Arrhythmias References Wolff, Parkinson, and White. Bundle-Branch Block with Short P-R Interval in Healthy Young People Prone to Paroxysmal Tachycardia, 1930. [PDF] Share this: Click to print (Opens in new window) Print Click to email a link to a friend (Opens in new window) Email Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Like this:Like Loading...