Key result
Vector flow mapping combined with exercise stress echocardiography revealed that patients with mild coronary artery stenosis had lower energy loss reserve and reserve rates than controls.
Why the study?
To evaluate left ventricular energy loss, energy loss reserve, and energy loss reserve rate in patients with mild coronary artery stenosis using vector flow mapping combined with exercise stress echocardiography.
Does vector flow mapping combined with exercise stress echocardiography identify altered left ventricular energy loss in patients with mild coronary artery stenosis?
Case-Control (n=70)
Does vector flow mapping combined with exercise stress echocardiography identify altered left ventricular energy loss in patients with mild coronary artery stenosis?
Vector flow mapping combined with exercise stress echocardiography can detect impaired left ventricular energy loss reserve in patients with mild coronary artery stenosis, providing a potential novel marker for cardiac function evaluation.
Answers are grounded in this paper and cite their sources.
May support vector flow mapping with stress echo to detect reduced energy loss reserve in mild stenosis; hypothesis-generating pending prospective validation.
OBJECTIVES: To evaluate the left ventricular energy loss (EL), energy loss reserve (EL-r), and energy loss reserve rate in patients with mild coronary artery stenosis by using vector flow mapping (VFM) combined with exercise stress echocardiography. METHODS: A total of 34 patients (case group) with mild coronary artery stenosis and 36 sex and age matched patients (control group) without coronary artery stenosis according to coronary angiogram were prospectively enrolled. The total energy loss (ELt), basal segment energy loss (ELb), middle segment energy loss (ELm), apical segment energy loss (ELa), energy loss reserve (EL-r), and energy loss reserve rate were recorded in the isovolumic systolic period (S1), rapid ejection period (S2), slow ejection period (S3), isovolumic diastolic period (D1), rapid filling period (D2), slow filling period (D3), and atrial contraction period (D4). RESULTS: Compared with the control group, some of the EL in the resting case group were higher; some of the EL in the case group were lower after exercise, and those during D1 ELb and D3 ELb were higher. Compared with the resting state, the total EL and the EL within the time segment in the control group were higher after exercise, except during D2 ELb. In the case group, except for during D1 ELt, ELb and D2 ELb, the total and segmental EL of each phase was mostly higher after exercise (p < .05). Compared with the control group, most of the EL-r and EL reserve rates in the case group were lower (p < .05). CONCLUSION: The EL, EL-r, and energy loss reserve rate have a certain value in the evaluation of cardiac function in patients with mild coronary artery stenosis.
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Xiao et al. (2023) conducted a case-control in Mild coronary artery stenosis (n=70). Vector flow mapping combined with exercise stress echocardiography vs. Patients without coronary artery stenosis was evaluated on Left ventricular energy loss (EL), energy loss reserve (EL-r), and energy loss reserve rate (p=< .05). Vector flow mapping combined with exercise stress echocardiography revealed that patients with mild coronary artery stenosis had lower energy loss reserve and reserve rates than controls.
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