¿Cómo reconoces un bloqueo Auriculo Ventricular de segundo grado Mobitz I

❍ What is the normal duration of the P–R interval?
0.12–0.20 seconds.
❍ What will NOT occur during the absolute refractory period?
Cardiac cells cannot be stimulated to depolarize. The absolute refractory period occurs from the onset of the QRS
complex to approximately the peak of the T wave.
❍ What are the key characteristics of first-degree AV block?
Atrial and ventricular rates are the same.
The atrial and ventricular rhythm is regular.
The P waves are normal in size and configuration with one P wave before each QRS complex.
The P–R interval is prolonged greater than 0.20 seconds but is constant.
The QRS is usually 0.10 seconds or less in duration.
❍ What is the following rhythm?
Second-degree AV block, Mobitz type I.
❍ What are the characteristics of second-degree AV block, Mobitz type I?
Rate: atrial rate is greater than ventricular rate
Rhythm: atrial rhythm is regular, ventricular rhythm is irregular
P waves: normal in size and configuration, T waves may not necessarily be followed by QRS
P–R interval: lengthens with each cycle until a P wave appears without a QRS complex
QRS: 0.10 seconds or less and is dropped periodically
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