Medicine

ABO and Rh Blood Groups Blood type is inherited from your parents and is determined by the presence or absence of certain antigens, or agglutinogens, on the surface of red blood cells. Blood plasma also contains specific antibodies, or agglutinins. These antibody molecules will react to foreign antigens causing those cells to burst, a process called hemolysis. This is why it?s important to perform blood type testing before blood transfusions. There are several types of surface antigens on blood cells, but the ABO and Rh antigens are the most common. Rh Blood Group: The Rh blood groups has two types, Rh positive and Rh negative. The Rh surface antigen is also called the D antigen. If the antigen is present, the type is Rh+ and if it is absent, the type is Rh-.

Introduction to Electrocardiography Name _______________________________ Date _______________________Pd_______ EKG or ECG stands for electrocardiogram, a test that records the electrical activity of the heart. The test is performed by placing electrodes on the skin which can detect the heart?s electrical impulses. The electrocardiograph that is produced by the test can indicate a variety of heart function irregularities. Do some research to determine what is taking place in the heart to produce the following waves on an EKG tracing. P wave: QRS complex: T wave: Each line on the x-axis of the graph represents 0.04 seconds. The normal ranges for the PR Interval and QRS Interval are listed below. Determine if this EKG represents a normal test for these waves.