Acute Electrophysiologic Effects of Inhaled Salbutamol in Humans*
... Measurements and results: Sinus cycle length, sinus node recovery time (SNRT), interval from the earliest reproducible rapid deflection of the atrial electrogram in the His bundle recording to the onset of the His deflection (AH), interval from the His deflection to the onset of ventricular depolari ...
... Measurements and results: Sinus cycle length, sinus node recovery time (SNRT), interval from the earliest reproducible rapid deflection of the atrial electrogram in the His bundle recording to the onset of the His deflection (AH), interval from the His deflection to the onset of ventricular depolari ...
Validation of fourier amplitude ratio to quantitate valvular
... the interobserver variability with this technique is low (9). This technique is based on the premise that first harmonic Fourier analysis of a gated blood pool study generates an amplitude value for each pixel which is a function of the stroke counts of that pixel. By summing all the amplitude value ...
... the interobserver variability with this technique is low (9). This technique is based on the premise that first harmonic Fourier analysis of a gated blood pool study generates an amplitude value for each pixel which is a function of the stroke counts of that pixel. By summing all the amplitude value ...
Atrial Fibrillation - Arrhythmia Alliance - Patient Information
... AF with medication, called anti-arrhythmic drugs. There are various drugs available for treating the AF episodes. One of these, Flecainide, can be effective at reducing the severity and frequency of the episodes. This drug is only suitable for patients who have no coronary hear t disease. Therefore ...
... AF with medication, called anti-arrhythmic drugs. There are various drugs available for treating the AF episodes. One of these, Flecainide, can be effective at reducing the severity and frequency of the episodes. This drug is only suitable for patients who have no coronary hear t disease. Therefore ...
Natriuretic peptide vs. clinical information for diagnosis of left
... for each of the specific risk factors were multiplied by their actual values and then summed up. For example, individual patient risk score = (β1 × dyspnea at exertion × ankle swelling) + (β2 × coronary artery disease) + (β3 × diuretics). AUC of the clinical risk score indicates its diagnostic value ...
... for each of the specific risk factors were multiplied by their actual values and then summed up. For example, individual patient risk score = (β1 × dyspnea at exertion × ankle swelling) + (β2 × coronary artery disease) + (β3 × diuretics). AUC of the clinical risk score indicates its diagnostic value ...
Radiofrequency Catheter Ablation of Premature Ventricular
... Isolated premature ventricular complexes (PVC) are the most common arrhythmias observed in patients without structural heart disease (1). It has been recently reported that frequent PVC caused left ventricular (LV) dysfunction that can be reversed by suppression of PVC with antiarrhythmic agents (2, ...
... Isolated premature ventricular complexes (PVC) are the most common arrhythmias observed in patients without structural heart disease (1). It has been recently reported that frequent PVC caused left ventricular (LV) dysfunction that can be reversed by suppression of PVC with antiarrhythmic agents (2, ...
Avian Medicine: Princilpes and Application
... arterial pressure to produce higher blood flow rates. High blood pressure is a predisposing factor to aneurysm and aortic rupture in male turkeys of hypertensive strains.53,54 On a body weight basis, smaller birds in general have a bigger heart than larger birds. Systolic blood pressure ranges from ...
... arterial pressure to produce higher blood flow rates. High blood pressure is a predisposing factor to aneurysm and aortic rupture in male turkeys of hypertensive strains.53,54 On a body weight basis, smaller birds in general have a bigger heart than larger birds. Systolic blood pressure ranges from ...
The FDA has approved LifeVest products (e.g., LifeVest WCD 2000
... This Medical Guidance is intended to facilitate the Utilization Management process. It expresses Molina's determination as to whether certain services or supplies are medically necessary, experimental, investigational, or cosmetic for purposes of determining appropriateness of payment. The conclusio ...
... This Medical Guidance is intended to facilitate the Utilization Management process. It expresses Molina's determination as to whether certain services or supplies are medically necessary, experimental, investigational, or cosmetic for purposes of determining appropriateness of payment. The conclusio ...
Right ventricular function in patients with pulmonary hypertension
... (MPI) has been proposed6 – 8 for the evaluation of combined systolic and diastolic ventricular function. This index that can be measured by both pulsed-wave Doppler and tissue Doppler imaging (TDI), has been proved to correlate well with invasive procedures such as catheterization,9 to reflect disea ...
... (MPI) has been proposed6 – 8 for the evaluation of combined systolic and diastolic ventricular function. This index that can be measured by both pulsed-wave Doppler and tissue Doppler imaging (TDI), has been proved to correlate well with invasive procedures such as catheterization,9 to reflect disea ...
Nademanee and Pedro Brugada Josep Brugada, Ramon Brugada
... (syncope), and 190 in group C (asymptomatic). Age at diagnosis (first abnormal ECG documented) was 42⫾16 years (range, 2 to 77 years). Patients with syncope as the initial symptom were older (47⫾14 years) than patients with aborted sudden cardiac death (41⫾16 years) and asymptomatic patients (40⫾16 ...
... (syncope), and 190 in group C (asymptomatic). Age at diagnosis (first abnormal ECG documented) was 42⫾16 years (range, 2 to 77 years). Patients with syncope as the initial symptom were older (47⫾14 years) than patients with aborted sudden cardiac death (41⫾16 years) and asymptomatic patients (40⫾16 ...
Left Ventricular Performance Assessed by
... employing a standard sine-wave analysis, thus including all curve points into the calculation of the left ventricular ejection fraction. Other investigators have shown previously that the ejection fraction determined by similar radioisotope techniques correlates well with the ejection fraction measu ...
... employing a standard sine-wave analysis, thus including all curve points into the calculation of the left ventricular ejection fraction. Other investigators have shown previously that the ejection fraction determined by similar radioisotope techniques correlates well with the ejection fraction measu ...
Risk of Ventricular Arrhythmia After Implantable Defibrillator
... Patient characteristics. Of the 432 patients who agreed to participate in the study, 391 (90.5%) patients were included in the analyses. Patients who were not included had missing data on self-report measures (n ⫽ 10) or clinical variables (n ⫽ 31). Included patients did not differ from excluded pat ...
... Patient characteristics. Of the 432 patients who agreed to participate in the study, 391 (90.5%) patients were included in the analyses. Patients who were not included had missing data on self-report measures (n ⫽ 10) or clinical variables (n ⫽ 31). Included patients did not differ from excluded pat ...
SERIES ‘‘PHYSIOLOGY IN RESPIRATORY MEDICINE’’ A.T. Dinh-Xuan
... ABSTRACT: In pulmonary hypertension and other conditions, such as acute respiratory distress syndrome and left heart failure, right ventricular dysfunction is a prognostic determinant. Therefore, functional parameters pertaining to the right heart alone, i.e. independent of its loading conditions, s ...
... ABSTRACT: In pulmonary hypertension and other conditions, such as acute respiratory distress syndrome and left heart failure, right ventricular dysfunction is a prognostic determinant. Therefore, functional parameters pertaining to the right heart alone, i.e. independent of its loading conditions, s ...
The Weight of the Heart and Its Chambers in with and
... M ORE is known of the physiology of the heart than of any other organ, primarily because of the knowledge of mechanical principles and the development of the sphygmomanometer, roentgenography, electrocardiography and cardiac catheterization. It is, therefore, surprising that a further means of under ...
... M ORE is known of the physiology of the heart than of any other organ, primarily because of the knowledge of mechanical principles and the development of the sphygmomanometer, roentgenography, electrocardiography and cardiac catheterization. It is, therefore, surprising that a further means of under ...
A histological study on the ventricle of convict cichlid, Amatitlania
... show a great variability in different fish. Depending on their shapes, the ventricle can be differentiated as pyramidal, tubular and saccular (Santer, 1985; Sánchez-Quintana et al., 1995; Simões et al., 2002). The pyramidal ventricles were reported in the members of Salmonidae and Scombridae (Farrel ...
... show a great variability in different fish. Depending on their shapes, the ventricle can be differentiated as pyramidal, tubular and saccular (Santer, 1985; Sánchez-Quintana et al., 1995; Simões et al., 2002). The pyramidal ventricles were reported in the members of Salmonidae and Scombridae (Farrel ...
PPT
... A Variety of Rate Response Sensors Exist • Those most accepted in the market place are: – Activity sensors that detect physical movement and increase the rate according to the level of activity ...
... A Variety of Rate Response Sensors Exist • Those most accepted in the market place are: – Activity sensors that detect physical movement and increase the rate according to the level of activity ...
Left Ventricular Hypertrophy in Obese Hypertensives: Is It Really
... and left atrial hypertrophy with the BMI values was considerably better in the group of moderate than in the group of mild hypertension. The r values were 0.62 vs. 0.22 for left ventricular mass and 0.64 vs. 0.26 for left atrial dimension. The group of patients with severe hypertension was character ...
... and left atrial hypertrophy with the BMI values was considerably better in the group of moderate than in the group of mild hypertension. The r values were 0.62 vs. 0.22 for left ventricular mass and 0.64 vs. 0.26 for left atrial dimension. The group of patients with severe hypertension was character ...
Cardiac Magnetic Resonance Imaging to Detect and Evaluate
... the induction of regional contractile dysfunction due to ischemia by addition of dobutamine. Most protocols use an increasing dose of 10, 20, 30 and 40 Ìg/kg/ min with 3 minutes at each stress level. Imaging is repeated at every level in long- and short-axis orientations. The patient should be close ...
... the induction of regional contractile dysfunction due to ischemia by addition of dobutamine. Most protocols use an increasing dose of 10, 20, 30 and 40 Ìg/kg/ min with 3 minutes at each stress level. Imaging is repeated at every level in long- and short-axis orientations. The patient should be close ...
Left Ventricular Mass in Normal Children and its
... to weight, height and body surface area (BSA) in children and to determine the sex differences. We evaluated 208 children (143 males and 65 females), aged 1 day to 14 years who had no cardiovascular disease. The end-diastolic left ventricular internal dimension (LVIDd), end-diastolic left ventricula ...
... to weight, height and body surface area (BSA) in children and to determine the sex differences. We evaluated 208 children (143 males and 65 females), aged 1 day to 14 years who had no cardiovascular disease. The end-diastolic left ventricular internal dimension (LVIDd), end-diastolic left ventricula ...
Fibrosis as a contributing factor to the induction of ventricular
... In contrast, in a fibrotic tissue, groups of cardiomyocytes are separated by a network of collagen fibres and therefore an individual cardiomyocyte is electrically coupled with a smaller number of adjacent cells. Thus, the afterdepolarization arising in such an environment much more likely excites a ...
... In contrast, in a fibrotic tissue, groups of cardiomyocytes are separated by a network of collagen fibres and therefore an individual cardiomyocyte is electrically coupled with a smaller number of adjacent cells. Thus, the afterdepolarization arising in such an environment much more likely excites a ...
Measurement of right ventricular volume in healthy term and preterm
... persistent pulmonary hypertension of the newborn and respiratory distress syndrome.8 Right ventricular pathophysiology is potentially important in these conditions. The ability of the right ventricle to maintain adequate pulmonary blood flow despite increased pulmonary vascular resistance may be cri ...
... persistent pulmonary hypertension of the newborn and respiratory distress syndrome.8 Right ventricular pathophysiology is potentially important in these conditions. The ability of the right ventricle to maintain adequate pulmonary blood flow despite increased pulmonary vascular resistance may be cri ...
Study of the Myocardial Contraction and Relaxation Velocities
... ficantly greater than the velocities of contraction, in the majority of myocardial segments. Despite this, a limitation of this method is that it does not enhance the difference between the velocities observed in the apical and basal segments. Doppler tissue imaging, as with any type of Doppler, dep ...
... ficantly greater than the velocities of contraction, in the majority of myocardial segments. Despite this, a limitation of this method is that it does not enhance the difference between the velocities observed in the apical and basal segments. Doppler tissue imaging, as with any type of Doppler, dep ...
BiPACS Accomplishments - UCLA Department of Surgery
... tools for pharmacologic and mechanical support. This predetermines increased dependence on these tools, increased costs, and an increase in related complications. ...
... tools for pharmacologic and mechanical support. This predetermines increased dependence on these tools, increased costs, and an increase in related complications. ...
Survival and Function of Bioengineered Cardiac Grafts
... repair of congenital cardiac defects. Implanted as a substitute for the wall of a cardiac chamber or an artery, the graft should be able to grow and remodel with the growth of the child. These tissue-engineered grafts have the potential to reduce morbidity and mortality and improve the quality of li ...
... repair of congenital cardiac defects. Implanted as a substitute for the wall of a cardiac chamber or an artery, the graft should be able to grow and remodel with the growth of the child. These tissue-engineered grafts have the potential to reduce morbidity and mortality and improve the quality of li ...
The 12-Lead ECG Placement of Electrodes Placement of Electrodes
... Typical Layout of the 1212-lead ...
... Typical Layout of the 1212-lead ...
Magnetic Resonance Imaging in Various Non-ischemic
... and hemodynamic relevance of the disease and long-term follow-up after therapy is needed. Thus, imaging techniques are important in the diagnosis and therapy of cardiomyopathies. ...
... and hemodynamic relevance of the disease and long-term follow-up after therapy is needed. Thus, imaging techniques are important in the diagnosis and therapy of cardiomyopathies. ...
Ventricular fibrillation
Ventricular fibrillation (V-fib or VF) is a condition in which there is uncoordinated contraction of the cardiac muscle of the ventricles in the heart, making them quiver rather than contract properly. Ventricular fibrillation is the most commonly identified arrhythmia in cardiac arrest patients. While there is some activity, the lay person is usually unable to detect it by palpating (feeling) the major pulse points of the carotid and femoral arteries. Such an arrhythmia is only confirmed by electrocardiography. Ventricular fibrillation is a medical emergency that requires prompt Advanced Life Support interventions. If this arrhythmia continues for more than a few seconds, it will likely degenerate further into asystole (""flatline""). This condition results in cardiogenic shock and cessation of effective blood circulation. As a consequence, sudden cardiac death (SCD) will result in a matter of minutes. If the patient is not revived after a sufficient period (within roughly 5 minutes at room temperature), the patient could sustain irreversible brain damage and possibly become brain-dead, due to the effects of cerebral hypoxia. On the other hand, death often occurs if sinus rhythm is not restored within 90 seconds of the onset of VF, especially if it has degenerated further into asystole.