Key result
Ejecting beats exerted positive effects on ventricular end-systolic pressure, exceeding isovolumic pressure by up to 18 mm Hg with small stroke volumes.
Why the study?
Does ejection affect end-systolic pressure compared to isovolumic contraction in isolated canine hearts?
Does ejection affect end-systolic pressure compared to isovolumic contraction in isolated canine hearts?
Ejection exerts both positive and negative effects on ventricular end-systolic pressure, likely due to length-dependent activation.
No takes yet. Share an insight, caveat, or question.
Ejection may enhance end-systolic pressure in isolated hearts; hypothesis-generating for ventricular mechanics and requires in vivo confirmation before clinical consideration.
Sugiura et al. (1989) studied Isolated canine heart preparations. Ejecting beats vs. Isovolumic beats having the same volume as at end systole was evaluated on End-systolic pressure. Ejecting beats exerted positive effects on ventricular end-systolic pressure, exceeding isovolumic pressure by up to 18 mm Hg with small stroke volumes.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: