Left Ventricular Volume
... Although it was not possible to determine the sensitivity of this technique in any quantitative manner, it is interesting to compare the changes in dimension found in this study with the changes in wall dimension determined by previous studies using cineradiography of ventricular epicardial tantalum ...
... Although it was not possible to determine the sensitivity of this technique in any quantitative manner, it is interesting to compare the changes in dimension found in this study with the changes in wall dimension determined by previous studies using cineradiography of ventricular epicardial tantalum ...
Why is Regression of Left Ventricular Hypertrophy Convenient? QCVC Committees
... In some studies carried out by our group, we have been able to identify, in an objective way a linear, positive, continuous and statistically significant correlation between the left ventricular mass index corrected by body surface or by height to the 2.7 power and the maximum corrected QT so that t ...
... In some studies carried out by our group, we have been able to identify, in an objective way a linear, positive, continuous and statistically significant correlation between the left ventricular mass index corrected by body surface or by height to the 2.7 power and the maximum corrected QT so that t ...
Effect of Combined Sympathetic and Vagal Stimulation on Heart
... should serve two useful purposes. First, it represents a quantitative relationship between the input and output of a very important component of the cardiovascular control system. Such information is essential in the building of more comprehensive models of cardiovascular control. Secondly, this mod ...
... should serve two useful purposes. First, it represents a quantitative relationship between the input and output of a very important component of the cardiovascular control system. Such information is essential in the building of more comprehensive models of cardiovascular control. Secondly, this mod ...
Non-invasive Measurement of Cardiac Output and
... the first steady-state exercise level, even when pedalling rates below 60 rev./min were employed. It may be that reducing the pedalling rate below 60 rev./ min had little impact on the workload, as the bicycle is designed to produce a constant resistivity for all rates above 40 rev./min. For two pat ...
... the first steady-state exercise level, even when pedalling rates below 60 rev./min were employed. It may be that reducing the pedalling rate below 60 rev./ min had little impact on the workload, as the bicycle is designed to produce a constant resistivity for all rates above 40 rev./min. For two pat ...
The Cardiovascular System
... contract, taking another 0.30 second. The rapid pressure increase inside the ventricles forces the atrioventricular valves closed, and the semilunar valves open. The blood trapped in the ventricles cannot escape back to the atria through the atrioventricular valves, and so it is forced through the s ...
... contract, taking another 0.30 second. The rapid pressure increase inside the ventricles forces the atrioventricular valves closed, and the semilunar valves open. The blood trapped in the ventricles cannot escape back to the atria through the atrioventricular valves, and so it is forced through the s ...
Breakdown of blood pressure and body fluid homeostasis in
... were an equilibration to the controlled diet that consisted of suflkien: calories to maintain their current weight and provided 87 mEQ/24 h of sodium and 80 mE+/24 h of potassium. This diet was served as three meals taken at 8 AM, 12 PM and 5 PM. Water was restricted to 1,000 ml on day 3 but was pro ...
... were an equilibration to the controlled diet that consisted of suflkien: calories to maintain their current weight and provided 87 mEQ/24 h of sodium and 80 mE+/24 h of potassium. This diet was served as three meals taken at 8 AM, 12 PM and 5 PM. Water was restricted to 1,000 ml on day 3 but was pro ...
Impact of the Patient Torso Model on the Solution of the Inverse
... For each ischemic lesion the difference QRST integral map (DIM) ∆i was calculated by subtracting the IM computed for the normal activation from the IM where k is the number of electrodes on the torso surface. The EID in a position that produced the map computed in the presence of the particular lesi ...
... For each ischemic lesion the difference QRST integral map (DIM) ∆i was calculated by subtracting the IM computed for the normal activation from the IM where k is the number of electrodes on the torso surface. The EID in a position that produced the map computed in the presence of the particular lesi ...
Epub ahead of print - Journal of Clinical and Translational
... recellularization. Far from an inert scaffold, the role of ECM has been increasingly recognized in cell signaling, differentiation and tissue homeostasis (Choi et al. 2017). Additionally, it is through membrane receptors known as integrins and mechanosensitive ion channels in the ECM by which cells ...
... recellularization. Far from an inert scaffold, the role of ECM has been increasingly recognized in cell signaling, differentiation and tissue homeostasis (Choi et al. 2017). Additionally, it is through membrane receptors known as integrins and mechanosensitive ion channels in the ECM by which cells ...
Cardiac Output Venous Return
... Doc: “Yes --patients receiving medicines for hypertension --quite common --especially alpha-1-adrenergic blockers.” Kay: “I did an internship on a psychiatric ward. Many of the antipsychotic medicines do this also.” Doc: “Not uncommon side effect of medicines. But we did ask his daughter if he had di ...
... Doc: “Yes --patients receiving medicines for hypertension --quite common --especially alpha-1-adrenergic blockers.” Kay: “I did an internship on a psychiatric ward. Many of the antipsychotic medicines do this also.” Doc: “Not uncommon side effect of medicines. But we did ask his daughter if he had di ...
Print - Circulation
... pressure, and the mitral valve begins to close. Closure of the mitral valve is completed with the onset of ventricular systole and a rapid rise in ventricular pressure. In patients who have a high left ventricular initial diastolic pressure, usually due to an increased endsystolic volume and congest ...
... pressure, and the mitral valve begins to close. Closure of the mitral valve is completed with the onset of ventricular systole and a rapid rise in ventricular pressure. In patients who have a high left ventricular initial diastolic pressure, usually due to an increased endsystolic volume and congest ...
document
... channels close, while the K+ channels are still open. This ensures a net outward current, corresponding to negative change in membrane potential, This net outward, positive current (equal to loss of positive charge from the cell) causes the cell to repolarize. ...
... channels close, while the K+ channels are still open. This ensures a net outward current, corresponding to negative change in membrane potential, This net outward, positive current (equal to loss of positive charge from the cell) causes the cell to repolarize. ...
Rapid Communications - Circulation Research
... Abstract—The Jervell and Lange-Nielsen (JLN) syndrome affects the human cardioauditory system, associating a profound bilateral deafness with an abnormally long QT interval on the ECG. It results from mutations in KVLQT1 and ISK genes that encode the 2 subunits forming the K1 channel responsible for ...
... Abstract—The Jervell and Lange-Nielsen (JLN) syndrome affects the human cardioauditory system, associating a profound bilateral deafness with an abnormally long QT interval on the ECG. It results from mutations in KVLQT1 and ISK genes that encode the 2 subunits forming the K1 channel responsible for ...
Left hemitruncus: a rare congenital heart condition
... week after the surgery. At the follow-up visit 4 weeks later, the echocardiogram showed only grade 2 tricuspid regurgitation, with an estimated pulmonary artery pressure of 55 mmHg and no evidence of stenosis at the left pulmonary artery. ...
... week after the surgery. At the follow-up visit 4 weeks later, the echocardiogram showed only grade 2 tricuspid regurgitation, with an estimated pulmonary artery pressure of 55 mmHg and no evidence of stenosis at the left pulmonary artery. ...
Iterative Reconstruction to Preserve Image Quality and Diagnostic
... CCA was performed according to standard Judkins technique, using 5-F or 6-F diagnostic catheters. At least 5 projections of the left and 2 projections of the right coronary artery were acquired. Two experienced cardiologists (with 23 and 16 years of experience in CCA interpretation, respectively), w ...
... CCA was performed according to standard Judkins technique, using 5-F or 6-F diagnostic catheters. At least 5 projections of the left and 2 projections of the right coronary artery were acquired. Two experienced cardiologists (with 23 and 16 years of experience in CCA interpretation, respectively), w ...
030501 Nitroprusside in Critically Ill Patients with Left Ventricular
... these patients, who are in unstable condition and who often have multiple coexisting diseases.6 Balloon valvuloplasty has been recommended in this situation as a bridge to surgery or as palliative therapy in those deemed not to be candidates for surgery.7 However, it is associated with a high rate o ...
... these patients, who are in unstable condition and who often have multiple coexisting diseases.6 Balloon valvuloplasty has been recommended in this situation as a bridge to surgery or as palliative therapy in those deemed not to be candidates for surgery.7 However, it is associated with a high rate o ...
Heart rate during thermoregulation in P. barbata
... thereby creating a nervous tone which increases the efficacy of the heart rate response (Altimiras et al., 1997; Hoffman and Romero, 2000). There is evidence that changes in the cholinergic tone on the heart are the principle mechanism controlling heart rate during exercise in fish (Axelsson et al., ...
... thereby creating a nervous tone which increases the efficacy of the heart rate response (Altimiras et al., 1997; Hoffman and Romero, 2000). There is evidence that changes in the cholinergic tone on the heart are the principle mechanism controlling heart rate during exercise in fish (Axelsson et al., ...
Chapter - Advanced Emergency Medical Technician
... – Causes lung to partially or totally collapse – Common causes • Fractured rib that penetrates underlying lung ...
... – Causes lung to partially or totally collapse – Common causes • Fractured rib that penetrates underlying lung ...
Analysis of LeftVentricular Pressure During Isovolumic
... the results of coronary arteriography and effects of pacing. Group 1 included nine patients with normal coronary arteries who did not have pain or produce lactate on pacing. Group' 2 included nine patients with coronary artery disease in whom pacing did not provoke angina' or lactate production. Gro ...
... the results of coronary arteriography and effects of pacing. Group 1 included nine patients with normal coronary arteries who did not have pain or produce lactate on pacing. Group' 2 included nine patients with coronary artery disease in whom pacing did not provoke angina' or lactate production. Gro ...
Changes in ventricular volume, wall thickness and wall stress during
... To assess right ventricular volumes, gated equilibrium radionuclide ventriculography was performed with the patient supine on the day of left heart catheterization. AU subjects received 10 mg of intravenous sodium pyrophosphate and 1.8mg of stannous chloride, followed 30 min later by 20 mCi of techn ...
... To assess right ventricular volumes, gated equilibrium radionuclide ventriculography was performed with the patient supine on the day of left heart catheterization. AU subjects received 10 mg of intravenous sodium pyrophosphate and 1.8mg of stannous chloride, followed 30 min later by 20 mCi of techn ...
Slide 1
... • Persistent AF – fails to self-terminate; duration greater than 7 days; can be terminated by cardioversion • Permanent AF – duration more than 1 year; cardioversion either failed or has not been attempted • “Lone” AF – paroxysmal, persistent, or permanent AF without structural heart disease ...
... • Persistent AF – fails to self-terminate; duration greater than 7 days; can be terminated by cardioversion • Permanent AF – duration more than 1 year; cardioversion either failed or has not been attempted • “Lone” AF – paroxysmal, persistent, or permanent AF without structural heart disease ...
Interrelationships of Hepatic Blood Flow
... investigated in 17 patients undergoing cardiac catheterization. Lidocaine was administered by a 50 mg bolus, followed by a constant infusion of 40 ug/kg/min until steady state conditions were achieved. Cardiac output and estimated hepatic blood flow were also determined. An inverse relationship betw ...
... investigated in 17 patients undergoing cardiac catheterization. Lidocaine was administered by a 50 mg bolus, followed by a constant infusion of 40 ug/kg/min until steady state conditions were achieved. Cardiac output and estimated hepatic blood flow were also determined. An inverse relationship betw ...
DOI: 10.1161/CIRCULATIONAHA.108.808907 published online Oct
... compromise outcomes after heart transplantation. Safeguarding of structure and function of cardiomyocytes and endothelium in donor hearts may lead to improved patient survival after transplantation. Information gained from porcine hearts stored in standard transplant solution was used to design a su ...
... compromise outcomes after heart transplantation. Safeguarding of structure and function of cardiomyocytes and endothelium in donor hearts may lead to improved patient survival after transplantation. Information gained from porcine hearts stored in standard transplant solution was used to design a su ...
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.