On 2014 Jan 08, Brett Snodgrass commented:

Dear Reader,

These diffuse (minute, aka fine) connections may be consistent with the vessels of Wearn. Since we cannot definitively exclude an arteriosinusoidal vessel, using the term "vessels of Wearn" is appropriate.

It is also possible that some of the connections enter the capillary bed before entering the heart chamber. If that is the case, then it is possible that some of the connections are Thebesian connections.

For serial histologic sections, Wearn studied the arteriosinusoidal and arterioluminal vessels utilizing cold celloidin that was too thick to enter the capillaries. Wearn did note that when India ink was injected into the coronary arteries it would enter the heart chambers through numerous minute connections. Since, the ink would not permit serial histologic sections with 3D reconstruction as was used for the arteriosinusoidal and arterioluminal vessels, we may not have sufficient information to specify whether the connections are Arterio-capillary-cameral, or Arterio-capillary-venule-cameral (The venule-cameral connection would be a Thebesian vein).

Thus, when the diffuse connections are identified, we do not have sufficient data to determine whether they are arteriosinusoidal only, or whether some are arteriosinusoidal and some enter the capillary bed before entering the heart chamber. In addition, if some of the connections were arterioluminal vessels, then we would have an even more difficult time naming the radiographic finding. Thus, the term vessel of Wearn has been proposed. For additional commentary, please see. https://twitter.com/BrettSnodgrass1/status/404825015771619328 and https://twitter.com/BrettSnodgrass1/status/413860163033247744

Comments, disagreements, and suggestions are welcome.

Thank you kindly.

On 2014 Jan 08, Brett Snodgrass commented:

Dear Reader,

These diffuse (minute, aka fine) connections may be consistent with the vessels of Wearn. Since we cannot definitively exclude an arteriosinusoidal vessel, using the term "vessels of Wearn" is appropriate.

It is also possible that some of the connections enter the capillary bed before entering the heart chamber. If that is the case, then it is possible that some of the connections are Thebesian connections.

For serial histologic sections, Wearn studied the arteriosinusoidal and arterioluminal vessels utilizing cold celloidin that was too thick to enter the capillaries. Wearn did note that when India ink was injected into the coronary arteries it would enter the heart chambers through numerous minute connections. Since, the ink would not permit serial histologic sections with 3D reconstruction as was used for the arteriosinusoidal and arterioluminal vessels, we may not have sufficient information to specify whether the connections are Arterio-capillary-cameral, or Arterio-capillary-venule-cameral (The venule-cameral connection would be a Thebesian vein).

Thus, when the diffuse connections are identified, we do not have sufficient data to determine whether they are arteriosinusoidal only, or whether some are arteriosinusoidal and some enter the capillary bed before entering the heart chamber. In addition, if some of the connections were arterioluminal vessels, then we would have an even more difficult time naming the radiographic finding. Thus, the term vessel of Wearn has been proposed. For additional commentary, please see. https://twitter.com/BrettSnodgrass1/status/404825015771619328 and https://twitter.com/BrettSnodgrass1/status/413860163033247744

Comments, disagreements, and suggestions are welcome.

Thank you kindly.