The Evaluation and Management of Electrical Storm
... Patients may experience intense electrical storms of polymorphic VT during episodes of ischemia. The most effective treatment is to reverse the ischemia with emergency coronary revascularization or with anti-ischemic, antiplatelet, or thrombolytic agents. Amiodarone and β-blockers are the most eff ...
... Patients may experience intense electrical storms of polymorphic VT during episodes of ischemia. The most effective treatment is to reverse the ischemia with emergency coronary revascularization or with anti-ischemic, antiplatelet, or thrombolytic agents. Amiodarone and β-blockers are the most eff ...
The Right Heart
... Prominent pulsation in neck – increased JVP. Eventually leads to HF or other complications ...
... Prominent pulsation in neck – increased JVP. Eventually leads to HF or other complications ...
Heart Rhythm Refresher Course 2014 Module 1: Epidemiology
... Athlete screening in the Veneto region of Italy is part of a national program (with 12lead ECG) that has reported the detection of previously undiagnosed hypertrophic cardiomyopathy and a decrease in the cardiovascular death rate in young athletes. In this study, over time periods of similar length, ...
... Athlete screening in the Veneto region of Italy is part of a national program (with 12lead ECG) that has reported the detection of previously undiagnosed hypertrophic cardiomyopathy and a decrease in the cardiovascular death rate in young athletes. In this study, over time periods of similar length, ...
Cardiac Function Curve
... Typical Values of P-V Loops (from previous Figure) for Constructing CFC Graph: P-V Loops ...
... Typical Values of P-V Loops (from previous Figure) for Constructing CFC Graph: P-V Loops ...
Natural Help for Arrhythmia
... But for some people, problems arise as the electrical impulses that synchronize the heart beat don’t function properly, causing the heart to beat out of rhythm - too quickly, too slowly or with an irregular pattern. Arrhythmias are fairly common. Most people have had at least one experience where it ...
... But for some people, problems arise as the electrical impulses that synchronize the heart beat don’t function properly, causing the heart to beat out of rhythm - too quickly, too slowly or with an irregular pattern. Arrhythmias are fairly common. Most people have had at least one experience where it ...
Stress testing: A contribution from Dr Robert A. Bruce
... include testing for functional capacity, chronotropic incompetence, cardiac rehabilitation, valvular heart disease, hypertrophic cardiomyopathy, arrhythmias, and pacemaker evaluation.8-10 In addition, exercise testing has been combined with other modalities such as radionuclide imaging and echocardi ...
... include testing for functional capacity, chronotropic incompetence, cardiac rehabilitation, valvular heart disease, hypertrophic cardiomyopathy, arrhythmias, and pacemaker evaluation.8-10 In addition, exercise testing has been combined with other modalities such as radionuclide imaging and echocardi ...
New mathematical model for the surface area of the left ventricle by
... way in terms of Appell’s generalized hypergeometrical functions [15]. However, since the normal LV has its two short axles with practically identical measurements and only one apex, it’s believed that the geometry of a general ellipsoid is no longer adequate for this association, and it can lead to ...
... way in terms of Appell’s generalized hypergeometrical functions [15]. However, since the normal LV has its two short axles with practically identical measurements and only one apex, it’s believed that the geometry of a general ellipsoid is no longer adequate for this association, and it can lead to ...
`End-stage` heart failure therapy - Heart
... form in infants and young children, while ischaemic DCM predominates in adults. DCM is a myocardial disease with systolic cardiac dysfunction and dilatation.8 Considering patients with a systemic RV, the long-term outcome is directly related to a balanced ventricular interaction and the competence o ...
... form in infants and young children, while ischaemic DCM predominates in adults. DCM is a myocardial disease with systolic cardiac dysfunction and dilatation.8 Considering patients with a systemic RV, the long-term outcome is directly related to a balanced ventricular interaction and the competence o ...
Effets du RAAS sur l`AF
... alpha subunit expression was greatly attenuated by simvastatin. Retrospective meta-analysis have suggested a beneficial effect in AF in man Statin therapy has also been found to reduce the risk for first ventricular arrhythmia in pts with CAD and an ICD.** * Shiroshita-Takeshita et al. Circulati ...
... alpha subunit expression was greatly attenuated by simvastatin. Retrospective meta-analysis have suggested a beneficial effect in AF in man Statin therapy has also been found to reduce the risk for first ventricular arrhythmia in pts with CAD and an ICD.** * Shiroshita-Takeshita et al. Circulati ...
Atrioventricular Nodal Function in the Immature Canine
... paced beat until atrial or ventricular refractoriness, respectively, was reached. Both atrium and ventricle were paced at identical cycle lengths. In this study, we attempted to measure atrial, AV nodal and ventricular refractoriness under basal conditions. However, because of naturally occurring si ...
... paced beat until atrial or ventricular refractoriness, respectively, was reached. Both atrium and ventricle were paced at identical cycle lengths. In this study, we attempted to measure atrial, AV nodal and ventricular refractoriness under basal conditions. However, because of naturally occurring si ...
Putting your heart into physics
... heart. The voltage as a function of time takes on the form shown in Fig. 1. A voltage pulse is produced whenever a heartbeat occurs. The large spike is called the R peak and is a good reference point to define the time of the heartbeat. The time from one R peak to the next R peak, an interspike inte ...
... heart. The voltage as a function of time takes on the form shown in Fig. 1. A voltage pulse is produced whenever a heartbeat occurs. The large spike is called the R peak and is a good reference point to define the time of the heartbeat. The time from one R peak to the next R peak, an interspike inte ...
Print - Circulation Research
... produced by changes in initial muscle fiber length and contractility (for definitions see Noble, 1972)? The effects of these interventions on the pump function graph of an isolated ejecting cat heart are shown in Figure 3 (data taken from Elzinga and Westerhof, 1978). The three relationships in this ...
... produced by changes in initial muscle fiber length and contractility (for definitions see Noble, 1972)? The effects of these interventions on the pump function graph of an isolated ejecting cat heart are shown in Figure 3 (data taken from Elzinga and Westerhof, 1978). The three relationships in this ...
A novel clinical risk prediction model for sudden cardiac death in
... *Inherited Cardiac Diseases Unit, The Heart Hospital/University College London, London, United Kingdom ** Department of Statistics, University College London ...
... *Inherited Cardiac Diseases Unit, The Heart Hospital/University College London, London, United Kingdom ** Department of Statistics, University College London ...
Atrioventricular plane displacement is the sole - AJP
... the ventricular refill. For example, 5–7-mm pressure difference between venules and veins (8) (see Fig. 3A) provides a slow flow of blood toward the heart. But a subtle pressure difference between the large veins and the heart chambers, as qualitative estimates show, is not sufficient for filling th ...
... the ventricular refill. For example, 5–7-mm pressure difference between venules and veins (8) (see Fig. 3A) provides a slow flow of blood toward the heart. But a subtle pressure difference between the large veins and the heart chambers, as qualitative estimates show, is not sufficient for filling th ...
Time course of recovery of heart period variability after
... (MPIP) sample . There was only one significant difference between the two groups for any measure of heart period variability, a small but significant difference between the two samples for high frequency power i ratio for unpaired data 2.88, df 803, p < 0.Oi). Part of this difference may be %, al, b ...
... (MPIP) sample . There was only one significant difference between the two groups for any measure of heart period variability, a small but significant difference between the two samples for high frequency power i ratio for unpaired data 2.88, df 803, p < 0.Oi). Part of this difference may be %, al, b ...
Current thinking on sudden cardiac death
... arrests in Scotland1 and in the US sudden death is responsible for more than 60% of adult deaths from coronary heart disease (CHD).2 An estimated 700,000 Europeans will suffer a cardiac arrest annually,3 with CHD being the major structural abnormality found in most sudden cardiac arrest victims.4, 5 ...
... arrests in Scotland1 and in the US sudden death is responsible for more than 60% of adult deaths from coronary heart disease (CHD).2 An estimated 700,000 Europeans will suffer a cardiac arrest annually,3 with CHD being the major structural abnormality found in most sudden cardiac arrest victims.4, 5 ...
Septal to Posterior Wall Motion Delay Fails to Predict
... the time of enrollment for an implantable cardioverter defibrillator, symptomatic heart failure despite optimal drug therapy, left ventricular ejection fraction (LVEF) ⱕ35%, a QRS duration ⱖ120 ms; age ⱖ18 years, and normal sinus node function. The exclusion criteria and study design have been descr ...
... the time of enrollment for an implantable cardioverter defibrillator, symptomatic heart failure despite optimal drug therapy, left ventricular ejection fraction (LVEF) ⱕ35%, a QRS duration ⱖ120 ms; age ⱖ18 years, and normal sinus node function. The exclusion criteria and study design have been descr ...
Chapter 27 Development of circulatory system
... ---blood island: at the middle of 3rd week, wall of the yolk sac mesenchyma proliferate and form isolated cell clusters, the peripheral cell become flattened and differentiate into endothelial cell to from endothelial tube; central located cells are detached and develop into primitive blood cells(bl ...
... ---blood island: at the middle of 3rd week, wall of the yolk sac mesenchyma proliferate and form isolated cell clusters, the peripheral cell become flattened and differentiate into endothelial cell to from endothelial tube; central located cells are detached and develop into primitive blood cells(bl ...
Chapter 27 Development of circulatory system
... ---blood island: at the middle of 3rd week, wall of the yolk sac mesenchyma proliferate and form isolated cell clusters, the peripheral cell become flattened and differentiate into endothelial cell to from endothelial tube; central located cells are detached and develop into primitive blood cells(bl ...
... ---blood island: at the middle of 3rd week, wall of the yolk sac mesenchyma proliferate and form isolated cell clusters, the peripheral cell become flattened and differentiate into endothelial cell to from endothelial tube; central located cells are detached and develop into primitive blood cells(bl ...
Control of Cardiac Rate by “Funny” Channels in Health and Disease
... The concept of heart-rate reduction as a useful therapeutic intervention for some cardiovascular diseases is validated by several studies showing a tight association between elevated heart rate and mortality in subjects affected by coronary artery disease (CAD) as well as in the general population.5 ...
... The concept of heart-rate reduction as a useful therapeutic intervention for some cardiovascular diseases is validated by several studies showing a tight association between elevated heart rate and mortality in subjects affected by coronary artery disease (CAD) as well as in the general population.5 ...
Left-to-right interatrial shunt percutaneously
... engage the right end of the device. The shunt can be release once in the target position with the opening of these hooks and after pulling back the delivery catheter. Once implanted, the pressure gradient existing between the left and right atria enable flow from the left to the right atrium through ...
... engage the right end of the device. The shunt can be release once in the target position with the opening of these hooks and after pulling back the delivery catheter. Once implanted, the pressure gradient existing between the left and right atria enable flow from the left to the right atrium through ...
Electrocardiography - Tehran Arrhythmia Center
... AV node Bundle of His Bundle Branches Purkinje fibers Tehran Arrhythmia Center ...
... AV node Bundle of His Bundle Branches Purkinje fibers Tehran Arrhythmia Center ...
Effect of Training Mode on Post-Exercise Heart Rate Recovery of
... indicative of vagal tone and HRV being more indicative of parasympathetic activation (Borresen and Lambert, 2008). In other work, Heffernan (2007) looked at changes in HRV and HRRec after shortterm resistance training protocols and he found no change in HRV, but did see change in HRRec. Both variabl ...
... indicative of vagal tone and HRV being more indicative of parasympathetic activation (Borresen and Lambert, 2008). In other work, Heffernan (2007) looked at changes in HRV and HRRec after shortterm resistance training protocols and he found no change in HRV, but did see change in HRRec. Both variabl ...
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.