Relations of longitudinal left ventricular systolic function to left ventricular mass, load, and Doppler stroke volume.
OBJECTIVE
To evaluate whether the peak systolic velocities of the displacement of the lateral mitral anulus (Sa) and of the mid-portion of the interventricular septal wall (Sm) correlate with measures of left ventricular load, left ventricular mass, and Doppler stroke volume in normotensive and hypertensive subjects without clinically overt cardiovascular disease.


RESULTS
Tissue Doppler imaging was used to evaluate Sa and Sm in apical 4-chamber view; standard echocardiographic procedures were used to assess left ventricular structure and traditional parameters of systolic function (ejection fraction, stress-corrected midwall shortening, meridional and circumferential end-systolic stress); pulsed Doppler was employed to evaluate stroke volume. In 87 subjects meeting inclusion criteria, Sa and Sm were not significantly correlated either with left ventricular end-diastolic volume and end-systolic stress, or with stroke volume; in contrast, endocardial and midwall fractional shortening were lower with higher afterload, as expected. Fractional shortening at endocardium and midwall, and Sm were lower with higher left ventricular mass. Mean Sa and Sm values were lower in subjects with low vs. those with normal stress-corrected midwall shortening, but low Sa was not associated with lower stress-corrected midwall shortening in our study sample.


CONCLUSIONS
While Sa and Sm might be indices of longitudinal left ventricular systolic mechanics, they should not be considered as measures of left ventricular contractility alternative to well-established parameters of systolic function, such as stress-corrected midwall shortening, in subjects at rest without overt heart disease.
Palmieri
Vittorio
V
Department of Clinical and Experimental Medicine, Federico II University School of Medicine, 80131 Naples, Italy. vpalmier@med.cornell.edu
Russo
Cesare
C
Arezzi
Emma
E
Pezzullo
Salvatore
S
Sabatella
Maria
M
Minichiello
Stefana
S
Celentano
Aldo
A
D000328:Adult; D000368:Aged; D001783:Blood Flow Velocity; D001794:Blood Pressure; D015992:Body Mass Index; D015150:Echocardiography, Doppler; D005260:Female; D006801:Humans; D006973:Hypertension / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D017379:Hypertrophy, Left Ventricular / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction; D013318:Stroke Volume; D016277:Ventricular Function, Left