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Circulatory System 1
... Which of the following blood vessels bring blood to the heart tissue? Carotid artery ...
... Which of the following blood vessels bring blood to the heart tissue? Carotid artery ...
M19 Lesson 11 12.2 HANDOUT
... Awesome Easy-to-Follow Handout for my lovely students… Within the heart, the sinoatrial (SA) node (the pacemaker) stimulates the muscle cells to contract and relax rhythmically. The SA node is in the right atrium. It generates an electrical signal that spreads over the atria so they contract simulta ...
... Awesome Easy-to-Follow Handout for my lovely students… Within the heart, the sinoatrial (SA) node (the pacemaker) stimulates the muscle cells to contract and relax rhythmically. The SA node is in the right atrium. It generates an electrical signal that spreads over the atria so they contract simulta ...
Cardiovascular System The Heart
... Pericardial fluid between heart layers prevents friction during the heart beat. ...
... Pericardial fluid between heart layers prevents friction during the heart beat. ...
Cardiovascular System Outline
... Located in the floor of the right atrium Delays or slows the electrical impulse Fires at a rate of 40 to 60 time per minute Can take over if the SA node is not working ...
... Located in the floor of the right atrium Delays or slows the electrical impulse Fires at a rate of 40 to 60 time per minute Can take over if the SA node is not working ...
cv_anatomy
... return it to the heart ◦ As capillaries lead away from tissues, they merge and become larger venules ◦ As venules continue to lead blood away from tissues, they merge and become larger veins ...
... return it to the heart ◦ As capillaries lead away from tissues, they merge and become larger venules ◦ As venules continue to lead blood away from tissues, they merge and become larger veins ...
EE 4BD4 Lecture 21 - McMaster University
... Pacemaker Specifications • Power supply: lithium type (iodide) long life 5 -10 years (early batteries 2 years max) • Oscillator: (fixed rate) set at 70 – 90 beats/min • Output circuit: Constant voltage 5.0 to 5.5, 500 – 600 µs duration; constant current 8 – 10 mA, 1.0 – 1.2 ms • Lead wires: inter-w ...
... Pacemaker Specifications • Power supply: lithium type (iodide) long life 5 -10 years (early batteries 2 years max) • Oscillator: (fixed rate) set at 70 – 90 beats/min • Output circuit: Constant voltage 5.0 to 5.5, 500 – 600 µs duration; constant current 8 – 10 mA, 1.0 – 1.2 ms • Lead wires: inter-w ...
Coronary Artery Disease and Low Frequency Heart Sound Signatures
... A recent study by the current group showed that coronary artery disease (CAD) alters the frequency distribution of diastolic heart sound at lower frequencies (20-125 Hz) by shifting the energy toward lower frequencies. The aim of the current study was to further study this phenomenon in a new datase ...
... A recent study by the current group showed that coronary artery disease (CAD) alters the frequency distribution of diastolic heart sound at lower frequencies (20-125 Hz) by shifting the energy toward lower frequencies. The aim of the current study was to further study this phenomenon in a new datase ...
Chapter 1
... 22. Action potentials travel down the conduction system at the rates of 40 cm/s between SA and AV nodes, and at 45 cm/s after the SA node. 23. The AV delay is about 110 ms. 24. The ECG is a recording of the heart’s electrical activity. 25. A heart rate that is too slow is called bradycardia. 26. A h ...
... 22. Action potentials travel down the conduction system at the rates of 40 cm/s between SA and AV nodes, and at 45 cm/s after the SA node. 23. The AV delay is about 110 ms. 24. The ECG is a recording of the heart’s electrical activity. 25. A heart rate that is too slow is called bradycardia. 26. A h ...
File
... There is _______________________________ blood movement between the left and right side ...
... There is _______________________________ blood movement between the left and right side ...
Slide () - AccessAnesthesiology
... AV sequential and atrial pacing are frequently employed during cardiac surgery as various degrees of heart block are often encountered perioperatively. Prolongation of the PR interval is seen in first-degree heart block here associated with the prolonged QRS complexes often seen during bundle branch ...
... AV sequential and atrial pacing are frequently employed during cardiac surgery as various degrees of heart block are often encountered perioperatively. Prolongation of the PR interval is seen in first-degree heart block here associated with the prolonged QRS complexes often seen during bundle branch ...
The Cardiovascular System - Mediapolis Community School
... from the right atrium to the right ventricle. • The pulmonary valve allows blood to leave the right ventricle and prevents backflow into the ventricular chamber. • The mitral valve permits blood to move from the left atrium to the left ventricle. • The aortic valve allows blood to move from the left ...
... from the right atrium to the right ventricle. • The pulmonary valve allows blood to leave the right ventricle and prevents backflow into the ventricular chamber. • The mitral valve permits blood to move from the left atrium to the left ventricle. • The aortic valve allows blood to move from the left ...
the quiz questions and answers as a Microsoft Word
... 2. True or False: During systole, the ventricular muscle contracts to force blood out of the chambers of the ventricles. 3. True or False: Cardiac patients and older adults should avoid isometric exercise. 4. True or False: During dynamic exercise, only a slight increase in heart rate occurs. 5. Tru ...
... 2. True or False: During systole, the ventricular muscle contracts to force blood out of the chambers of the ventricles. 3. True or False: Cardiac patients and older adults should avoid isometric exercise. 4. True or False: During dynamic exercise, only a slight increase in heart rate occurs. 5. Tru ...
Chapter 20 I am - Mrs Smith`s Biology
... where the ventricles contract and the AV valves close. The SL valves open and blood is pushed from the heart QRS Wave ...
... where the ventricles contract and the AV valves close. The SL valves open and blood is pushed from the heart QRS Wave ...
Long term responses of exercise on the cardiovascular system
... • If you want to get a Merit, – Extend your description to include an explanation of how the cardiovascular system responds when we start to exercise and after 6 weeks of training. – You will need to provide some examples from sport in general and football in particular here. ...
... • If you want to get a Merit, – Extend your description to include an explanation of how the cardiovascular system responds when we start to exercise and after 6 weeks of training. – You will need to provide some examples from sport in general and football in particular here. ...
Note for circulatory - Raleigh Charter High School
... i. Away from the heart ii. Oxygen rich except in pulmonary circuit and in fetus iii. Thicker wall as it is under higher velocity and pressure than veins c. Capillaries i. Very small places of exchange and thin walled ii. Connect arteries and veins iii. More surface area, slow flow and tight fit lead ...
... i. Away from the heart ii. Oxygen rich except in pulmonary circuit and in fetus iii. Thicker wall as it is under higher velocity and pressure than veins c. Capillaries i. Very small places of exchange and thin walled ii. Connect arteries and veins iii. More surface area, slow flow and tight fit lead ...
HEART SOUNDS
... contraction and relaxation of the heart • Blood moves from higher pressure to lower pressure ...
... contraction and relaxation of the heart • Blood moves from higher pressure to lower pressure ...
2013 kcse nyando bio..
... d) i) presence of absiscic acid; Acc presence of germination inhibitors. Embryo not fully developed; Absence of hormones/enzymes that stimulate germination; impermeable seed coat; (Any two) ii) Unsuitable temperature/lack of suitable temp/ unfavourable temperature; Lack of water; Absence of light; ...
... d) i) presence of absiscic acid; Acc presence of germination inhibitors. Embryo not fully developed; Absence of hormones/enzymes that stimulate germination; impermeable seed coat; (Any two) ii) Unsuitable temperature/lack of suitable temp/ unfavourable temperature; Lack of water; Absence of light; ...
Myocardial infarction
![](https://commons.wikimedia.org/wiki/Special:FilePath/AMI_scheme.png?width=300)
Myocardial infarction (MI) or acute myocardial infarction (AMI), commonly known as a heart attack, occurs when blood flow stops to a part of the heart causing damage to the heart muscle. The most common symptom is chest pain or discomfort which may travel into the shoulder, arm, back, neck, or jaw. Often it is in the center or left side of the chest and lasts for more than a few minutes. The discomfort may occasionally feel like heartburn. Other symptoms may include shortness of breath, nausea, feeling faint, a cold sweat, or feeling tired. About 30% of people have atypical symptoms, with women more likely than men to present atypically. Among those over 75 years old, about 5% have had an MI with little or no history of symptoms. An MI may cause heart failure, an irregular heartbeat, or cardiac arrest.Most MIs occur due to coronary artery disease. Risk factors include high blood pressure, smoking, diabetes, lack of exercise, obesity, high blood cholesterol, poor diet, and excessive alcohol intake, among others. The mechanism of an MI often involves the rupture of an atherosclerotic plaque, leading to complete blockage of a coronary artery. MIs are less commonly caused by coronary artery spasms, which may be due to cocaine, significant emotional stress, and extreme cold, among others. A number of tests are useful to help with diagnosis, including electrocardiograms (ECGs), blood tests, and coronary angiography. An ECG may confirm an ST elevation MI if ST elevation is present. Commonly used blood tests include troponin and less often creatine kinase MB.Aspirin is an appropriate immediate treatment for a suspected MI. Nitroglycerin or opioids may be used to help with chest pain; however, they do not improve overall outcomes. Supplemental oxygen should be used in those with low oxygen levels or shortness of breath. In ST elevation MIs treatments which attempt to restore blood flow to the heart are typically recommended and include angioplasty, where the arteries are pushed open, or thrombolysis, where the blockage is removed using medications. People who have a non-ST elevation myocardial infarction (NSTEMI) are often managed with the blood thinner heparin, with the additional use angioplasty in those at high risk. In people with blockages of multiple coronary arteries and diabetes, bypass surgery (CABG) may be recommended rather than angioplasty. After an MI, lifestyle modifications, along with long term treatment with aspirin, beta blockers, and statins, are typically recommended.Worldwide, more than 3 million people have ST elevation MIs and 4 million have NSTEMIs each year. STEMIs occur about twice as often in men as women. About one million people have an MI each year in the United States. In the developed world the risk of death in those who have had an STEMI is about 10%. Rates of MI for a given age have decreased globally between 1990 and 2010.