Figure 33.11. The three degrees of Type I, AV nodal block: A.

Figure 33.11

The three degrees of Type I, AV nodal block: A. First degree. B. Second degree (Wenckebach). C. Third Degree, or complete AV dissociation. Note regular PP interval at rate of 75 bpm, and regular RR interval at rate of 55 bpm, the latter representing a junctional escape rhythm dissociated from the atrial rhythm.

From: Chapter 33, Electrocardiography

Cover of Clinical Methods
Clinical Methods: The History, Physical, and Laboratory Examinations. 3rd edition.
Walker HK, Hall WD, Hurst JW, editors.
Boston: Butterworths; 1990.
Copyright © 1990, Butterworth Publishers, a division of Reed Publishing.

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