A simple nomogram for determination of echocardiographic left ventricular geometry.
Recent data have shown that left ventricular (LV) geometry provides additional information on the simple dichotomy of presence or absence of LV hypertrophy with regard to cardiovascular risk of hypertensive patients. A "new" class of concentric remodeling was created, identifying a rather large group of hypertensive patients who do have increased risk despite no LV hypertrophy. Because determination of LV geometry is not easy, our objective was to develop a nomogram enabling determination of LV geometry in a simple way. The geometric classification is based on the combination of increased relative wall thickness and LV hypertrophy (LV mass index > or = 125 g/m2) both of which are calculated from wall thickness and end-diastolic diameter. In the nomogram the calculated cutoff lines for relative wall thickness and left ventricular hypertrophy are plotted, forming 4 quadrants that represent the geometric classes. Two nomograms are made: 1 based on Penn convention measurement calculations and 1 based on American Society of Echocardiography convention measurements. This nomogram provides a simple way to determine LV geometry, and thus a quick assessment of the additional cardiovascular risk of the hypertensive patient. This is especially important for subjects with concentric remodeling, who would otherwise not be identified as having increased risk for cardiovascular disease.
Heesen
W F
WF
Department of Cardiology, University of Groningen, The Netherlands.
Beltman
F W
FW
Smit
A J
AJ
May
J F
JF
D004452:Echocardiography / Q000706:statistics & numerical data; D006801:Humans; D017379:Hypertrophy, Left Ventricular / Q000000981:diagnostic imaging*; D008433:Mathematics