title: Transient unexpected improvement of AV conduction: What is the mechanism? creator: Friedman, Meir creator: Schweitzer, Paul subject: Indian Pacing and Electrophysiology Journal description: 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. publisher: Indian Pacing and Electrophysiology Group contributor: Singh, Balbir contributor: Lokhandwala, Yash contributor: Francis, Johnson contributor: Gupta, Anup contributor: Ghosh, Joydeep date: 2006-07 type: Journal (Paginated) type: PeerReviewed format: text/html identifier: http://cogprints.org/5238/1/friedman.htm format: application/pdf identifier: http://cogprints.org/5238/2/friedman.pdf identifier: Friedman, Meir and Schweitzer, Paul (2006) Transient unexpected improvement of AV conduction: What is the mechanism? [Journal (Paginated)] relation: http://cogprints.org/5238/