Chapter 20
... Conduction System of Heart Cardiac muscle cells are autorhythmic cells because they are self-excitable. They repeatedly generate spontaneous action potentials that then trigger heart contractions. (Fig 20.10) The autonomic nervous system and hormones, such as epinephrine, do modify the heartbeat (in ...
... Conduction System of Heart Cardiac muscle cells are autorhythmic cells because they are self-excitable. They repeatedly generate spontaneous action potentials that then trigger heart contractions. (Fig 20.10) The autonomic nervous system and hormones, such as epinephrine, do modify the heartbeat (in ...
Entry levels - Hartstichting
... the relationship between pressure and flow into and out of the left and right ventricles during each phase of the cardiac cycle. CV 30. Understand how and why left sided and right sided events differ in their timing. Physiology of Cardiac Defects (Heart Sounds) (G. Ch 23) CV 31. Understand the prope ...
... the relationship between pressure and flow into and out of the left and right ventricles during each phase of the cardiac cycle. CV 30. Understand how and why left sided and right sided events differ in their timing. Physiology of Cardiac Defects (Heart Sounds) (G. Ch 23) CV 31. Understand the prope ...
The Heart Worksheet - Fullfrontalanatomy.com
... The Heart Worksheet By learning and understanding all of the items on this outline (after you fill it in), you will be prepared to answer test questions on this chapter. Consider this your Study Guide to the Heart. Place your hand over your heart. As you feel the beat of this muscular organ, think a ...
... The Heart Worksheet By learning and understanding all of the items on this outline (after you fill it in), you will be prepared to answer test questions on this chapter. Consider this your Study Guide to the Heart. Place your hand over your heart. As you feel the beat of this muscular organ, think a ...
Lesson 6. Cardiovascular Diseases - Blyth-Biology11
... • As the heart's pumping action is lost, blood may back up in other areas of the body, causing fluid to build up in the lungs, the liver, the gastrointestinal tract, and the arms and legs. • As a result, there is a lack of oxygen and nutrition to organs, which damages them and reduces their ability ...
... • As the heart's pumping action is lost, blood may back up in other areas of the body, causing fluid to build up in the lungs, the liver, the gastrointestinal tract, and the arms and legs. • As a result, there is a lack of oxygen and nutrition to organs, which damages them and reduces their ability ...
Mitral Valve Disease and Heart Failure in Dogs The heart has four
... backward from the left ventricle into the left atrium. The murmur is audible through a stethoscope and may progress in intensity as the disease progresses. Another early sign of mitral valve disease is a chronic dry, hacking cough. This occurs because the enlarging left atrium puts pressure on the b ...
... backward from the left ventricle into the left atrium. The murmur is audible through a stethoscope and may progress in intensity as the disease progresses. Another early sign of mitral valve disease is a chronic dry, hacking cough. This occurs because the enlarging left atrium puts pressure on the b ...
Cardiac Electrical Therapies
... • Defibrillation consists of delivering a therapeutic dose of electrical energy to the heart with a device called a defibrillator • Defibrillation is a nonsynchronized (untimed) delivery of energy during any phase of the cardiac cycle • This depolarizes a critical mass of the heart muscle, terminate ...
... • Defibrillation consists of delivering a therapeutic dose of electrical energy to the heart with a device called a defibrillator • Defibrillation is a nonsynchronized (untimed) delivery of energy during any phase of the cardiac cycle • This depolarizes a critical mass of the heart muscle, terminate ...
To explore the structure of a heart that is similar in size and shape to
... Draw a full-page frontal section of a human heart for your portfolio, or you may use a B & W diagram. Either way the picture should show all four chambers, all associated blood vessels, and all valves. Color it in traditional red (for oxygenated blood) and blue (deoxygenated blood). Care should be t ...
... Draw a full-page frontal section of a human heart for your portfolio, or you may use a B & W diagram. Either way the picture should show all four chambers, all associated blood vessels, and all valves. Color it in traditional red (for oxygenated blood) and blue (deoxygenated blood). Care should be t ...
Advanced Cardiac Care in the Streets Understanding EKGs
... Slide show used with permission only for the purposes of educating emergency medical providers (EMTs and Paramedics) No portion of this presentation may be reproduced, stored in a retrieval system in any form or by any means (including but not limited to electronic, mechanical, photocopying etc.) wi ...
... Slide show used with permission only for the purposes of educating emergency medical providers (EMTs and Paramedics) No portion of this presentation may be reproduced, stored in a retrieval system in any form or by any means (including but not limited to electronic, mechanical, photocopying etc.) wi ...
EKG Interpretation
... The electrical conduction system of the heart is a system of interconnected structures that allow the passage of electrical impulses through the heart muscle. These electrical impulses are generated in a specific sequence, and are the impulses that generate the wave tracing that comprise the cardia ...
... The electrical conduction system of the heart is a system of interconnected structures that allow the passage of electrical impulses through the heart muscle. These electrical impulses are generated in a specific sequence, and are the impulses that generate the wave tracing that comprise the cardia ...
EKG Interpretation WWW.RN.ORG ®
... These electrical impulses are generated in a specific sequence, and are the impulses that generate the wave tracing that comprise the cardiac rhythm strip. This specific sequence gives us the basic foundation by which rhythm strip analysis in conducted. The sinoatrial node (SA) is the primary pacem ...
... These electrical impulses are generated in a specific sequence, and are the impulses that generate the wave tracing that comprise the cardiac rhythm strip. This specific sequence gives us the basic foundation by which rhythm strip analysis in conducted. The sinoatrial node (SA) is the primary pacem ...
Pacemaker Lead Perforation during Right Ventricular Outflow Tract
... to variations in baseline depolarization pattern, size, and function of both the right and left ventricle. An analysis of lead position in different views may be required to ensure the outflow tract septal positioning. Previously reported that heart rotation increases with aging due to aortic elonga ...
... to variations in baseline depolarization pattern, size, and function of both the right and left ventricle. An analysis of lead position in different views may be required to ensure the outflow tract septal positioning. Previously reported that heart rotation increases with aging due to aortic elonga ...
Pretest-Chronic Heart Failure
... 4. The nurse prepares to administer digoxin (Lanoxin) 0.125 mg to a patient. What should ...
... 4. The nurse prepares to administer digoxin (Lanoxin) 0.125 mg to a patient. What should ...
Cardiac2
... preventing restimulation during this interval, a normal cardiac impulse cannot re-excite an already excited area of the heart ventricles: 0.25-0.30 sec another, relative refractory period of 0.05 sec, muscle is more difficult to excite, but can be stimulated ...
... preventing restimulation during this interval, a normal cardiac impulse cannot re-excite an already excited area of the heart ventricles: 0.25-0.30 sec another, relative refractory period of 0.05 sec, muscle is more difficult to excite, but can be stimulated ...
CRT Overview - February 2004
... • CRT reduces the risk of mortality and heart failure due to worsening HF • CRT + ICD reduces risk of mortality • CRT improves cardiac function and structure ...
... • CRT reduces the risk of mortality and heart failure due to worsening HF • CRT + ICD reduces risk of mortality • CRT improves cardiac function and structure ...
clinical value of unipolar chest and limb leads
... was an antero-posterior lead since it was hoped that this would register changes in a plane at right angles to the standard leads. In 1933 Wood and others found that the best results were obtained when the exploring electrode was placed either on or just internal to the apex, and they also used a le ...
... was an antero-posterior lead since it was hoped that this would register changes in a plane at right angles to the standard leads. In 1933 Wood and others found that the best results were obtained when the exploring electrode was placed either on or just internal to the apex, and they also used a le ...
File - Windsor MD1
... a high concentration of sodium ions with a low concentration of potassium ions. • Intracellularly there is high concentration of potassium ions and a low concentration of sodium ions. • The sodium-potassium pump present on the membrane, regulates the respective concentration of these ions. ...
... a high concentration of sodium ions with a low concentration of potassium ions. • Intracellularly there is high concentration of potassium ions and a low concentration of sodium ions. • The sodium-potassium pump present on the membrane, regulates the respective concentration of these ions. ...
Document
... myocardial conduction manifested by progressive prolongation of P wave, PR interval and QRS complex ...
... myocardial conduction manifested by progressive prolongation of P wave, PR interval and QRS complex ...
After atrial excitation, impulse travels through the AV node
... to excite the ventricle. Simultaneously atria are contracting, and by the time ventricular activation is complete, atrial contraction is already over (QRS ECG). Ventricular pressure curve sharply increases shortly ...
... to excite the ventricle. Simultaneously atria are contracting, and by the time ventricular activation is complete, atrial contraction is already over (QRS ECG). Ventricular pressure curve sharply increases shortly ...
Microvolt T-wave Alternans - the Sudden Cardiac Arrest Association
... alternans via altered calcium cycling that occurs in cardiac myocytes when perfusion is reduced [11, 12]. MTWA detected during stress testing, particularly in the context of ST changes or symptoms, may indicate the presence of active ischemia that is especially arr ...
... alternans via altered calcium cycling that occurs in cardiac myocytes when perfusion is reduced [11, 12]. MTWA detected during stress testing, particularly in the context of ST changes or symptoms, may indicate the presence of active ischemia that is especially arr ...
Back to A+P II
... 1. Once you have saved the data, click on the Analyze menu and choose Examine. A cursor line will appear on the graph and a box will appear in the upper left corner displaying voltage (V) and time (sec.). Moving the line allows you to measure voltage and time (distance) on the graph. We are only int ...
... 1. Once you have saved the data, click on the Analyze menu and choose Examine. A cursor line will appear on the graph and a box will appear in the upper left corner displaying voltage (V) and time (sec.). Moving the line allows you to measure voltage and time (distance) on the graph. We are only int ...
EKG Sensor - Skolebutik
... EasyData App This calculator application for the TI-83 Plus and TI-84 Plus can Plus can be used with CBL 2, LabPro, and Vernier EasyLink. We recommend version 2.0 or newer, which can be downloaded from the Vernier web site, www.vernier.com/easy/easydata.html, and then transferred to the calculator. ...
... EasyData App This calculator application for the TI-83 Plus and TI-84 Plus can Plus can be used with CBL 2, LabPro, and Vernier EasyLink. We recommend version 2.0 or newer, which can be downloaded from the Vernier web site, www.vernier.com/easy/easydata.html, and then transferred to the calculator. ...
Electrocardiography
Electrocardiography (ECG or EKG*) is the process of recording the electrical activity of the heart over a period of time using electrodes placed on a patient's body. These electrodes detect the tiny electrical changes on the skin that arise from the heart muscle depolarizing during each heartbeat.In a conventional 12 lead ECG, ten electrodes are placed on the patient's limbs and on the surface of the chest. The overall magnitude of the heart's electrical potential is then measured from twelve different angles (""leads"") and is recorded over a period of time (usually 10 seconds). In this way, the overall magnitude and direction of the heart's electrical depolarization is captured at each moment throughout the cardiac cycle. The graph of voltage versus time produced by this noninvasive medical procedure is referred to as an electrocardiogram (abbreviated ECG or EKG).During each heartbeat, a healthy heart will have an orderly progression of depolarization that starts with pacemaker cells in the sinoatrial node, spreads out through the atrium, passes through the atrioventricular node down into the bundle of His and into the Purkinje fibers spreading down and to the left throughout the ventricles. This orderly pattern of depolarization gives rise to the characteristic ECG tracing. To the trained clinician, an ECG conveys a large amount of information about the structure of the heart and the function of its electrical conduction system. Among other things, an ECG can be used to measure the rate and rhythm of heartbeats, the size and position of the heart chambers, the presence of any damage to the heart's muscle cells or conduction system, the effects of cardiac drugs, and the function of implanted pacemakers.