Right Atrial Mechanics Long-Term after Biventricular Repair of XXXX or Stenosis with Intact Ventricular Septum.

@entity1 @entity12043 @entity849 @entity1146 @entity67
BACKGROUND: This study tested the hypothesis that right atrial (RA) mechanics are altered in @entity1 after repair of @entity1146 with @entity12043 (PAIVS) and @entity849 ( @entity849 ) and to explore their relationships with right ventricular (RV) diastolic function and P-wave indices. METHODS: Thirty-six adult @entity1 , 16 with PAIVS and 20 with @entity849 @entity1 , and 20 age-matched healthy subjects were studied. Right atrial mechanics were assessed using speckle tracking echocardiography (STE) with quantification of positive, negative, and total strain, and strain rates at ventricular systole (aSRs ), early diastole (aSRed ), and atrial contraction (aSRac ). Right ventricular diastolic function was assessed by Doppler interrogation and STE. Maximum P-wave duration and P-wave dispersion were measured. RESULTS: Compared with controls, PAIVS and @entity849 @entity1 had significantly lower RA positive and total strain, aSRs and aSRed (all P < 0.05). Parameters of RV diastolic function including transtricuspid early (E) and late (A) diastolic inflow velocities, E/A ratio, early diastolic tricuspid annular velocity (e), early to late diastolic annular velocity ratio, E/e ratio, and RV early diastolic strain rate were found to correlate significantly with RA positive and total strain and aSRed (all P < 0.05). Maximum P-wave duration and P-wave dispersion increased progressively across control, @entity849 , and PAIVS groups (P for trend <0.001). Both P-wave indices correlated negatively with RA positive strain, total strain, and aSRed (all P < 0.05). CONCLUSION: Impairment of RA mechanics occurs in @entity1 long term after repair of PAIVS and @entity849 and is associated with RV @entity67 , longer P-wave duration, and greater P-wave dispersion.
