Abstract:
BACKGROUND:Different methods of normalizing left ventricular (LV) mass for body size identify generally similar relative risks of adverse cardiovascular outcome but with variable prevalences of LV hypertrophy (H). Preliminary results from a population with high prevalence of obesity suggest that the population attributable-risk percent (PAR%) of LVH is substantially higher when LV mass is normalized for allometric power of height. METHODS:We calculated the PAR% of LVH by different definitions in the cohort of the MAssa Ventricolare sinistra nell' Ipertensione (MAVI) study (n = 1019, 62% women), a population with low prevalence of obesity (22%, with only 3% and 0.1% in class II and class III obesity, respectively). Composite fatal and nonfatal cardiovascular events occurred in 53 participants (5.2%). RESULTS:Prevalence of LVH was between 28% and 56%, with slight greater values for height-based normalization. Age- and sex-adjusted hazard ratios were comprised between 1.37 and 1.44 for different measures of LV mass index. The PAR% was not meaningfully different among the different methods of normalization (between 47% and 56%), and height-based methods showed in general a performance similar to body surface area-based normalizations. CONCLUSIONS:In a large clinical population of hypertensive subjects with low prevalence of obesity, population risk attributable to LV hypertrophy was not meaningfully different in relation to the type of normalization of LV mass for body size. Height-based methods perform as well as body surface area-based ones. We suggest that the prevalence of obesity in hypertensive populations might substantially influence differences in population risk attributable to LVH identified by different methods of normalizing LV mass.
journal_name
Am J Hypertensjournal_title
American journal of hypertensionauthors
de Simone G,Devereux RB,Maggioni AP,Gorini M,de Divitiis O,Verdecchia P,MAVI (MAssa Ventricolare sinistra nell'Ipertensione) Study Group.doi
10.1016/j.amjhyper.2005.05.027subject
Has Abstractpub_date
2005-10-01 00:00:00pages
1288-93issue
10eissn
0895-7061issn
1941-7225pii
S0895-7061(05)00980-5journal_volume
18pub_type
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