Figure 1. LA strain and strain rate curves from a patient with AL-CA and
a patient with HHD. Figure 1(A): LA strain parameters from a patient
with AL-CA. Figure 1(B): LA strain rate parameters from a patient with
AL-CA. Figure 1(C): LA strain parameters from a patient with HHD. Figure
1(D): LA strain rate parameters from a patient with HHD.
Statistical analysis
Shapiro–Wilk test were used to test continuous variables for normality.
Continuous variables conforming to normality were expressed as mean
(standard deviation, SD) and compared using student’s t test. Continuous
variables failing to conform to normality were expressed as median
(interquartile range, IQR) and compared using Wilcoxon rank-sum test.
Categorical variables were expressed as frequencies (percentages) and
compared using Pearson’s chi-squared test. Receiver operating
characteristic (ROC) curves were employed to assess the ability of LASr
and LASct for discriminating between AL-CA and HT patients. Pearson’s
correlation coefficient was used to evaluate the correlation between LA
function and LV structure, LV function, and LA size. All analyses were
performed using Stata version 15.1. All p-values and confidence
intervals were two-sided.