Learn ECG in a Day
... Before Einthoven’s time, it was known that electrical currents were produced by the beating of the heart, but this phenomenon could not be measured accurately without placing electrodes directly over the heart. Einthoven completed a series of prototypes of string galvanometers in 1901. The device ...
... Before Einthoven’s time, it was known that electrical currents were produced by the beating of the heart, but this phenomenon could not be measured accurately without placing electrodes directly over the heart. Einthoven completed a series of prototypes of string galvanometers in 1901. The device ...
pericardial effusions by echocardiography - Heart
... patients with pericardial effusions. The next important advance occurred when Horowitz et al. (1974) correlated the amount of fluid within the pericardial cavity with the width of the echo-free space between the epicardium of the left ventricular posterior wall and the parietal pericardium. Accordin ...
... patients with pericardial effusions. The next important advance occurred when Horowitz et al. (1974) correlated the amount of fluid within the pericardial cavity with the width of the echo-free space between the epicardium of the left ventricular posterior wall and the parietal pericardium. Accordin ...
The Autonomic Nervous System and Atrial Fibrillation:The
... PV. Of importance, GP activation is achieved with electrica stimulation using high frequency (20 Hz) and very short stimuli duration (0.1 ms). During sinus rhythm, these stimulation parameters, which slow the heart rate, are delivered at a voltage that does not excite the atrium but does activate th ...
... PV. Of importance, GP activation is achieved with electrica stimulation using high frequency (20 Hz) and very short stimuli duration (0.1 ms). During sinus rhythm, these stimulation parameters, which slow the heart rate, are delivered at a voltage that does not excite the atrium but does activate th ...
PDF Full-text
... which was comparable with heart transplantation [6,7]. A recent analysis of the Interagency Registry for Mechanically Assisted Circulatory Support (INTERMACS) has showed greater durability for continuous flow LVADs in comparison with pulsatile flow devices [8] and confirmed its increasing trend [9]. ...
... which was comparable with heart transplantation [6,7]. A recent analysis of the Interagency Registry for Mechanically Assisted Circulatory Support (INTERMACS) has showed greater durability for continuous flow LVADs in comparison with pulsatile flow devices [8] and confirmed its increasing trend [9]. ...
The Cardiac Conduction System
... junction and His-Purkinje system, are capable of developing spontaneous diastolic depolarization. Rhythms generated by ...
... junction and His-Purkinje system, are capable of developing spontaneous diastolic depolarization. Rhythms generated by ...
PDF - Circulation: Cardiovascular Quality and Outcomes
... questionnaire (St Jude Medical, St Paul, MN). The AFEQT is a 20item questionnaire assessing 3 domains of AF-related quality of life, including activity, symptoms, and treatment concerns.11,13 An overall summary score can be calculated from these domains and was used for the primary analyses in this ...
... questionnaire (St Jude Medical, St Paul, MN). The AFEQT is a 20item questionnaire assessing 3 domains of AF-related quality of life, including activity, symptoms, and treatment concerns.11,13 An overall summary score can be calculated from these domains and was used for the primary analyses in this ...
Effect of Rate on Left Ventricular Volumes and Ejection Fraction
... The patients with cardiomegaly had their pacemakers programmed to the rate that provided the highest resting cardiac index. These patients were restudied an average of 4.3 months later. No significant changes were noted between values recorded during the initial study and the later study at the same ...
... The patients with cardiomegaly had their pacemakers programmed to the rate that provided the highest resting cardiac index. These patients were restudied an average of 4.3 months later. No significant changes were noted between values recorded during the initial study and the later study at the same ...
Birger Axelsson - Umeå universitet
... Today, the majority of patients who need acute inotropic drug support are not admitted to cardiology wards, but are often managed in intensive care units or in operating theatres. Sometimes they undergo major operations, including cardiac surgery. Anaesthesiologists often have to take care of older ...
... Today, the majority of patients who need acute inotropic drug support are not admitted to cardiology wards, but are often managed in intensive care units or in operating theatres. Sometimes they undergo major operations, including cardiac surgery. Anaesthesiologists often have to take care of older ...
abnormal curves in terms of the pathological conditions with which
... for any particular individual unless intra-pleural pressure is simultaneously recorded. Such a record, obtained by a method recently described (8), from patient No. 45, studied prior to a refill of a pneumothorax induced 5 days previously, is shown in Figure 1C. While this sutbject was not wlholly n ...
... for any particular individual unless intra-pleural pressure is simultaneously recorded. Such a record, obtained by a method recently described (8), from patient No. 45, studied prior to a refill of a pneumothorax induced 5 days previously, is shown in Figure 1C. While this sutbject was not wlholly n ...
Impact of Cardiac Contractility Modulation on Left Ventricular Global
... Downloaded from imaging.onlinejacc.org by Gabriel Yip on January 28, 2010 ...
... Downloaded from imaging.onlinejacc.org by Gabriel Yip on January 28, 2010 ...
The contribution of mitral annular excursion and shape - AJP
... the segments´ area and their incremental excursion. The 3D LV volumes were calculated by tracing the endocardial border in 6 coaxial planes. The AEV (10±2 ml) represented 19±3% of the total LV stroke volume (52±12 ml). The AEV correlated strongly with LV stroke volume (r = 0.73, p<0.05). Peak MA are ...
... the segments´ area and their incremental excursion. The 3D LV volumes were calculated by tracing the endocardial border in 6 coaxial planes. The AEV (10±2 ml) represented 19±3% of the total LV stroke volume (52±12 ml). The AEV correlated strongly with LV stroke volume (r = 0.73, p<0.05). Peak MA are ...
Atrial Fibrillation: New Horizons
... seems to be the best way for reverse remodeling of atria during atrial fibrillation. Antiarrhythmic drugs (AADs) are only modestly effective. Of these amiodarone seems to provide the most benefits. Drugs like verapamil and ACE inhibitors may also help as adjuvant therapies in the reverse remodeling ...
... seems to be the best way for reverse remodeling of atria during atrial fibrillation. Antiarrhythmic drugs (AADs) are only modestly effective. Of these amiodarone seems to provide the most benefits. Drugs like verapamil and ACE inhibitors may also help as adjuvant therapies in the reverse remodeling ...
Wide-QRS-Complex Tachycardia with a Negative Concordance
... SVTs can be misleading, challenging the diagnostic accuracy of these algorithms. In our case, the occurrence of aberrancy after the onset of tachycardia without any detectable alteration in the cycle length of the tachycardia, could be attributed not to the classical Ashman phenomenon, but to the un ...
... SVTs can be misleading, challenging the diagnostic accuracy of these algorithms. In our case, the occurrence of aberrancy after the onset of tachycardia without any detectable alteration in the cycle length of the tachycardia, could be attributed not to the classical Ashman phenomenon, but to the un ...
Philips HeartStart FR2+ Defibrillator
... shows at a glance whether the FR2+ has passed its last self-test and is ready for use. Reliable analysis technologies The FR2+ uses Philips' patented SMART Analysis algorithm to assess the patient's heart rhythm and determine if it is shockable. Research shows that for some patients, especially thos ...
... shows at a glance whether the FR2+ has passed its last self-test and is ready for use. Reliable analysis technologies The FR2+ uses Philips' patented SMART Analysis algorithm to assess the patient's heart rhythm and determine if it is shockable. Research shows that for some patients, especially thos ...
Two components of delayed rectifier K+ current in heart: molecular
... differences of IKr. It is possible that the native IKr could result from a mixture of N-terminal or C-terminal splice variants with HERG1 to form homomultimers or heteromultimers. Different expression of N-terminal truncated isoform would alter the kinetics of the endogenous IKr, while different exp ...
... differences of IKr. It is possible that the native IKr could result from a mixture of N-terminal or C-terminal splice variants with HERG1 to form homomultimers or heteromultimers. Different expression of N-terminal truncated isoform would alter the kinetics of the endogenous IKr, while different exp ...
Evidence of Incomplete Left Ventricular Relaxation in the Dog
... beat began before 3.5 T but did not always occur under these conditions. Thus, an increase in end diastolic pressure relative to diastolic volume may result from incomplete relaxation under conditions of sufficiently rapid heart rate or sufficiently prolonged ventricular relaxation. Incomplete relax ...
... beat began before 3.5 T but did not always occur under these conditions. Thus, an increase in end diastolic pressure relative to diastolic volume may result from incomplete relaxation under conditions of sufficiently rapid heart rate or sufficiently prolonged ventricular relaxation. Incomplete relax ...
Left Stellate Ganglion and Vagal Nerve Activity and Cardiac
... number of HASDA episodes/h over a 24-h period. The 7:00 AM to 8:00 AM peaks correlated with the time of awakening and the arrival of the vivarium staff. Cosinor tests showed significant circadian variation of the HASDA episodes at baseline (p ⫽ 0.0019) and during CHF (p ⫽ 0.0008). The HASDA is rarel ...
... number of HASDA episodes/h over a 24-h period. The 7:00 AM to 8:00 AM peaks correlated with the time of awakening and the arrival of the vivarium staff. Cosinor tests showed significant circadian variation of the HASDA episodes at baseline (p ⫽ 0.0019) and during CHF (p ⫽ 0.0008). The HASDA is rarel ...
The apical long-axis rather than the two
... used as a reference. Twenty-seven patients underwent precordial three-dimensional echocardiography using rotational acquisition of planes at 2-degree intervals, with ECG and respiratory gating. End-diastolic and end-systolic left ventricular volumes and ejection fraction on threedimensional echocard ...
... used as a reference. Twenty-seven patients underwent precordial three-dimensional echocardiography using rotational acquisition of planes at 2-degree intervals, with ECG and respiratory gating. End-diastolic and end-systolic left ventricular volumes and ejection fraction on threedimensional echocard ...
Pharmacologic and Non-Pharmacologic Treatment of Chronic Atrial
... Atrial fibrillation with poor ventricular rate control can cause electrical and structural remodeling of the ventricle, leading to ventricular dilatation and impairment of systolic function, known as “tachycardia induced cardiomyopathy”. Stroke and thromboembolism are a major cause of mortality and ...
... Atrial fibrillation with poor ventricular rate control can cause electrical and structural remodeling of the ventricle, leading to ventricular dilatation and impairment of systolic function, known as “tachycardia induced cardiomyopathy”. Stroke and thromboembolism are a major cause of mortality and ...
Fully automated tracking of cardiac structures using radiopaque
... The heart is a predominantly muscular, hollow organ that—under physiological conditions at rest—beats rhythmically 60–80/min. Under pathophysiological conditions such as e.g. myocardial infarction or cardiomyopathy, geometry, dynamics and function of the heart muscle and valves may alter significant ...
... The heart is a predominantly muscular, hollow organ that—under physiological conditions at rest—beats rhythmically 60–80/min. Under pathophysiological conditions such as e.g. myocardial infarction or cardiomyopathy, geometry, dynamics and function of the heart muscle and valves may alter significant ...
The formation and function of the cardiac conduction system
... supply the embryo with nutrients and oxygen. From the beginning of its formation, the heart itself generates and propagates the electrical impulse that is required to initiate coordinated contractions to efficiently pump blood throughout the body. In the developed heart, these functions are performe ...
... supply the embryo with nutrients and oxygen. From the beginning of its formation, the heart itself generates and propagates the electrical impulse that is required to initiate coordinated contractions to efficiently pump blood throughout the body. In the developed heart, these functions are performe ...
Increased cardiac work provides a link between systemic
... et al. 2015). Body mass was largest at 14 month for both animal types and no significant differences between animal types were observed. SHR group LV mass was not significantly different from the WKY group at 3 month, but significantly greater than control at 14 and 21 month. These differences were ...
... et al. 2015). Body mass was largest at 14 month for both animal types and no significant differences between animal types were observed. SHR group LV mass was not significantly different from the WKY group at 3 month, but significantly greater than control at 14 and 21 month. These differences were ...
The Relationship Between Atrial Fibrillation and Chronic
... heart failure is associated with an increased risk for adverse cardiac events.75-77 CKD is associated with a 1.4-fold and 2.4-fold higher risk for new-onset heart failure in men and women, respectively, compared to persons with normal renal function.78 Although common risk factors such as diabetes a ...
... heart failure is associated with an increased risk for adverse cardiac events.75-77 CKD is associated with a 1.4-fold and 2.4-fold higher risk for new-onset heart failure in men and women, respectively, compared to persons with normal renal function.78 Although common risk factors such as diabetes a ...
Regional Differences in Ventricular Fibrillation in the Open
... Abstract—It has been hypothesized that during ventricular fibrillation (VF), the fastest activating region, the dominant domain, contains a stable reentrant circuit called a mother rotor. This hypothesis postulates that the mother rotor spawns wavefronts that propagate to maintain VF elsewhere and i ...
... Abstract—It has been hypothesized that during ventricular fibrillation (VF), the fastest activating region, the dominant domain, contains a stable reentrant circuit called a mother rotor. This hypothesis postulates that the mother rotor spawns wavefronts that propagate to maintain VF elsewhere and i ...
Aalborg Universitet Death and Life-Threatening Arrhythmias After Myocardial Infarction
... the measurements of time to peak strain. If 6 or more segments did not have sufficient tracking, the patient was excluded from the analyses. Follow-up and endpoint definition. The primary outcome was a composite of definite or suspected SCD, admission with documented VA, or appropriate ICD discharge on ...
... the measurements of time to peak strain. If 6 or more segments did not have sufficient tracking, the patient was excluded from the analyses. Follow-up and endpoint definition. The primary outcome was a composite of definite or suspected SCD, admission with documented VA, or appropriate ICD discharge on ...
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.