AP Biology Lab 10: Physiology of the Circulatory System
... The circulatory system consists of blood, blood vessels, and the heart. The heart is the muscular pump that pushes blood through the blood vessels, delivering vital nutrients to the entire body. As blood passes through the vessels, it exerts pressure, causing their walls to expand slightly. As blood ...
... The circulatory system consists of blood, blood vessels, and the heart. The heart is the muscular pump that pushes blood through the blood vessels, delivering vital nutrients to the entire body. As blood passes through the vessels, it exerts pressure, causing their walls to expand slightly. As blood ...
LETHAL CARDIAC ANAPHYLAXIS IN THE RABBIT
... Certainty of Sensitization.--Rabbits are by no means as easily sensitized to a high degree as guinea pigs. While there is no difficulty in so sensitizing rabbits that the toxic injection causes a drop in blood pressure, increased heart rate, and active cecal peristalsis associated usually with fecal ...
... Certainty of Sensitization.--Rabbits are by no means as easily sensitized to a high degree as guinea pigs. While there is no difficulty in so sensitizing rabbits that the toxic injection causes a drop in blood pressure, increased heart rate, and active cecal peristalsis associated usually with fecal ...
Lethal outcomes in patients with symptomatic heart failure
... Summary. The article analyses clinical characteristics and mortality of patients with symptomatic chronic heart failure following Q-wave myocardial infarction. During the study 224 patients (mean age 64.1±9.7) with symptomatic chronic heart failure and left ventricular ejection fraction <40% were fo ...
... Summary. The article analyses clinical characteristics and mortality of patients with symptomatic chronic heart failure following Q-wave myocardial infarction. During the study 224 patients (mean age 64.1±9.7) with symptomatic chronic heart failure and left ventricular ejection fraction <40% were fo ...
A Comparison of Haemodynamic Effects and Safety between
... effect by increasing sensitivity of Ca2+ in the contraction site. Levosimendan could improve myocardial contractility without increasing intracellular cyclic Adenosine Monophosphate (cAMP) or Ca2+ concentration. But levosimendan does not affect heart rate and increase myocardial oxygen consumption. ...
... effect by increasing sensitivity of Ca2+ in the contraction site. Levosimendan could improve myocardial contractility without increasing intracellular cyclic Adenosine Monophosphate (cAMP) or Ca2+ concentration. But levosimendan does not affect heart rate and increase myocardial oxygen consumption. ...
Thoracic Trauma
... Thorax is a hollow cylinder composed of 12 pairs of ribs,10 articulate posteriorly with the thoracic spine and anteriorly with the sternum via costal cartilages, the lower 2 pairs are floating ribs A nerve,and artery and a vein are located a long the under side of each rib Intercostal muscles connec ...
... Thorax is a hollow cylinder composed of 12 pairs of ribs,10 articulate posteriorly with the thoracic spine and anteriorly with the sternum via costal cartilages, the lower 2 pairs are floating ribs A nerve,and artery and a vein are located a long the under side of each rib Intercostal muscles connec ...
New conduction defects and pacemaker implantation after heart
... block, two (15.4%) had junctional rhythm requiring PPM, and one patient (7.7%) needed an implantable cardioverter defibrillator due to recurrent ventricular arrhythmia. Indications for PPM implantation in the late postoperative period included sinus node dysfunction, complete atrioventricular block, ...
... block, two (15.4%) had junctional rhythm requiring PPM, and one patient (7.7%) needed an implantable cardioverter defibrillator due to recurrent ventricular arrhythmia. Indications for PPM implantation in the late postoperative period included sinus node dysfunction, complete atrioventricular block, ...
A hybrid method for T2-weighted imaging of edema in the heart
... LAD occlusion was performed, to induce myocardial infarction, followed by reperfusion as previously described (5). Imaging was performed 3 days after infarction. Statistics and Measurement of SNR and CNR Noise was estimated from the T2-weighted images using the standard deviation and the mean of a l ...
... LAD occlusion was performed, to induce myocardial infarction, followed by reperfusion as previously described (5). Imaging was performed 3 days after infarction. Statistics and Measurement of SNR and CNR Noise was estimated from the T2-weighted images using the standard deviation and the mean of a l ...
Arrhythmias in ECGs - Auckland Heart Group
... • She had palpitations once before, and was racing to catch a bus • She suddenly had very rapid regular palpitations, and nearly passed out with this –the likely arrhythmia is A) Tachy-brady syndrome with a sinus pause ...
... • She had palpitations once before, and was racing to catch a bus • She suddenly had very rapid regular palpitations, and nearly passed out with this –the likely arrhythmia is A) Tachy-brady syndrome with a sinus pause ...
Aspirin and Cancer
... occurrence of a particular disease (in this case, cancer) is lower in individuals who take a particular drug (in this case, aspirin or other NSAIDs) than in people who don't use the medication. Most observational studies of NSAIDs have linked long-term regular use with protection against colon adeno ...
... occurrence of a particular disease (in this case, cancer) is lower in individuals who take a particular drug (in this case, aspirin or other NSAIDs) than in people who don't use the medication. Most observational studies of NSAIDs have linked long-term regular use with protection against colon adeno ...
Late Ventricular Diastole
... A brief rise in arterial pressure that results from arterial blood rebounding off of newly closed semilunar valves End Diastolic Volume (EDV) The total volume of blood that a ventricle receives during its filling period End Systolic Volume (ESV) The total volume of blood left in a ventricle after ve ...
... A brief rise in arterial pressure that results from arterial blood rebounding off of newly closed semilunar valves End Diastolic Volume (EDV) The total volume of blood that a ventricle receives during its filling period End Systolic Volume (ESV) The total volume of blood left in a ventricle after ve ...
AANA Journal Course 3: Aortic stenosis: A review
... ventricular outflow. To maintain a normal stroke volume, the left ventricle compensates with concentric hypertrophy, a process in which the myocardium thickens without enlargement of the ventricular cavity. The myocardium hypertrophies over many years as the obstruction becomes more severe.4 The thi ...
... ventricular outflow. To maintain a normal stroke volume, the left ventricle compensates with concentric hypertrophy, a process in which the myocardium thickens without enlargement of the ventricular cavity. The myocardium hypertrophies over many years as the obstruction becomes more severe.4 The thi ...
Serum uric acid level.
... CVD was defined as history of angina pectoris, myocardial infarction, angioplasty, coronary artery bypass, heart failure, or stroke. The Davies score assigns 1 point for each of the ...
... CVD was defined as history of angina pectoris, myocardial infarction, angioplasty, coronary artery bypass, heart failure, or stroke. The Davies score assigns 1 point for each of the ...
Physiological changes in pregnancy
... more important later in the pregnancy when the stroke volume plateaus while the heart rate continues to rise.11,24 Although less information is available about the cardiac response to pregnancy of women with heart disease, Ueland et al. showed that pregnant women with underlying cardiac disease have ...
... more important later in the pregnancy when the stroke volume plateaus while the heart rate continues to rise.11,24 Although less information is available about the cardiac response to pregnancy of women with heart disease, Ueland et al. showed that pregnant women with underlying cardiac disease have ...
Fulltext: english,
... ventilation in the mask in healthy volunteers was described by the Cournad’s group in the 1940s. (1) Similar changes have been described in the experiment of Valsalva where an increase in pressure in the airways with a closed glottis caused a decrease in venous return to the heart. (1) Hemodynamic e ...
... ventilation in the mask in healthy volunteers was described by the Cournad’s group in the 1940s. (1) Similar changes have been described in the experiment of Valsalva where an increase in pressure in the airways with a closed glottis caused a decrease in venous return to the heart. (1) Hemodynamic e ...
Low-frequency heart rate variability
... between days or between times of day could be separated using ANOVA. Similarly, because nine measurements were made in each subject, variance within each subject can be estimated accurately. Thus we believe that our data represent the most accurate available estimate of the reproducibility of low-fr ...
... between days or between times of day could be separated using ANOVA. Similarly, because nine measurements were made in each subject, variance within each subject can be estimated accurately. Thus we believe that our data represent the most accurate available estimate of the reproducibility of low-fr ...
Mech41-HemodynamicDisorders
... Just wanted us to get the idea that Thrombin has a central role in many things. Its most important role is the conversion of fibrinogen into fibrin. Thrombosis Has three influences for its formation (known as Virchow’s Triad): 1. Endothelial Injury 2. Abnormal Blood Flow (aka Stasis) 3. Hypercoagula ...
... Just wanted us to get the idea that Thrombin has a central role in many things. Its most important role is the conversion of fibrinogen into fibrin. Thrombosis Has three influences for its formation (known as Virchow’s Triad): 1. Endothelial Injury 2. Abnormal Blood Flow (aka Stasis) 3. Hypercoagula ...
PALS Study Guide
... In general, narrow QRS complexes originate at the junction of the heart or near the AV node. Wide QRS complexes indicate that a rhythm is originating below the bundle of His or in the ventricles. Typically, when looking at an EKG strip, a patient will be hooked up to a monitor or a printout will re ...
... In general, narrow QRS complexes originate at the junction of the heart or near the AV node. Wide QRS complexes indicate that a rhythm is originating below the bundle of His or in the ventricles. Typically, when looking at an EKG strip, a patient will be hooked up to a monitor or a printout will re ...
thoracic trauma
... Thorax is a hollow cylinder composed of 12 pairs of ribs,10articulate posteriorly with the thoracic spine and anteriorly with the sternum via costal cartilages,the lower 2 pairs are floating ribs A nerve,an artery and a vein are located a long the under side of each rib Intercostals muscles connect ...
... Thorax is a hollow cylinder composed of 12 pairs of ribs,10articulate posteriorly with the thoracic spine and anteriorly with the sternum via costal cartilages,the lower 2 pairs are floating ribs A nerve,an artery and a vein are located a long the under side of each rib Intercostals muscles connect ...
Power Point CH 22
... bundle branches 4 Within the interventricular septum, the right and left bundles split from the atrioventricular bundle. ...
... bundle branches 4 Within the interventricular septum, the right and left bundles split from the atrioventricular bundle. ...
Conductive System Of Heart - Rawal College Of Dentistry
... Purkinje fibers is believed to be caused by a very high level of permeability of gap junctions at the intercalated discs between the successive cells of Purkinje fibers. • The rapid conduction through the purkinje fibers ensures that different parts of ventricles are excited almost simultaneously; t ...
... Purkinje fibers is believed to be caused by a very high level of permeability of gap junctions at the intercalated discs between the successive cells of Purkinje fibers. • The rapid conduction through the purkinje fibers ensures that different parts of ventricles are excited almost simultaneously; t ...
Right Ventricular Pacing-Induced Heart Failure after Mitral Valve
... was not considered in this case because it primarily benefits patients with preoperative left ventricle (LV) dysfunction and wide QRS,6 which was not the condition of our patient. The patient’s atrial fibrillation with ventricular response recovered to around 80 bpm with dobutamine support on postop ...
... was not considered in this case because it primarily benefits patients with preoperative left ventricle (LV) dysfunction and wide QRS,6 which was not the condition of our patient. The patient’s atrial fibrillation with ventricular response recovered to around 80 bpm with dobutamine support on postop ...
Left ventricle
... Right ventricle - most of anterior surface Left ventricle – posteroinferior surface Trabeculae carneae – irregular ridges of muscle on walls • Papillary muscles – anchor chordae ...
... Right ventricle - most of anterior surface Left ventricle – posteroinferior surface Trabeculae carneae – irregular ridges of muscle on walls • Papillary muscles – anchor chordae ...
Ventricular Septal Defect
... Obstructive pulmonary arteriolar disease does not occur due to small ventricular defects. Infective endocarditis is the only risk in those patients in whom the defect remains patent. If endocarditis occurs, the site is usually on the right ventricular wall or on the tricuspid valve. Aortic regurgita ...
... Obstructive pulmonary arteriolar disease does not occur due to small ventricular defects. Infective endocarditis is the only risk in those patients in whom the defect remains patent. If endocarditis occurs, the site is usually on the right ventricular wall or on the tricuspid valve. Aortic regurgita ...
Myocardial infarction
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.