"5238","Transient unexpected improvement of AV conduction: What is the mechanism? ","This ECG was recorded from a 93 year old patient with a previously documented third degree AV block and an underlying LBBB. The twelve lead ECG demonstrates sinus bradycardia at a rate of 52 beats per minute, a PR interval  of 230 milliseconds, and a left bundle branch block (Figure 1).  In figure 2, a rhythm strip of leads V1, II and V5 shows sinus rhythm with AV block. Note that only P waves in the T wave of the paced beat are conducted.  The non-conducted P waves are followed by ventricular paced beats at an escape interval of 1200 milliseconds.  ","http://cogprints.org/5238/","Friedman, Meir and Schweitzer, Paul","Singh, Balbir and Lokhandwala, Yash and Francis, Johnson and Gupta, Anup and Ghosh, Joydeep","       <span class=\"person_name\">Friedman, Meir</span> and <span class=\"person_name\">Schweitzer, Paul</span>     (2006)  <a href=\"http://cogprints.org/5238/\"><em>Transient unexpected improvement of AV conduction: What is the mechanism?</em></a>       [Journal (Paginated)]           ","","2006-07"