PPT-Conduction of the Heart Cardiac Cycle

Learning Objectives Explain how the heart works in relation to the conduction system Explain the cardiac cycle Explain how the two systems are linked How does the heart contract Heart is composed of cardiac muscle. Denition :Anr-cycleisdenotedby(i1i2:::ir):Example :11=(1)1cycle1212=(1)1cycle1221=(12)2cycle123321=(13)2cycle123231=(123)3cycle12344312=(1423)4cycle1234535421=(13425)5cycle12345 The process which heat or electricity is . directly. transferred through a substance when there is a difference in temperature or electrical potential. . Conduction = TOUCHING . Conduction. Convection. Refers to the events of 1 complete heart beat . Both atria & ventricles contract then relax (0.8 sec if beating 75x/min). Key terms to know. Diastole. - relaxation. Systole. - contraction. Lub-dub. Conduction problems may involve multiple directions and time-dependent conditions. Inherently complex – Difficult to determine temperature distributions. One-dimensional. . steady-state. models can represent accurately numerous engineering systems. Clinical Scenario. Case 1: . 76 year old man with head and neck cancer s/p Radical dissection with PMH of Chronic Renal Failure and patient stated morphine allergy in 10/10 pain.. Case 2: . 25 year old woman with long standing history of narcotic use for chronic back pain presenting to clinic requesting cheaper medication for pain control.. Biology 12. Did you know…. Your heart beats about 100,000 times a day. Heart Dissection. Can we find:. Inferior vena cava. Superior vena cava. Right atria. Right ventricle. Tricuspid valve. Pulmonary artery. : One complete heartbeat. . The contraction of a heart chamber is called . systole. . the relaxation of a chamber is called . diastole. . . . During ventricular systole, the aortic valve __________. Lecture 11.0 – Cardiovascular System Genalin Lagman Taguiam Lecturer Course Outcomes On completion of the week’s activity, the students should be able to identify the structures in a given diagram of the heart; Douglas Wilhelm Harder, . M.Math. . LEL. Department of Electrical and Computer Engineering. University of Waterloo. Waterloo, Ontario, Canada. ece.uwaterloo.ca. dwharder@alumni.uwaterloo.ca. © 2012 by Douglas Wilhelm Harder. Some rights reserved.. The Cardiac Conduction System is a group of specialised cells located in the wall of the heart which send electoral impulses to the cardiac muscle, causing it to contract. What happens as the heart beats?. Cardiac Arrest. A cardiac arrest occurs when the heart stops beating and breathing stops. Heart Attack. A heart attack occurs when an artery supplying blood to your heart becomes completely blocked. A patient might complain of chest pain and the heart continues to beat. 2 3 septum (Fig. and Supplementary Figs and ). ese regions, previously described as paranodal, could also be dierentiated from the working myocardium in the micro-CT data, appearing as lower atten Cardiac arrhythmias are the most common cause of death in patients with a myocardial infarction or terminal heart failure. . Normal sinus rhythm is dependent on generation of an impulse in the normal sinoatrial (SA) node pacemaker and its conduction through the atrial muscle, through the atrioventricular (AV) node, through the Purkinje conduction system, to the ventricular muscle. . . failure of the heart to pump blood adequately. Cardiac failure is manifested by two ways---. 1) . C.O.. 2) . C.O.. . . .