Valvuloarterial impedance – parameter of overall load in aortic stenosis and hypertension
نویسندگان
چکیده
منابع مشابه
Valvuloarterial impedance in aortic stenosis: look at the load, but do not forget the flow.
The vast majority of patients with severe calcified aortic stenosis (AS) have normal left ventricular (LV) ejection fraction, even in the presence of symptoms. Nevertheless, ≈20% of patients with AS and undergoing valve surgery were found with reduced LV ejection fraction (,50%) in the last Euro Heart Survey. This characteristic is often the result of a concomitant coronary artery disease. In s...
متن کاملValvuloarterial impedance, but not aortic stenosis severity, predicts syncope in patients with aortic stenosis.
BACKGROUND The presence of syncope in patients with aortic valve stenosis (AS) predicts a grave prognosis. However, the evaluation of AS severity has been limited to valve-specific factors such as aortic valve area and mean transaortic pressure gradient. Recently, valvuloarterial impedance (Zva) was proposed for the estimation of global left ventricular afterload. Therefore, because predictors ...
متن کاملImpact of Valvuloarterial Impedance on Concentric Remodeling in Aortic Stenosis and Its Regression after Valve Replacement
BACKGROUND Left ventricle (LV) in patients with aortic stenosis (AS) faces a double hemodynamic load incorporating both valvular stenosis and reduced systemic arterial compliance (SAC). This study aimed to evaluate the impact of global LV afterload on LV hypertrophy (LVH) before and after aortic valve replacement (AVR). METHODS The study cohort included 453 patients (247 males; mean age, 64 ±...
متن کاملDoes valvuloarterial impedance impact prognosis after surgery for severe aortic stenosis in the elderly?
BACKGROUND Valvuloarterial impedance (Zva) was introduced as a prognostic measure in patients with aortic stenosis (AS). However, it is unclear whether Zva has a prognostic impact on survival after surgical aortic valve replacement (AVR) in patients with severe AS with preserved ejection fraction (EF). METHODS We retrospectively reviewed 929 consecutive patients who had AVR. We investigated 1...
متن کاملValvuloarterial impedance does not improve risk stratification in low-ejection fraction, low-gradient aortic stenosis: results from a multicentre study.
OBJECTIVES In a multicentre series of patients with low-ejection fraction/low-gradient aortic stenosis (LEF/LGAS), we evaluated the prognostic impact of valvuloarterial impedance (Zva). BACKGROUND Zva in AS, a measure of global afterload taking into account systemic arterial compliance, has been proposed for risk stratification in paradoxical LGAS. We hypothesized that Zva could help risk str...
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ژورنال
عنوان ژورنال: Cardiologia Croatica
سال: 2013
ISSN: 1848-543X,1848-5448
DOI: 10.15836/ccar.2013.199