The electrocardiogram is a recording of the electrical activity of the heart as it undergoes excitation (depolarization) and recovery (polarization) to initiate each beat of the heart. This electrical activity is represented by a tracing showing the various phases of the activity above or below ...
BENCHIMOL A, DIMoND EC: The apexcardio- gram in normal older subjects and in patients with arteriosclerotic heart disease: Effect of exercise on the "a" wave. Amer Heart J 65: 789, 1963BENCHIMOL A, DIMOND EG: The apexcardio- gram in normal older subjects and in patients with ...
Enter the following command to verify the status and location of the subsystem cards: rept-stat-mps Verify the VSCCP card(s) reset in 2 are IS-NR. If not, reseat the card(s). If any card(s) remain OOS-MT, replace the card(s). Refer to the Maintenance Manual for card rem...
Blood in the aorta forces the valves to close causing a movement of the heart towards the apex of the heart. Mounsey explains this further by comparing two recordings of the SCG, one from the upper sternal area and one from the apical area. The deflections in the two recordings are ...
with the LV apex-to-base distance as the long axisaand the anterior-to-posterior LV wall distance as the short axis diameterb, with\(V=\pi ab^2/6\). Heart rate (HR) was obtained from the temporal lag in between two QRS complexes measured with standard echocardiography, and time was ...
In this chapter, the normal anatomy of the heart as well as pathologic cases is consistent with cardiac malposition and isomerism, septal defects, pulmonary stenosis/atresia/absent pulmonary valve syndrome, aortic malformation, hypoplastic left heart, co
Cardiovascular magnetic resonance (CMR) enables assessment and quantification of morphological and functional parameters of the heart, including chamber size and function, diameters of the aorta and pulmonary arteries, flow and myocardial relaxation times. Knowledge of reference ranges (“normal values”) ...
Enter the following command to verify the status and location of the subsystem cards: rept-stat-mps Verify the SCCP card(s) reset in 2 are IS-NR. If not, reseat the card(s). If any card(s) remain OOS-MT, replace the card(s). Refer to the Maintenance Manual for card remov...
Mid-LAD is best imaged by placing the transducer in a low parasternal position. The interventricular groove is located in a short-axis view and then the transducer is either tilted towards the base of the heart or rotated to obtain a modified long-axis view (aligned parallel to the groove...
The virtual channel thus created by the vortices may help insure efficient mass transfer for the left atrium to the LV apex. Impairment of this mechanism contributes to diastolic dysfunction, with LV filling becoming dependent on left atrial pressure, which can lead to eventual heart failure. ...