Various Ekg readings :: essays research papers fc

Lab essay 5There are several(prenominal) different heart problems that show up as an abnormal electrocardiogram reading. For example, a heart block can occur when there is a delay in the signals coming from the SA node, AV node, or the Purkinje fibers. However, clinically the bound heart block is used to refer to an AV block. This delays or alone stops communication between the atria and the ventricles. AV block is shown on the electrocardiogram as a delayed or prolonged PR interval. The P wave represents the activity in the atria, and the QRS complex represents ventricular activity. This is why the PR interval shows the signal delay from the AV node. There are triplet floors of severity, and if the delay is greater than .2 seconds it is classified as first degree. Second degree is classified by several regularly spaced P waves out front each QRS complex. Third degree can be shown by P waves that have no spacing relationship to the QRS complex. Anformer(a) type of mental bl ock is chain reactor branch block. This is caused by a blockage in the load down of His, creating a delay in the electrical signals traveling down the bundle branches to reach the ventricles. This results in a slowed heart beat, or brachycardia. On an electrocardiogram reading this is shown as a prolonged QRS complex. A normal QRS is well-nigh .8-.12 seconds, and anything longer is considered bundle branch block. Another type of abnormal electrocardiogram reading is atrial fibrillation, when the atria contracts very quickly. On the EKG this is shown by no clear P waves, only many small fibrillating waves, and no PR interval to measure. This results in a rapid and irregular heartbeat. On the other hand, ventricular fibrillation is much more serious and can cause sharp death if not treated by electrical defibrillation.