Key result
Treadmill exercise significantly increased systolic strain of the right ventricular free wall apex (-18.2% to -22.3%) and mid portion (-14.1% to -22.6%) immediately post-exercise.
Why the study?
Does treadmill exercise alter regional right ventricular function as measured by 2D strain echocardiography in patients without heart failure or coronary artery disease?
Observational (n=38)
No
Does treadmill exercise alter regional right ventricular function as measured by 2D strain echocardiography in patients without heart failure or coronary artery disease?
Absolute Event Rate: -22.3% vs -18.2%
p-value: p=0.010
2D strain imaging reveals a characteristic regional pattern of increased right ventricular free wall systolic strain immediately after treadmill exercise in patients without heart failure or coronary disease.
RV strain augmentation post-exercise is quantifiable; leaves open its role in assessing RV reserve pending validation.
BACKGROUND: Function of right ventricle (RV) influences on symptoms and prognosis in various diseases. However the regional RV function analyzed with 2-dimensional (2D) strain echocardiography before and just after treadmill test has not been evaluated. The aim of this study was to show the change of regional RV function just after treadmill exercise with strain analysis. METHODS: A total of thirty eight patients who visited hospital for hypertension, chest pain or dyspnea between January 2007 and December 2010 were retrospectively analyzed (men, 47.4%; mean age, 54.9 ± 7.2 years). Treadmill exercise test and pre and post echocardiography were performed. 2D strain echocardiography was analyzed off line in RV free wall and septum. RESULTS: Mean exercise duration was 737 ± 132 sec. Tissue velocity in lateral tricuspid annulus is significantly increased in post exercise (initial, 10.5 ± 2.4 cm/sec vs. post exercise, 12.2 ± 1.8 cm/sec, p = 0.006). Systolic strain of RV free wall apex and mid portion were significantly changed in post exercise stage (free wall apex, -18.2 ± 7.6% vs. -22.3 ± 5.8%, p = 0.010; free wall mid, -14.1 ± 6.7% vs. -22.6 ± 6.8%, p = 0.022). CONCLUSION: 2D strain imaging provides a precise tool to quantify regional RV function and reveals a characteristic regional pattern of RV after treadmill exercise.
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Yoon et al. (2016) conducted an observational in Hypertension, chest pain, or dyspnea without coronary artery disease (n=38). Treadmill exercise vs. Baseline (pre-exercise) was evaluated on Systolic strain of right ventricular free wall apex (p=0.010). Treadmill exercise significantly increased systolic strain of the right ventricular free wall apex (-18.2% to -22.3%) and mid portion (-14.1% to -22.6%) immediately post-exercise.
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