1 Conduction System of the Heart 4
... Conduction system parts are modified cardiac muscle cells consist of: (sinoatrial) node (Pacemaker) AV (atrioventricular) node A-V (atrioventricular) bundle Bundle branches (right and left bundle branches) Purkinje fibers SA ...
... Conduction system parts are modified cardiac muscle cells consist of: (sinoatrial) node (Pacemaker) AV (atrioventricular) node A-V (atrioventricular) bundle Bundle branches (right and left bundle branches) Purkinje fibers SA ...
Regulation of Heart Rate
... Parasympathetic stimulation decreases HR markedly and decreases cardiac contractility slightly. Vagal fibers go mainly to atria. Fast heart rate (tachycardia) can decrease C.O. because there is not enough time for heart to fill during diastole. ...
... Parasympathetic stimulation decreases HR markedly and decreases cardiac contractility slightly. Vagal fibers go mainly to atria. Fast heart rate (tachycardia) can decrease C.O. because there is not enough time for heart to fill during diastole. ...
Cardiovascular System
... AV node transmits the impulse down the AV bundle. Bundle splits into branches and carries the impulse through the ventricular syncytium. They contract. ...
... AV node transmits the impulse down the AV bundle. Bundle splits into branches and carries the impulse through the ventricular syncytium. They contract. ...
TPJ 3C1 Cardiovascular System
... the circulation of blood within the heart the coronary arteries (branch off the aorta) supply blood to the heart muscle Since the coronary arteries are so small, they are easily clogged, leading to heart disease. ...
... the circulation of blood within the heart the coronary arteries (branch off the aorta) supply blood to the heart muscle Since the coronary arteries are so small, they are easily clogged, leading to heart disease. ...
Gradual Changes of ECG Waveform During and After
... The directions and magnitudes of time-normalized P, QRS, and ST vectors, and other ECG parameters analyzed during and after multistage exercise in 56 ostensibly healthy men aged 23 to 62. By selective averaging with a digital computer system a single representative beat was obtained from each stage. ...
... The directions and magnitudes of time-normalized P, QRS, and ST vectors, and other ECG parameters analyzed during and after multistage exercise in 56 ostensibly healthy men aged 23 to 62. By selective averaging with a digital computer system a single representative beat was obtained from each stage. ...
Name 5 risk factors - Gates Volunteer Ambulance Service
... A Heart Attack does not cause you to breathe too quickly or too deeply (hyperventilation) – panic does. With a heart attack you may feel a little short of breath. It is possible however, to have a heart attack and then start panicking. In this case, hyperventilation is a symptom of panic not of the ...
... A Heart Attack does not cause you to breathe too quickly or too deeply (hyperventilation) – panic does. With a heart attack you may feel a little short of breath. It is possible however, to have a heart attack and then start panicking. In this case, hyperventilation is a symptom of panic not of the ...
CCN Cardiac and Vascular Terminology Reference Guide
... Implantable Loop Recorder (ILR or loop; also called Cardiac Monitor Recorder (CMR)) - is a small device that is implanted under the skin of patients that have syncope (fainting or other symptoms such as palpitations) to determine if the cause of symptoms is from an abnormal heart rhythm. Information ...
... Implantable Loop Recorder (ILR or loop; also called Cardiac Monitor Recorder (CMR)) - is a small device that is implanted under the skin of patients that have syncope (fainting or other symptoms such as palpitations) to determine if the cause of symptoms is from an abnormal heart rhythm. Information ...
Myasthenia Gravis and the Heart
... Clinical cardiac function Few studies have clinically investigated cardiac function other than ECG in MG-patients. Johannessen found a reduced peak diastolic filling rate in 25 MG-patients without any known cardiovascular disease, hypertension, diabetes mellitus or pulmonary disease.14 Ejection frac ...
... Clinical cardiac function Few studies have clinically investigated cardiac function other than ECG in MG-patients. Johannessen found a reduced peak diastolic filling rate in 25 MG-patients without any known cardiovascular disease, hypertension, diabetes mellitus or pulmonary disease.14 Ejection frac ...
Neonatal cardiac emergencies
... acidosis. You initially suspect congenital pneumonia but then notice that his chest radiograph shows clear ‘black’ lung fields and a boot-shaped heart. What is a more likely diagnosis? Why was he apparently well for the first day? Many congenital heart diseases (CHDs) present in the neonatal period. ...
... acidosis. You initially suspect congenital pneumonia but then notice that his chest radiograph shows clear ‘black’ lung fields and a boot-shaped heart. What is a more likely diagnosis? Why was he apparently well for the first day? Many congenital heart diseases (CHDs) present in the neonatal period. ...
Cardiovascular System
... ii. Pulmonary Semilunar Valve = guards the base of the pulmonary trunk and prevents backflow into the right ventricle Leaky Valves – forces the heart to pump and re-pump the same blood doing more work than necessary and decreasing heart function ...
... ii. Pulmonary Semilunar Valve = guards the base of the pulmonary trunk and prevents backflow into the right ventricle Leaky Valves – forces the heart to pump and re-pump the same blood doing more work than necessary and decreasing heart function ...
QT- syndromes - cardiology zagazig university
... leading to longer duration of depolarizing currents. The final common pathway consists of QT prolongation, reduced repolarization reserve, and a predisposition to early after depolarizations that may trigger polymorphic VT. ...
... leading to longer duration of depolarizing currents. The final common pathway consists of QT prolongation, reduced repolarization reserve, and a predisposition to early after depolarizations that may trigger polymorphic VT. ...
Module 3 - 666 KB
... minute following the event. Certainly an arrhythmia is possible, but this would present acutely and would not be associated with lethargy earlier in the morning. The diagnosis of neurally mediated syncope is less common in the elderly patient but does occur; usually this is preceded by a prodrome of ...
... minute following the event. Certainly an arrhythmia is possible, but this would present acutely and would not be associated with lethargy earlier in the morning. The diagnosis of neurally mediated syncope is less common in the elderly patient but does occur; usually this is preceded by a prodrome of ...
non–invasive monitors - University of Manitoba
... ischemia. Coronary artery disease is often present in patients having non – cardiac surgery. An imbalance between myocardial oxygen supply and demand may lead to myocardial ischemia. The ECG is the best non-invasive perioperative monitor we have available. Most electrocardiograms used in the O.R. ut ...
... ischemia. Coronary artery disease is often present in patients having non – cardiac surgery. An imbalance between myocardial oxygen supply and demand may lead to myocardial ischemia. The ECG is the best non-invasive perioperative monitor we have available. Most electrocardiograms used in the O.R. ut ...
Healthy Heart Lesson
... Students will be able to identify the size and general location of the heart. Students will be able to identify the heart muscle and describe, in general terms, its basic function of pumping blood through the body. Fantastic link on the basic overview of the heart. http://www.mplsheart.org/kids/lets ...
... Students will be able to identify the size and general location of the heart. Students will be able to identify the heart muscle and describe, in general terms, its basic function of pumping blood through the body. Fantastic link on the basic overview of the heart. http://www.mplsheart.org/kids/lets ...
procedural report sample
... HISTORY: The patient is a «AGE» year old «SEX» that presents with recurrent syncope. There is a history of prior myocardial infarction and an ischemic cardiomyopathy with an estimated left ventricular ejection fraction of 40% by most recent echocardiography (xx/xx/20xx). Baseline electrocardiogram s ...
... HISTORY: The patient is a «AGE» year old «SEX» that presents with recurrent syncope. There is a history of prior myocardial infarction and an ischemic cardiomyopathy with an estimated left ventricular ejection fraction of 40% by most recent echocardiography (xx/xx/20xx). Baseline electrocardiogram s ...
Heart dissection Lab
... notebook. Answer the highlighted questions and write these in your notebook. Aim 1. Observe the heart structure and trace flow of blood through the heart. 2. Explain how the design of the different structures relates to its behavior. 3. Describe how the heart works as a “pump system”. ...
... notebook. Answer the highlighted questions and write these in your notebook. Aim 1. Observe the heart structure and trace flow of blood through the heart. 2. Explain how the design of the different structures relates to its behavior. 3. Describe how the heart works as a “pump system”. ...
Сardiac arrhythmias 1. The consequences of continued attack of
... to the ventricles is not carried out, atrial waves do not have constant communication with ventricular complexes thereby the PQ intervals vary continuously along the length and wave P fall into different places and often superimposed on other elements of the electrocardiogram, is typical for: a) sin ...
... to the ventricles is not carried out, atrial waves do not have constant communication with ventricular complexes thereby the PQ intervals vary continuously along the length and wave P fall into different places and often superimposed on other elements of the electrocardiogram, is typical for: a) sin ...
congenital_heart_dz_revised_1_carter
... defects (VSD,ASD,PDA) that permit mixing of the two circulations are necessary for survival ...
... defects (VSD,ASD,PDA) that permit mixing of the two circulations are necessary for survival ...
The Heart - El Camino College
... D. ___________ – pressure/stretch receptors found in the carotid and aortic arteries 1. Sensitive to changes in blood ___________ (BP) 2. When BP increases, baroreceptors signal the Cardiac Center in the medulla, which sends out a parasympathetic response, __________ heart rate 3. When BP decreases, ...
... D. ___________ – pressure/stretch receptors found in the carotid and aortic arteries 1. Sensitive to changes in blood ___________ (BP) 2. When BP increases, baroreceptors signal the Cardiac Center in the medulla, which sends out a parasympathetic response, __________ heart rate 3. When BP decreases, ...
Heart and Blood Vessel Disease after Treatment for Wilms Tumor
... condition known as cardiomyopathy. In severe cases, cardiomyopathy can lead to heart failure. The risk of heart failure is related to the dose of Adriamycin. When doses are kept below 300 mg/m2 in children, the risk of developing heart failure is less than 5%. But sometimes lower doses of Adriamycin ...
... condition known as cardiomyopathy. In severe cases, cardiomyopathy can lead to heart failure. The risk of heart failure is related to the dose of Adriamycin. When doses are kept below 300 mg/m2 in children, the risk of developing heart failure is less than 5%. But sometimes lower doses of Adriamycin ...
Rejection - University of Michigan–Flint
... Venous ECMO Purpose: used if there is heart and lung failure. Venous ECMO: Lines in jugular that take deO2 blood out, oxygenate it and then pumps it back in. Helps to improve condition for surgery ...
... Venous ECMO Purpose: used if there is heart and lung failure. Venous ECMO: Lines in jugular that take deO2 blood out, oxygenate it and then pumps it back in. Helps to improve condition for surgery ...
Perioperative Nursing Care Definition of Surgery
... bundles is the presence of specialized conduction fibers. ...
... bundles is the presence of specialized conduction fibers. ...
An Experimental Study of Burger Triangles Constructed From Toad
... Downloaded from http://circres.ahajournals.org/ by guest on June 17, 2017 ...
... Downloaded from http://circres.ahajournals.org/ by guest on June 17, 2017 ...
heart rate: a predictor of early mortality in patients with myocardial
... heart rate was divided into approximate quartiles, then mortality rates were determined for each quartile. The results indicated that the mortality rates were significantly different for the four heart rate groups, and the relationship was strongly positive. Fig. 1 indicates that there is a non lin ...
... heart rate was divided into approximate quartiles, then mortality rates were determined for each quartile. The results indicated that the mortality rates were significantly different for the four heart rate groups, and the relationship was strongly positive. Fig. 1 indicates that there is a non lin ...
Ventricular Septal Defect
... What will happen around the time of the baby’s birth? VSDs can vary in size from very small to very large. Some small VSDs close on their own and need no treatment. If the hole is large, too much blood can flow to the lungs forcing the heart to over work, making it bigger. To prevent lung and heart ...
... What will happen around the time of the baby’s birth? VSDs can vary in size from very small to very large. Some small VSDs close on their own and need no treatment. If the hole is large, too much blood can flow to the lungs forcing the heart to over work, making it bigger. To prevent lung and heart ...
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.