left ventricular hypertrophy demonstrated the superiority of the magnetocardiogram (MCG) as compared to the ECG. The magnetocardiographic investigation of patients with WPW-Syndrome, ventricular extrasystoles, ventricular tachycardia, and paced ventricular beats demonstrated that multichannel magnetocardiography permits the non-invasive three dimensional localization of arrhythmogenic tissue with high spatial accuracy.

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“…They mentioned only some preliminary results. Moshage et al (26,27) performed MRI in humans with a pace catheter. However, because these authors were only interested in the anatomy surrounding the pace catheter for correlation with magnetocardiograms, they removed the wire from the catheter.…”

Section: Introductionmentioning

confidence: 99%

Transesophageal cardiac pacing during magnetic resonance imaging: Feasibility and safety considerations

Hofman¹,

Cock²,

Linden³

et al. 1996

Magnetic Resonance in Med

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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 (delta tau) was monitored. Eight dogs were exposed to MRI during pacing. For low RF radiation exposure, a time-averaged squared B1 field below 0.08 p tau 2 (SAR < 0.03 W/kg), delta tau was below 1 degree C. For high RF radiation exposure, but at normal RF radiation specific absorption rate (0.4 W/kg) delta tau was 5 degrees 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.

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A Non-Magnetic, MR-Compatible Pacing Catheter for Clinical Application in Magnetocardiography

Cited by 6 publications

References 1 publication

Evaluation of the non-invasive localization accuracy of cardiac arrhythmias attainable by multichannel magnetocardiography (MCG)

Evaluation of the non-invasive localization accuracy of cardiac arrhythmias attainable by multichannel magnetocardiography (MCG)

Clinical magnetocardiography: Experience with a biomagnetic multichannel system

Transesophageal cardiac pacing during magnetic resonance imaging: Feasibility and safety considerations

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