Sections View Full Chapter Figures Tables Videos Full Chapter Figures Tables Videos Supplementary Content +++ ECG Findings ++ Intermittent nonconducted P waves with a constant PR interval. P-P interval is constant, and R-R interval is constant until the dropped beat. R-R interval surrounding dropped beat(s) should be an exact multiplication of the number of dropped beats (eg, double RR interval for a single dropped beat, four times the RR interval for two dropped beats, etc.). +++ Pearls ++ This type of AV nodal block is associated with disease of the conduction system distal to the AV node. A pacemaker is usually indicated. Mobitz type II block can accompany MI and has a high chance of progression to a complete heart block. ++ FIGURE 23.16A Type II Second-Degree AV Block (Mobitz II). (ECG contributor: Michael L. Juliano, MD.) Graphic Jump LocationView Full Size|Favorite Figure|Download Slide (.ppt) ++ FIGURE 23.16B The PR interval is constant (double arrows) until the dropped beat (brackets). Graphic Jump LocationView Full Size|Favorite Figure|Download Slide (.ppt) GET ACCESS TO THIS RESOURCE Sign In Username Error: Please enter User Name Password Error: Please enter Password Forgot Username? Forgot Password? Sign in via OpenAthens Sign in via Shibboleth Get Free Access Through Your Institution Contact your institution's library to ask if they subscribe to McGraw-Hill Medical Products. Access My Subscription GET ACCESS TO THIS RESOURCE Subscription Options Pay Per View Timed Access to all of AccessEmergency Medicine 24 Hour $34.95 (USD) Buy Now 48 Hour $54.95 (USD) Buy Now Best Value AccessEmergency Medicine Full Site: One-Year Individual Subscription $595 USD Buy Now View All Subscription Options