Abstract 417: Correlation Between The Mass Of The Left Ventricle By Echocardiogram And The Electrocardiographic And Vectorcardiographic Criteria In Left Ventricular Hypertrophy In Patients With Resistant Hypertension.

Abstract

The difficult of most of patients in access the echocardiogram (ECHO) diagnosis services are common in small cities located far away from reference towns centers. Graphics methods (GM) , like electrocardiogram (ECG) and vectorcardiogram (VCG), have high sensibility but low specificity in detect LVH. The ECHO diagnosis criterion of LVH based on indexed left ventricular mass (LVMI), is usual and used now a days beside other methods like Nuclear Magnetic Ressonance. Objectives: Evaluate LVMI correlation with ECG and VCG criteria in patients with RHTN. Population: 120 RHTN patients were evaluated. Excluded patients with diseases: diabetes, valve heart, coronary, Chagas, renal, obese and excentric LVH. Study Protocol: After 06 months, between 2008& 2011, measures BP monthly following the technique (JNC-VII) and receive directions, as well as pill counts (the method of Taylor) to assess compliance. Underwent echocardiography, following the recommendations of the ASE, then ECG and VCG. Formula to calculate LVMI : LVMI = 0,8 x{1.04x [(SIVD + DDVE + PPVED)3 - (DDVE)3]} + 0,6 g/(M-60) x 0,01 + H) ECG and VCG criteria to detect LVH: ECG Criterion: Sokolow-Lyon I(SL-I):SV1+RV5(6)≥3.5mV & II(SL-II):RavL≥1.1mV; Gübner(G):SDI+RDIII≥2.5mV; Cornell(C):RavL+SV3≥2/2.8mV(woman/man); Romhilt-Estes(RE):Point Score≥5points; Perugia(P): RE or C(modify) or Strain. VCG Criterion: Mag Max QRS on Planes horizontal(HP) & frontal(FP): vector≥2mV and right saggital(rSP): vector≥1.6 mV; Defl QRS HP & rSP: angle≥ 330° & ≥150°. Statistical Analysis: The correlations were obtained using the Pearson’s correlation formula and the is considered a good correlation values above 50%, and excellent correlation values above 70%. Values less than 50% are considered weak correlation. Results are expressed as mean and standard deviation, and relative values in percentage. Results: Criterion Correlation R SL- I 0.49 G 0.42 SL-II 0.50 C 0.49 RE 0.51 Mag Max QRS HP 0,59 Mag Max QRS rSP 0.60 Mag Max QRS FP 0.51 Defl QRS PH 0.33 Defl QRS rSP 0.56 Conclusion: The better correlation between LVMI and ECG criterion was Romhilt-Estes and the better for the VCG was Mag Max QRS HP. The VCG had the best correlation. Considered a good alternative to estimate the LVMI.