Exam 6: P-Waves

P' waves that continuously change in appearance indicate that the:

Your 85 year old patient has a heart rate of 70 BPM. Analysis of the ECG reveals a slightly irregular rhythm with one P wave preceding each narrow QRS complex. The appearance of the P waves appears to change as often as from beat to beat. This is likely the result of:

Your 33 year old patient has a heart rate of 150 BPM. Analysis of the ECG reveals a regular rhythm with a tall upright P wave preceding each narrow QRS complex. The P waves are partially buried in the T wave of the preceding beat. This is likely the result of:

Your 72 year old patient has a heart rate of 82 BPM. Analysis of the ECG reveals a totally irregular rhythm with a chaotic appearing baseline preceding each narrow QRS complex. This is likely the result of:

P waves that originate in the SA node but conduct abnormally through altered, damaged atria should look normal.

The third step of analyzing an ECG rhythm should be to:

In faster sinus tachycardias, the P wave can sometimes be buried in the T wave of the preceding beat.

Biphasic P waves are normal in lead V1.

Characteristics of normal P waves include:

The P- wave is absent with a blocked early beat that arises from the atria.

Inverted P' waves occur when the:

Normal P waves are those that:

In lead II, the deflection of the P wave is characteristically:

The waveforms seen when the atria fire in excess of 350 BPM are referred to as f waves.

Premature beats that arise from the atria or internodal pathways produce P' waves that:

When the P waves seem to "march through" the QRS complexes it indicates:

The P' waves in tachycardia arising from the atria:

P' that occur with impulses arising from or near the AV junction:

When the atria fire faster than 350 beats per minute:

Notched or wide (enlarged) P waves may be seen with increased left atrial pressure and right atrial enlargement.