Ekg Lab Report
Name: Nikia Martinez
Class: Biology 240L L3-1201
Assignment: Electrocardiography Lab Report
Due: April 3rd 2012
Professor: Dr. B. Schoffstall
Introduction In a normal human being the heart correctly functions by the blood first entering through the right atrium from the superior and inferior vena cava. This blood flow continues through the right atrioventricular valve into the right ventricle. The right ventricle contracts forcing the pulmonary valve to open leading blood flow through the pulmonary valve and into the pulmonary trunk. Blood is then distributed from the right and left pulmonary arteries to the lungs, where carbon dioxide is unloaded and oxygen is loaded into the blood. The blood is returned from the lungs to the left atrium by the pulmonary veins. From this step the blood in the left atrium goes through the left AV valve and into the left ventricle. Once more the left ventricle contracts and forces the aortic valve to open, the blood flows through the aortic valve and into the ascending aorta. From these actions blood in the aorta is distributed to all the organs in the body, unloading oxygen and loading carbon dioxide simultaneously. Lastly, the blood returns to the heart through the vena cava and this process is continuously happening in our bodies (Jimenez L11). The cardiac conduction system is what coordinates the beating of the heart by generating and conducting rhythmic electrical signals. The sinoatrial node (SA) is a cluster of modified cardiocytes found at the junction of the right ventricle with the superior vena cava (A. Jimenez). This is what stimulates the heart beat and sets the heart rate. “The atrioventricular node (AV) is located at the lower end of the interatrial septum near the right AV valve. This node acts as an electrical gateway to the ventricles; the fibrous skeleton acts as an insulator to prevent currents getting to the ventricles by any other route” (Saladin pg 727-728). The atrioventricular bundle or Bundle of His is
Class: Biology 240L L3-1201
Assignment: Electrocardiography Lab Report
Due: April 3rd 2012
Professor: Dr. B. Schoffstall
Introduction In a normal human being the heart correctly functions by the blood first entering through the right atrium from the superior and inferior vena cava. This blood flow continues through the right atrioventricular valve into the right ventricle. The right ventricle contracts forcing the pulmonary valve to open leading blood flow through the pulmonary valve and into the pulmonary trunk. Blood is then distributed from the right and left pulmonary arteries to the lungs, where carbon dioxide is unloaded and oxygen is loaded into the blood. The blood is returned from the lungs to the left atrium by the pulmonary veins. From this step the blood in the left atrium goes through the left AV valve and into the left ventricle. Once more the left ventricle contracts and forces the aortic valve to open, the blood flows through the aortic valve and into the ascending aorta. From these actions blood in the aorta is distributed to all the organs in the body, unloading oxygen and loading carbon dioxide simultaneously. Lastly, the blood returns to the heart through the vena cava and this process is continuously happening in our bodies (Jimenez L11). The cardiac conduction system is what coordinates the beating of the heart by generating and conducting rhythmic electrical signals. The sinoatrial node (SA) is a cluster of modified cardiocytes found at the junction of the right ventricle with the superior vena cava (A. Jimenez). This is what stimulates the heart beat and sets the heart rate. “The atrioventricular node (AV) is located at the lower end of the interatrial septum near the right AV valve. This node acts as an electrical gateway to the ventricles; the fibrous skeleton acts as an insulator to prevent currents getting to the ventricles by any other route” (Saladin pg 727-728). The atrioventricular bundle or Bundle of His is
Cited: Page Jimenez, Ana. "PowerPoint." Chapter 10 Heart. (2012): 1-34. Print. Jimenez, Ana. "PowerPoint." Chapter 11 Cardiac Control. (2012): 1-34. Print. Saladin, Kenneth. Anatomy & Physiology: The Unity of Form and Function. 6th. New York, New York: The McGraw-Hill Companies, Inc., 2012. 714-746. Schoffstall, Brenda. "BlackBoard." Barry University Student Web. Barry University School Of Science, 03 04 2012. Web. 3 Apr 2012.