Systolic left ventricular function according to left ventricular concentricity and dilatation in hypertensive patients: the Losartan Intervention For Endpoint reduction in hypertension study
Department of Medicine, Division of Cardiovascular Medicine
Aged; Aged, 80 and over; Antihypertensive Agents; Blood Pressure; Body Mass Index; Dilatation; Double-Blind Method; Echocardiography; Electrocardiography; Female; Heart Ventricles; Hemodynamics; Humans; Hypertension; Hypertrophy, Left Ventricular; Losartan; Male; Middle Aged; Prevalence; Prospective Studies; *Systole; Ventricular Function, Left
Cardiology | Cardiovascular Diseases
BACKGROUND: Left ventricular hypertrophy [LVH, high left ventricular mass (LVM)] is traditionally classified as concentric or eccentric based on left ventricular relative wall thickness. We evaluated left ventricular systolic function in a new four-group LVH classification based on left ventricular dilatation [high left ventricular end-diastolic volume (EDV) index and concentricity (LVM/EDV)] in hypertensive patients.
METHODS AND RESULTS: Nine hundred thirty-nine participants in the Losartan Intervention For Endpoint reduction in hypertension (LIFE) echocardiography substudy had measurable LVM at enrolment. Patients with LVH (LVM/body surface area > /=116 g/m in men and > /=96 g/m in women) were divided into four groups; 'eccentric nondilated' (normal LVM/EDV and EDV), 'eccentric dilated' (increased EDV, normal LVM/EDV), 'concentric nondilated' (increased LVM/EDV with normal EDV), and 'concentric dilated' (increased LVM/EDV and EDV) and compared to patients with normal LVM. At baseline, 12% had eccentric nondilated, 20% eccentric dilated, 29% concentric nondilated, and 14% concentric dilated LVH, with normal LVM in 25%. Compared with the concentric nondilated LVH group, those with concentric dilated LVH had significantly lower pulse pressure/stroke index and ejection fraction; higher LVM index, stroke volume, cardiac output, left ventricular midwall shortening, left atrial volume and isovolumic relaxation time; and more had segmental wall motion abnormalities (all P < 0.05). Similar differences existed between patients with eccentric dilated and those with eccentric nondilated LVH (all P < 0.05). Compared with patients with normal LVM, the eccentric nondilated had higher LV stroke volume, pulse pressure/stroke index, Cornell voltage product and SBP, and lower heart rate and fewer were African-American (all P < 0.05).
CONCLUSION: The new four-group classification of LVH identifies dilated subgroups with reduced left ventricular function among patients currently classified with eccentric or concentric LVH.
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Citation: J Hypertens. 2013 Oct;31(10):2060-8. doi: 10.1097/HJH.0b013e328362bbd6. Link to article on publisher's site
Journal of hypertension
Bang, Casper N.; Gerdts, Eva; Aurigemma, Gerard P.; Boman, Kurt; Dahlof, Bjorn; Roman, Mary J.; Kober, Lars; Wachtell, Kristian; and Devereux, Richard B., "Systolic left ventricular function according to left ventricular concentricity and dilatation in hypertensive patients: the Losartan Intervention For Endpoint reduction in hypertension study" (2013). University of Massachusetts Medical School Faculty Publications. 743.