Transcatheter Aortic Valve Replacement(TAVR)
... ▪ Some patients with severe aortic stenosis based on valve area have a lower than expected gradient (e.g. mean gradient < 30 mmHg) despite preserved LV ejection fraction (e.g. EF > 50%) ▪ Up to 35% of patients with severe aortic stenosis present with low flow, low gradient ▪ These low gradients ...
... ▪ Some patients with severe aortic stenosis based on valve area have a lower than expected gradient (e.g. mean gradient < 30 mmHg) despite preserved LV ejection fraction (e.g. EF > 50%) ▪ Up to 35% of patients with severe aortic stenosis present with low flow, low gradient ▪ These low gradients ...
Determination of pressure data from velocity data with a view
... C |p prox − pdist |mean However, the mechanical basis for the Gorlin equation rests on Torricelli’s empirical modification of the Bernoulli equation, i.e., the “constant” used is actually variable, and its value is in fact what describes energy dissipation. Moreover, as discussed below, the Bernoull ...
... C |p prox − pdist |mean However, the mechanical basis for the Gorlin equation rests on Torricelli’s empirical modification of the Bernoulli equation, i.e., the “constant” used is actually variable, and its value is in fact what describes energy dissipation. Moreover, as discussed below, the Bernoull ...
Reservoir and Conduit Function of the Right Atrium - AJP
... The right atrium is a dynamic structure whose role is to assist filling of the right ventricle. Ideally, the right atrium should transfer a high volume of blood rapidly to the ventricle at low pressure to prevent peripheral edema and hepatic congestion. The three components of atrial function are: 1 ...
... The right atrium is a dynamic structure whose role is to assist filling of the right ventricle. Ideally, the right atrium should transfer a high volume of blood rapidly to the ventricle at low pressure to prevent peripheral edema and hepatic congestion. The three components of atrial function are: 1 ...
File - Dr. Jerry Cronin
... – Blood flows from high to low pressure • Controlled by timing of contractions • Directed by one-way valves ...
... – Blood flows from high to low pressure • Controlled by timing of contractions • Directed by one-way valves ...
Cardiomyopathy - Society for Pediatric Anesthesia
... >150 g m-2 (normal 60 g m-2 ) predisposed to: • Perioperative arrhythmias • Myocardial ischemia with tachycardia and low diastolic arterial pressure Ing RJ, et al. Ped Anesth 2004; 14:514-19. ...
... >150 g m-2 (normal 60 g m-2 ) predisposed to: • Perioperative arrhythmias • Myocardial ischemia with tachycardia and low diastolic arterial pressure Ing RJ, et al. Ped Anesth 2004; 14:514-19. ...
Case report the u wave and papillary muscle variants: revisiting an AFRICA
... be a clue to underlying papillary muscle variants. Secondly, as is clearly visible in Fig. 1, the U waves in leads II, III and aVF are seen in the beat following a beat with a longer R–R interval. It is proposed and hypothesised that this might be due to the following mechanism: the beat preceding t ...
... be a clue to underlying papillary muscle variants. Secondly, as is clearly visible in Fig. 1, the U waves in leads II, III and aVF are seen in the beat following a beat with a longer R–R interval. It is proposed and hypothesised that this might be due to the following mechanism: the beat preceding t ...
The Weight of the Heart and Its Chambers in with and
... Values in Hypertensive Cardiovascular Disease A complete analysis of the sequence and degrees of hypertrophy in the different cardiac chambers has not been possible for two major reasons: (a) the onset of hypertension is rarely known, hence, the effect of duration of hypertension upon degree of left ...
... Values in Hypertensive Cardiovascular Disease A complete analysis of the sequence and degrees of hypertrophy in the different cardiac chambers has not been possible for two major reasons: (a) the onset of hypertension is rarely known, hence, the effect of duration of hypertension upon degree of left ...
Figure 1 - Grupo Akros
... Cardiac resynchronization therapy is a significant therapeutic modality in symptomatic patients with heart failure refractory to drugs with CLBBB pattern and wide QRS (≥120 ms) in the electrocardiogram. However, regrettably wide QRS (considered as a marker of electrical dyssynchrony) is present in ...
... Cardiac resynchronization therapy is a significant therapeutic modality in symptomatic patients with heart failure refractory to drugs with CLBBB pattern and wide QRS (≥120 ms) in the electrocardiogram. However, regrettably wide QRS (considered as a marker of electrical dyssynchrony) is present in ...
Sample pages 1 PDF
... functional approach to blood flow is very well adapted to visualization of cardiac as well as mediastinal structures, in contrast with echocardiography, which is limited by bone or air artifacts [1–15]. However, as for any “tomographic” technique, multiplanar MRI requires mental 3D reconstruction of ...
... functional approach to blood flow is very well adapted to visualization of cardiac as well as mediastinal structures, in contrast with echocardiography, which is limited by bone or air artifacts [1–15]. However, as for any “tomographic” technique, multiplanar MRI requires mental 3D reconstruction of ...
Cardiomyopathies - Society of Cardiovascular Anesthesiologists
... disorders due to the presence of either pulmonary venous or vena caval congestion, which results in signs of left and right heart failure, respectively. However, since this term is vague and could include all cardiomyopathies, the diseases in this section will be referred to as “restrictive/infiltra ...
... disorders due to the presence of either pulmonary venous or vena caval congestion, which results in signs of left and right heart failure, respectively. However, since this term is vague and could include all cardiomyopathies, the diseases in this section will be referred to as “restrictive/infiltra ...
Nerve activates contraction
... Extrasystole: premature contraction – a section of heart may become hyperexcitable due to caffeine, nicotine, etc and start generating a quicker impulse ...
... Extrasystole: premature contraction – a section of heart may become hyperexcitable due to caffeine, nicotine, etc and start generating a quicker impulse ...
Vital Sign Measurements
... in the arterial systolic pressure and an accompanying inspiratory fall in venous pressure. A paradoxical pulse exists when inspiration creates more than a 10 mm Hg drop in systolic arterial pressure. The exaggerated waxing and waning in the pulse volume may be detected by palpation; more often, it ...
... in the arterial systolic pressure and an accompanying inspiratory fall in venous pressure. A paradoxical pulse exists when inspiration creates more than a 10 mm Hg drop in systolic arterial pressure. The exaggerated waxing and waning in the pulse volume may be detected by palpation; more often, it ...
Chapter 12: The Circulatory System
... Ans: Stroke volume equals the volume of blood pumped out of a ventricle during one contraction. Cardiac output equals the volume of blood pumped by one ventricle in one minute. 52. List the three waves of an ECG and explain what physiological activity each wave represents. Ans: P wave—Accompanies at ...
... Ans: Stroke volume equals the volume of blood pumped out of a ventricle during one contraction. Cardiac output equals the volume of blood pumped by one ventricle in one minute. 52. List the three waves of an ECG and explain what physiological activity each wave represents. Ans: P wave—Accompanies at ...
Artery in Man: Evaluation of Ventricular Volume Measurements from
... While the available information indicates that mixing does not appear to be homogeneous (1215), the significance of this observation with respect to estimations of ventricular volume has not been characterized adequately. Volume may still be estimated with validity in the absence of perfect mixing i ...
... While the available information indicates that mixing does not appear to be homogeneous (1215), the significance of this observation with respect to estimations of ventricular volume has not been characterized adequately. Volume may still be estimated with validity in the absence of perfect mixing i ...
C h a p t e r 2 5 Non Surgical Treatment of Congenital Heart Disease
... aortic stenosis.18 Trans-carotid approach for neonates and trans-septal antegrade approach have also been described for balloon aortic valvuloplasty. In our own experience, sick neonates with LV dysfunction are at highest risk for procedure related complications.19 c. ...
... aortic stenosis.18 Trans-carotid approach for neonates and trans-septal antegrade approach have also been described for balloon aortic valvuloplasty. In our own experience, sick neonates with LV dysfunction are at highest risk for procedure related complications.19 c. ...
Chapter 12: The Circulatory System
... Ans: Stroke volume equals the volume of blood pumped out of a ventricle during one contraction. Cardiac output equals the volume of blood pumped by one ventricle in one minute. 52. List the three waves of an ECG and explain what physiological activity each wave represents. Ans: P wave—Accompanies at ...
... Ans: Stroke volume equals the volume of blood pumped out of a ventricle during one contraction. Cardiac output equals the volume of blood pumped by one ventricle in one minute. 52. List the three waves of an ECG and explain what physiological activity each wave represents. Ans: P wave—Accompanies at ...
calibration of an electronic phonocardiograph
... From the Departments of Physiology and of Natural Philosophy, University of Glasgow Received August 28, 1954 ...
... From the Departments of Physiology and of Natural Philosophy, University of Glasgow Received August 28, 1954 ...
NURS1004 Week 10 Lecture the Heart Part II Prepared by Didy
... – Blood flows from high to low pressure • Controlled by timing of contractions • Directed by one-way valves ...
... – Blood flows from high to low pressure • Controlled by timing of contractions • Directed by one-way valves ...
Echocardiographic Evaluation of Aortic Valve Stenosis
... recorded will have a “clean” interior without many sounds, with clear and thin boundaries. The use of velocity values in the continuity equation instead of their integrals (VTI) is appropriate only when the LVOT and peak velocity signals are of the same form and is best avoided. In addition, correct ...
... recorded will have a “clean” interior without many sounds, with clear and thin boundaries. The use of velocity values in the continuity equation instead of their integrals (VTI) is appropriate only when the LVOT and peak velocity signals are of the same form and is best avoided. In addition, correct ...
MR Imaging of Congenital Heart Disease
... and end organ damage, even in patients who have undergone surgical repair. Treatment in infancy with surgical excision of the narrowing is usually performed, though in older subjects balloon angioplasty may be undertaken, and following re-coarctation, aortic stenting can be used. In the neonatal pop ...
... and end organ damage, even in patients who have undergone surgical repair. Treatment in infancy with surgical excision of the narrowing is usually performed, though in older subjects balloon angioplasty may be undertaken, and following re-coarctation, aortic stenting can be used. In the neonatal pop ...
PV Catheter Positioning Guide How to Ensure Proper Catheter Placement Pressure-Volume
... use care when inserting the Catheter past the aortic valve as excessive force can cause Catheters damage, especially in small, rodent Catheters. Variable Segment Length (VSL) Catheters have four segment length settings. Select the longest segment length that gives physiological shaped pressure vs ma ...
... use care when inserting the Catheter past the aortic valve as excessive force can cause Catheters damage, especially in small, rodent Catheters. Variable Segment Length (VSL) Catheters have four segment length settings. Select the longest segment length that gives physiological shaped pressure vs ma ...
Aortic Valve Replacement in Octogenarians: Is Biologic Valve the
... evaluated the surgical results in elderly patients, although the term elderly is often used to describe different populations. For example, Tseng and colleagues [4] defined as elderly a population older than 70 years, whereas Florath and colleagues [5] defined elderly as being older than 65 years. H ...
... evaluated the surgical results in elderly patients, although the term elderly is often used to describe different populations. For example, Tseng and colleagues [4] defined as elderly a population older than 70 years, whereas Florath and colleagues [5] defined elderly as being older than 65 years. H ...
Help With Coming Off CPB - Society of Cardiovascular
... surgery and usually resolves around 24 hours postoperatively [3]. The return to baseline function may be delayed in patients with preoperative ventricular dysfunction [3]. The underlying pathophysiology in myocardial stunning may be related to impaired calcium handling by the sarcoplasmic reticulum ...
... surgery and usually resolves around 24 hours postoperatively [3]. The return to baseline function may be delayed in patients with preoperative ventricular dysfunction [3]. The underlying pathophysiology in myocardial stunning may be related to impaired calcium handling by the sarcoplasmic reticulum ...
Heart Disease and the Pregnant Patient Vanita Jain, MD FACOG
... – Flow across valve is fixed, progressive increase in preload results in increase LA – LV pressure gradient; leads to increased LA pressure, can result in pulmonary edema or pulmonary hypertension – Baseline echocardiogram to determine severity of lesion, presence of LAE – Baseline EKG to rule out a ...
... – Flow across valve is fixed, progressive increase in preload results in increase LA – LV pressure gradient; leads to increased LA pressure, can result in pulmonary edema or pulmonary hypertension – Baseline echocardiogram to determine severity of lesion, presence of LAE – Baseline EKG to rule out a ...
Mitral insufficiency
Mitral insufficiency (MI), mitral regurgitation or mitral incompetence is a disorder of the heart in which the mitral valve does not close properly when the heart pumps out blood. It is the abnormal leaking of blood backwards from the left ventricle, through the mitral valve, into the left atrium, when the left ventricle contracts, i.e. there is regurgitation of blood back into the left atrium. MI is the most common form of valvular heart disease.