ABSTRACT
OBJECTIVES: To evaluate the relation of echocardiographic parameters of diastolic function, exercise capacity (expressed as peakVO(2)) and NT-proBNP in patients with transposition of the great arteries (TGA) and Mustard procedure. METHODS: Diastolic function was determined by measuring tricuspid flow velocities (Ea/Aa ratio), isovolumic relaxation time (IVRT), and deceleration time (DT). E/Ea ratios were calculated. For assessment of systolic function, CMR was applied. RESULTS: E/A (r = 0.07, p = 0.66), E/Ea medial (r = 0.03, p = 0.84), E/Ea lateral (r = -0.01, p = 0.92), IVRT (r = -0.13, p = 0.44), and DT (r = -0.05, p = 0.76) were not correlated with peakVO(2). NT-proBNP showed a significant correlation with IVRT (r = 0.44, p = 0.004) and Ea/Aa medial (r = -0.34, p = 0.025). No correlation was found between RV systolic function and peakVO(2) (r = 0.07, p = 0.63). CONCLUSIONS: Exercise capacity in patients with TGA and Mustard procedure is not related to echocardiographic parameters of diastolic function. NT-proBNP is associated with selected echocardiographic parameters of diastolic function.
Subject(s)
Cardiac Surgical Procedures/methods , Exercise Tolerance/physiology , Natriuretic Peptide, Brain/blood , Peptide Fragments/blood , Transposition of Great Vessels , Adult , Biomarkers/blood , Diastole/physiology , Echocardiography , Exercise Test , Female , Humans , Male , Oxygen Consumption/physiology , Systole/physiology , Transposition of Great Vessels/diagnostic imaging , Transposition of Great Vessels/physiopathology , Transposition of Great Vessels/surgery , Ventricular Function, Right/physiologyABSTRACT
BACKGROUND: Symptomatic severe aortic stenosis is associated with increased mortality and morbidity. Early identification of these patients by echocardiography is crucial. We conducted this study to evaluate a handheld ultrasound device (HCU) in patients with suspected severe aortic stenosis (AS) in comparison to a standard echocardiography device (SE). METHODS: A HCU (Vivid I; GE Healthcare) and a SE device (Philips iE 33) were used to evaluate 50 consecutive patients with suspected severe AS. Two consecutive echocardiographic studies were performed by two experienced and blinded examiners using HCU and SE device. AS was graded by mean transaortic pressure, aortic valve area (AVA), and indexed AVA (AVA adjusted for body surface area). RESULTS: Mean difference for mean transaortic gradient, AVA and indexed AVA for the SE and HCU device were 1.28 mmHg (-0.70 to 3.26 mmHg), -0.02 cm(2) (-0.06 to 0.01 cm(2)), and -0.01 cm(2)/m(2) (-0.03 to 0.01 cm(2)/m(2)), respectively. Discrepancies between both devices were not associated with misinterpretation of the degree of AS. CONCLUSION: Our study demonstrates that HCU can be used to evaluate patients with suspected AS. (ECHOCARDIOGRAPHY 2010;27:481-486).
