In conclusion, flow velocity measurements repeated after a 6-month interval show a variability, which is larger for baseline velocity and coronary flow reserve. This variability is correlated with the changes in heart rate and can be reduced by a normalization for the cross-sectional area at the site of the measurement (coronary flow) and for the aortic pressure at the time of the measurement (flow resistance).
Yousif Ahmad, Matthias Götberg, Christopher Cook, James P. Howard, Iqbal Malik, Ghada Mikhail, Angela Frame, Ricardo Petraco, Christopher Rajkumar, Ozan M. Demir, Juan F. Iglesias, Ravinay Bhindi, Sasha Koul, Nearchos Hadjiloizou, Robert Gerber, Ramrakha Punit, Neil Ruparelia, Nilesh Sutaria, Gajen Kanaganayagam, Ben Ariff, Michael Fertleman, Jon Anderson, Andrew Chukwuemeka,
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