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Sinus Node Rhythms and Arrhythmias: Difference between revisions
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[[Image:geleidingssysteem.jpg|thumb|The conduction system handles the spreading of an electrical signal through the heart. The normal sinus rhythm begins in the sinus node and goes via the AV node to the His bundle where it splits via the right and left bundle branch.]] | [[Image:geleidingssysteem.jpg|thumb|The conduction system handles the spreading of an electrical signal through the heart. The normal sinus rhythm begins in the sinus node and goes via the AV node to the His bundle where it splits via the right and left bundle branch.]] | ||
[[Image:QRSverklaring.jpg|thumb| During normal sinus rhythm, every atrial contraction (P-wave) is followed by a ventricular contraction (QRS complex).]] | |||
[[Image:normalSR.jpg|thumb|Normal sinus rhythm with a positive P-wave in I, II and AVF, and a biphasic P-wave in V1.]] | |||
This part is about the normal ECG. The normal heart rhythm is sinus rhythm. That means that the rhythm has its origin in the sinal node, the heart's fastest physiological impulse generator. | This part is about the normal ECG. The normal heart rhythm is sinus rhythm. That means that the rhythm has its origin in the sinal node, the heart's fastest physiological impulse generator. | ||
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With this knowledge it is quite simple to recognise normal sinus rhythm on the ECG. | With this knowledge it is quite simple to recognise normal sinus rhythm on the ECG. | ||
Criteria for normal sinus rhythm (see also [[Basics]]): | |||
*A P-wave (atrial contraction) precedes the QRS complex | *A P-wave (atrial contraction) precedes the QRS complex | ||
*Every P is followed by a QRS complex | *Every P is followed by a QRS complex | ||