The Heart韦素丽课件
... Base of cusps are attached to fibrous ring surrounding the atrioventricular orifice. To their free edges and ventricular surfaces are attached chordae tendineae, which connect the cusps to the papillary muscles. ...
... Base of cusps are attached to fibrous ring surrounding the atrioventricular orifice. To their free edges and ventricular surfaces are attached chordae tendineae, which connect the cusps to the papillary muscles. ...
THE HEART Dr. Ali Ebneshahidi © 2016 Ebneshahidi
... 3. Cardiac muscle contractions are always brief twitches. In skeletal muscles, contractions resulting from rapid repetitive stimulation can summate to provide sustained contraction. This can not happen in cardiac muscle because the long refractory period cancels any stimulus that occurs before the h ...
... 3. Cardiac muscle contractions are always brief twitches. In skeletal muscles, contractions resulting from rapid repetitive stimulation can summate to provide sustained contraction. This can not happen in cardiac muscle because the long refractory period cancels any stimulus that occurs before the h ...
Heart Muscle Differentiation
... more surprising that the occurrence of abnormality is so infrequent. ...
... more surprising that the occurrence of abnormality is so infrequent. ...
Cardiac Cycle - WordPress.com
... electrical potentials generated recorded with time. The result is an ECG. P wave = electrical activity during atrial systole QRS complex = electrical activity during ventricular systole T wave = ventricular repolarisation (recovery of ventricular walls) Q-T interval – contraction time (ventricles co ...
... electrical potentials generated recorded with time. The result is an ECG. P wave = electrical activity during atrial systole QRS complex = electrical activity during ventricular systole T wave = ventricular repolarisation (recovery of ventricular walls) Q-T interval – contraction time (ventricles co ...
File - CAPE Biology Unit 1 Haughton XLCR 2013
... heart has to function properly, the cardiac muscle needs a special electrical system for sending the correct signals to the corresponding muscle at the appropriate time. This then means that without a delay between the atrium and the ventricles for ensuring that all the blood is pumped out of the he ...
... heart has to function properly, the cardiac muscle needs a special electrical system for sending the correct signals to the corresponding muscle at the appropriate time. This then means that without a delay between the atrium and the ventricles for ensuring that all the blood is pumped out of the he ...
Tetralogy of Fallot (Repaired)
... b. It may be possible to expand the narrowed area within an artificial covering by inserting a small metal cage, called a stent, to keep the area open. c. It may also be possible to expand smaller lung arteries and keep them open by inserting a small stent ...
... b. It may be possible to expand the narrowed area within an artificial covering by inserting a small metal cage, called a stent, to keep the area open. c. It may also be possible to expand smaller lung arteries and keep them open by inserting a small stent ...
Valvular Heart Disease in the Patient Undergoing Noncardiac Surgery
... perioperatively. Short-acting β-blockers can then be used for heart rate control. Flow through a stenotic mitral valve requires a higher-than-normal pressure gradient between the left atrium and the left ventricle. Thus, reduction in preload, from the venodilatory effects of anesthesia or from blood ...
... perioperatively. Short-acting β-blockers can then be used for heart rate control. Flow through a stenotic mitral valve requires a higher-than-normal pressure gradient between the left atrium and the left ventricle. Thus, reduction in preload, from the venodilatory effects of anesthesia or from blood ...
Heart and Circulation 13
... through systemic circulation = flow rate through pulmonary circulation. ...
... through systemic circulation = flow rate through pulmonary circulation. ...
Chapter 11
... An electrocardiogram (ECG) is an instrument that can be used to record the hearts electrical activity 1.) P wave - depolarization of atria QRS complex - depolarization of ventricles T wave - repolarization of ventricles ...
... An electrocardiogram (ECG) is an instrument that can be used to record the hearts electrical activity 1.) P wave - depolarization of atria QRS complex - depolarization of ventricles T wave - repolarization of ventricles ...
Cardiovascular System
... The heart is inside the thorax between the two lungs in the mediastinum Surrounding the heart is a layer called the pericardium o The pericardium has several layers: The visceral layer is attached to the heart The parietal layer is attached to the surroundings Between the two layers is a fluid ...
... The heart is inside the thorax between the two lungs in the mediastinum Surrounding the heart is a layer called the pericardium o The pericardium has several layers: The visceral layer is attached to the heart The parietal layer is attached to the surroundings Between the two layers is a fluid ...
How Your Heart Works - the University Health Network
... The coronary arteries divide into smaller branches. This is so each part of the heart muscle receives oxygen and nutrients. ...
... The coronary arteries divide into smaller branches. This is so each part of the heart muscle receives oxygen and nutrients. ...
document
... Blood pressure accounts for the flow of blood in the arteries and the arterioles Skeletal muscle contraction, valves in veins and respiratory movements account for the flow of blood in the venules and the veins Blood velocity gradually decreases further away from the heart as blood pressure decrease ...
... Blood pressure accounts for the flow of blood in the arteries and the arterioles Skeletal muscle contraction, valves in veins and respiratory movements account for the flow of blood in the venules and the veins Blood velocity gradually decreases further away from the heart as blood pressure decrease ...
Chapter 14
... - between these two sublayers is the pericardial cavity that contains pericardial fluid, a lubricating fluid that reduces friction between the layers as the heart moves. D. Layers of the Heart Wall (p. 428) 1. The wall of the heart consists of three layers: i. outer epicardium composed of mesotheliu ...
... - between these two sublayers is the pericardial cavity that contains pericardial fluid, a lubricating fluid that reduces friction between the layers as the heart moves. D. Layers of the Heart Wall (p. 428) 1. The wall of the heart consists of three layers: i. outer epicardium composed of mesotheliu ...
Intravascular Infection:
... Septicemia (sepsis) : is the invasion of bloodstream by virulent microbe and its toxins which results in acute systemic illness (SIRS and culture-documented infection). Septic shock: is a medical emergency caused by decreased blood flow and oxygen delivery to organs and tissues as a result of inflam ...
... Septicemia (sepsis) : is the invasion of bloodstream by virulent microbe and its toxins which results in acute systemic illness (SIRS and culture-documented infection). Septic shock: is a medical emergency caused by decreased blood flow and oxygen delivery to organs and tissues as a result of inflam ...
19. Cardiovascular System: Heart
... 3. Late ventricular systole. Eventually, the pressure inside the ventricles rises sufficiently to open the semilunar valves, and blood is ejected into the pulmonary trunk and the aorta. The ventricles eject a quantity of blood referred to as the stroke volume (SV). SV is usually equal to about 60% o ...
... 3. Late ventricular systole. Eventually, the pressure inside the ventricles rises sufficiently to open the semilunar valves, and blood is ejected into the pulmonary trunk and the aorta. The ventricles eject a quantity of blood referred to as the stroke volume (SV). SV is usually equal to about 60% o ...
Case
... You are working in an emergency department when a 72 year old woman presents with increasing shortness of breath over the past 12-24 hours. She has a diagnosis of heart failure after a myocardial infarction several years ago. She has been prescribed an excellent medical regimen, but she has been int ...
... You are working in an emergency department when a 72 year old woman presents with increasing shortness of breath over the past 12-24 hours. She has a diagnosis of heart failure after a myocardial infarction several years ago. She has been prescribed an excellent medical regimen, but she has been int ...
Endocarditis and Bacteremia due to Kocuria rosea Following Heart
... K.rosea is one of the total of 17 bacterial species belonging to the family Micrococcaceae (1). It is a commensal bacterium of the oropharynx, skin and mucosa in humans and it is debatable when isolated in culture whether cause of infection or not (4). However, it may rarely be an opportunistic path ...
... K.rosea is one of the total of 17 bacterial species belonging to the family Micrococcaceae (1). It is a commensal bacterium of the oropharynx, skin and mucosa in humans and it is debatable when isolated in culture whether cause of infection or not (4). However, it may rarely be an opportunistic path ...
Cardiology
... You are working in an emergency department when a 72 year old woman presents with increasing shortness of breath over the past 12-24 hours. She has a diagnosis of heart failure after a myocardial infarction several years ago. She has been prescribed an excellent medical regimen, but she has been int ...
... You are working in an emergency department when a 72 year old woman presents with increasing shortness of breath over the past 12-24 hours. She has a diagnosis of heart failure after a myocardial infarction several years ago. She has been prescribed an excellent medical regimen, but she has been int ...
MAKE UP ASSIGNMENT POLICIES
... Step 12 Obtain three or four lima beans to represent body cells. Cut about 10 to 12 pieces of thread, each about 3 centimeters long. Half of the pieces should be red. The other half should be blue. Glue one end of several red and blue threads on the surface of each bean. ...
... Step 12 Obtain three or four lima beans to represent body cells. Cut about 10 to 12 pieces of thread, each about 3 centimeters long. Half of the pieces should be red. The other half should be blue. Glue one end of several red and blue threads on the surface of each bean. ...
Heart dissection Lab
... the ventricles. The purpose of the valves is to prevent the blood from flowing backward. Using a dissecting needle (or the tip of a forceps), puncture a valve and try to lift the heart. 2- What do you observe? Explain. 4. Find out where the opening in the right ventricle leads. This artery supplies ...
... the ventricles. The purpose of the valves is to prevent the blood from flowing backward. Using a dissecting needle (or the tip of a forceps), puncture a valve and try to lift the heart. 2- What do you observe? Explain. 4. Find out where the opening in the right ventricle leads. This artery supplies ...
Chapter 19
... 1. initial SA node excitation causes contraction of both the R and L atria 2. contraction of R and L ventricles begins at APEX of heart (inferior point), ejecting blood superiorly to aorta and pulmonary artery 3. the bundle of His is the ONLY link between atrial contraction and ventricular contracti ...
... 1. initial SA node excitation causes contraction of both the R and L atria 2. contraction of R and L ventricles begins at APEX of heart (inferior point), ejecting blood superiorly to aorta and pulmonary artery 3. the bundle of His is the ONLY link between atrial contraction and ventricular contracti ...
mennonite college of nursing
... S1 = synchronous with the carotid (So if not sure of which sound is S1, feel for carotid at the same time) Splitting of S1 = mitral under more pressure, more likely to close first. No clinical significance. Split S2 = aortic closes first (“Lubb-spit”) = physiological splitting (more common than para ...
... S1 = synchronous with the carotid (So if not sure of which sound is S1, feel for carotid at the same time) Splitting of S1 = mitral under more pressure, more likely to close first. No clinical significance. Split S2 = aortic closes first (“Lubb-spit”) = physiological splitting (more common than para ...
“Dyspnea” A Cardiologist Perspective
... right ventricular systolic function. Mild left ventricular hypertrophy with mild diastolic dysfunction. The E:e’ ratio was 9. Diastolic filling pressures were reportedly normal. There was mild left atrial enlargement. Aortic sclerosis, mild mitral and tricuspid regurgitation. Mild pulmonary artery h ...
... right ventricular systolic function. Mild left ventricular hypertrophy with mild diastolic dysfunction. The E:e’ ratio was 9. Diastolic filling pressures were reportedly normal. There was mild left atrial enlargement. Aortic sclerosis, mild mitral and tricuspid regurgitation. Mild pulmonary artery h ...
Artificial heart valve
An artificial heart valve is a device implanted in the heart of a patient with valvular heart disease. When one of the four heart valves malfunctions, the medical choice may be to replace the natural valve with an artificial valve. This requires open-heart surgery.Valves are integral to the normal physiological functioning of the human heart. Natural heart valves are evolved to forms that perform the functional requirement of inducing unidirectional blood flow through the valve structure from one chamber of the heart to another. Natural heart valves become dysfunctional for a variety of pathological causes. Some pathologies may require complete surgical replacement of the natural heart valve with a heart valve prosthesis.