Why the study?
What are the limiting factors of peak and submaximal exercise capacity in patients with CF-LVAD?
What are the limiting factors of peak and submaximal exercise capacity in patients with CF-LVAD?
In CF-LVAD patients, the device supports submaximal exercise, but residual ventricular function is crucial for sustaining hemodynamics during peak exertion.
Pre-implant HF duration may differentially limit peak vs submaximal capacity after CF-LVAD; leaves open optimal timing and residual-function targets for prospective study.
Overall, both %6MWD and %VO2p depend on the duration of heart failure prior to CF-LVAD implantation. %6MWD is primarily determined by parameters underlying the patient's general condition, while %VO2p mostly relies on the residual function and chronotropic response of the heart. Moreover, since %VO2p was relatively lower compared to %6MWD, we might infer that CF-LVAD can support submaximal exercise but is not sufficient during peak exertion. Hence concluding that the contribution of the ventricle is crucial in sustaining hemodynamics at peak exercise.
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Fresiello et al. (2020) studied this question.
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