Sinus Node Rhythms and Arrhythmias: Difference between revisions

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These last two definitions will be discussed in the topic [[P wave morphology]].
These last two definitions will be discussed in the topic [[P wave morphology]].
Heart rhythms which are not sinus rhythm are [[arrhythmias]].
Heart rhythms which are not sinus rhythm are [[arrhythmias]].
==Interpretation of the heart rhythm==
A good stepwise approach to interprete the heart rhythm is to follow these steps:
* '''Cherchez le P''', French for ''find the P waves''.
** Do you see P waves? Leads II and V1 are often most suitable to find P waves.
** What is the [[rate]] of the P waves?
** What is the [[P wave morphology]]?
* What is the relationship between P waves and QRS complexes?
** Is every P wave followed by a QRS complex? And every QRS preceded by a P wave? In short: is there a 1:1 relation between P waves and QRS complexes?
** What is the [[Conduction|PR interval]] and does it change?
* What is the ventricular [[heart rate]]?
* What is the [[QRS morphology]]?
* What is the clinical setting?


==Sinus arrhythmias==
==Sinus arrhythmias==
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*[[Sino-atrial_exit_block|Sino-atrial exit block]]
*[[Sino-atrial_exit_block|Sino-atrial exit block]]
*[[Sick Sinus Syndrome]]
*[[Sick Sinus Syndrome]]
Arrhythmias are discussed in the [[Arrhythmia]] chapter.


If the heart rate exceeds 100 bpm, the [[Arrhythmias#Tachyarrhythmias|tachcyardia flow chart]] should be followed.
If the heart rate exceeds 100 bpm, the [[Arrhythmias#Tachyarrhythmias|tachcyardia flow chart]] should be followed.