ArticleCirculation. Cardiovascular interventions2025
Repeatability and Correlation of Coronary Physiology Indices Measured With Bolus and Continuous Thermodilution.
Article in Circulation. Cardiovascular interventions, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundPrevious studies have shown weak agreement between coronary physiology indices derived from continuous and bolus thermodilution, and suggested greater variability with bolus thermodilution measurements. This study aimed to evaluate the repeatability and correlation of continuous and bolus thermodilution-derived physiology indices in cardiac transplant recipients.
methodsPaired fractional flow reserve (FFR), coronary flow reserve (CFR), index of microcirculatory resistance (IMR), absolute hyperemic resistance (R
resultsIn 20 patients, IMR was more repeatable than CFR and MRR derived from either continuous thermodilution (intraclass correlation coefficient, 0.95 versus 0.70 and 0.59;
conclusionsIn cardiac transplant recipients, IMR had superior repeatability compared with CFR and MRR derived from either bolus or continuous thermodilution, and was equally repeatable compared with R
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