How does a normal sinus rhythm appear on an EKG?

A normal sinus rhythm on an EKG is characterized by a regular rhythm and the presence of P waves that precede each QRS complex. This pattern indicates that the electrical activity is originating from the sinoatrial (SA) node, which is the natural pacemaker of the heart.

In a normal sinus rhythm, the P wave represents atrial depolarization, followed by the QRS complex, which reflects ventricular depolarization. The regularity of the rhythm shows that the heart is functioning in a coordinated manner. The consistent appearance of the P waves before each QRS complex is a key feature, ensuring that each electrical impulse initiated by the SA node results in the appropriate mechanical contraction of the heart, facilitating effective blood circulation.

Understanding this pattern is crucial for EKG technicians, as deviations from this rhythm can indicate various cardiac abnormalities that may require further investigation or intervention.