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Patient
83-year-old man with severe aortic stenosis awaiting cardiac surgery; hospitalization for Adams-Stokes syncope;
Trace
Third-degree AV block pattern: sinus tachycardia (105 beats/minute) with ventricular bradycardia (40 beats/minute); atrioventricular dissociation; probable junctional escape rhythm with right bundle branch block and left anterior fascicular block;
Exergue
The diagnosis of complete AV block is defined by the complete interruption of atrioventricular conduction following a conduction block located at the level of the junction, the bundle of His or its branches. The rate and duration of the QRS vary according to the site of the escape rhythm. There is often a reflex sinus tachycardia.
The diagnosis of complete atrioventricular block is defined by the complete interruption of atrioventricular conduction and is based on the presence of an atrioventricular dissociation, the atria and the ventricles being under the control of independent pacemakers, with a ventricular rate slower