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... tension automatically as the vessel expands, and without biochemical energy expenditure. The collagen fibers are much stiffer than the elastin fibers. However, these fibers are slack, and do not exert their tension until the vessel has been stretched. Thus, the more the vessel expands, the stiffer i ...
... tension automatically as the vessel expands, and without biochemical energy expenditure. The collagen fibers are much stiffer than the elastin fibers. However, these fibers are slack, and do not exert their tension until the vessel has been stretched. Thus, the more the vessel expands, the stiffer i ...
Electrocardiography_II_Student
... delayed depolarization. In this case, repolarization does not occur at the same place as it normally does. Instead repolarization occurs at the apex of the heart, delayed depolarization causes the base of the ventricles to repolarize before the apex, causing the vector to point from the apex to the ...
... delayed depolarization. In this case, repolarization does not occur at the same place as it normally does. Instead repolarization occurs at the apex of the heart, delayed depolarization causes the base of the ventricles to repolarize before the apex, causing the vector to point from the apex to the ...
1443-ConsultationProtocol-Accessible
... 2007; Li et al. 2015). The term used to describe these ischaemic strokes of unknown or obscure mechanism is cryptogenic stroke (CS) (Andrade, Field & Khairy, 2015). More specifically, CS is defined as cerebral infarction that, despite extensive evaluation, is not attributable to a definite source of ...
... 2007; Li et al. 2015). The term used to describe these ischaemic strokes of unknown or obscure mechanism is cryptogenic stroke (CS) (Andrade, Field & Khairy, 2015). More specifically, CS is defined as cerebral infarction that, despite extensive evaluation, is not attributable to a definite source of ...
A comparative study of contractility of the heart ventricle in some
... was modified to improve unsatisfactory tracings, if any. The sampling rate and sensitivity of the apexcardiographic channel of the polygraph were 1000 Hz and 0.3 to 1.5 86 mV/mm, respectively. Data analysis, calculations and statistics The ventricle index was calculated as ventricle weight / body we ...
... was modified to improve unsatisfactory tracings, if any. The sampling rate and sensitivity of the apexcardiographic channel of the polygraph were 1000 Hz and 0.3 to 1.5 86 mV/mm, respectively. Data analysis, calculations and statistics The ventricle index was calculated as ventricle weight / body we ...
What is the cause of the regular wide QRS
... (1) Answers will be published in the SMJ August 2011 issue. (2) The MCR numbers of successful candidates will be posted online at www.sma.org.sg/cme/ smj by 04 August 2011. (3) All online submissions will receive an automatic email acknowledgment. (4) Passing mark is 60%. No mark will be deducted fo ...
... (1) Answers will be published in the SMJ August 2011 issue. (2) The MCR numbers of successful candidates will be posted online at www.sma.org.sg/cme/ smj by 04 August 2011. (3) All online submissions will receive an automatic email acknowledgment. (4) Passing mark is 60%. No mark will be deducted fo ...
pericardial effusions by echocardiography - Heart
... to the aortic root and left atrium (Fig. 2A). Only a narrow echo-free space, wider in systole than in diastole, is visualised between the ventricular posterior wall and parietal pericardium at mid left ventricular level. This echo-free space widens considerably (to about 1-5 cm) behind the basal lef ...
... to the aortic root and left atrium (Fig. 2A). Only a narrow echo-free space, wider in systole than in diastole, is visualised between the ventricular posterior wall and parietal pericardium at mid left ventricular level. This echo-free space widens considerably (to about 1-5 cm) behind the basal lef ...
Assessments
... Competency framework 2007 – NICE published - Acutely Ill patients in hospital – recognition of and response to acute illness in adults in hospital. The key priorities of this document are: • Physiological observations at the time of their admission • A written monitoring plan (diagnosis, co-morbidi ...
... Competency framework 2007 – NICE published - Acutely Ill patients in hospital – recognition of and response to acute illness in adults in hospital. The key priorities of this document are: • Physiological observations at the time of their admission • A written monitoring plan (diagnosis, co-morbidi ...
The effect of baroreceptor activity on cardiovascular regulation
... pressure in the sinus14. If we prevent the deformation of the carotid sinuses by placing a splint, then the changes of the intraluminal pressure on their own do not cause reflex provocation15. From the above, we understand why baroreceptor reflexes are influenced by changes in the distensibility or ...
... pressure in the sinus14. If we prevent the deformation of the carotid sinuses by placing a splint, then the changes of the intraluminal pressure on their own do not cause reflex provocation15. From the above, we understand why baroreceptor reflexes are influenced by changes in the distensibility or ...
Omega-3 Fatty Acids, Acute Coronary Syndrome, and Sudden Death
... Although there is reasonable consensus that omega-3 FAs lower the risk of fatal end points, the association between these FAs and the risk of nonfatal cardiac events (ie, MI, unstable angina) remains less clear. Such a benefit was observed in JELIS [12••] but not in DART [7] or GISSI [10]. However, ...
... Although there is reasonable consensus that omega-3 FAs lower the risk of fatal end points, the association between these FAs and the risk of nonfatal cardiac events (ie, MI, unstable angina) remains less clear. Such a benefit was observed in JELIS [12••] but not in DART [7] or GISSI [10]. However, ...
Modelling and robust estimation of AV node function during AF
... passing through the pulmonary capillaries, the oxygenated pulmonary venous blood returns to the left atrium through the pulmonary veins. The flow of blood then passes through the mitral valve into the left ventricle and is pumped through the aortic valve into the aorta. After that it begins the syst ...
... passing through the pulmonary capillaries, the oxygenated pulmonary venous blood returns to the left atrium through the pulmonary veins. The flow of blood then passes through the mitral valve into the left ventricle and is pumped through the aortic valve into the aorta. After that it begins the syst ...
Evaluation of Native Left Ventricular Function During Mechanical
... without LVAD support. Method 4 is a theoretically acceptable procedure, and method 5 uses a special mode to apply a given load to the recovering myocardium. Unfortunately, none of these methods can predict the ability of the native left ventricle to sustain systemic circulation just after weaning fr ...
... without LVAD support. Method 4 is a theoretically acceptable procedure, and method 5 uses a special mode to apply a given load to the recovering myocardium. Unfortunately, none of these methods can predict the ability of the native left ventricle to sustain systemic circulation just after weaning fr ...
Extracorporeal membrane oxygenation support after pediatric
... Although left ventricular failure is a common cause for ECMO support in adult patients, right ventricular failure, respiratory failure and pulmonary hypertension often contribute substantially, when mechanical circulatory support is required in pediatric cases. Many published reports of ECMO outcome ...
... Although left ventricular failure is a common cause for ECMO support in adult patients, right ventricular failure, respiratory failure and pulmonary hypertension often contribute substantially, when mechanical circulatory support is required in pediatric cases. Many published reports of ECMO outcome ...
Lesson 33
... A. a chemical that helps transmit brain messages along certain nerves B. chemicals produced in the brain that create a feeling of well-being C. the narrowing of one of the coronary arteries by a blood clot D. the development of additional arteries that deliver oxygenated blood to the heart muscle E. ...
... A. a chemical that helps transmit brain messages along certain nerves B. chemicals produced in the brain that create a feeling of well-being C. the narrowing of one of the coronary arteries by a blood clot D. the development of additional arteries that deliver oxygenated blood to the heart muscle E. ...
Assessment of left ventricular diastolic function with cardiovascular
... 2) Rapid filling: Pressure continues to decline due to LV relaxation and elastic recoil until it is below the left atrial (LA) pressure so the MV will open, and rapid filling begins. It ends when LV pressure equals LA pressure and is responsible for nearly 70% of LV filling. 3) Diastasis: It is the ...
... 2) Rapid filling: Pressure continues to decline due to LV relaxation and elastic recoil until it is below the left atrial (LA) pressure so the MV will open, and rapid filling begins. It ends when LV pressure equals LA pressure and is responsible for nearly 70% of LV filling. 3) Diastasis: It is the ...
Regulation of Cardiac Output by Stroke Volume and Heart Rate in
... 25% greater than that obtained prior to operation. Baseline heart rate prior to operation was 60 ± 3 beats/min. After control recordings, 1.2 ± 0.2 liters of normal saline, warmed to 37°C, were infused over 5-10 minutes to raise left atrial pressure by 15 mm Hg. Data were averaged over 10 to 15-seco ...
... 25% greater than that obtained prior to operation. Baseline heart rate prior to operation was 60 ± 3 beats/min. After control recordings, 1.2 ± 0.2 liters of normal saline, warmed to 37°C, were infused over 5-10 minutes to raise left atrial pressure by 15 mm Hg. Data were averaged over 10 to 15-seco ...
CV - Division of Cardiology
... medical students as part of shadowing experience to expose trainees to the daily routine of an attending physician over the course of the year. MENTORING: (includes clinical research projects and scholarly activity) ** The overwhelming majority of abstracts and articles have been collaborative effor ...
... medical students as part of shadowing experience to expose trainees to the daily routine of an attending physician over the course of the year. MENTORING: (includes clinical research projects and scholarly activity) ** The overwhelming majority of abstracts and articles have been collaborative effor ...
Heart Valve Mathematical Models - RIT Scholar Works
... orifice area of the valve is reduced. Clinical conditions that cause stenosis are stiffening of the leaflet due to calcification or fusion of commissures. If the valve fails to close (i.e., incompetence of the leaflet contact to seal), blood flow regurgitates back through the valve, making the heart ...
... orifice area of the valve is reduced. Clinical conditions that cause stenosis are stiffening of the leaflet due to calcification or fusion of commissures. If the valve fails to close (i.e., incompetence of the leaflet contact to seal), blood flow regurgitates back through the valve, making the heart ...
Clinical Practice Guidelines on UA/NSTEMI 2002
... With the first 4 causes, the imbalance is caused primarily by a reduction in oxygen supply to the myocardium, whereas with the fifth cause, the imbalance is due principally to increased myocardial oxygen requirement, usually in the presence of a fixed restricted oxygen supply. 3.1 The most common c ...
... With the first 4 causes, the imbalance is caused primarily by a reduction in oxygen supply to the myocardium, whereas with the fifth cause, the imbalance is due principally to increased myocardial oxygen requirement, usually in the presence of a fixed restricted oxygen supply. 3.1 The most common c ...
Reduce Infarct Size
... Jennings et al 1960; Arch Pathol;70:68-78 Yellon DM and Hausenloy DJ 2007; N Engl J Med;357:1121-35 ...
... Jennings et al 1960; Arch Pathol;70:68-78 Yellon DM and Hausenloy DJ 2007; N Engl J Med;357:1121-35 ...
Robust Atlas-Based Segmentation of Highly Variable Anatomy: Left
... We validate our method on a set of 16 electro-cardiogram gated GadoliniumDTPA (0.2 mmol/kg) contrast-enhanced MRA images (CIDA sequence, TR= 4.3ms, TE=2.0ms, T=40°, in-plane resolution varying from 0.51mm to 0.68mm, slice thickness varying from 1.2mm to 1.7mm, ±80 kHz bandwidth, atrial diastolic ECG ...
... We validate our method on a set of 16 electro-cardiogram gated GadoliniumDTPA (0.2 mmol/kg) contrast-enhanced MRA images (CIDA sequence, TR= 4.3ms, TE=2.0ms, T=40°, in-plane resolution varying from 0.51mm to 0.68mm, slice thickness varying from 1.2mm to 1.7mm, ±80 kHz bandwidth, atrial diastolic ECG ...
2014 ACC/AHA Guideline on Perioperative Cardiovascular
... a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines. J Am Coll Cardiol 2014;64:2373–405. This article has been copublished in Circulation and the Journal of Nuclear Cardiology. Copies: This document is available on the World Wide Web sites of t ...
... a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines. J Am Coll Cardiol 2014;64:2373–405. This article has been copublished in Circulation and the Journal of Nuclear Cardiology. Copies: This document is available on the World Wide Web sites of t ...
Effects of physical exercises on the ventricular myocardium
... adult myocardium consists of around 80% of myocytes and 20% of cellular matrix, which contains conjunctive tissue and blood vessels, among others. These proportions are different in distinct development stages and present an increased relative myocyte volume in the first years of life. In other case ...
... adult myocardium consists of around 80% of myocytes and 20% of cellular matrix, which contains conjunctive tissue and blood vessels, among others. These proportions are different in distinct development stages and present an increased relative myocyte volume in the first years of life. In other case ...
2. carditis
... rhythm (often without arrhythmias and conduction disturbances), left ventricular hypertrophy with signs of ischemia it subendocardial departments (down below the contour of ST-negative T ...
... rhythm (often without arrhythmias and conduction disturbances), left ventricular hypertrophy with signs of ischemia it subendocardial departments (down below the contour of ST-negative T ...
Arrhythmic Sudden Cardiac Death: Substrate, Mechanisms and
... Abnormal electric activity due to depolarization delay may develop in areas of fibrosis and scars around the infarcted myocardial zones. Such areas favour the development of re-entrant circuits and the initiation of monomorphic ventricular tachycardia. Lowamplitude, high-frequency currents located i ...
... Abnormal electric activity due to depolarization delay may develop in areas of fibrosis and scars around the infarcted myocardial zones. Such areas favour the development of re-entrant circuits and the initiation of monomorphic ventricular tachycardia. Lowamplitude, high-frequency currents located i ...
ABERRANT VENTRICULAR CONDUCTION TYPES AND
... system, the phenomenon the authors observed originated within ischemic myocardium. In vitro studies indicate that the underlying mechanism may be related to postrepolarization refractoriness induced by ischemia7. Transitory BBB at the onset of an SVT is noted in 14% of the population, is more freque ...
... system, the phenomenon the authors observed originated within ischemic myocardium. In vitro studies indicate that the underlying mechanism may be related to postrepolarization refractoriness induced by ischemia7. Transitory BBB at the onset of an SVT is noted in 14% of the population, is more freque ...