BACKGROUND: The role of speckle tracking in the assessment of right atrial (RA) deformation dynamics has not been established yet. The reference ranges of RA longitudinal strain indices were measured by speckle tracking in a population of normal subjects. METHODS: In 84 healthy individuals, peak atrial longitudinal strain (PALS), peak atrial contraction strain (PACS), and time to peak longitudinal strain (TPLS) were measured using a six-segment model for the RA. Strain rate (SR) was also measured starting from the QRS-wave onset, peak positive (x-wave), first peak negative (y-wave), and second negative peak (z-wave). The time from the QRS onset was measured to each wave peak. RESULTS: Adequate tracking quality was achieved in 64% of segments analyzed. Inter- and intraobserver variability coefficients of measurements ranged between 6% and 11%. Global PALS was 49 ± 13%, global TPLS was 363 ± 59 msec, x-wave was 2.12 ± 0.58 sec(-1) , y-wave was -1.91 ± 0.63 sec(-1) , and z-wave was -2.18 ± 0.78 sec(-1) . CONCLUSION: Speckle tracking is a feasible technique for the assessment of longitudinal myocardial RA deformation. Reference ranges of strain indices were reported.
BACKGROUND: The role of speckle tracking in the assessment of right atrial (RA) deformation dynamics has not been established yet. The reference ranges of RA longitudinal strain indices were measured by speckle tracking in a population of normal subjects. METHODS: In 84 healthy individuals, peak atrial longitudinal strain (PALS), peak atrial contraction strain (PACS), and time to peak longitudinal strain (TPLS) were measured using a six-segment model for the RA. Strain rate (SR) was also measured starting from the QRS-wave onset, peak positive (x-wave), first peak negative (y-wave), and second negative peak (z-wave). The time from the QRS onset was measured to each wave peak. RESULTS: Adequate tracking quality was achieved in 64% of segments analyzed. Inter- and intraobserver variability coefficients of measurements ranged between 6% and 11%. Global PALS was 49 ± 13%, global TPLS was 363 ± 59 msec, x-wave was 2.12 ± 0.58 sec(-1) , y-wave was -1.91 ± 0.63 sec(-1) , and z-wave was -2.18 ± 0.78 sec(-1) . CONCLUSION: Speckle tracking is a feasible technique for the assessment of longitudinal myocardial RA deformation. Reference ranges of strain indices were reported.
Authors: Flavio D'Ascenzi; Marco Solari; Michele Biagi; Francesco Cassano; Marta Focardi; Domenico Corrado; Marco Bonifazi; Sergio Mondillo; Michael Henein Journal: Int J Cardiovasc Imaging Date: 2015-10-17 Impact factor: 2.357
Authors: Fawaz Alenezi; Aditya Mandawat; Zachary J Il'Giovine; Linda K Shaw; Irfan Siddiqui; Victor F Tapson; Kristine Arges; Danny Rivera; Minna M D Romano; Eric J Velazquez; Pamela S Douglas; Zainab Samad; Sudarshan Rajagopal Journal: Circ Cardiovasc Imaging Date: 2018-11 Impact factor: 7.792