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Echocardiography and Cardiac Magnetic Resonance‐Based Feature Tracking in the Assessment of Myocardial Mechanics in Tetralogy of Fallot: An Intermodality Comparison
Author(s) -
Padiyath Asif,
Gribben Paul,
Abraham Joseph R.,
Li Ling,
Rangamani Sheela,
Schuster Andreas,
Danford David A.,
Pedrizzetti Gianni,
Kutty Shelby
Publication year - 2013
Publication title -
echocardiography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 62
eISSN - 1540-8175
pISSN - 0742-2822
DOI - 10.1111/echo.12016
Subject(s) - tetralogy of fallot , feature tracking , cardiology , cardiac magnetic resonance , medicine , magnetic resonance imaging , nuclear medicine , radiology , heart disease , physics , quantum mechanics , harp
We investigated intermodality agreements of strains from two‐dimensional echocardiography (2 DE ) and cardiac magnetic resonance ( CMR ) feature tracking ( FT ) in the assessment of right ( RV ) and left ventricular ( LV ) mechanics in tetralogy of Fallot ( TOF ). Patients were prospectively studied with 2 DE and CMR performed contiguously. LV and RV strains were computed separately using 2 DE and CMR ‐ FT . Segmental and global longitudinal strains ( GLS ) for the LV and RV were measured from four‐chamber views; LV radial (global radial strain [ GRS ]) and circumferential strains ( GCS ) measured from short‐axis views. Intermodality and interobserver agreements were examined. In 40 patients (20 TOF , mean age 23 years and 20 adult controls), LV , GCS showed narrowest intermodality limits of agreement (mean percentage error 9.5%), followed by GLS (16.4%). RV GLS had mean intermodality difference of 25.7%. GLS and GCS had acceptable interobserver agreement for the LV and RV with both 2 DE and CMR ‐ FT , whereas GRS had high interobserver and intermodality variability. In conclusion, myocardial strains for the RV and LV derived using currently available 2 DE and CMR ‐ FT software are subject to considerable intermodality variability. For both modalities, LV GCS , LV GLS , and RV GLS are reproducible enough to warrant further investigation of incremental clinical merit.