Various Ekg readings :: essays research papers fc

Lab essay 5thither are several different heart problems that show up as an abnormal cardiogram reading. For example, a heart debar basin exit when there is a delay in the signals coming from the SA node, AV node, or the Purkinje fibers. However, clinically the term heart block is used to refer to an AV block. This delays or completely stops communication between the atria and the ventricles. AV block is shown on the EKG as a delayed or protract 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. in that respect are three degrees of severity, and if the delay is greater than .2 seconds it is classified as premier(prenominal) degree. Second degree is classified by several regularly separated P waves before each QRS complex. Third degree can be shown by P waves that have no spacing relationship to the QRS complex. another(prenominal) compositors c ase of plosive is bundle branch block. This is caused by a blockage in the bundle of His, creating a delay in the galvanising signals traveling down the bundle branches to reach the ventricles. This results in a slowed heart beat, or brachycardia. On an EKG reading this is shown as a prolonged QRS complex. A normal QRS is about .8-.12 seconds, and anything longer is considered bundle branch block. Another type of abnormal EKG reading is atrial fibrillation, when the atria contracts very quickly. On the EKG this is shown by no clear P waves, only many minor fibrillating waves, and no PR interval to measure. This results in a rapid and insurgent heartbeat. On the other hand, ventricular fibrillation is much more serious and can cause sudden death if not treated by electrical defibrillation.