P319Right ventricular impact in patients with arterial hypertension and sigmoid interventricular septum

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Aim: An increased incidence of sigmoid interventricular septum (SIS) is noted in patients (pts) with arterial hypertension(HTN). This morphological aspect can represent an important tool to evaluate the heart in hypertensive pts. The impact of HTN in the right ventricle (RV) is still underdefined. We evaluated the repercussion of arterial hypertension in the RV (global and regionally) in patients with SIS.Methods: Retrospective study of 44 pts with essential HTN, all in sinus rhythm. 38,6% female, 60,5+-9,3 years old, body mass index 27,9+-4,22 Kg/m2. Complete echocardiographic study including tissue Doppler imaging of the RV and myocardial deformation imaging through speckle tracking. Longitudinal strain(S) and strain rate (SR) of the RV were analysed by post processing. Pts were divided in 2 groups: pts with sigmoid interventricular septum (SS) – 19 pts and without sigmoid septum (NSS) – 25 pts.Results: No differences were noted between both groups regarding age, gender, anti-hypertensive medication, number of pts with controlled arterial hypertension and number of pts with structural changes of the left ventricle (remodelling/hypertrophy).Global RV function – by tissue Doppler (RV s', RVe' and RV a'), Tei index, TAPSE, global S and SR no differences were noted between both groups. Regional RV function – the following differences were noted – table.Conclusion: A compensatory increase of the RV free wall myocardial deformation is noted in pts with SIS and HTN, counteracting a decreased myocardial deformation of the interventricular septum. Speckle tracking is a sensitive method to detect this changes, and can become an early marker of right and left ventricle longitudinal changes.

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