This study was designed to compare the right ventricular (RV) myocardial performance index (Tei-index) in patients with hypertrophic cardiomyopathy(HCM) and normal control subjects, as well as between obstructive and non-obstructive HCM.
Thirty eight (25 males-13 females aged 49±11 years) pts with HCM which was obstructive in 16 pts and thirty five (25males-10 females,aged 50±9 years)normal subjects were echocardiographically evaluated. The RV Tei-index was calculated from the RV systolic outflow and tricuspid inflow velocity profiles as the sum of the RV systolic isovolumic contraction and relaxation times divided by the RV ejection time.. The left ventricular (LV) mass index was also calculated by the Penn convention formula.
The mean RV Tei-index was 0,46±0,12 in HCM pts and 0,35±0,08 in normals,p<0.01. A significant correlation was observed on RV Tei-index and LV mass index(r=0,42, p<0.05). Between obstructive and non-obstructive HCM there was not significant difference on RV Tei-index (0,48±0,11 vs. 0,45±0,10 respectively,p=NS).
Conclusion: Our results show that RV Tei-index is inpaired in pts with HCM possibly due to RV diastolic dysfunction and ventricular interdependence. However the LV outflow obstruction does not deteriorate the above index.
I. Moyssakis, None.