The Clinical Value of Frequency Analysis ofthe First
... varied stepwise in 10 cps increments from 30 cps to 70 cps. The final outputs for analysis were recorded with a multichannel Hewlett-Packard photographic recorder (series 560) at a paper speed of 100 mm/sec. The outputs consisted of an electrocardiogram, a standard phonocardiogram, "total first hear ...
... varied stepwise in 10 cps increments from 30 cps to 70 cps. The final outputs for analysis were recorded with a multichannel Hewlett-Packard photographic recorder (series 560) at a paper speed of 100 mm/sec. The outputs consisted of an electrocardiogram, a standard phonocardiogram, "total first hear ...
Assessment of Ventricular Function with Cardiovascular Magnetic
... advantageous, because one can calculate LV volumes without using formulae that require assumptions about LV shape. For this reason, the Simpson’s rule technique is useful in patients who have cardiomyopathy or regional wall motion abnormalities. The area length techniques are based on formulae that ...
... advantageous, because one can calculate LV volumes without using formulae that require assumptions about LV shape. For this reason, the Simpson’s rule technique is useful in patients who have cardiomyopathy or regional wall motion abnormalities. The area length techniques are based on formulae that ...
A Study of Human Right Ventricular False Tendons: Morphology
... al. 1966), false tendons3 (Pomerance, 1975). False tendons have generally been considered as normal anatomic variants4,5 but numerous clinical abnormalities have been reported1,3,4. Cardiologists are now interested because of their possible association with innocent murmur4 and role in ventricular a ...
... al. 1966), false tendons3 (Pomerance, 1975). False tendons have generally been considered as normal anatomic variants4,5 but numerous clinical abnormalities have been reported1,3,4. Cardiologists are now interested because of their possible association with innocent murmur4 and role in ventricular a ...
The Treatment of Atrial Fibrillation - Michigan Medicine
... Because the ablation procedure itself may temporarily irritate the heart and cause atrial fibrillation, patients often are treated with a medication to suppress atrial fibrillation for 2-3 months afterwards. When atrial fibrillation has been chronic, the heart develops a “memory” for the atrial fibr ...
... Because the ablation procedure itself may temporarily irritate the heart and cause atrial fibrillation, patients often are treated with a medication to suppress atrial fibrillation for 2-3 months afterwards. When atrial fibrillation has been chronic, the heart develops a “memory” for the atrial fibr ...
ECG Guide - Banner Health
... than 3mm in height. PRI (PR Interval): Is representative of the spread of the atrial depolarization wave, and the time it takes for the impulse to conduct through the AV node and to the ventricles. The PRI is marked from the start of the P-Wave to the beginning of the QRS. The PRI is normally no mor ...
... than 3mm in height. PRI (PR Interval): Is representative of the spread of the atrial depolarization wave, and the time it takes for the impulse to conduct through the AV node and to the ventricles. The PRI is marked from the start of the P-Wave to the beginning of the QRS. The PRI is normally no mor ...
Public Health Service DEPARTMENT OF HEALTH & HUMAN SERVICES
... and Critical Care Researchers stated that research can and should be done in clinical circumstances where it is not feasible to obtain informed, prospective, or proxy consent for enrollment in a study protocol .41-11 The coalition also endorsed a new risk category called "appropriate incremental ris ...
... and Critical Care Researchers stated that research can and should be done in clinical circumstances where it is not feasible to obtain informed, prospective, or proxy consent for enrollment in a study protocol .41-11 The coalition also endorsed a new risk category called "appropriate incremental ris ...
Isotretinoin (13-cis-retinoic acid)-associated premature ventricular
... and Stern2 described a 26-year-old woman who developed symptomatic episodes of sinus tachycardia after each dose of isotretinoin. Premature ventricular contractions (PVCs) are characterized by an early beat with a wide and abnormal QRS complex, without a preceding P wave. T wave axis is usually oppo ...
... and Stern2 described a 26-year-old woman who developed symptomatic episodes of sinus tachycardia after each dose of isotretinoin. Premature ventricular contractions (PVCs) are characterized by an early beat with a wide and abnormal QRS complex, without a preceding P wave. T wave axis is usually oppo ...
Simultaneous three-dimensional myocardial T1 QALAS
... identify the area of myocardial infarction and to assess acute and chronic myocardial infarction [3]. Diffuse tissue changes such as diffuse fibrosis may be quantified noninvasively using T1 mapping where remote, normal, myocardium is not accessible for comparison [4-6]. Quantitative T2-mapping tech ...
... identify the area of myocardial infarction and to assess acute and chronic myocardial infarction [3]. Diffuse tissue changes such as diffuse fibrosis may be quantified noninvasively using T1 mapping where remote, normal, myocardium is not accessible for comparison [4-6]. Quantitative T2-mapping tech ...
Cardiogenic Shock - The Association of Physicians of India
... monitoring and the treatment of life-threatening ventricular arrhythmias, cardiogenic shock has emerged as the most common cause of death among patients admitted to the hospital with acute myocardial infarction. The incidence of Cardiogenic shock complicating acute myocardial infarction ranges from ...
... monitoring and the treatment of life-threatening ventricular arrhythmias, cardiogenic shock has emerged as the most common cause of death among patients admitted to the hospital with acute myocardial infarction. The incidence of Cardiogenic shock complicating acute myocardial infarction ranges from ...
Timing of Depolarization and Contraction in the Paced
... Furthermore, in the subendocardium, the wave is propagating faster than in the rest of the myocardium. The related parameters, being velocities of wave propagation perpendicular to the myofibers and along the myofibers in the subendocardial layers, respectively, were estimated by fitting the model t ...
... Furthermore, in the subendocardium, the wave is propagating faster than in the rest of the myocardium. The related parameters, being velocities of wave propagation perpendicular to the myofibers and along the myofibers in the subendocardial layers, respectively, were estimated by fitting the model t ...
Arrhythmogenic Disorders of Genetic Origin
... Most patients with familial DCM have isolated heart muscle disease; however, extracardiomyopathic phenotypes are present in a minority of cases (Table 2). Associated or preceding conduction disease and supraventricular arrhythmia (DCM+E) are characteristic of DCM associated with LMNA,37 EMD, or SCN5 ...
... Most patients with familial DCM have isolated heart muscle disease; however, extracardiomyopathic phenotypes are present in a minority of cases (Table 2). Associated or preceding conduction disease and supraventricular arrhythmia (DCM+E) are characteristic of DCM associated with LMNA,37 EMD, or SCN5 ...
The effect of myocardial fibrosis on left ventricular torsion
... twist during the systolic phase is rapidly released during LV untwisting and constitutes an important determinant of diastolic suction and function [5]. Two-dimensional speckle tracking imaging (2D-STI) is a novel ultrasound technique for quantification of LV regional deformation, myocardial rotatio ...
... twist during the systolic phase is rapidly released during LV untwisting and constitutes an important determinant of diastolic suction and function [5]. Two-dimensional speckle tracking imaging (2D-STI) is a novel ultrasound technique for quantification of LV regional deformation, myocardial rotatio ...
Review for EKG`s 2016 ACLS v5.1
... strip, your skills will grow and your interpretations will be consistently accurate. Remember to print a 6 second strip (or longer) each and every time you begin an interpretation. Follow the six basic steps (your recipe) for rhythm interpretation. When looking at a cardiac rhythm ask yourself the f ...
... strip, your skills will grow and your interpretations will be consistently accurate. Remember to print a 6 second strip (or longer) each and every time you begin an interpretation. Follow the six basic steps (your recipe) for rhythm interpretation. When looking at a cardiac rhythm ask yourself the f ...
The EP Show
... During cardiac arrest potassium is taken up inside cells, and so the initial potassium measurement in most patients will be low "It's probably better to think of hypokalemia as a trigger, rather than as a cause, of the cardiac arrest." Dorian ...
... During cardiac arrest potassium is taken up inside cells, and so the initial potassium measurement in most patients will be low "It's probably better to think of hypokalemia as a trigger, rather than as a cause, of the cardiac arrest." Dorian ...
Cardiac Rhythm Management Devices (Part I)
... prolongation (type II or Mobitz 2° AVHB). Type I 2° AVHB is usually associated with a narrow QRS complex, and type II 2° AVHB with a wide QRS complex.10 In general, type I 2° AVHB with a narrow QRS complex almost always occurs at the atrioventricular node.10 When associated with bundle-branch block, ...
... prolongation (type II or Mobitz 2° AVHB). Type I 2° AVHB is usually associated with a narrow QRS complex, and type II 2° AVHB with a wide QRS complex.10 In general, type I 2° AVHB with a narrow QRS complex almost always occurs at the atrioventricular node.10 When associated with bundle-branch block, ...
Is Impedance Cardiography-Derived Systolic Time
... Overall accuracy was 90.4%. Of the five patients in which STR did not correctly indicate EF category, two were from MUGA EF and three were from echo EF. ...
... Overall accuracy was 90.4%. Of the five patients in which STR did not correctly indicate EF category, two were from MUGA EF and three were from echo EF. ...
Cryoablation Lesion with Atrial Arrhythmia after Fontan Operation
... tissue with different electrical properties are juxtaposed and this may potentiate development of AF. Although there is the critical importance of pulmonary vein in patients with paroxysmal AF, it may not apply to persistent or permanent AF. ...
... tissue with different electrical properties are juxtaposed and this may potentiate development of AF. Although there is the critical importance of pulmonary vein in patients with paroxysmal AF, it may not apply to persistent or permanent AF. ...
(1-7)对腹主动脉缩窄大鼠心肌肥厚和纤维化的影响
... The rats with aortic coarctation received Ang-(1-7) (25 μg·kg-1·h-1) or saline (0.25 μl/h) and the sham-operated rats received saline infusion. With this approach, plasma Ang-(1-7) level was maintained at 917.8±194.1 pmol/L[18], at the concentration of which Ang-(1-7) binds to the Mas receptor and h ...
... The rats with aortic coarctation received Ang-(1-7) (25 μg·kg-1·h-1) or saline (0.25 μl/h) and the sham-operated rats received saline infusion. With this approach, plasma Ang-(1-7) level was maintained at 917.8±194.1 pmol/L[18], at the concentration of which Ang-(1-7) binds to the Mas receptor and h ...
Definition of terms related to cardiac rhythm
... A premature impulse which usually shows a fixed and probably causal relationship to the preceding activation of the same cardiac chamber. Extrasystoles may also be induced electrically or mechanically. In such cases a causal relationship to the preceding activation is usually absent. (see also captu ...
... A premature impulse which usually shows a fixed and probably causal relationship to the preceding activation of the same cardiac chamber. Extrasystoles may also be induced electrically or mechanically. In such cases a causal relationship to the preceding activation is usually absent. (see also captu ...
Atrial fibrillation and physical activity
... Clinical Review | Atrial fibrillation and physical activity than 4 decades since Kannel’s observation, a paradox has arisen in the manifestation of physical activity (PA) in North America. Data from the Canadian Health Measures Survey using accelerometry, rather than self-reported estimations, sugg ...
... Clinical Review | Atrial fibrillation and physical activity than 4 decades since Kannel’s observation, a paradox has arisen in the manifestation of physical activity (PA) in North America. Data from the Canadian Health Measures Survey using accelerometry, rather than self-reported estimations, sugg ...
PDF file - Via Medica Journals
... the heart rate must be made. A useful method in order to correct the current value of the QT interval is to use one of the available formulas (i.e., Bazett’s, Fridericia’s, Ashman’s, Hodges’ and the Framingham formula,). However, there is no general consensus on the best formula to be useful in clin ...
... the heart rate must be made. A useful method in order to correct the current value of the QT interval is to use one of the available formulas (i.e., Bazett’s, Fridericia’s, Ashman’s, Hodges’ and the Framingham formula,). However, there is no general consensus on the best formula to be useful in clin ...
Septal myocardial protection during cardiac surgery
... transverse fibers, which compress the cavity in a bellows like fashion while contracting, an action that is not directly related to those oblique fibers comprising the septum that normally twist during contraction. The importance of the septum versus the free wall was defined by several studies show ...
... transverse fibers, which compress the cavity in a bellows like fashion while contracting, an action that is not directly related to those oblique fibers comprising the septum that normally twist during contraction. The importance of the septum versus the free wall was defined by several studies show ...
A clinical approach to the assessment of left ventricular diastolic
... during the isovolumic relaxation phase. This would occur after a significant number of myocardial cells had entered cellular diastole and is a metabolically active phase. The left ventricular pressure will continue to fall rapidly, with opening of the mitral valve occurring when the left ventricular ...
... during the isovolumic relaxation phase. This would occur after a significant number of myocardial cells had entered cellular diastole and is a metabolically active phase. The left ventricular pressure will continue to fall rapidly, with opening of the mitral valve occurring when the left ventricular ...
Medline search : references : 1996-2009
... (ACE) gene has made it possible to identify a deletion (D)-insertion (I) polymorphism that appears to affect the level of serum ACE activity. The aim of this study was to assess whether physiologic left ventricular hypertrophy as a result of physical training is associated with an increased QT lengt ...
... (ACE) gene has made it possible to identify a deletion (D)-insertion (I) polymorphism that appears to affect the level of serum ACE activity. The aim of this study was to assess whether physiologic left ventricular hypertrophy as a result of physical training is associated with an increased QT lengt ...
Alternate Pacing Sites in the Atria and the Right Ventricle
... apex of the right ventricle. 1 Since then, for many years, whenever a pacemaker was needed pacing was from the right ventricular apex in almost all cases. The reason for choosing this site was that it ensured satisfactory stability of pacing because of the anatomy of the right ventricular apex. Howe ...
... apex of the right ventricle. 1 Since then, for many years, whenever a pacemaker was needed pacing was from the right ventricular apex in almost all cases. The reason for choosing this site was that it ensured satisfactory stability of pacing because of the anatomy of the right ventricular apex. Howe ...
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.