Key result
Heart failure patients had significantly increased input resistance and characteristic impedance compared to matched controls, indicating increased aortic stiffness and wave reflections.
Why the study?
Is aortic input impedance altered in patients with heart failure compared to matched controls?
Case-Control (n=20)
Is aortic input impedance altered in patients with heart failure compared to matched controls?
Heart failure is associated with increased aortic stiffness and wave reflections, which may negatively impact the pulsatile function of the failing left ventricle.
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May worsen pulsatile load in heart failure; leaves open whether impedance modulation improves outcomes.
Pepine et al. (1978) conducted a case-control in Heart failure (n=20). Heart failure (exposure) vs. Control subjects without heart failure was evaluated on Input resistance, characteristic impedance, and oscillations of impedance moduli. Heart failure patients had significantly increased input resistance and characteristic impedance compared to matched controls, indicating increased aortic stiffness and wave reflections.
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