Key result
Prolonged nonpulsatile left heart bypass caused a significant decrease in the systemic vascular resistance response to phenylephrine compared to pulsatile bypass.
Why the study?
Does prolonged nonpulsatile left heart bypass reduce vasoconstrictive function compared to pulsatile left heart bypass in a goat model?
Population
11 goats undergoing left heart bypass
Comparison
Nonpulsatile left heart bypass for 4 weeks vs Pulsatile left heart bypass continued for 4 weeks
Design
Preclinical
Follow-up
6 weeks
Authors
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Nonpulsatile bypass may impair vasoconstrictor responsiveness; leaves open whether pulsatility matters in human mechanical circulatory support.
Does prolonged nonpulsatile left heart bypass reduce vasoconstrictive function compared to pulsatile left heart bypass in a goat model?
Prolonged nonpulsatile left heart bypass causes a significant decrease in systemic vascular resistance response to phenylephrine, indicating diminished vasoconstrictive function.
Nishinaka et al. (2001) studied Left heart bypass (n=11). Nonpulsatile left heart bypass (NLHB) vs. Pulsatile left heart bypass (PLHB) was evaluated on Systemic vascular resistance response to phenylephrine (SVRmax and DeltaSVR). Prolonged nonpulsatile left heart bypass caused a significant decrease in the systemic vascular resistance response to phenylephrine compared to pulsatile bypass.
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