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Quantification of thallium-201 myocardial uptake using serial dynamic imaging at rest and during exercise.

The thallium-201 myocardial uptake ratio was measured using serial dynamic imaging of the initial uptake phase following an intravenous bolus injection. It revealed no significant difference at rest between non-coronary heart disease and coronary artery disease, while it was greater in cases with left ventricular hypertrophy. With exercise loading, this value significantly increased in non-coronary heart disease, whereas less increase was observed in coronary artery disease. This increasing capability was lower in multivessel disease compared with single-vessel disease.