Key result
High valvuloarterial impedance was not associated with reduced 5-year survival or operative and 5-year post-operative mortality in patients with low-ejection fraction, low-gradient severe aortic stenosis.
Why the study?
Does valvuloarterial impedance (Zva) predict survival in patients with low-ejection fraction, low-gradient severe aortic stenosis?
Does valvuloarterial impedance (Zva) predict survival in patients with low-ejection fraction, low-gradient severe aortic stenosis?
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In patients with low-ejection fraction, low-gradient severe aortic stenosis, valvuloarterial impedance (Zva) lacks prognostic value for mid-term survival, likely due to its high flow-dependency.
Lancellotti et al. (2011) conducted an editorial in Low-ejection fraction, low-gradient severe aortic stenosis (n=184). High valvuloarterial impedance (Zva ≥5.5 mmHg/mL/m²) vs. Low valvuloarterial impedance was evaluated on 5-year survival and operative/post-operative mortality. High valvuloarterial impedance was not associated with reduced 5-year survival or operative and 5-year post-operative mortality in patients with low-ejection fraction, low-gradient severe aortic stenosis.
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