An accessory pathway is an additional electrical pathway that you were born with that conducts electricity faster than the
normalNormal saline flush conduction system so allows your heart to beat at faster than normal rates. If need be this may be treated with an ablation to destroy this tissue.
A thallium test is a radioisotope that is taken up by the active heart muscle. changes in thallium distribution will detect areas of the heart that are not receiveing adequate flow and suggest where blockages may be in the coronary arteries.