Lesson

Lesson 2: Atrial Rhythms

There are a number of different atrial rhythms:

Normal Sinus Rhythm:

This rhythm is the most commonly seen, notable for its regularity, present p-waves, short PR interval, and narrow QRS complex.

Sinus Tachycardia:

The same as a normal sinus rhythm, the only difference with the sinus tachycardia is its high rate (generally greater than 100 beats per minute).

Sinoatrial Block:

Unlike the previous rhythms, this rhythm is irregular, with dropped beats in the same pattern as the underlying heart rhythm.

Sinus Arrest:

Similar to the sinoatrial block, the sinus arrest has a different rate following the arrest, rather than the same underlying rhythm.

Atrial Flutter:

Distinguished by its sawtooth appearance (known as F-waves instead of P-waves), atrial flutter is an irregular rhythm where the atria beat much faster than the ventricles, but the ventricles continue to contract in an organized, regular manner.

Atrial Fibrillation:

A common rhythm among the elderly, atrial fibrillation occurs when the atria are beating irregularly and out of sync with the ventricles. The result is an irregularly irregular rhythm where various atrial pulses (again referred to as F-waves) signal the ventricular response.

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Creative Commons License The Video "Normal Sinus Rhythm ECG" is reproduced with written permission by EMTPrep. To see comments and other related activities please visit http://www.emtprep.com.

Creative Commons License The Video "Sinus Tachycardia" is reproduced with written permission by EMTPrep. To see comments and other related activities please visit http://www.emtprep.com.

Creative Commons License The Video "Sinoatrial Block" is reproduced with written permission by EMTPrep. To see comments and other related activities please visit http://www.emtprep.com.

Creative Commons License The Video "Atrial Flutter" is reproduced with written permission by EMTPrep. To see comments and other related activities please visit http://www.emtprep.com.

Creative Commons License The Video "Atrial Fibrillation" is reproduced with written permission by EMTPrep. To see comments and other related activities please visit http://www.emtprep.com.