ABSTRACT
Objective To analyze the characteristics and influencing factors of coronary sinus(CS) dilation in patients with primary pulmonary hypertension(PPH) and persistent left superior vena cava(LSVC). Methods Control group included twenty-two normal subjects [mean age ( 40.6 ? 10.6 ) years],PPH group included twenty-six patients with PPH [mean age ( 41.9 ? 11.4 ) years] and LSVC group included thirty-three patients with LSVC [mean age ( 30.9 ? 15.8 ) years]. After the standard apical four-chamber view was obtained,the transducer was tilted backward to direct ultrasonic beam towards the left atrioventricular groove,then the distal part of the CS could be exposed. Echocardiographic parameters of the CS included end-systolic diameter of CS orifice(CSOESD),end-diastolic diameter of CS orifice(CSOEDD),the ratio of CSOESD to CSOEDD (CSOESD/EDD). Results CSOESD,CSOEDD were larger [CSOESD ( 12.56 ? 3.58 )mm vs ( 8.47 ? 2.32 )mm,P
ABSTRACT
ObjectiveTo determine the dispersion of atrial contraction time(A) and electromechanical time (P A) in different parts of atria among paroxysmal atrial fibrillation (PAF) patients by Doppler tissue imaging (DTI). MethodsDTI data were acquired in 58 PAF patients and 31 normal subjects. The DTI images of various parts were obtained by using apical 4 chamber view and sample volume was placed at the interventricular septum atrioventricular annulus, left lateral mitral annulus and right lateral tricuspid annulus, then P A and A were detected. The difference of P A and A between various parts of atria were calculated. ResultsThe dimension of left atria, right atria,systolic blood pressure and age in PAF group were much greater than those in controls. The difference of P A and A between left lateral mitral annulus and right lateral tricuspid annulus (T3,TT3) were significantly larger in PAF patients than in normal subjects[T3:( 24.27 ? 18.29 )ms vs ( 16.76 ? 10.96 )ms, P