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R Wave in aVL Lead is a Robust Index of Left Ventricular Hypertrophy: A Cardiac MRI Study.

Abstract：

BACKGROUND:In patients free from overt cardiac disease, R wave in aVL lead (RaVL) is strongly correlated with left ventricular mass index (LVMI) assessed by transthoracic echocardiography. The aim of the present study was to extend this finding to other settings (cardiomyopathy or conduction disorders), by comparing ECG criteria of left ventricular hypertrophy (LVH) to cardiac MRI (CMR). METHODS:In 501 patients, CMR and ECG were performed within a median-period of 5 days. CMR LVH cut-offs used were 83 g/m2 in men and 67 g/m2 in women. RESULTS:RaVL was independently correlated with LVMI in patients with or without myocardial infarction (MI) (N = 300 and N = 201, respectively). SV3 was independently correlated with LVMI and LV enlargement only in patients without MI. In the whole cohort, RaVL had area under receiver-operating characteristic curve of 0.729 (specificity 98.3%, sensitivity 19.6%, optimal cut-off 1.1 mV). The performance of RaVL was remarkable in women, in Caucasians, and in the presence of right bundle branch block. It decreased in case of MI. Overall, it is proposed that below 0.5 mV and above 1.0 mV, RaVL is sufficient to exclude or establish LVH. Between 0.5 and 1 mV, composite indices (Cornell voltage or product) should be used. Using this algorithm allowed classifying appropriately 85% of the patients. CONCLUSIONS:Our results showed that RaVL is a good index of LVH with a univocal threshold of 1.0 mV in various clinical conditions. SV3 may be combined to RaVL in some conditions, namely LV enlargement to increase its performance.

journal_name

Am J Hypertens

journal_title

American journal of hypertension

authors

Courand PY,Grandjean A,Charles P,Paget V,Khettab F,Bricca G,Boussel L,Lantelme P,Harbaoui B

doi

10.1093/ajh/hpu268

subject

Has Abstract

pub_date

2015-08-01 00:00:00

pages

1038-48

issue

8

eissn

0895-7061

issn

1941-7225

pii

hpu268

journal_volume

28

pub_type

杂志文章

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