There’s been some Excitement about polarized bicycle interval education in cycling after the Velonews podcast, Rapid Talk, hosted 2 interviews with Dr. If many of the chambers contracted concurrently, then blood could not move through the heart because the AV valves would avoid blood stream amongst the atria and ventricles. https://julius91d21.blogzet.com/considerations-to-know-about-polarized-heart-44492920