ECG diagnostic criteria are listed in Box 2.1.
For the tracings in the questions/figures in this section, please analyze carefully and list the important findings and possible clinical setting. Answers are found at the end of the chapter.
Second-degree atrioventricular (AV) block, Mobitz type I (AV Wenckebach). Note increasing PR interval and PR interval being the shortest after a dropped beat. Also, note that the patient has intraventricular conduction delay (IVCD) and lateral T wave inversion. Despite IVCD, it is less likely to be trifascicular block as AV Wenckebach is generally a nodal rather than infra-Hisian phenomenon.
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