?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Transient+unexpected+improvement+of+AV+conduction%3A+What+is+the+mechanism%3F%0A&rft.creator=Friedman%2C+Meir&rft.creator=Schweitzer%2C+Paul&rft.subject=Indian+Pacing+and+Electrophysiology+Journal&rft.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%2C+a+PR+interval++of+230+milliseconds%2C+and+a+left+bundle+branch+block+(Figure+1).++In+figure+2%2C+a+rhythm+strip+of+leads+V1%2C+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.++&rft.publisher=Indian+Pacing+and+Electrophysiology+Group&rft.contributor=Singh%2C+Balbir&rft.contributor=Lokhandwala%2C+Yash&rft.contributor=Francis%2C+Johnson&rft.contributor=Gupta%2C+Anup&rft.contributor=Ghosh%2C+Joydeep&rft.date=2006-07&rft.type=Journal+(Paginated)&rft.type=PeerReviewed&rft.format=text%2Fhtml&rft.identifier=http%3A%2F%2Fcogprints.org%2F5238%2F1%2Ffriedman.htm&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F5238%2F2%2Ffriedman.pdf&rft.identifier=++Friedman%2C+Meir+and+Schweitzer%2C+Paul++(2006)+Transient+unexpected+improvement+of+AV+conduction%3A+What+is+the+mechanism%3F++%5BJournal+(Paginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F5238%2F