J. R. Ortale

J. R. Ortale is the first named author of a primary anatomical study of the coronary sinus and its tributary veins. The paper's byline uses these initials. Ortale and colleagues dissected 37 formalin-fixed adult human hearts, recording venous connections and relationships between veins and arteries.^[ref]

The observations make anatomical variation concrete. The small cardiac vein was present in 54% of examined specimens, and a connection of approximately 1 mm calibre between anterior and posterior interventricular veins was found in 19%. These are specimen observations, not universal drawings of one invariant venous arrangement.^[ref] An artery's familiar route does not uniquely determine the course of an adjacent vein.

Sampling limits in anatomical variant frequencies distinguish an observed absence from a universal absence. In an original hypothetical example, suppose a different variant is seen zero times in 37 independent, representative specimens. Under a binomial distribution model, a population frequency $p$ gives probability $(1-p{)}^{37}$ of that observation. Solving $(1-p{)}^{37}=0.05$ gives $p\approx 0.0778$: even zero observed cases would be compatible with a one-sided 95% upper bound near 7.8% under those assumptions. This hypothetical calculation is not a result reported in Ortale's paper, and its sampling assumptions need justification.

Dissection establishes visible structural relationships in preserved specimens. It does not directly measure living blood flow, pressure or whether a particular connection carries a substantial flow under a given condition. The study's value is therefore both anatomical and methodological: document what was observed, distinguish prevalence in the specimen set from a population claim, and keep structural evidence separate from a physiological flow measurement.