Influence of Aging on Cardiac Function
... flow, the E/A ratio of transtricuspid flow decreased slowly where for subjects who were in their 70’s, the average value of E/A ratio was 1.06 ± 0.29, which was not below 1.0 and the inversion of E wave and A wave was 40% from overall result. For subjects who were in their 80’s, the inversion of E a ...
... flow, the E/A ratio of transtricuspid flow decreased slowly where for subjects who were in their 70’s, the average value of E/A ratio was 1.06 ± 0.29, which was not below 1.0 and the inversion of E wave and A wave was 40% from overall result. For subjects who were in their 80’s, the inversion of E a ...
Arrhythmogenesis by single ectopic beats originating in the Purkinje
... resistance, which allows small charge displacements to cause large changes in Vm (37). Finally, since Purkinje cells are only coupled in one dimension, there is reduced electrotonic suppression of myocardial EAD propagation. Persistent bundle branch reentry (BBR) as a mechanism of sustained tachycar ...
... resistance, which allows small charge displacements to cause large changes in Vm (37). Finally, since Purkinje cells are only coupled in one dimension, there is reduced electrotonic suppression of myocardial EAD propagation. Persistent bundle branch reentry (BBR) as a mechanism of sustained tachycar ...
Investigation of distal aortic compliance and
... constriction of the ascending aorta. Guinea pigs underwent constriction of the ascending aorta or sham operation. Sections of descending aorta were removed for studies of contractile performance and compliance. Dynamic compliance was measured using a feedback-controlled pulsatile pressure system at ...
... constriction of the ascending aorta. Guinea pigs underwent constriction of the ascending aorta or sham operation. Sections of descending aorta were removed for studies of contractile performance and compliance. Dynamic compliance was measured using a feedback-controlled pulsatile pressure system at ...
Mitral valve prolapse by Ronald Hoffman, M.D., CNS May 1996
... If the sympathetic nervous system of a person with MVP is aroused, they can suddenly feel crushing chest pain, with heartbeat racing and pounding. They may begin to hyperventilate, feel short of breath, and break out into a cold sweat. Certain people with mitral valve prolapse sometimes experience t ...
... If the sympathetic nervous system of a person with MVP is aroused, they can suddenly feel crushing chest pain, with heartbeat racing and pounding. They may begin to hyperventilate, feel short of breath, and break out into a cold sweat. Certain people with mitral valve prolapse sometimes experience t ...
Назва наукового напрямку (модуля): Семестр: 4 Модуль 4 Цикл
... A 62 years old patient has pathology of the coronary blood circulation. The I, II standard and the V3-V4 leads show the negative T wave. Normally, it has to be negative only in one lead. What is this lead? aVF aVR aVL ІІІ standard V1. Doctors have identified the maximal amplitude of the R wave in V6 ...
... A 62 years old patient has pathology of the coronary blood circulation. The I, II standard and the V3-V4 leads show the negative T wave. Normally, it has to be negative only in one lead. What is this lead? aVF aVR aVL ІІІ standard V1. Doctors have identified the maximal amplitude of the R wave in V6 ...
HRS/EHRA/APHRS Expert Consensus Statement on the Diagnosis
... This document does not address the indications of genetic testing in patients affected by inherited arrhythmias and their family members. Diagnostic, prognostic, and therapeutic implications of the results of genetic testing also are not included in this document because this topic has been covered ...
... This document does not address the indications of genetic testing in patients affected by inherited arrhythmias and their family members. Diagnostic, prognostic, and therapeutic implications of the results of genetic testing also are not included in this document because this topic has been covered ...
TEE - RadMD
... patients. Indications for TEE in the critically ill are similar to standard TEE indications in all patients. However, certain scenarios in a critically ill patient may be more quickly and thoroughly invested with TEE as the initial diagnostic procedure, including: ...
... patients. Indications for TEE in the critically ill are similar to standard TEE indications in all patients. However, certain scenarios in a critically ill patient may be more quickly and thoroughly invested with TEE as the initial diagnostic procedure, including: ...
PDF - Circulation: Arrhythmia and Electrophysiology
... Upper Track: Atrial Pacing During VT as the Initiating Mechanism of Railroad Tracks Figure 2A shows that AP in case 1 occurs at every other sensed VS event. Atrial pacing accounts for the upper track in the ICD interval plot shown in Figure 1. How does AP initiate during VT? In a typical dual chambe ...
... Upper Track: Atrial Pacing During VT as the Initiating Mechanism of Railroad Tracks Figure 2A shows that AP in case 1 occurs at every other sensed VS event. Atrial pacing accounts for the upper track in the ICD interval plot shown in Figure 1. How does AP initiate during VT? In a typical dual chambe ...
Echocardiographic assessment of right heart indices in dogs with
... heart function assessment). The MAP/Ao and diastolic LV-EI of Group 3 were significantly higher than in other groups (P < 0.008 and P < 0.001, respectively). The RVD/LVD was significantly higher in Groups 2 and 3 than in Groups 1, 4, and 5 (P < 0.02 and P < 0.001). The RVD/Ao was significantly highe ...
... heart function assessment). The MAP/Ao and diastolic LV-EI of Group 3 were significantly higher than in other groups (P < 0.008 and P < 0.001, respectively). The RVD/LVD was significantly higher in Groups 2 and 3 than in Groups 1, 4, and 5 (P < 0.02 and P < 0.001). The RVD/Ao was significantly highe ...
Public Summary Document - Word 261 KB
... definition of which centres should provide this service and by what criteria they should be identified; definition of who should perform the remote monitoring of the haemodynamic sensor output and by what criteria these individuals should be identified; definition of any entities which should ...
... definition of which centres should provide this service and by what criteria they should be identified; definition of who should perform the remote monitoring of the haemodynamic sensor output and by what criteria these individuals should be identified; definition of any entities which should ...
Effect of Drugs on Daphnia
... Table 1. 4. Add one drop of solution containing soda with sugar. Allow the Daphnia to acclimate for 3-5 minutes. Observe the movement and heart rate. If possible, take a heart rate count and record below in Table 1, 5. If there is time, complete steps 3 and 4 using other over the counter drugs, obse ...
... Table 1. 4. Add one drop of solution containing soda with sugar. Allow the Daphnia to acclimate for 3-5 minutes. Observe the movement and heart rate. If possible, take a heart rate count and record below in Table 1, 5. If there is time, complete steps 3 and 4 using other over the counter drugs, obse ...
Echocardiographic Effects of Eplerenone and Aldosterone in
... Figure 3. interval plot Cardiac index comparison between SHR and WKY strains over time. criteria for Grade I diastolic dysfunction (12). The calculation of index of myocardial performance (Tei Index) used aortic ejection time (ET) and mitral valve closure to opening time (MCO) (12). MCO is the sum o ...
... Figure 3. interval plot Cardiac index comparison between SHR and WKY strains over time. criteria for Grade I diastolic dysfunction (12). The calculation of index of myocardial performance (Tei Index) used aortic ejection time (ET) and mitral valve closure to opening time (MCO) (12). MCO is the sum o ...
Impact of Obesity on Cardiac Geometry and Function in a Population
... convenience, we will use the term overweight to label the NCHS’ “risk of overweight” class and the terms obese for the NCHS’ “overweight” class. Guidelines correction was applied (18) so that the limit separating overweight and obesity did not exceed a BMI of 30 kg/m2. For adolescents up to 18 years ...
... convenience, we will use the term overweight to label the NCHS’ “risk of overweight” class and the terms obese for the NCHS’ “overweight” class. Guidelines correction was applied (18) so that the limit separating overweight and obesity did not exceed a BMI of 30 kg/m2. For adolescents up to 18 years ...
Word - American Society of Exercise Physiologists
... females, age 20.06 ± 0.36 yrs, BMI 27.46 ± 1.52 kg·m-2]; and (b) normal weight [N = 20; 4 males and 16 females, age 20.11 ± 0.66 yrs, BMI 20.50 ± 1.75 kg·m-2]. The two groups were matched for age and sex. Before being offered a consent form to participate the subjects were informed of their role in ...
... females, age 20.06 ± 0.36 yrs, BMI 27.46 ± 1.52 kg·m-2]; and (b) normal weight [N = 20; 4 males and 16 females, age 20.11 ± 0.66 yrs, BMI 20.50 ± 1.75 kg·m-2]. The two groups were matched for age and sex. Before being offered a consent form to participate the subjects were informed of their role in ...
Mean Frequency Of Premature Ventricular Complexes As
... little independent prognostic significance (17). Assessing the relationship between mean frequency of PVCs and mortality was beyond the scope and methodology of this study. However, our findings suggest that the mean frequency of PVCs may be a useful measure for the risk stratification of ICD patien ...
... little independent prognostic significance (17). Assessing the relationship between mean frequency of PVCs and mortality was beyond the scope and methodology of this study. However, our findings suggest that the mean frequency of PVCs may be a useful measure for the risk stratification of ICD patien ...
Myosin Types and Fiber Types in Cardiac Muscle. III. Nodal
... through a gate mechanism on arriving impulses, and of latent pacemaker activity. The AV node is continuous with the His bundle that transmits the impulse to the ventricular myocardium. Nodal muscle cells are smaller than ordinary myocardial cells and have sparse myofibrils, poorly developed sarcotub ...
... through a gate mechanism on arriving impulses, and of latent pacemaker activity. The AV node is continuous with the His bundle that transmits the impulse to the ventricular myocardium. Nodal muscle cells are smaller than ordinary myocardial cells and have sparse myofibrils, poorly developed sarcotub ...
... mutations that have been associated robustly with this part of the heart. Despite the existence of rare family clustering of HLHS, linkage analysis has been unproductive.17–20 However, embryologically, there are clues. The severe hypoplasia of left heart structures is probably a consequence of limit ...
Implantable Cardioverter Defibrillator (ICD)
... device that corrects your heart rhythm. An ICD has a pulse generator that is implanted in your body, and one or more leads (wires) that are threaded into your heart. ...
... device that corrects your heart rhythm. An ICD has a pulse generator that is implanted in your body, and one or more leads (wires) that are threaded into your heart. ...
Low to High Frequency Ratio of Heart Rate Variability Spectra Fails
... theory or the catastrophe theory model are sometimes used to explain physiological or pathological cardiac changes32, but it seems that some new model has to be established to explain the spectral HRV changes during the process of cardiac disease. The long-term (24-hour) HRV measurements utilised in ...
... theory or the catastrophe theory model are sometimes used to explain physiological or pathological cardiac changes32, but it seems that some new model has to be established to explain the spectral HRV changes during the process of cardiac disease. The long-term (24-hour) HRV measurements utilised in ...
042601 Cardiac Resuscitation
... off where the pad or paddles are to be placed. If perspiration or conducting gel has been smeared across the chest during cardiopulmonary resuscitation, it should be removed with a towel before defibrillation. Some defibrillation errors are a result of unfamiliarity with the machine. A common proble ...
... off where the pad or paddles are to be placed. If perspiration or conducting gel has been smeared across the chest during cardiopulmonary resuscitation, it should be removed with a towel before defibrillation. Some defibrillation errors are a result of unfamiliarity with the machine. A common proble ...
Myosin Types and Fiber Types in Cardiac Muscle
... through a gate mechanism on arriving impulses, and of latent pacemaker activity. The AV node is continuous with the His bundle that transmits the impulse to the ventricular myocardium. Nodal muscle cells are smaller than ordinary myocardial cells and have sparse myofibrils, poorly developed sarcotub ...
... through a gate mechanism on arriving impulses, and of latent pacemaker activity. The AV node is continuous with the His bundle that transmits the impulse to the ventricular myocardium. Nodal muscle cells are smaller than ordinary myocardial cells and have sparse myofibrils, poorly developed sarcotub ...
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.