7The use of fMRI to detect neural responses to cognitive tasks: is
... time series were subdivided into epochs corresponding to each of the fMRI scans (a single volume was acquired in 2.3 s). Since the RR interval times are irregularly sampled over time they cannot be directly used as IBI regressor. To compute an IBI value per fMRI epoch, all RR intervals were averaged ...
... time series were subdivided into epochs corresponding to each of the fMRI scans (a single volume was acquired in 2.3 s). Since the RR interval times are irregularly sampled over time they cannot be directly used as IBI regressor. To compute an IBI value per fMRI epoch, all RR intervals were averaged ...
Connecting Leads to Boston Scientific Pacemakers, Defibrillators
... ALTRUA® 20/40); MV mode in patients with both unipolar atrial and ventricular leads (INSIGNIA® Ultra, ALTRUA® 60); single-chamber atrial pacing in patients with impaired AV nodal conduction; atrial tracking modes for patients with chronic refractory atrial tachyarrhythmias, which might trigger ventr ...
... ALTRUA® 20/40); MV mode in patients with both unipolar atrial and ventricular leads (INSIGNIA® Ultra, ALTRUA® 60); single-chamber atrial pacing in patients with impaired AV nodal conduction; atrial tracking modes for patients with chronic refractory atrial tachyarrhythmias, which might trigger ventr ...
Document
... cardiomyopathy. Symptoms are not specific; patients may present with chest pain, fatigue, dyspnea, or arrhythmia. ...
... cardiomyopathy. Symptoms are not specific; patients may present with chest pain, fatigue, dyspnea, or arrhythmia. ...
Drug-induced heart failure
... anthracycline-induced heart failure is generally considered to be irreversible, some reports on complete recovery of cardiac dysfunction have been published (13). The severity of anthracycline-induced cardiomyopathy can be quantified with the help of a morphologic grading system (14). In an endomyoc ...
... anthracycline-induced heart failure is generally considered to be irreversible, some reports on complete recovery of cardiac dysfunction have been published (13). The severity of anthracycline-induced cardiomyopathy can be quantified with the help of a morphologic grading system (14). In an endomyoc ...
Atrioventricular N odal Response to Retrograde Activation in Atrial
... selected for this study. To avoid patient discomfort and risk during this kind of study, we decided to investigate only patients with an al ready implanted multiprogrammable ventricular pacemaker. Indications for pacemaker implantation had been either symptomatic sick sinus syndrome or AF with dizzy ...
... selected for this study. To avoid patient discomfort and risk during this kind of study, we decided to investigate only patients with an al ready implanted multiprogrammable ventricular pacemaker. Indications for pacemaker implantation had been either symptomatic sick sinus syndrome or AF with dizzy ...
Pacemakers and ICDs-2012 - UCSF Department of Anesthesia and
... Emergency surgery, especially when there is not enough time to gather device information, or if the patient is unable to provide information about a pacemaker or ICD, could very well result in device malfunction from hyperkalemia, hypoxia, or an unknown antiarrhythmic agent the patient may be chroni ...
... Emergency surgery, especially when there is not enough time to gather device information, or if the patient is unable to provide information about a pacemaker or ICD, could very well result in device malfunction from hyperkalemia, hypoxia, or an unknown antiarrhythmic agent the patient may be chroni ...
Effect of adenosine on heart rate variability in
... raises heart rate by decreasing parasympathetic and increasing cardiac sympathetic tone. These reflex effects may become clinically relevant during adenosine stress testing, or when endogenous adenosine is increased, such as during ischaemia, exercise or vasodepressor reactions, or in heart failure. ...
... raises heart rate by decreasing parasympathetic and increasing cardiac sympathetic tone. These reflex effects may become clinically relevant during adenosine stress testing, or when endogenous adenosine is increased, such as during ischaemia, exercise or vasodepressor reactions, or in heart failure. ...
ICD-10-CM: Myocardial Infarction
... Occlusive intracoronary thrombus - a substance called plaque can build up in the walls of your coronary arteries. This plaque is made up of cholesterol and other cells. A heart attack may occur when a tear in the plaque occurs which triggers blood platelets and other substances to form a blood a clo ...
... Occlusive intracoronary thrombus - a substance called plaque can build up in the walls of your coronary arteries. This plaque is made up of cholesterol and other cells. A heart attack may occur when a tear in the plaque occurs which triggers blood platelets and other substances to form a blood a clo ...
3-114 Card Implants for Surgery - Cardiac Pacemakers
... Sec. 870.3610 Implantable pacemaker pulse generator. (a)Identification. An implantable pacemaker pulse generator is a device that has a power supply and electronic circuits that produce a periodic electrical pulse to stimulate the heart. This device is used as a substitute for the heart's intrinsic ...
... Sec. 870.3610 Implantable pacemaker pulse generator. (a)Identification. An implantable pacemaker pulse generator is a device that has a power supply and electronic circuits that produce a periodic electrical pulse to stimulate the heart. This device is used as a substitute for the heart's intrinsic ...
Incidence and etiology of sudden cardiac death in young athletes
... A considerable subset of SCDs, however, occur in the absence of an evident structural or electrical cardiac disorder. In Burkes study, 6/34 sports-related SCDs were of unknown causes [10], while other studies have found a “normal heart” in 1–7% of SCD cases [11, 38, 56]. As channelopathies do not pr ...
... A considerable subset of SCDs, however, occur in the absence of an evident structural or electrical cardiac disorder. In Burkes study, 6/34 sports-related SCDs were of unknown causes [10], while other studies have found a “normal heart” in 1–7% of SCD cases [11, 38, 56]. As channelopathies do not pr ...
Temperature as a modifier of fish cardiac contractility
... environmental adaptation, heart mass, heart rate, ryanodine receptors (RyR), sarcoplasmic reticulum, temperature acclimation, Burbot, Lota lota (L.), crucian carp, Carassius carassius (L.), rainbow trout, Oncorhynchus mykiss. The fish heart is a four-chambered organ, which powers the circulation of ...
... environmental adaptation, heart mass, heart rate, ryanodine receptors (RyR), sarcoplasmic reticulum, temperature acclimation, Burbot, Lota lota (L.), crucian carp, Carassius carassius (L.), rainbow trout, Oncorhynchus mykiss. The fish heart is a four-chambered organ, which powers the circulation of ...
Invasive and non-invasive methods for cardiac output measurement
... contour, partial CO2 rebreathing and thoracic electrical bioimpedance. All of them have their advantages and disadvantages, but thermodilution is the golden standard for critical patients, although it does entail many risks. The ideal system for cardiac output monitoring would be non-invasive, easy ...
... contour, partial CO2 rebreathing and thoracic electrical bioimpedance. All of them have their advantages and disadvantages, but thermodilution is the golden standard for critical patients, although it does entail many risks. The ideal system for cardiac output monitoring would be non-invasive, easy ...
- St George`s, University of London
... is a lack of prospective studies on the association between coagulation markers and incident HF in general populations. We have examined the association between the coagulation markers fibrinogen, von Willebrand Factor (VWF), Factors VII, VIII and IX, D-dimer, activated protein C (APC) and activated ...
... is a lack of prospective studies on the association between coagulation markers and incident HF in general populations. We have examined the association between the coagulation markers fibrinogen, von Willebrand Factor (VWF), Factors VII, VIII and IX, D-dimer, activated protein C (APC) and activated ...
Contemporary Reviews in Cardiovascular Medicine
... and thus efficiency, can be quantified through invasive measurements. Although these measurements are accurate and currently considered the gold standard, in clinical practice they are limited because of the need for dual-sided heart catheterization and selective catheterization of the coronary sinu ...
... and thus efficiency, can be quantified through invasive measurements. Although these measurements are accurate and currently considered the gold standard, in clinical practice they are limited because of the need for dual-sided heart catheterization and selective catheterization of the coronary sinu ...
Cardiac Dysrhythmia following Pneumonectomy
... with significant mortality, have poor correlation to preoperative pulmonary ...
... with significant mortality, have poor correlation to preoperative pulmonary ...
Absence of the aortic valve cusps with mitral atresia, normal left
... be found (fig 1). The pulmonary trunk was dilated with a dysplastic pulmonary valve. Saline was injected through a catheter inserted into the aortic arch via the umbilical artery and bubbles passed to the left ventricle. The patient became increasingly ill and died when he was 24 hours old. The necr ...
... be found (fig 1). The pulmonary trunk was dilated with a dysplastic pulmonary valve. Saline was injected through a catheter inserted into the aortic arch via the umbilical artery and bubbles passed to the left ventricle. The patient became increasingly ill and died when he was 24 hours old. The necr ...
Pericardial Effusions and Cardiac Tamponade
... Irritation to diaphragm and phrenic nerve. Highest risk of liver injury Possibility of colon or stomach perforation ...
... Irritation to diaphragm and phrenic nerve. Highest risk of liver injury Possibility of colon or stomach perforation ...
Review on Flecainide poisoning - Hong Kong College of Emergency
... Flecainide acetate is a Vaughn-Williams class IC antiarrhythmic. It is used mainly for treatment of supraventricular arrhythmias due to reentry and is highly effective in suppressing frequent premature ventricular depolarization and nonsustained ventricular tachycardia (VT). Although less than 1% of ...
... Flecainide acetate is a Vaughn-Williams class IC antiarrhythmic. It is used mainly for treatment of supraventricular arrhythmias due to reentry and is highly effective in suppressing frequent premature ventricular depolarization and nonsustained ventricular tachycardia (VT). Although less than 1% of ...
Assessment of Right Ventricular Function by Tissue Doppler, Strain
... Background: Pulmonary artery hypertension is the presentation of various types of cardiovascular and systematic diseases. There are different kinds of noninvasive methods to determine right ventricular function, pulmonary artery pressure, and effect of pulmonary hypertension on right ventricular fun ...
... Background: Pulmonary artery hypertension is the presentation of various types of cardiovascular and systematic diseases. There are different kinds of noninvasive methods to determine right ventricular function, pulmonary artery pressure, and effect of pulmonary hypertension on right ventricular fun ...
Relationship Between Sinus Rhythm Activation and the
... also used to classify experiments in which reentry could versus could not be induced as described above for the activation gradientuniformity scatterplot. Locations at which the difference in sinus rhythm electrogram duration between any 2 adjacent sites (horizontal, vertical, or diagonal direction) ...
... also used to classify experiments in which reentry could versus could not be induced as described above for the activation gradientuniformity scatterplot. Locations at which the difference in sinus rhythm electrogram duration between any 2 adjacent sites (horizontal, vertical, or diagonal direction) ...
A novel transgenic rabbit model of a long QT syndrome caused by a
... Our novel and previously unpublished results in our new transgenic rabbit model can be summarized as follows: 1. We have successfully created and primarily characterized the first LQT5 syndrome transgenic rabbit model. The LQT5 rabbits were created by expressing human KCNE1, carrying a missense muta ...
... Our novel and previously unpublished results in our new transgenic rabbit model can be summarized as follows: 1. We have successfully created and primarily characterized the first LQT5 syndrome transgenic rabbit model. The LQT5 rabbits were created by expressing human KCNE1, carrying a missense muta ...
Work and Heart Disease
... the other jobs conformed to the general pattern. These differences may be related to the fact that the foreman's job is unpredictable, with a high degree of responsibility, while the controls operators and hot-strip and slab handlers have the most routine type of work, suggesting that the resting pu ...
... the other jobs conformed to the general pattern. These differences may be related to the fact that the foreman's job is unpredictable, with a high degree of responsibility, while the controls operators and hot-strip and slab handlers have the most routine type of work, suggesting that the resting pu ...
Clinical Indications for Echocardiography Echocardiography is
... M-mode echocardiography, tissue velocity imaging, 2D and 3D echocardiography, and contrast echocardiography). It does not include recommendations specifically relating to the practice of transoesophageal echocardiography and stress echocardiography, although attention is drawn where utilisation of o ...
... M-mode echocardiography, tissue velocity imaging, 2D and 3D echocardiography, and contrast echocardiography). It does not include recommendations specifically relating to the practice of transoesophageal echocardiography and stress echocardiography, although attention is drawn where utilisation of o ...
The Physiological and Evolutionary Significance of
... the ancestral state was terrestrial with an S/P of 2 (species A) and more interestingly that, each time lineage invaded an aquatic habitat and acquired diving behaviors (species C, D, and F), they also evolved an S/P 1 condition. Specifically, the heart became a single pressure pump, in which the di ...
... the ancestral state was terrestrial with an S/P of 2 (species A) and more interestingly that, each time lineage invaded an aquatic habitat and acquired diving behaviors (species C, D, and F), they also evolved an S/P 1 condition. Specifically, the heart became a single pressure pump, in which the di ...
Electrocardiography
Electrocardiography (ECG or EKG*) is the process of recording the electrical activity of the heart over a period of time using electrodes placed on a patient's body. These electrodes detect the tiny electrical changes on the skin that arise from the heart muscle depolarizing during each heartbeat.In a conventional 12 lead ECG, ten electrodes are placed on the patient's limbs and on the surface of the chest. The overall magnitude of the heart's electrical potential is then measured from twelve different angles (""leads"") and is recorded over a period of time (usually 10 seconds). In this way, the overall magnitude and direction of the heart's electrical depolarization is captured at each moment throughout the cardiac cycle. The graph of voltage versus time produced by this noninvasive medical procedure is referred to as an electrocardiogram (abbreviated ECG or EKG).During each heartbeat, a healthy heart will have an orderly progression of depolarization that starts with pacemaker cells in the sinoatrial node, spreads out through the atrium, passes through the atrioventricular node down into the bundle of His and into the Purkinje fibers spreading down and to the left throughout the ventricles. This orderly pattern of depolarization gives rise to the characteristic ECG tracing. To the trained clinician, an ECG conveys a large amount of information about the structure of the heart and the function of its electrical conduction system. Among other things, an ECG can be used to measure the rate and rhythm of heartbeats, the size and position of the heart chambers, the presence of any damage to the heart's muscle cells or conduction system, the effects of cardiac drugs, and the function of implanted pacemakers.