Key points are not available for this paper at this time.
Design
Review
Revives apex cardiogram 'A' wave for aortic valve assessment; extends historical observations but leaves open modern validation.
No abstract yet. The journal hasn't published one we can show.
No takes yet. Share an insight, caveat, or question.
Epstein et al. (1968) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: