The heart's "master pacemaker" is the sinoatrial (SA) node (Upper R-atrium). Here electrical impulses quickly spread through the R L atria. The atrioventricular (AV) node (Lower R-atrium) is stimulated. The heart's lower chamber (the ventricles) fill with blood contract. The R Bundle is His are stimulated next followed by the Purkinje fibres. The ventricles contract the blood is ejected. Any abnormalities in the heart's electrical pacing system results in a cardiac arrhythmia.
This guide features an introduction to EKGs and how they work and also includes detailed sections covering the main types of arrhythmias, such as sinus rhythms, atrial rhythms, junctional rhythms, ventricular rhythms, and heart blocks. Helpful illustrations, along with the rate, rhythm, P wave, PR interval, and QRS complex, of each rhythm covered are also included to help with identification. www.examville.com... #nursing #medicine #health #heart