Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography

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• J Am Soc Echocardiogr · Jul 2006

  Randomized Controlled Trial

  Left ventricular chamber and myocardial systolic function reserve in patients with type 1 diabetes mellitus: insight from traditional and Doppler tissue imaging echocardiography.

  We sought to evaluate in patients with type 1 diabetes mellitus (DM1): (1) whether myocardial afterload correlates with left ventricular (LV) circumferential and longitudinal systolic function at rest and during low-dose dobutamine (LDD) infusion, and whether longitudinal and circumferential LV systolic function reserves are correlated; and (2) to explore relations between LV systolic mechanics and LV chamber output reserves. ⋯ LV longitudinal systolic function (DTI) parameters did not fall into the paradigm of the stress-shortening relationship used to describe LV contractility. However, both LV circumferential contractility and longitudinal systolic function reserves correlated with stroke index reserve during LDD.

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• J Am Soc Echocardiogr · Jul 2006

  Controlled Clinical Trial

  Severe tricuspid regurgitation shows significant impact in the relationship among peak systolic tricuspid annular velocity, tricuspid annular plane systolic excursion, and right ventricular ejection fraction.

  Peak systolic mitral annular velocities correlate with left ventricular ejection fraction (EF) regardless of mitral regurgitation severity. Peak systolic tricuspid annular velocity (RV-Sm) and tricuspid annular plane systolic excursion (TAPSE) are used to assess right ventricular (RV) EF (RVEF). We investigated whether tricuspid regurgitation (TR) affects the relationship among RV-Sm, TAPSE, and RVEF. ⋯ Severe TR has a significant impact on the relationship between RV-Sm and RVEF and between TAPSE and RVEF. TAPSE and RV-Sm in patients with severe TR show poor correlation to RVEF. When applying Doppler tissue method or TAPSE to assess RV function, severe TR is a significantly confounding factor.

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