Ziheng Zhang1, Daniel Friedman1, 2, Donald P. Dione3, Ben A. Lin3, James S. Duncan4, Albert J. Sinusas3, Smita Sampath1
1Department of Diagnostic Radiology, Yale University School of Medicine, New Haven, CT, United States; 2Department of Mechanical Engineering , University of Pennsylvania School of Engineering and Applied Sciences , philadelphia, PA, United States; 3Department of Medicine, Section of Cardiovascular Medicine, Yale University School of Medicine; 4Department of Biomedical Engineering and Diagnostic Radiology, Yale University
The functional mechanisms involved in adverse left ventricular remodeling caused by reperfusion injury are unclear. We have developed a new high temporal resolution MR imaging technique, SPAMM-PAV (SPAtially Modulated Magnetization with Polarity Alternated Velocity encoding) that provides simultaneous regional assessment of flow velocities and myocardial strains during early diastole. Using this method, we performed flow pathline analysis, (1) to study the impact of RI on the nature of filling patterns and (2) to develop a novel index of filling efficiency, characterized by the kinetic energy of flow pathlines during early diastole.