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Abnormal regional left ventricular mechanics in treated hypertensive patients with 'normal left ventricular function'.

Abstract：

:Global systolic and diastolic LV function assessed by conventional echocardiographic indices is often normal in patients with controlled hypertension, with or without left ventricular hypertrophy. However, it is not certain whether regional myocardial function in these patients remains normal. We investigated 26 patients and 10 age matched normal controls, by means of long axis M-mode echocardiography. There was no significant difference in age, sex distribution, heart rate, blood pressure and routine ECG measurements between the two groups. Although there was significant LVH in patients compared to normal controls, LV cavity size and global systolic function, assessed by shortening fraction, ejection fraction and mean velocity of circumferential fibre shortening did not differ between the two groups, nor did LV diastolic function, assessed by the mitral flow pattern. However, LV regional mechanics, as assessed by multiple long axis M-mode echocardiograms differed significantly, in both systole and diastole, between the two groups. Compared to controls, the total longitudinal systolic excursion in both LV free wall and ventricular septum were significantly reduced in patients, and so was maximum early relaxation and atrial contraction in the LV free wall. The mean rate of systolic excursion in all 3 sites did not differ between the two groups, but the mean rate of early relaxation in both LV free wall and ventricular septum was significantly decreased in patients compared to normal controls. In conclusion, the evaluation of LV dysfunction in patients who have achieved good blood pressure control requires more than a conventional echocardiographic assessment. The assessment of regional mechanics described in the present paper offers an easy and sensitive method for the detection of subtle signs of LV mechanical inefficiency associated with LVH.

journal_name

Int J Cardiol

journal_title

International journal of cardiology

authors

Xiao HB,Kaleem S,McCarthy C,Rosen SD

doi

10.1016/j.ijcard.2005.10.001

subject

Has Abstract

pub_date

2006-10-10 00:00:00

pages

316-21

issue

3

eissn

0167-5273

issn

1874-1754

pii

S0167-5273(05)01209-X

journal_volume

112

pub_type

杂志文章

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