Abstract
Background
Significant bradycardia followed by cardiac arrest related to single bolus administration of X-ray contrast medium into a peripheral artery has not, to our knowledge, been described in the literature.
Methods and Results
While performing a percutaneous transluminal angioplasty of the left superficial femoral artery in a 68-year old patient with a pre-existing atrioventricular (AV) block, Wenckebach type, he developed an AV block III after a single bolus injection of intra-arterial X-ray contrast medium.
Conclusion
We believe that application of contrast medium causes a transitory ischemia in the obstructed vessel and therefore elevation of endogenous adenosine. In the case of a previously damaged AV node this elevation of endogenous adenosine may be responsible for the development of a short period of third-degree AV block.
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Brodmann, M., Seinost, G., Stark, G. et al. Aggravation of Pre-Existing Atrioventricular Block, Wenckebach Type, Provoked by Application of X-Ray Contrast Medium. Cardiovasc Intervent Radiol 29, 1114–1116 (2006). https://doi.org/10.1007/s00270-005-0133-x
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DOI: https://doi.org/10.1007/s00270-005-0133-x