Sections View Full Chapter Figures Tables Videos Annotate 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||Download Slide (.ppt) ++ FIGURE 23.16B The PR interval is constant (double arrows) until the dropped beat (brackets). Graphic Jump LocationView Full Size||Download Slide (.ppt) Your Access profile is currently affiliated with '[InstitutionA]' and is in the process of switching affiliations to '[InstitutionB]'. Please click ‘Continue’ to continue the affiliation switch, otherwise click ‘Cancel’ to cancel signing in. Get Free Access Through Your Institution Learn how to see if your library subscribes to McGraw Hill Medical products. Subscribe: Institutional or Individual Sign In Username Error: Please enter User Name Password Error: Please enter Password Forgot Password? Forgot Username? Sign in via OpenAthens Sign in via Shibboleth You already have access! Please proceed to your institution's subscription. Create a free a profile for additional features.