In second-degree type II AV nodal block (a.k.a. Mobitz Type II AV block ... three consecutive P waves may be followed by a QRS complex, giving the ECG a normal appearance, then the fourth ...
This ECG has both second degree AV block with 2:1 block and second degree type I AV block ... Note the irregular R-R intervals making 3rd degree heart block unlikely. The rhythm on this ECG ...
Type I second-degree ... QRS type II block may be a type I variant. Failure to suspect type I block in the presence of miniscule increments of the PR interval is an important pitfall in the diagnosis ...
Patients who had symptomatic (fatigue, faintness, dyspnea, and syncope) type II second- or third-degree AV block, 2:1 AV block, atrial fibrillation with bradycardia (average heart rate ≤40 beats ...
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