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Recently, a new exercise test criterion diagnosing coronary artery disease was proposed, based on a composite of changes in Q-, R- and S-waves: the QRS score. We compared this new criterion with conventional ST-segment depression and other compositions of Q-, R- and S-wave changes in patients and normals and related the QRS score to reversible thallium-201 scintigraphic defects and ST-segment depression as markers for ischaemia. The influence of beta-blockade on the QRS score was also studied.

european heart journal

lschaemic heart disease: The QRS score: a promising new exercise score for detecting coronary artery disease based on exercise-induced changes of Q-, R- and S-waves: a relationship with myocardial ischaemia