Print - Circulation
... value of each tomographic slice was taken as the value at the center of the 8-mm-thick slice. The long axis defined at end systole was used as a common axis for both end diastole and end systole. This was important for optimal matching of regions before and after contraction, especially when analyzi ...
... value of each tomographic slice was taken as the value at the center of the 8-mm-thick slice. The long axis defined at end systole was used as a common axis for both end diastole and end systole. This was important for optimal matching of regions before and after contraction, especially when analyzi ...
Electrocardiographic changes associated with serum electrolyte
... have been reported together effecting the same heart. 54 To complete the discussion of alterations of serum potassium and the electrocardiographic manifestations it rnay be well to correlate some of the electrophysiological aspects presented earlier in this paper with the actual changes seen on the ...
... have been reported together effecting the same heart. 54 To complete the discussion of alterations of serum potassium and the electrocardiographic manifestations it rnay be well to correlate some of the electrophysiological aspects presented earlier in this paper with the actual changes seen on the ...
Structural and functional changes in maternal left ventricle during
... served as controls. Global longitudinal strain (GLS), global circumferential strain (GCS), global area strain (GAS) and global radial strain (GRS) were measured. Results: Increased cardiac index and progressive eccentric hypertrophy was detected, which subsequently recovered postpartum. In late preg ...
... served as controls. Global longitudinal strain (GLS), global circumferential strain (GCS), global area strain (GAS) and global radial strain (GRS) were measured. Results: Increased cardiac index and progressive eccentric hypertrophy was detected, which subsequently recovered postpartum. In late preg ...
The Effect of Temperature Acclimation and Adrenaline on the
... lowered to 35-40 cm H20 and then increased in a stepwise fashion to 7375 cm H20 without changing input pressure. Outputpressurewas variedby adjustingthe height of the output-pressurehead. Qwas monitored throughout. All preparationscould generate an outflowat outputpressuresof 73-75 cm H20, but only ...
... lowered to 35-40 cm H20 and then increased in a stepwise fashion to 7375 cm H20 without changing input pressure. Outputpressurewas variedby adjustingthe height of the output-pressurehead. Qwas monitored throughout. All preparationscould generate an outflowat outputpressuresof 73-75 cm H20, but only ...
Energy Transfer Ratio as a Metric of Right Ventricular Efficiency in
... Achieva MRI scanner (Philips Healthcare, Best, The Netherlands). CMR In this study, CMR was performed under general anesthesia with breath holding or respiratory suspension technique. Standard CMR protocols were used. They included steady-state free precession in the 2-, 4- chamber and short axis pl ...
... Achieva MRI scanner (Philips Healthcare, Best, The Netherlands). CMR In this study, CMR was performed under general anesthesia with breath holding or respiratory suspension technique. Standard CMR protocols were used. They included steady-state free precession in the 2-, 4- chamber and short axis pl ...
Progressive Caloric Restriction Induces Dose
... All MRI/MRS measurements were performed on a 1.5-Tesla Gyroscan ACS-NT MRI scanner (Philips Medical Systems, Best, The Netherlands) in the supine position. Localized single voxel (2 ⫻ 2 ⫻ 2 cm for the liver and 2 ⫻ 4 ⫻ 1 cm for the heart) spectra were recorded using a body coil for radiofrequency tr ...
... All MRI/MRS measurements were performed on a 1.5-Tesla Gyroscan ACS-NT MRI scanner (Philips Medical Systems, Best, The Netherlands) in the supine position. Localized single voxel (2 ⫻ 2 ⫻ 2 cm for the liver and 2 ⫻ 4 ⫻ 1 cm for the heart) spectra were recorded using a body coil for radiofrequency tr ...
Cardiac magnetic resonance imaging-based myocardial strain study
... Trastuzumab, a humanized monoclonal antibody against the extracellular domain of human epidermal growth factor receptor 2 (HER2), improves clinical outcomes in patients with breast cancer overexpressing HER2. Adjuvant therapy using trastuzumab reportedly reduces the risk of relapse by about a half a ...
... Trastuzumab, a humanized monoclonal antibody against the extracellular domain of human epidermal growth factor receptor 2 (HER2), improves clinical outcomes in patients with breast cancer overexpressing HER2. Adjuvant therapy using trastuzumab reportedly reduces the risk of relapse by about a half a ...
LRRC10 is required to maintain cardiac function in - AJP
... undergoes hypertrophy as an adaptive mechanism to maintain cardiac output and reduce ventricular wall stress (20, 23, 38). While initially beneficial, prolonged cardiac hypertrophy becomes maladaptive and progresses to cardiac dilation, decompensation, heart failure, and/or sudden death (20, 23, 38) ...
... undergoes hypertrophy as an adaptive mechanism to maintain cardiac output and reduce ventricular wall stress (20, 23, 38). While initially beneficial, prolonged cardiac hypertrophy becomes maladaptive and progresses to cardiac dilation, decompensation, heart failure, and/or sudden death (20, 23, 38) ...
Left ventricular dynamics during handgrip - Heart
... in mitral incompetence, may render the evaluation of left ventricular function from pressure measurements alone of questionable significance. It is therefore the purpose of this paper to describe the effects of handgrip on the ...
... in mitral incompetence, may render the evaluation of left ventricular function from pressure measurements alone of questionable significance. It is therefore the purpose of this paper to describe the effects of handgrip on the ...
Newly Diagnosed Atrial Fibrillation
... or greater are associated with a reduced severity of stroke and, if stroke occurs, a lower likelihood that it will result in death.38 Certain patients are at relatively low risk for a thromboembolic event and do not require intensive anticoagulant therapy11,33,35 (Table 1). Aspirin is often recommen ...
... or greater are associated with a reduced severity of stroke and, if stroke occurs, a lower likelihood that it will result in death.38 Certain patients are at relatively low risk for a thromboembolic event and do not require intensive anticoagulant therapy11,33,35 (Table 1). Aspirin is often recommen ...
Electrical and Anatomical Modeling of the Specialized Cardiac
... Figure 30. Location of the AVN in the ventricular model ........................................................ 48 Figure 31. Configuration HB4 of the HB .................................................................................. 50 Figure 32. Configuration HB5 of the HB .................... ...
... Figure 30. Location of the AVN in the ventricular model ........................................................ 48 Figure 31. Configuration HB4 of the HB .................................................................................. 50 Figure 32. Configuration HB5 of the HB .................... ...
Differential Profile and Biochemical Effects of
... Figure 3 illustrates the correlation of the electrocardiographic findings with the in vitro effects of the IgG from 2 patients, 1 with a “pure” primary SND (A) and the other with chagasic VA (B). In Figure 3A, a pronounced sinus bradycardia that was corrected by atropine (top) and the chronotropic e ...
... Figure 3 illustrates the correlation of the electrocardiographic findings with the in vitro effects of the IgG from 2 patients, 1 with a “pure” primary SND (A) and the other with chagasic VA (B). In Figure 3A, a pronounced sinus bradycardia that was corrected by atropine (top) and the chronotropic e ...
Closing the Pore on Reperfusion InjuryMyocardial
... gov, of which only the minority are related to the prevention of myocardial injury, suggesting that this drug affects multiple different pathways. The effect of cyclosporine on the mPTP is not selective, as it also inhibits phosphatase calcineurin activity, which in turn may limit the degree of prot ...
... gov, of which only the minority are related to the prevention of myocardial injury, suggesting that this drug affects multiple different pathways. The effect of cyclosporine on the mPTP is not selective, as it also inhibits phosphatase calcineurin activity, which in turn may limit the degree of prot ...
How We Perform Delayed Enhancement Imaging
... seen when the TI is set correctly (Fig. 4c). This is due to the periphery of the infarcted region passing through a zero-crossing, thereby affecting its apparent size (Judd and Kim, 2002). If the TI is set too long (Fig. 4d), although the contrast is reduced as previously stated, the total extent of ...
... seen when the TI is set correctly (Fig. 4c). This is due to the periphery of the infarcted region passing through a zero-crossing, thereby affecting its apparent size (Judd and Kim, 2002). If the TI is set too long (Fig. 4d), although the contrast is reduced as previously stated, the total extent of ...
Cardiovascular magnetic resonance pocket guide, 2013
... Slow flow artefacts may cause high signal at endocardial border ...
... Slow flow artefacts may cause high signal at endocardial border ...
Increases Left-to-Right Ventricular Systolic Interaction
... coupling between the right and left ventricles via the shared interventricular septum, common muscle fibers in the free walls, and the pericardium. It is useful to further subdivide anatomic mechanical interactions into those occurring during diastole and systole. Systolic ventricular interaction is ...
... coupling between the right and left ventricles via the shared interventricular septum, common muscle fibers in the free walls, and the pericardium. It is useful to further subdivide anatomic mechanical interactions into those occurring during diastole and systole. Systolic ventricular interaction is ...
Relative expression of immunolocalized connexins 40 and
... BACKGROUND As a determinant of intercellular conductance, gap-junctional coupling is considered to influence myocardial conduction velocity. This study tested the hypothesis that the quantity of immunodetectable atrial gap-junctional proteins, connexin40 (Cx40) and connexin43 (Cx43), are related to ...
... BACKGROUND As a determinant of intercellular conductance, gap-junctional coupling is considered to influence myocardial conduction velocity. This study tested the hypothesis that the quantity of immunodetectable atrial gap-junctional proteins, connexin40 (Cx40) and connexin43 (Cx43), are related to ...
Table 2 - JACC: Heart Failure
... 12 weeks (9). A newer training technique termed “highintensity interval training” (HIT) may yield greater improvements in peak VO2 (up to 46%) than moderate intensity continuous training in patients with systolic CHF (10). (See the Exercise Prescription for CHF section for more details.) A meta-anal ...
... 12 weeks (9). A newer training technique termed “highintensity interval training” (HIT) may yield greater improvements in peak VO2 (up to 46%) than moderate intensity continuous training in patients with systolic CHF (10). (See the Exercise Prescription for CHF section for more details.) A meta-anal ...
EHRA/HRS/APHRS Expert Consensus on Ventricular Arrhythmias
... patients with LV hypertrophy (LVH).16 However, these studies were observational and performed in an era prior to modern management.17 In a study of patients with congestive heart failure [ejection fraction (EF), 35%], PVC frequency did not predict the risk of sudden death and did not provide prognos ...
... patients with LV hypertrophy (LVH).16 However, these studies were observational and performed in an era prior to modern management.17 In a study of patients with congestive heart failure [ejection fraction (EF), 35%], PVC frequency did not predict the risk of sudden death and did not provide prognos ...
Evaluation of Cardiothoracic Ratio of Normal Subjects
... The cardiothoracic ratio (CTR) is the ratio of the cardiac diameter (CD) to the thoracic diameter (TD) . It is a useful screening method to detect cardiomegaly. The importance of this study is to estimate the CTR among healthy population in order to establish a constant range or value which could be ...
... The cardiothoracic ratio (CTR) is the ratio of the cardiac diameter (CD) to the thoracic diameter (TD) . It is a useful screening method to detect cardiomegaly. The importance of this study is to estimate the CTR among healthy population in order to establish a constant range or value which could be ...
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.